U.S. patent application number 16/919261 was filed with the patent office on 2021-05-27 for super-wear-resistant self-cleaning coating and preparation method therefor.
The applicant listed for this patent is BANFERT NEW-MATERIALS TECHNOLOGY CO., LTD. Invention is credited to Hui LI, Shizhen LI, Xinxiong LI.
Application Number | 20210155809 16/919261 |
Document ID | / |
Family ID | 1000005579918 |
Filed Date | 2021-05-27 |
United States Patent
Application |
20210155809 |
Kind Code |
A1 |
LI; Xinxiong ; et
al. |
May 27, 2021 |
SUPER-WEAR-RESISTANT SELF-CLEANING COATING AND PREPARATION METHOD
THEREFOR
Abstract
A super-wear-resistant self-cleaning coating, comprising first
elastic finish coat and second self-cleaning finish coat. The first
elastic finish coat comprises, by mass, 10-60 parts of a
two-functionality-degree polyurethane acrylic resin A, 2-7 parts of
an initiator A, 10-60 parts of an acrylate monomer A, and 3-40
parts of an additive A. The second self-cleaning finish coat
comprises, by mass, 2-30 parts of an acrylic acid-modified organic
silicon resin with inorganic powder affinity, 0.3-3 parts of
high-hardness micro-powder particles, 2-20 parts of a
two-functionality-degree polyurethane acrylic resin B, 10-40 parts
of a multi-functionality-degree polyurethane acrylic resin B, 15-45
parts of an acrylate monomer B, 2-7 parts of an initiator B, and
3-40 parts of an additive B. Further disclosed is a preparation
method for the super-wear-resistant self-cleaning coating.
Inventors: |
LI; Xinxiong; (Changsha,
CN) ; LI; Shizhen; (Changsha, CN) ; LI;
Hui; (Changsha, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BANFERT NEW-MATERIALS TECHNOLOGY CO., LTD |
Changsha |
|
CN |
|
|
Family ID: |
1000005579918 |
Appl. No.: |
16/919261 |
Filed: |
July 2, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/CN2019/120504 |
Nov 25, 2019 |
|
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16919261 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
C09D 4/06 20130101; C08K
3/22 20130101; C08L 75/04 20130101; C08K 2201/005 20130101; C09D
5/1693 20130101; C09D 5/1637 20130101; C08K 3/04 20130101; C08K
2003/2227 20130101; C08K 3/34 20130101; C08G 18/837 20130101; C08G
18/289 20130101; C08K 3/14 20130101; C09D 5/1687 20130101 |
International
Class: |
C09D 5/16 20060101
C09D005/16; C08G 18/83 20060101 C08G018/83; C08G 18/28 20060101
C08G018/28; C08K 3/04 20060101 C08K003/04; C08K 3/14 20060101
C08K003/14; C08K 3/22 20060101 C08K003/22; C08K 3/34 20060101
C08K003/34; C09D 4/06 20060101 C09D004/06 |
Claims
1. A super wear-resistant self-cleaning coating, comprising a first
elastic topcoat and a second self-cleaning topcoat, wherein the
first elastic topcoat comprises, on the basis of parts by mass,
10-60 parts of a bifunctional polyurethane acrylic resin A, 2-7
parts of an initiator A, 10-60 parts of an acrylate monomer A, and
3-40 parts of an additive A; the second self-cleaning topcoat
comprises, on the basis of parts by mass, 2-30 parts of an acrylic
modified silicone resin having affinity for an inorganic powder,
0.3-3 parts of a high-hardness micropowder particle, 2-20 parts of
a bifunctional polyurethane acrylic resin B, 10-40 parts of a
multifunctional polyurethane acrylic resin, 15-45 parts of an
acrylate monomer B, 2-7 parts of an initiator B and 3-40 parts of
an additive B, wherein the bifunctional polyurethane acrylic resin
A has a soft segment structural unit having a glass transition
temperature of -50.degree.C to 10.degree.C and a content of 40-80%,
the bifunctional polyurethane acrylic resin A is prepared by
polymerizing a diol having a molecular weight of 2000-6000 with an
isocyanate and a monohydroxy acrylate monomer; the acrylate monomer
A is a mixture of a trifunctional monomer and a bifunctional or
monofunctional monomer; wherein the acrylic modified silicone resin
having affinity for an inorganic powder is prepared by a method
comprising the following steps: i) selecting hydroxypolysiloxane to
react with an isocyanate to obtain a silicone prepolymer; ii)
reacting the silicone prepolymer with a monohydroxy acrylate
monomer to prepare an acrylic modified silicone oligomer; iii)
reacting the acrylic modified silicone oligomer with a silane
coupling agent to prepare an acrylic modified silicone resin having
affinity for an inorganic powder; the high-hardness micropowder
particle is a powder with a Moh's hardness of not less than 9, the
bifunctional polyurethane acrylic resin B has a soft segment
structural unit having a glass transition temperature of
-50.degree. C. to 10.degree. C. and a content of 40-80%, the
bifunctional polyurethane acrylic resin B is prepared by
polymerizing a diol having a molecular weight of 2000-6000 with an
isocyanate and a monohydroxy acrylate monomer; the glass transition
temperature of the multifunctional polyurethane acrylic resin is
50-150.degree. C., and the multifunctional polyurethane acrylic
resin is prepared by an end-capping reaction between a
polyisocyanate and a hydroxyl-containing acrylate monomer; and the
acrylate monomer B is a mixture of a multifunctional acrylate
monomer and a bifunctional or monofunctional monomer.
