U.S. patent application number 11/886560 was filed with the patent office on 2009-01-29 for light-fast dyeings on bicomponent fibers.
Invention is credited to Rino Marazzi, Helmut Sieber.
Application Number | 20090025151 11/886560 |
Document ID | / |
Family ID | 35079367 |
Filed Date | 2009-01-29 |
United States Patent
Application |
20090025151 |
Kind Code |
A1 |
Marazzi; Rino ; et
al. |
January 29, 2009 |
Light-Fast Dyeings on Bicomponent Fibers
Abstract
Process for improving the light-fastness of dyeings on
multicomponent fibres composed of a thermodynamically compatible
polyolefin and polyamide with disperse dyes characterized in that
they are subjected to a treatment with benzotriazole
derivatives.
Inventors: |
Marazzi; Rino; (Pratteln,
CH) ; Sieber; Helmut; (Rheinfelden, DE) |
Correspondence
Address: |
CLARIANT CORPORATION;INTELLECTUAL PROPERTY DEPARTMENT
4000 MONROE ROAD
CHARLOTTE
NC
28205
US
|
Family ID: |
35079367 |
Appl. No.: |
11/886560 |
Filed: |
March 14, 2006 |
PCT Filed: |
March 14, 2006 |
PCT NO: |
PCT/EP2006/060718 |
371 Date: |
September 17, 2007 |
Current U.S.
Class: |
8/442 |
Current CPC
Class: |
D06P 3/794 20130101;
D06P 3/26 20130101; D06P 3/004 20130101; D06P 3/8204 20130101; D06P
3/79 20130101; D06P 1/6426 20130101; D06P 3/8233 20130101; D06P
3/24 20130101 |
Class at
Publication: |
8/442 |
International
Class: |
D06P 5/06 20060101
D06P005/06 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 18, 2005 |
EP |
05102203.6 |
Claims
1. A process for improving the light-fastness of a dispersed dyed
multicomponent fiber, wherein the disperse dyed multicomponent
fiber is composed of a thermodynamically compatible polyolefin and
polyamide, comprising the step of treating the multicomponent fiber
with at least one benzotriazole derivative.
2. A process according to claim 1, wherein the at least one
benzotriazole derivative is of the formula (I) ##STR00014## wherein
R.sub.1 is a halogen atom, R.sub.2 is a C.sub.1 to C.sub.6 alkyl,
and R.sub.3 is a C.sub.1 to C.sub.6 alkyl.
3. A process according to claim 1, wherein the multicomponent fiber
is composed of a thermodynamically compatible polypropylene,
modified PA and polyamide.
4. A process according to claim 1, wherein the multicomponent fiber
consists of a core of a first polymer, and the core is sheathed by
a second polymer.
5. A process according to claim 1, wherein the at least one
benzotriazole derivative is used in an amount of 0.01 to 20 percent
by weight based on the dry weight.
6. A process according to claim 1, wherein the disperse dyed
multicomponent fiber is dyed with at least one disperse dye of the
formulae (1) ##STR00015## wherein R.sub.4 and R'.sub.4 are
independently a phenyl group or a phenyl group substituted by
halogen, CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3,
--OCH.sub.2CH.sub.3 or --OH, or the formulae (2), (3) or (4)
##STR00016## wherein R.sub.5, R'.sub.5, and R''.sub.5 are
independently halogen, a phenyl group or a phenyl group substituted
by halogen, --CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3,
--OCH.sub.2CH.sub.3 or --OH, or the formulae (5) ##STR00017##
wherein R.sub.6 is halogen, a phenyl group or a phenyl group
substituted by halogen, --CH.sub.3, --CH.sub.2CH.sub.3,
--OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or a phenyl group or a
phenoxy group substituted by halogen, --CH.sub.2CH.sub.3,
--OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, R.sub.7 is a phenyl group
or a phenyl group substituted by halogen, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH,
R.sub.8 is --NH.sub.2 or --NHR.sub.9, where R.sub.9 is halogen, a
phenyl group or a phenyl group substituted by halogen, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or a
phenyl group or a phenoxy group substituted by halogen, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or
R.sub.9 is a group of the formula SO.sub.2-phenyl, where the phenyl
group of the SO.sub.2-phenyl group is not substituted, or is a
phenyl group substituted by halogen, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or is
a phenyl group substituted by halogen, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or
the formulae (6) ##STR00018## wherein R.sub.10 is --H or
halogen.