2. The super wear-resistant self-cleaning coating according to
claim 1, wherein the content of the bifunctional polyurethane
acrylic resin A is 15-40 parts, the content of the bifunctional
polyurethane acrylic resin B is 5-10 parts, the diol is one or more
selected from a group consisting of polycaprolactone diols,
polyester diols, dimer acid modified diols, and polytetrahydrofuran
diols; the isocyanate is one or more selected from a group
consisting of toluene diisocyanate, isophorone diisocyanate, and
4,4'-bicyclohexylmethane diisocyanate; the monohydroxy acrylate
monomer is one or more selected from a group consisting of
hydroxyethyl acrylate, hydroxyethyl methacrylate, and hydroxypropyl
acrylate.
3. The super wear-resistant self-cleaning coating according to
claim 1, wherein for the acrylate monomer A, the trifunctional
acrylic monomer is one or more selected from a group consisting of
trimethylolpropane triacrylate and ethoxylated trimethylolpropane
triacrylate; the bifunctional or monofunctional monomer is one or
more selected from a group consisting of hydroxyethyl methacrylate,
hydroxypropyl methacrylate, acryloyl morpholine, 1,6-hexanediol
diacrylate, neopentyl glycol diacrylate, dipropylene glycol
diacrylate, tripropylene glycol diacrylate, and polyethylene glycol
diacrylate.
4. The super wear-resistant self-cleaning coating according to
claim 1, wherein the content of the acrylic modified silicone resin
having affinity for an inorganic powder is 8-14 parts.
5. The super wear-resistant self-cleaning coating according to
claim 3 wherein the high-hardness micropowder particle is one or
more selected from a group consisting of diamond micropowder,
silicon carbide micropowder, and alumina particles; the
high-hardness micropowder particle has a particle size of 1-100
.mu.m.
6. The super wear-resistant self-cleaning coating according to
claim 5, wherein the high-hardness micropowder particle has a
particle size of 5-20 .mu.m.
7. The super wear-resistant self-cleaning coating according to
claim 1, wherein for the multifunctional polyurethane acrylic
resin: the polyisocyanate is one or more selected from a group
consisting of isophorone diisocyanate, 4,4'-dicyclohexylmethane
diisocyanate, HDI dimer, HDI trimer, HDI biuret and IPDI trimer;
the hydroxyl-containing acrylate monomer is one or more selected
from a group consisting of hydroxyethyl acrylate, hydroxyethyl
methacrylate, hydroxypropyl acrylate, pentaerythritol triacrylate,
and dipentaerythritol pentaacrylate; and the content of the
multifunctional polyurethane acrylic resin is 15-30 parts.
8. The super wear-resistant self-cleaning coating according to
claim 1, wherein for the acrylate monomer B: the multifunctional
acrylate monomer is one or more selected from a group consisting of
pentaerythritol triacrylate, pentaerythritol tetraacrylate,
trimethylolpropane tetraacrylate, and dipentaerythritol
hexaacrylate; the bifunctional or monofunctional monomer is one or
more selected from a group consisting of dipropylene glycol
diacrylate, neopentyl glycol diacrylate, and acryloyl
morpholine.
9. The super wear-resistant self-cleaning coating according to
claim 1, wherein both the initiator A and the initiator B are
photoinitiators; the additive A and the additive B both comprise a
dispersant, a defoamer, a leveling agent, a pigment, a matting
powder, a flame retardant and a stabilizer, wherein the matting
powder is an inorganic or organic matting powder.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application is a continuation of International
Application No. PCT/CN2019/120504, filed on Nov. 25, 2019, the
entire content of which is incorporated herein by reference.
TECHNICAL FIELD
[0002] The invention relates to the technical field of building
decoration materials, in particular to a super wear-resistant
self-cleaning coating and a method for preparing the same.
BACKGROUND
[0003] Flooring materials (including plastic flooring, bamboo and
wood flooring, composite flooring, etc.) during use are subject to
repeated scratches caused by external forces to cause surface
damage, such as reduced aesthetics, reduced moisture and water
resistance, reduced dirt resistance, and becoming not easy to
clean, resulting in great waste of material resources and human
resources. Therefore, it is of great significance to develop a
coating with super wear resistance and long-lasting
self-cleanability. To increase wear resistance, currently available
coatings on the market mostly introduce high-hardness inorganic
materials (silica powder, ceramic powder, alumina, etc.) to organic
coatings to achieve wear resistance and surface scratch resistance
by using the high hardness of inorganic materials. The inorganic
material and the organic coatings cannot bond together tightly
because there is just a simple physical mixing of them. In
addition, the common inorganic materials used in the coatings have
limited hardness (Mohs hardness of less than 9), resulting in
limited wear resistance, scratch resistance and durability of the
coating. The coatings on the market are often endowed with dirt
resistance by incorporating low surface energy substances (silicone
resin, fluorocarbon resin, etc.). The low surface energy substance
migrates to the surface of the coating to form a hydrophobic layer
with low surface tension, so that contaminants are not easy to wet
the coating surface, thereby achieving the purpose of easy
cleaning. However, this coating does not have durable dirt
resistance, because the content of low surface energy substances
gradually decreases after repeated washing until the stain
resistance is completely lost.
SUMMARY
[0004] The technical problem to be solved by the present invention
is to overcome the shortcomings of the prior art, to provide a
super wear-resistant self-cleaning coating and a method for
preparing the same. The coating composed of a first elastic topcoat
and a second self-cleaning topcoat has super wear resistance,
scratch resistance, and surface wear resistance, as well as
long-lasting self-cleanability, can be widely used in the coating
decoration of public places and home furnishing materials and the
coating decoration of other places having special requirements for
wear resistance and durability.
[0005] In order to solve the above technical problem, the technical
solution proposed by the present invention is: a super
wear-resistant self-cleaning coating, including a first elastic
topcoat and a second self-cleaning topcoat, wherein the first
elastic topcoat comprises, on the basis of parts by mass, 10-60
parts of a bifunctional polyurethane acrylic resin A, 2-7 parts of
an initiator A, 10-60 parts of an acrylate monomer A, and 3-40
parts of an additive A; the second self-cleaning topcoat comprises,
on the basis of parts by mass, 2-30 parts of an acrylic modified
silicone resin having affinity for an inorganic powder, 0.3-3 parts
of a high-hardness micropowder particle, 2-20 parts of a
bifunctional polyurethane acrylic resin B, 10-40 parts of a
multifunctional polyurethane acrylic resin, 15-45 parts of an
acrylate monomer B, 2-7 parts of an initiator B and 3-40 parts of
an additive B.
[0006] Further, the bifunctional polyurethane acrylic resin A has a
soft segment structural unit having a glass transition temperature
of -50.degree. C. to 10.degree. C. and a content of 40-80%, the
bifunctional polyurethane acrylic resin A is prepared by
polymerizing a diol having a molecular weight of 2000-6000 with an
isocyanate and a monohydroxy acrylate monomer, the diol is one or
more of polycaprolactone diols, polyester diols, dimer acid
modified diols, and polytetrahydrofuran diols; the isocyanate is
one or more of toluene diisocyanate, isophorone diisocyanate, and
4,4'-bicyclohexylmethane diisocyanate; the monohydroxy acrylate
monomer is one or more of hydroxyethyl acrylate, hydroxyethyl
methacrylate, and hydroxypropyl acrylate; and the content of the
bifunctional polyurethane acrylic resin A is 15-40 parts.
[0007] Further, the acrylate monomer A is a mixture of a
trifunctional monomer and a bifunctional or monofunctional monomer,
wherein the mass fraction of the trifunctional acrylic monomer is
1-20%, and preferably 5-10%; the mass fraction of the bifunctional
or monofunctional monomer is 10-50%, and preferably 15-40%, the
trifunctional acrylic monomer is one or more of trimethylolpropane
triacrylate and ethoxylated trimethylolpropane triacrylate; the
bifunctional or monofunctional monomer is one or more of
hydroxyethyl methacrylate, hydroxypropyl methacrylate, acryloyl
morpholine, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate,
dipropylene glycol diacrylate, tripropylene glycol diacrylate, and
polyethylene glycol diacrylate.
[0008] Further, the acrylic modified silicone resin having affinity
for an inorganic powder is prepared by a method comprising the
following steps:
[0009] i) selecting hydroxypolysiloxane to react with an isocyanate
to obtain a silicone prepolymer;
[0010] ii) reacting the silicone prepolymer with a monohydroxy
acrylate monomer to prepare an acrylic modified silicone
oligomer;
[0011] iii) reacting the acrylic modified silicone oligomer with a
silane coupling agent to prepare an acrylic modified silicone resin
having affinity for an inorganic powder;
[0012] the content of the acrylic modified silicone resin having
affinity for an inorganic powder is 8-14 parts.
[0013] Further, the high-hardness micropowder particle is a powder
with a Moh's hardness of not less than 9, and the high-hardness
micropowder particle is one or more of diamond micropowder, silicon
carbide micropowder, and alumina particles; a particle size of the
high-hardness micropowder particle is 1-100 .mu.m, and preferably
5-20 .mu.m.
[0014] Further, the bifunctional polyurethane acrylic resin B has a
soft segment structural unit having a glass transition temperature
of -50.degree. C. to 10.degree. C. and a content of 40-80%, the
bifunctional polyurethane acrylic resin B is prepared by
polymerizing a diol having a molecular weight of 2000-6000 with an
isocyanate and a monohydroxy acrylate monomer, the diol is one or
more of polycaprolactone diols, polyester diols, dimer acid
modified diols, and polytetrahydrofuran diols; the isocyanate is
one or more of toluene diisocyanate, isophorone diisocyanate, and
4,4'-bicyclohexylmethane diisocyanate; the monohydroxy acrylate
monomer is one or more of hydroxyethyl acrylate, hydroxyethyl
methacrylate, and hydroxypropyl acrylate; and the content of the
bifunctional polyurethane acrylic resin B is 5-10 parts.
[0015] Further, the glass transition temperature of the
multifunctional polyurethane acrylic resin is 50-150.degree. C.,
and the multifunctional polyurethane acrylic resin is prepared by
an end-capping reaction between a polyisocyanate and a
hydroxyl-containing acrylate monomer; the polyisocyanate is one or
more of isophorone diisocyanate, 4,4'-dicyclohexylmethane
diisocyanate, HDI dimer, HDI trimer, HDI biuret and IPDI trimer;
the hydroxyl-containing acrylate monomer is one or more of
hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl
acrylate, pentaerythritol triacrylate, and dipentaerythritol
pentaacrylate; and the content of the multifunctional polyurethane
acrylic resin is 15-30 parts.