7. A light-fast multicomponent fiber made in accordance with the
process of claim 1.
8. A carpet or textile floorcovering comprising at least one
light-fast multicomponent fiber according to claim 7.
9. A process comprising the step of treating a multicomponent fiber
composed of a thermodynamically compatible polyolefin and polyamide
with at least one benzotriazole derivative.
10. (canceled)
11. A process according to claim 3, wherein the multicomponent
fiber has a polyfilamentary character.
12. A process according to claim 4, wherein the first polymer is a
polyamide.
13. A process according to claim 4, wherein the second polymer is a
polypropylene
Description
[0001] This invention relates to a process for dyeing
multicomponent fibres especially for dyeing bi- and tricomponent
fibres, the dyeings being notable for excellent light-fastness.
This invention further also relates to the light-fast
multicomponent fibres dyed thereby.
[0002] Unmodified polyolefin fibres, especially polypropylene (PP)
fibres, are dyeable with the usual disperse dyes only in extremely
pale shades having very low fastnesses. Prior art ways to improve
dyeability include, on the one hand, chemically modifying
polyolefin fibres (especially polypropylene (PP) fibres) and on the
other to use modified or newly synthesized dyes.
[0003] JP 10-331034 relates to a fiber having excellent moisture
absorbing and releasing property and suitable as a fiber for
textile improved in heat resistance and light resistance of the
fiber itself by including a specific amount of phenolic antioxidant
in a core component and including a specific amount of
benzotriazole-based ultraviolet light absorbent in a sheath
component. Nothing is disclosed about light fast dyeings on
bicomponent fibers.
[0004] EP445076 relates to stable dispersions of benzotriazole
ultraviolet (U.V.) absorbing agents utilizing modified
ligninsulfonates as the dispersing agent, a method of dispersing
the benzotriazole U.V. absorbing agents, a method of protecting
textiles by utilizing the stable dispersions and textiles treated
with the stable dispersions avoiding that any undispersed U.V.
absorbing agent is filtered out, producing deposits. Nothing is
disclosed about light fast dyeings on bicomponent fibers.
[0005] EP474595 relates to stable aqueous dispersions of
UV-absorbing benzotriazole compounds wherein these dispersions are
excellent compositions for improving the light fastness of dyeings
on synthetic fibres, in particular polyester fibres or
acid-modified polyester fibres. However, nothing is disclosed about
light fast dyeings on bicomponent fibers.
[0006] U.S. Pat. No. 5,221,287 relates to a process for the
photochemical and thermal stabilization of polyamide fibres having
an affinity for acid and basic dyes, and of blends of said fibres
with one another and with other fibres. However, nothing is
disclosed about light fast dyeings on bicomponent fibers.
[0007] It has now emerged that suitable process management and
suitable dispersions of dyes which can also be used for dyeing
polyester fibres make it possible to obtain good light-fast dyeing
results if the dyeing is additionally treated, the treatment being
effected with benzotriazole derivatives in particular.
[0008] It has now been found that the dyeings of multicomponent
fibres especially after the dyeing of bicomponent fibres composed
of a thermodynamically compatible polyolefin and polyamide with
disperse dyes have a high light-fastness when the multicomponent
fibres are subjected to treatment with benzotriazole
derivatives.
[0009] This invention further also relates to the light-fast
multicomponent fibres dyed by the process of the present
invention.
[0010] This invention also relates to the use of benzotriazole
derivatives for enhancing the light-fastness of dyed multicomponent
fibres especially after the dyeing of bicomponent fibres composed
of a thermodynamically compatible polyolefin and polyamide.
[0011] The multicomponent fibres according to the invention are
side-by-side fibres (the two or more different polymers are side by
side without being a blend nor in a different fibre--thus bonded
together and therefore forming a single fibre), sheath-core fibres
(a first polymer forms a core portion and a second polymer forms a
sheath around the first polymer, and optionally further polymers
form a sheath around the inner core-and-sheath-structure) or
islands-in-a-sea (multiple core portions of a first polymer are
surrounded by a second sheath polymer) fibres. The sheath-core
fibres and the islands-in-a-sea fibres are the preferred
multicomponent fibres, while the sheath-core fibres are the even
more preferred fibres. In the preferred sheath-core fibres the
sheath is arranged concentrically around the core portion.
[0012] Preferred multicomponent fibres especially bicomponent
fibres consist of a thermodynamically compatible polyolefin and
polyamide, in particular of polypropylene, modified polyamide
(PA)and polyamide.
[0013] Preferred multicomponent fibres or to be more precise
bicomponent fibres have a polyfilamentary character.
[0014] More preferred multicomponent fibres especially bicomponent
fibres consist of a core of one polymer (preferably the polyamide)
which is sheathed by the other polymer (preferably by the
polyolefin). The fibres composed of a thermodynamically compatible
of polypropylene and polyamide, especially polypropylene and nylon
6 (PP/N6), are produced by conventional spinning processes such
that fine filaments of one polymer (preferably polyamide) are
formed in the matrix of the other polymer (preferably the
polyolefin). When two melts are fed simultaneously to a spinneret
hole results a bicomponent filament is resulting. Spinnerets with
two concentric holes yield sheath-core filaments (bicomponent
sheath-core fibres) from two melts.
[0015] To improve the adhesion between the PA and the PP it is
possible to utilize ionomer (IM), maleic anhydride or alternatively
a polyester. These agents for enhancing the compatibility between
the various components may be present in amounts of up to 10
percent by weight, but preferably from 3 to 8 percent by
weight.
[0016] The preferred multicomponent fibres especially bicomponent
fibres according to the invention are dyed in the one component and
the benzotriazole derivatives are applied in the other portion of
the multicomponent fibre or bicomponent fibres. The dyestuff and
the benztriazole derivative are not located in the same component
of the multicomponent fibres.
[0017] The preferred multicomponent fibres especially bicomponent
fibres according to the invention are dyed in the core portion and
the benzotriazole derivatives are applied in the sheath portion of
the multicomponent fibre or bicomponent fibres. The preferred
multicomponent fibres according to the invention are bicomponent
fibres.
[0018] Preferred benzotriazole derivatives are benzotriazole
derivatives of the formula (I)
##STR00001##
where
[0019] R.sub.1 is a halogen atom,
[0020] R.sub.2 is a C.sub.1 to C.sub.6 alkyl, and
[0021] R.sub.3is a C.sub.1 to C.sub.6 alkyl.
[0022] Preferably R.sub.3 is a branched C3 to C6 hydrocarbyl
radical.
[0023] In a preferred benzotriazole of the formula (I)
[0024] R.sub.1 is chlorine or fluorine,
[0025] R.sub.2 is a methyl, ethyl or propyl, and
[0026] R.sub.3 is a methyl, ethyl or propyl , isopropyl or tertiary
butyl.
[0027] Very particularly preferred benzotriazoles of the formula
(I) have the formula (I')
##STR00002##
[0028] where
[0029] R.sub.1 is a halogen atom,
[0030] R.sub.2 is a C.sub.1 to C.sub.6 alkyl, and
[0031] R.sub.3is a C.sub.1 to C.sub.6 alkyl.
[0032] In a preferred benzotriazole of the formula (I')
[0033] R.sub.1 is chlorine or fluorine,
[0034] R.sub.2 is a methyl, ethyl or propyl, and
[0035] R.sub.3 is a methyl, ethyl or propyl, isopropyl, tertiary
butyl.
[0036] Very particular preference is given to the benzotriazole
derivative of the formula (I') wherein
[0037] R.sub.1 is chlorine, R.sub.2 is methyl and R.sub.3 is
tertiary butyl.