[0016] Further, the glass transition temperature of the homopolymer
of the acrylate monomer B is 50-150.degree. C., and preferably
80-150.degree. C., the acrylate monomer B is a mixture of a
multifunctional acrylate monomer and a bifunctional or
monofunctional monomer, the mass fraction of the multifunctional
acrylate monomer is 5-15%, and the mass fraction of the
bifunctional or monofunctional monomer is 10-30%; the
multifunctional acrylate monomer is one or more of pentaerythritol
triacrylate, pentaerythritol tetraacrylate, trimethylolpropane
tetraacrylate, and dipentaerythritol hexaacrylate; the bifunctional
or monofunctional monomer is one or more of dipropylene glycol
diacrylate, neopentyl glycol diacrylate, and acryloyl
morpholine.
[0017] Further, both the initiator A and the initiator B are
photoinitiators; the additive A and the additive B both comprise a
dispersant, a defoamer, a leveling agent, a pigment, a matting
powder, a flame retardant and a stabilizer, wherein the matting
powder is an inorganic or organic matting powder.
[0018] A method for preparing a super wear-resistant self-cleaning
coating, comprising the following steps:
[0019] 1) preparation of a first elastic topcoat: dispersing at
high speed or grinding a bifunctional polyurethane acrylic resin,
an initiator A, an acrylate monomer A and an additive A in suitable
equipment to the required fineness, and then applying the resultant
mixture onto a substrate to obtain the first elastic topcoat
coating by radiation curing using one or more of UV, LED, and
EB;
[0020] 2) preparation of a second self-cleaning topcoat: grinding
an acrylic modified silicone resin having affinity for an inorganic
powder and a high-hardness micropowder particle to obtain a
high-hardness particle well-wrapped by silicone; dispersing at high
speed or grinding the high-hardness particle well-wrapped by
silicone together with a bifunctional polyurethane acrylic resin B,
a multifunctional polyurethane acrylic resin, an acrylate monomer
B, an initiator B and an additive B in suitable equipment to the
required fineness, and then applying the resultant mixture onto the
first elastic topcoat coating to obtain a super wear-resistant
self-cleaning coating by radiation curing using one or more of UV,
LED, and EB.
[0021] Compared with the prior art, the advantages of the present
invention are as follows:
[0022] 1. The first topcoat of the present invention uses an
elastic system, with the bifunctional polyurethane acrylic resin A
having a low glass transition temperature and a high flexibility as
the first coating film structure; when the coating surface is
scratched, the coating film will be displaced in the microscopic
morphology, so as to buffer the applied force, and significantly
improve the wear resistance and scratch resistance of the coating
surface;
[0023] 2. The second topcoat coating of the present invention is
designed with a special formula, where a multifunctional
polyurethane acrylic resin and acrylate monomer B having a high
glass transition temperature and a high hardness are combined with
a small amount of a bifunctional urethane acrylic resin B having a
low glass transition temperature and a high flexibility to form a
block polymer structure with a hard segment as the main component
and a soft segment as the secondary component in the molecular
morphology. While achieving high cross-linking and high hardness,
the second topcoat coating has improved wear resistance and scratch
resistance because the bifunctional polyurethane acrylic resin B
having a low glass transition temperature and a high flexibility
provides cushioning effect when the coating is subjected to
external stress.
[0024] 3. In the present invention, after the acrylic-modified
silicone resin is modified with a silane coupling agent, the
pigmentophilic siloxane group can interact with the
hydrogen-containing active group in the inorganic powder to form a
stable chemical bond, which, together with other raw materials,
provides a high-crosslinking and high-hardness coating having a
long-lasting coating surface with a low surface energy, thereby
significantly reducing the external friction and damage in the
microscopic morphology;
[0025] 4. In the present invention, the acrylic modified organic
silicon resin having affinity for an inorganic powder, together
with the inorganic powder (especially matting powder) reduces the
surface tension of the powder through wrapping effect, forming a
layer of hydrophobic dirt-resistant layer to make the product have
anti-fouling and self-cleaning properties;
[0026] 5. In the present invention, a silicone resin having both
radiation curing activity and inorganic powder affinity is used to
wrap the high-hardness micropowder particles. The high-hardness
micropowder particles provide super wear resistance. The silicone
resin on the one hand is cross-linked with the organic coating to
provide long-lasting self-cleanability, and on the one hand, it
wraps the high-hardness micropowder particles, so that the
inorganic high-hardness micropowder particles are firmly bonded to
the organic coating, providing long-lasting wear resistance and
scratch resistance;
[0027] 6. The super wear-resistant self-cleaning coating prepared
by the present invention can be widely used in the coating of
flooring in public places, home furnishing flooring and the coating
of other places that have special requirements for wear resistance
and durability (such as mobile phones, faucets, tables, chairs,
flooring, etc.).
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to facilitate understanding of the present
invention, the present invention will be described more fully and
meticulously in combination with preferred examples below, but the
scope of protection of the present invention is not limited to the
following specific examples.
Example 1
[0029] A super wear-resistant self-cleaning coating, including a
first elastic topcoat and a second self-cleaning topcoat, wherein
the first elastic topcoat comprises, on the basis of parts by mass,
20 parts of a bifunctional polyurethane acrylic resin A having a
glass transition temperature of -50.degree. C. to 10.degree. C., 5
parts of an initiator A, 50 parts of an acrylate monomer A, and 25
parts of an additive A; the second self-cleaning topcoat comprises,
on the basis of parts by mass, 4 parts of an acrylic modified
silicone resin having affinity for an inorganic powder, 1 part of a
high-hardness micropowder particle, 4 parts of a bifunctional
polyurethane acrylic resin B having a glass transition temperature
of -50.degree. C. to -10.degree. C., 30 parts of a multifunctional
polyurethane acrylic resin having a glass transition temperature of
50-150.degree. C., 35 parts of an acrylate monomer B having a glass
transition temperature of 50-150.degree. C., 4 parts of an
initiator B and 22 parts of an additive B.