[0038] The benzotriazole derivative is used in an amount of 0.01 to
20 percent by weight based on the dry material preferably 0.01
especially 0.1 to 15 percent by weight based on the dry material,
but in particular 0.1 to 10 percent by weight based on the dry
material in the process of the present invention.
[0039] The treatment with the benzotriazole derivative can take
place after the dyeing or else concurrently during the dyeing.
Dyeing for the purposes of the present invention includes
printing.
[0040] Disperse dyes for the process of the present invention are
those which are customarily also used for dyeing polyester
materials, but have high light-fastnesses on polyamide too.
[0041] Preferred disperse dyes for the process of the present
invention are disperse dyes having the formulae (1)
##STR00003##
[0042] where R.sub.4 and R'.sub.4 are independently a phenyl group
or a phenyl group substituted by halogen, in particular --Cl or
--Br, --CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3,
--OCH.sub.2CH.sub.3 or --OH.
[0043] More preferred disperse dyes for the process of the present
invention are disperse dyes having the formulae (2), (3) or (4)
##STR00004##
where R.sub.5, R'.sub.5, and R''.sub.5 are independently halogen,
in particular --Cl or --Br, a phenyl group or a phenyl group
substituted by halogen, in particular --Cl or --Br, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH.
[0044] More preferred disperse dyes for the process of the present
invention are disperse dyes having the formulae (5)
##STR00005##
where [0045] R.sub.6 is halogen, in particular --Cl or --Br, a
phenyl group or a phenyl group substituted by halogen, in
particular --Cl or --Br, --CH.sub.3, --CH.sub.2CH.sub.3,
--OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or a phenyl group or a
phenoxy group substituted by halogen, in particular --Cl or --Br,
--CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or
--OH, [0046] R.sub.7 is a phenyl group or a phenyl group
substituted by halogen, in particular --Cl or --Br, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH,
[0047] R.sub.8 is --NH.sub.2 or --NHR.sub.9, where R.sub.9 is
halogen, in particular --Cl or --Br, a phenyl group or a phenyl
group or phenoxy group substituted by halogen, in particular --Cl
or --Br, --CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3,
--OCH.sub.2CH.sub.3 or --OH, or a phenyl group or a phenoxy group
substituted by halogen, in particular --Cl or --Br, --CH.sub.3,
--CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or --OH, or
R.sub.9 is a group of the formula SO.sub.2-phenyl, where the phenyl
group of the SO.sub.2-phenyl group is not substituted, or is a
phenyl group substituted by halogen, in particular --Cl or --Br,
--CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3, --OCH.sub.2CH.sub.3 or
--OH, or is a phenyl group substituted by halogen, in particular
--Cl or --Br, --CH.sub.3, --CH.sub.2CH.sub.3, --OCH.sub.3,
--OCH.sub.2CH.sub.3 or --OH.
[0048] More preferred disperse dyes for the process of the present
invention are disperse dyes having the formulae (6)
##STR00006##
where
[0049] R.sub.10 is --H or halogen, in particular --H, --Cl or
Br.
[0050] Very particularly suitable disperse dyes of the formulae
(1), (2), (3), (4), (5) or (6) for the process of the present
invention are C. I. Disperse Orange 41 and/or C. I. Disperse Orange
41:1 and/or C. I. Disperse Violet 36 and/or C. I. Solvent Yellow
163 and/or C. I. Disperse Blue 73 and/or C. I. Disperse Blue 56
and/or C. I. Disperse Red 86 and/or C. I. Disperse Red 60 and/or C.
I. Disperse Violet 27 and/or C. I. Disperse Yellow 64 and/or C. I.
Disperse Yellow 54.
[0051] These dyes of the formulae (1), (2), (3), (4), (5) or (6)
can be used alone or as mixtures comprising one of the
abovementioned disperse dyes in the process of the present
invention.