[0030] In this example, the bifunctional polyurethane acrylic resin
A is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate and a monohydroxy acrylate monomer. The
diol is polycaprolactone diol; the isocyanate is toluene
diisocyanate; and the monohydroxy acrylate monomer is hydroxyethyl
acrylate.
[0031] In this example, the initiator A is 1-hydroxycyclohexyl
phenyl ketone (184). The acrylate monomer A is a mixture of 7 parts
of ethoxylated trimethylolpropane triacrylate, 10 parts of
hydroxyethyl methacrylate, and 33 parts of tripropylene glycol
diacrylate.
[0032] In this example, the additive A is a mixture of 4 parts of a
dispersant, 15 parts of a silica matting powder, 0.5 parts of a
defoamer, 0.5 parts of a wetting agent, and 5 parts of a silicon
micropowder.
[0033] In this example, the acrylate monomer A is a mixture of a
trifunctional monomer with a bifunctional or monofunctional
monomer, wherein the content of the trifunctional acrylic monomers
is 3%; the content of the bifunctional or monofunctional monomer is
20%, the trifunctional acrylic monomer is trimethylolpropane
triacrylate; and the bifunctional or monofunctional monomer is
hydroxyethyl methacrylate.
[0034] In this example, the preparation method of the acrylic
modified silicone resin having affinity for an inorganic powder
includes the following steps:
[0035] i) selecting hydroxypolysiloxane to react with an isocyanate
to obtain a silicone prepolymer;
[0036] ii) reacting the silicone prepolymer with a monohydroxy
acrylate monomer to prepare an acrylic modified silicone
oligomer;
[0037] iii) reacting the acrylic modified silicone oligomer with a
silane coupling agent to prepare an acrylic modified silicone resin
having affinity for an inorganic powder;
[0038] In this example, the high-hardness micropowder particle is a
diamond micropowder with a particle size of 50 .mu.m.
[0039] In this example, the bifunctional polyurethane acrylic resin
B is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate, and a monohydroxy acrylate monomer. The
diol is polycaprolactone diol; and the monohydroxy acrylate monomer
is hydroxyethyl acrylate.
[0040] In this example, the multifunctional urethane acrylic resin
is prepared by an end-capping reaction between a polyisocyanate and
a hydroxyl-containing acrylate monomer. The polyisocyanate is
isophorone diisocyanate; and the hydroxyl-containing acrylate
monomer is hydroxyethyl acrylate.
[0041] In this example, the acrylate monomer B is a mixture of, on
the basis of parts by mass, 6 parts of dipentaerythritol
hexaacrylate, 10 parts of acryloyl morpholine, and 19 parts of
dipropylene glycol diacrylate.
[0042] In this example, the initiator B is a mixture of, on the
basis of parts by mass, 3 parts of 1-hydroxycyclohexyl phenyl
ketone (184) and 1 part of benzophenone (BP).
[0043] In this example, the additive B is a mixture of, on the
basis of parts by mass, 4 parts of a dispersant, 14 parts of a
silica matting powder, 0.5 parts of a defoamer, 0.5 parts of a
wetting agent, and 3 parts of a silicon micropowder.
[0044] In this example, both the initiator A and the initiator B
are photoinitiators which may be any photoinitiator disclosed in
the prior art in this field.
[0045] In this example, both the additive A and the additive B
include a dispersant, a defoamer, a leveling agent, a pigment, a
matting powder, a flame retardant and a stabilizer, wherein the
matting powder is an inorganic or organic matting powder, and
particularly the matting powder is an inorganic matting powder. The
above-mentioned components may be any corresponding components
disclosed in the prior art in the field.
[0046] A method for preparing a super wear-resistant self-cleaning
coating, including the following steps:
[0047] 1) preparation of a first elastic topcoat: dispersing at
high speed a bifunctional polyurethane acrylic resin having a glass
transition temperature of -50.degree. C. to 10.degree. C., an
initiator A, an acrylate monomer A and an additive A in suitable
equipment to the required fineness, and then applying the resultant
mixture onto a substrate to obtain the first elastic topcoat
coating by radiation curing using UV;
[0048] 2) preparation of a second self-cleaning topcoat: dispersing
an acrylic modified silicone resin having affinity for an inorganic
powder and a high-hardness micropowder particle to obtain a
high-hardness particle well-wrapped by silicone; dispersing at high
speed the high-hardness particle well-wrapped by silicone together
with a bifunctional polyurethane acrylic resin B having a glass
transition temperature of -50.degree. C. to 10.degree. C., a
multifunctional polyurethane acrylic resin having a glass
transition temperature of 50-100.degree. C., an acrylate monomer B
having a glass transition temperature of 50-150.degree. C., an
initiator B and an additive B in suitable equipment to the required
fineness, and then applying the resultant mixture onto the first
elastic topcoat coating to obtain a super wear-resistant
self-cleaning coating by radiation curing using UV.
Example 2
[0049] A super wear-resistant self-cleaning coating, including a
first elastic topcoat and a second self-cleaning topcoat, wherein
the first elastic topcoat comprises, on the basis of parts by mass,
30 parts of a bifunctional polyurethane acrylic resin A having a
glass transition temperature of -50.degree. C. to 10.degree. C.,
4.5 parts of an initiator A, 30.5 parts of an acrylate monomer A,
and 35 parts of an additive A; the second self-cleaning topcoat
comprises, on the basis of parts by mass, 8 parts of an acrylic
modified silicone resin having affinity for an inorganic powder,
0.3 parts of a high-hardness micropowder particle, 3 parts of a
bifunctional polyurethane acrylic resin B having a glass transition
temperature of -50.degree. C. to -10.degree. C., 40 parts of a
multifunctional polyurethane acrylic resin having a glass
transition temperature of 50-150.degree. C., 30.7 parts of an
acrylate monomer B having a glass transition temperature of
50-150.degree. C., 3 parts of an initiator B and 15 parts of an
additive B.