[0052] The dyeing or printing in the process of the present
invention is done in accordance with processes known per se, for
example the processes described in French Patent No. 1 445 371. The
customary dyeing processes whereby the processes of the present
invention can be dyed and/or printed with disperse dyes are also
described for example in M. Peter and H. K. Rouette: "Grundlagen
der Textilveredelung; Handbuch der Technologie, Verfahren und
Maschinen", thirteenth, revised edition, 1989, Deutscher Fachverlag
GmbH, Frankfurt/Main, Germany, ISBN 3-87150-277-4, in which the
following pages are particularly relevant: the pages 460-461,
482-495, 556-566 and 574-587. Possibilities for mats and carpets
include the continuous or batch dyeing process and also the
contactless dyeing or the classic printing or spraying of the dyes
or formulations of the dyes by the ChromoJet process or other
processes (M. Peter and H. K. Rouette: "Grundlagen der
Textilveredelung; Handbuch der Technologie, Verfahren und
Maschinen", thirteenth, revised edition, 1989, Deutscher Fachverlag
GmbH, Frankfurt/Main, Germany, ISBN 3-87150-277-4, pages 484 to 492
(chapter 7.221.1) and page 846 and FIG. 8.70).
[0053] The dyeings obtained have good all-round fastnesses; to be
mentioned in particular are the light-fastness, fastness to heat
setting and pleating and also the excellent wet-fastnesses, after
thermal stabilization (thermomigration-fastness), but in particular
the high light-fastness.
[0054] The textile material mentioned may be present in the various
processing forms, for example as fibre, yam or web, as a woven or
loop-formingly knitted fabric or in the form of carpets. These
textiles find utility in the automotive sector or generally in
transit engineering such as rail, aeroplanes and/or trams, in the
technology of built structures or to be more precise in or on built
structures and/or in the leisure sector.
[0055] The disperse dyes are applied to the textile materials by
known dyeing processes. For example, polyolefin-polyamide
multicomponent fibres or bicomponent fibre materials are exhaust
dyed from an aqueous dispersion in the presence of anionic or
nonionic dispersants with or without customary carriers at
temperatures between 70 and 140.degree. C.
[0056] Fibre materials based on polyolefin-polyamide are preferably
dyed at a pH of 3 to 7, and especially 3 to 6. The dyeing
temperature is preferably in the range from 70 to 110.degree. C.,
and especially in the range from 80 to 105.degree. C.
[0057] The liquor ratio depends on the apparatus, the substrate and
the make-up form. However, the liquor ratio can be chosen within a
wide range, for example from 4:1 to 100:1 and preferably from 5:1
to 30:1.
[0058] The disperse dyes used according to the present invention
can be applied in the customary dyeing processes, such as for
example in the exhaust process, in the continuous process, in the
printing process or in non-impact printing processes such as for
example inkjet or the spray pressure/Chromojet particularly
suitable for carpets.
[0059] The disperse dyes used according to the present invention
are also suitable for dyeing from short liquors, as for example in
continuous dyeing processes or batch and continuous foam dyeing
processes.
[0060] The dyeing liquors or printing pastes, in addition to water
and the dyes, may contain further additives, for example wetting
agents, antifoams, leveling agents or agents to influence the
properties of the textile material, for example fabric softeners,
flame retardants or soil, water and oil repellents and also water
softeners and natural or synthetic thickeners, examples being
alginates and cellulose ethers.
[0061] The amounts in which the disperse dyes are used in the
dyebaths or printing pastes can vary within wide limits depending
on the desired depth of shade. Advantageous amounts will generally
be in the range from 0.01% (0.001% to 20% by weight) to 15% by
weight and especially 0.1% to 10% by weight, based respectively on
weight of fibre and the printing paste.
[0062] The various dyeing and printing processes for carpets are
preferably carried out as follows:
[0063] A liquor of the following composition is prepared for the
continuous process: [0064] 0.001-30 g/l of disperse dyes [0065]
1-15 g/l of thickener, e.g. Polyprint M225, polysaccharide, guar,
tamarind [0066] 0.1-10 g/l of wetting and anti-frosting agents,
e.g. Sandogen WAF liq., Sandogen AFB liq. [0067] 0.1-10 g/l of an
acid donor, e.g. Sandacid VS liq., Sandacid VAN liq. [0068] 0.1-10
g/l of buffer systems, for example Sandacid PB liq., Sandacid PBBK
liq. [0069] 0.1-30 g/l of benzotriazole derivatives of the formula
(I).
[0070] The material to be dyed is padded in a pad-mangle to a wet
pick-up of 100-600% preferably 400% and fixed for 8 min in hot
saturated steam at around 102.degree. C. for 2-20 min;
alternatively, fixing can also be effected with dry heat or
superheated steam during the period indicated above. Thereafter,
the material is rinsed with cold water and if appropriate further
treated or further processed as customary in the industry.
[0071] A liquor of the following composition is prepared for the
exhaust process: [0072] 0.001-20% of disperse dyes [0073] 0.1-10
ml/l of dispersant, e.g. Lyocol RDN liq., Lyocol OU liq. [0074]
0.1-5 g/l of ammonium sulphate [0075] 0.1-30 g/l of benzotriazole
derivatives of the formula (I).
[0076] The pH is adjusted to a value of 3-7 and preferably to a pH
of 4.5-6. It is dyed at 70-140.degree. C. for 30 to 90 min and then
rinsed with water and is if appropriate further treated or further
processed as customary in the industry.
[0077] A printing paste of the following composition is prepared
for the non-impact printing process: [0078] 0.001-30 g/kg of
disperse dyes [0079] 2-20 g/kg of synthetic thickener, e.g.
Tanaprint ST 160, Prisulon 200, Texipol 675031 [0080] 0.1-10 g/kg
of dispersing, wetting, anti-frosting agent, e.g. Sandogen WAF
liq., Sandogen AFB liq., Tanaspers CF liq. [0081] 0.1-10 g/kg of
acid for pH adjustment, e.g. citric acid [0082] 0.1-10 g/kg of
defoamer, for example Nofome 1125 liq., Antimussol UP liq.,
Antimussol SF liq. [0083] 0.1-30 g/l of benzotriazole derivatives
of the formula (I).
[0084] The material to be printed in a non-impact printing process
is sprayed with the printing paste to a pick-up of 100-600% and
preferably 300% based on the dry weight of the material to be
printed and the material is fixed with hot saturated steam at
102.degree. C. for 2 to 20 min (preferably 8 min), although dry
heat or superheated steam can alternatively be used for fixing.
Thereafter, the material is rinsed with cold water and is if
appropriate further treated or further processed as customary in
the industry.
[0085] Industry-customary further treatments or further processing
operations may comprise finishing with fluorinated chemicals, other
soil- and/or water-repellant chemicals and/or the application of a
carpet backing.
[0086] The examples which follow illustrated the invention.
Percentages are by weight unless stated otherwise.
EXAMPLES
[0087] The dyeing examples utilized small pieces of carpet produced
from a bicomponent fibre (PP/PA) from Aquafil Textile Yarns S.p.A.,
Via Parma, 45, IT--46041 Asola--Mantova (Italy).
Example 1
(Not According to Invention)
[0088] Small pieces of carpet are padded in a pad-mangle in a bath
containing 0.25 g/l of C.I. Solvent Yellow 163, 0.06 g/l of C.I.
Disperse Red 86 and 0.009 g/l of C.I. Disperse Blue 73, 100 g/l of
a 3.5% solution of Polyprint M225, 3 g/l of Sandogen WAF liq., 2
g/l of Sandacid VS liq., and sufficient Sandacid PB liq. for a bath
pH of 5 to a wet pick-up of 400% (based on the dry weight), and the
piece of carpet thus impregnated is fixed for 8 minutes in hot
saturated steam at 102.degree. C. and subsequently washed with cold
water. A beige dyeing was obtained on the piece of carpet. The
piece of carpet thus obtained was tested for light-fastness (see
hereinbelow).