[0050] In this example, the bifunctional polyurethane acrylic resin
A is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate and a monohydroxy acrylate monomer. The
diol is a mixture of polyester diol and dimer acid modified diol;
the isocyanate is isophorone diisocyanate; and the monohydroxy
acrylate monomer is a mixture of hydroxyethyl acrylate,
hydroxyethyl methacrylate, and hydroxypropyl acrylate.
[0051] In this example, the acrylate monomer A is a mixture of a
trifunctional monomer with a bifunctional or monofunctional
monomer, wherein the trifunctional acrylic monomer is
trimethylolpropane triacrylate with a content of 5%; the content of
the bifunctional or monofunctional monomer is 25.5%, and the
bifunctional or monofunctional monomer is a mixture of 5 parts of
neopentyl glycol diacrylate, 15.5 parts of dipropylene glycol
diacrylate, and 5 parts of hydroxyethyl methacrylate.
[0052] In this example, the additive A is a mixture of, on the
basis of parts by mass, 5 parts of a dispersant, 12 parts of a
silica matting powder, 0.5 parts of a defoamer, 0.2 parts of a
leveling agent, 0.5 parts of a wetting agent, and 12.3 parts of a
flame retardant.
[0053] In this example, the preparation method of the acrylic
modified silicone resin having affinity for an inorganic powder
includes the following steps:
[0054] i) selecting hydroxypolysiloxane to react with an isocyanate
to obtain a silicone prepolymer;
[0055] ii) reacting the silicone prepolymer with a monohydroxy
acrylate monomer to prepare an acrylic modified silicone
oligomer;
[0056] iii) reacting the acrylic modified silicone oligomer with a
silane coupling agent to prepare an acrylic modified silicone resin
having affinity for an inorganic powder;
[0057] In this example, the high-hardness micropowder particle is a
diamond micropowder with a particle size of 20 .mu.m.
[0058] In this example, the bifunctional polyurethane acrylic resin
B is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate, and a monohydroxy acrylate monomer. The
diol is dimer acid modified glycol; the isocyanate is
4,4'-dicyclohexylmethane diisocyanate; and the monohydroxy acrylate
monomer is a mixture of hydroxyethyl methacrylate and hydroxypropyl
acrylate.
[0059] In this example, the multifunctional urethane acrylic resin
is prepared by an end-capping reaction between a polyisocyanate and
a hydroxyl-containing acrylate monomer. The polyisocyanate is a
mixture of 4,4'-dicyclohexylmethane diisocyanate, HDI dimer, HDI
trimer and HDI biuret; and the hydroxyl-containing acrylate monomer
is hydroxyethyl methacrylate.
[0060] In this example, the acrylate monomer B is a mixture of, on
the basis of parts by mass, 5 parts of pentaerythritol triacrylate,
5 parts of trimethylolpropane tetraacrylate, 4 parts of neopentyl
glycol diacrylate, and 16.7 parts of dipropylene glycol
diacrylate.
[0061] In this example, the initiator B is a mixture of, on the
basis of parts by mass, 2 parts of 1-hydroxycyclohexyl phenyl
ketone (184) and 1 part of (2,4,6-trimethylbenzoyl)
diphenylphosphine oxide (TPO).
[0062] In this example, the additive B is a mixture of, on the
basis of parts by mass,3 parts of a dispersant, 10.5 parts of a
silica matting powder, 0.5 parts of a defoamer, 0.5 parts of a
wetting agent, and 0.5 parts of a leveling agent.
[0063] A method for preparing a super wear-resistant self-cleaning
coating, including the following steps:
[0064] 1) preparation of a first elastic topcoat: dispersing at
high speed a bifunctional polyurethane acrylic resin having a glass
transition temperature of -50.degree. C. to 10.degree. C., an
initiator A, an acrylate monomer A and an additive A in suitable
equipment to the required fineness, and then applying the resultant
mixture onto a substrate to obtain the first elastic topcoat
coating by radiation curing using LED;
[0065] 2) preparation of a second self-cleaning topcoat: dispersing
an acrylic modified silicone resin having affinity for an inorganic
powder and a high-hardness micropowder particle to obtain a
high-hardness particle well-wrapped by silicone; dispersing at high
speed the high-hardness particle well-wrapped by silicone together
with a bifunctional polyurethane acrylic resin B having a glass
transition temperature of -50.degree. C. to 10.degree. C., a
multifunctional polyurethane acrylic resin having a glass
transition temperature of 50-100.degree. C., an acrylate monomer B
having a glass transition temperature of 50-150.degree. C., an
initiator B and an additive B in suitable equipment to the required
fineness, and then applying the resultant mixture onto the first
elastic topcoat coating to obtain a super wear-resistant
self-cleaning coating by radiation curing using EB.