Example 2
(Not According to Invention)
[0089] Small pieces of carpet are dyed as in Example 1, but the
bath additionally contained 5 g/l of a 10% suspension of a compound
of the formula
##STR00007##
[0090] A beige dyeing was obtained in the piece of carpet. The
piece of carpet thus obtained was tested for light-fastness(see
hereinbelow).
##STR00008##
[0091] A beige dyeing was obtained in the piece of carpet. The
piece of carpet thus obtained was tested for light-fastness (see
hereinbelow).
Example 6
(Not According to Invention)
[0092] Small pieces of carpet are dyed as in Example 1, but the
bath additionally contained 5 g/l of a 10% suspension of a compound
of the formula
##STR00009##
[0093] A beige dyeing was obtained in the piece of carpet. The
piece of carpet thus obtained was tested for light-fastness (see
hereinbelow).
Measurement of Light-Fastness of Examples 1 to 7
[0094] Light-fastness was measured according to ISO 105 Method 2. A
sample of the piece of carpet to be tested is exposed,
half-covered, to light together with the blue light-fastness
standards, which are pieces of wool cloth. Colour fastness is
assessed by comparing the change in colour of the specimen with the
change in colour of the light-fastness standards used. The specimen
is exposed to a certain amount of light energy and the assessment
was made not against the eight-step blue scale but against the
five-step grey scale. This resulted in a colour fastness to light
rating of 1-5.
Example 3
[0095] Small pieces of carpet are dyed as in Example 1, but the
bath additionally contained 5 g/l of a 25% suspension of a compound
of the formula
##STR00010##
[0096] A beige dyeing was obtained in the piece of carpet. The
piece of carpet thus obtained was tested for light-fastness (see
hereinbelow).
Example 4
(Not According to Invention)
[0097] Small pieces of carpet are dyed as in Example 1, but the
bath additionally contained 5 g/l of a 20% suspension of a compound
of the formula
##STR00011##
[0098] A beige dyeing was obtained in the piece of carpet. The
piece of carpet thus obtained was tested for light-fastness (see
hereinbelow).
Example 5
(Not According to Invention)
[0099] Small pieces of carpet are dyed as in Example 1, but the
bath additionally contained 5 g/l of a suspension of 35 parts of a
compound of the formula
##STR00012##
and 35 parts of a compound of the formula
TABLE-US-00001 Grey scale at exposure step Grey scale at exposure
step Example BT6 = GS4 BT6 = GS3-4 1 2.1 1.2 2 2.8 1.2 3 3.6 2.7 4
2.1 1.5 5 1.6 1.2 6 2.3 1.2
Example 8
[0100] Small pieces of carpet are padded in a pad-mangle in a bath
containing 0.30 g/l of C. I. Disperse Blue 73, 100 g/l of a 3.5%
solution of Polyprint M225, 3 g/l of Sandogen WAF liq., 5 g/l of a
25% suspension of a compound of the formula
##STR00013##
[0101] 2 g/l of Sandacid VS liq. and sufficient Sandacid PB liq.
for a bath pH of 5 to a wet pick-up of 400% (based on the dry
weight), and the piece of carpet thus impregnated was fixed for 8
minutes in hot saturated stream at 102.degree. C. and subsequently
washed with cold water to obtain a piece of carpet having a reddish
yellow colour of very good light-fastness.
Examples 9 to 16
[0102] Small pieces of carpet are dyed as in Example 8, but instead
of the 0.30 g/l of C.I. Disperse Blue 73 the bath contained 0.32
g/l of the following dye (F):
TABLE-US-00002 Example Dye (F) Colour of dyed piece of carpet 9 C.
I. Solvent Yellow 163 reddish yellow 10 C. I. Disperse Blue 73 pale
blue 11 C. I. Disperse Blue 56 blue 12 C. I. Disperse Red 86 pink
13 C. I. Disperse Red 60 bluish red 14 C. I. Disperse Violet 27
reddish violet 15 C. I. Disperse Yellow 64 pale yellow 16 C. I.
Disperse Yellow 54 pale yellow
[0103] Pieces of carpet coloured in the stated colour and having
very good light-fastness were obtained.
* * * * *