Example 3
[0066] A super wear-resistant self-cleaning coating, including a
first elastic topcoat and a second self-cleaning topcoat, wherein
the first elastic topcoat comprises, on the basis of parts by mass,
40 parts of a bifunctional polyurethane acrylic resin A having a
glass transition temperature of -50.degree. C. to 10.degree. C., 6
parts of an initiator A, 39 parts of an acrylate monomer A, and 15
parts of an additive A; the second self-cleaning topcoat comprises,
on the basis of parts by mass, 20 parts of an acrylic modified
silicone resin having affinity for an inorganic powder, 2 part of a
high-hardness micropowder particle, 10 parts of a bifunctional
polyurethane acrylic resin B having a glass transition temperature
of -50.degree. C. to -10.degree. C., 30 parts of a multifunctional
polyurethane acrylic resin having a glass transition temperature of
50-150.degree. C., 31 parts of an acrylate monomer B having a glass
transition temperature of 50-150.degree. C., 2 parts of an
initiator B and 5 parts of an additive B.
[0067] In this example, the bifunctional polyurethane acrylic resin
A is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate and a monohydroxy acrylate monomer. The
diol is polytetrahydrofuran diol; the isocyanate is a mixture of
toluene diisocyanate, isophorone diisocyanate and
4,4'-dicyclohexylmethane diisocyanate; and the monohydroxy acrylate
monomer is a mixture of hydroxyethyl acrylate and hydroxypropyl
acrylate.
[0068] In this example, the initiator A is a mixture of, on the
basis of parts by mass, 3 parts of (2,4,6-trimethylbenzoyl)
diphenylphosphine oxide (TPO) and 3 parts of 1-hydroxycyclohexyl
phenyl ketone (184).
[0069] In this example, the acrylate monomer A is a mixture of, on
the basis of parts by mass, 5 parts of trimethylolpropane
triacrylate and 34 parts of acryloyl morpholine.
[0070] In this example, the additive A is a mixture of, on the
basis of parts by mass, 2.7 parts of a dispersant, 12 parts of a
polyurea matting powder, and 0.3 parts of a defoamer.
[0071] In this example, the acrylate monomer A is a mixture of a
trifunctional monomer with a bifunctional or monofunctional
monomer, wherein the content of the trifunctional acrylic monomers
is 15%; the content of the bifunctional or monofunctional monomer
is 30%, the trifunctional acrylic monomer is ethoxylated
trimethylolpropane triacrylate; and the bifunctional or
monofunctional monomer is a mixture of 1,6-hexanediol diacrylate
and neopentyl glycol diacrylate.
[0072] In this example, the preparation method of the acrylic
modified silicone resin having affinity for an inorganic powder
includes the following steps:
[0073] i) selecting hydroxypolysiloxane to react with an isocyanate
to obtain a silicone prepolymer;
[0074] ii) reacting the silicone prepolymer with a monohydroxy
acrylate monomer to prepare an acrylic modified silicone
oligomer;
[0075] iii) reacting the acrylic modified silicone oligomer with a
silane coupling agent to prepare an acrylic modified silicone resin
having affinity for an inorganic powder;
[0076] In this example, the high-hardness micropowder particle is a
mixture of, on the basis of parts by mass, 1 part of diamond
micropowder with a particle size of 10 .mu.m and 1 part of a
silicon carbide micropowder with a particle size of 60 .mu.m.
[0077] In this example, the bifunctional polyurethane acrylic resin
B is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate, and a monohydroxy acrylate monomer. The
diol is a mixture of polyester diol and dimer acid modified diol;
the isocyanate is 4,4'-dicyclohexylmethane diisocyanate; and the
monohydroxy acrylate monomer is a mixture of hydroxyethyl
methacrylate and hydroxypropyl acrylate.
[0078] In this example, the multifunctional urethane acrylic resin
is prepared by an end-capping reaction between a polyisocyanate and
a hydroxyl-containing acrylate monomer. The polyisocyanate is IPDI
trimer; and the hydroxyl-containing acrylate monomer is a mixture
of pentaerythritol triacrylate and dipentaerythritol
pentaacrylate.
[0079] In this example, the acrylate monomer B is a mixture of, on
the basis of parts by mass, 10 parts of pentaerythritol triacrylate
and 21 parts of acryloyl morpholine.
[0080] In this example, the initiator B is
phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide (819).
[0081] In this example, the additive B is a mixture of, on the
basis of parts by mass, 4.5 parts of a silicon micropowder, 0.2
parts of a defoamer, and 0.3 parts of a leveling agent.
[0082] A method for preparing a super wear-resistant self-cleaning
coating, including the following steps:
[0083] 1) preparation of a first elastic topcoat: dispersing at
high speed a bifunctional polyurethane acrylic resin having a glass
transition temperature of -50.degree. C. to 10.degree. C., an
initiator A, an acrylate monomer A and an additive A in suitable
equipment to the required fineness, and then applying the resultant
mixture onto a substrate to obtain the first elastic topcoat
coating by radiation curing using a combination of UV and LED;
[0084] 2) preparation of a second self-cleaning topcoat: dispersing
an acrylic modified silicone resin having affinity for an inorganic
powder and a high-hardness micropowder particle to obtain a
high-hardness particle well-wrapped by silicone; dispersing at high
speed the high-hardness particle well-wrapped by silicone together
with a bifunctional polyurethane acrylic resin B having a glass
transition temperature of -50.degree. C. to 10.degree. C., a
multifunctional polyurethane acrylic resin having a glass
transition temperature of 50-100.degree. C., an acrylate monomer B
having a glass transition temperature of 50-150.degree. C., an
initiator B and an additive B in suitable equipment to the required
fineness, and then applying the resultant mixture onto the first
elastic topcoat coating to obtain a super wear-resistant
self-cleaning coating by radiation curing using a combination of
LED and EB.
Example 4
[0085] A super wear-resistant self-cleaning coating, including a
first elastic topcoat and a second self-cleaning topcoat, wherein
the first elastic topcoat comprises, on the basis of parts by mass,
60 parts of a bifunctional polyurethane acrylic resin A having a
glass transition temperature of -50.degree. C. to 10.degree. C., 2
parts of an initiator A, 28 parts of an acrylate monomer A, and 10
parts of an additive A; the second self-cleaning topcoat comprises,
on the basis of parts by mass, 15 parts of an acrylic modified
silicone resin having affinity for an inorganic powder, 3 part of a
high-hardness micropowder particle, 13 parts of a bifunctional
polyurethane acrylic resin B having a glass transition temperature
of -30.degree. C. to -10.degree. C., 20 parts of a multifunctional
polyurethane acrylic resin having a glass transition temperature of
50-150.degree. C., 17 parts of an acrylate monomer B having a glass
transition temperature of 50-150.degree. C., 5 parts of an
initiator B and 30 parts of an additive B.
[0086] In this example, the bifunctional polyurethane acrylic resin
A is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate and a monohydroxy acrylate monomer. The
diol is dimer acid modified diol; the isocyanate is a mixture of
toluene diisocyanate, isophorone diisocyanate and
4,4'-dicyclohexylmethane diisocyanate; and the monohydroxy acrylate
monomer is hydroxyethyl methacrylate.
[0087] In this example, the initiator A is
phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide (819).
[0088] In this example, the acrylate monomer A is a mixture of, on
the basis of parts by mass, 8 parts of ethoxylated
trimethylolpropane triacrylate, 9 parts of 1,6-hexanediol
diacrylate, and 11 parts of hydroxypropyl methacrylate.
[0089] In this example, the additive A is a mixture of, on the
basis of parts by mass, 2 parts of a dispersant, 7.5 parts of a
silica matting powder, and 0.5 parts of a defoamer.
[0090] In this example, the preparation method of the acrylic
modified silicone resin having affinity for an inorganic powder
includes the following steps:
[0091] i) selecting hydroxypolysiloxane to react with an isocyanate
to obtain a silicone prepolymer;
[0092] ii) reacting the silicone prepolymer with a monohydroxy
acrylate monomer to prepare an acrylic modified silicone
oligomer;
[0093] iii) reacting the acrylic modified silicone oligomer with a
silane coupling agent to prepare an acrylic modified silicone resin
having affinity for an inorganic powder;
[0094] In this example, the high-hardness micropowder particle is a
mixture of, on the basis of parts by mass, 1 part of diamond
micropowder with a particle size of 10 .mu.m, 1 part of a silicon
carbide micropowder with a particle size of 30 .mu.m, and 1 part of
alumina with a particle size of 30 .mu.m.
[0095] In this example, the bifunctional polyurethane acrylic resin
B is prepared by polymerizing a diol with a molecular weight of
2000-6000, an isocyanate, and a monohydroxy acrylate monomer. The
diol is polyester diol; the isocyanate is isophorone diisocyanate;
and the monohydroxy acrylate monomer is hydroxyethyl
methacrylate.
[0096] In this example, the multifunctional urethane acrylic resin
is prepared by an end-capping reaction between a polyisocyanate and
a hydroxyl-containing acrylate monomer. The polyisocyanate is
4,4'-dicyclohexylmethane diisocyanate; and the hydroxyl-containing
acrylate monomer is hydroxypropyl acrylate.
[0097] In this example, the acrylate monomer B is a mixture of, on
the basis of parts by mass, 5 parts of trimethylolpropane
tetraacrylate, 5 parts of neopentyl glycol diacrylate, and 7 parts
of acryloyl morpholine.
[0098] In this example, the initiator B is a mixture of, on the
basis of parts by mass, 1 part of phenylbis(2,4,6-trimethylbenzoyl)
phosphine oxide (819), 2 parts of
2-hydroxy-2-methyl-1-phenyl-1-acetone (1173), 1 part of
4-chlorobenzophenone, and 1 part of active amine.
[0099] In this example, the additive B is a mixture of, on the
basis of parts by mass, 5 parts of a dispersant, 15 parts of a
silica matting powder, 8.5 parts of a wear-resistant powder, 0.5
parts of a defoamer, 0.5 parts of a wetting agent, and 0.5 parts of
a leveling agent.
[0100] A method for preparing a super wear-resistant self-cleaning
coating, including the following steps:
[0101] 1) preparation of a first elastic topcoat: dispersing at
high speed a bifunctional polyurethane acrylic resin having a glass
transition temperature of -50.degree. C. to 10.degree. C., an
initiator A, an acrylate monomer A and an additive A in suitable
equipment to the required fineness, and then applying the resultant
mixture onto a substrate to obtain the first elastic topcoat
coating by radiation curing using a combination of UV and EB;
[0102] 2) preparation of a second self-cleaning topcoat: dispersing
an acrylic modified silicone resin having affinity for an inorganic
powder and a high-hardness micropowder particle to obtain a
high-hardness particle well-wrapped by silicone; dispersing at high
speed the high-hardness particle well-wrapped by silicone together
with a bifunctional polyurethane acrylic resin B having a glass
transition temperature of -50.degree. C. to 10.degree. C., a
multifunctional polyurethane acrylic resin having a glass
transition temperature of 50-100.degree. C., an acrylate monomer B
having a glass transition temperature of 50-150.degree. C., an
initiator B and an additive B in suitable equipment to the required
fineness, and then applying the resultant mixture onto the first
elastic topcoat coating to obtain a super wear-resistant
self-cleaning coating by radiation curing using a combination of UV
and EB.
* * * * *