Compositions – Organic luminescent material containing compositions – Optical brightening compositions
Reexamination Certificate
2001-02-23
2004-04-20
Szekely, Peter (Department: 1714)
Compositions
Organic luminescent material containing compositions
Optical brightening compositions
C252S589000, C008S648000
Reexamination Certificate
active
06723256
ABSTRACT:
BACKGROUND OF THE INVENTION
Textile material which is used in an environment in which ultraviolet (UV) light acts on the textile material, especially UV light filtering through glass, as for the interior fittings in automobiles (carpets, belts, trim and seat covers), shop windows or glass-enclosed verandas (wall-to-wall carpets), are advantageously finished with a UV absorber in order that the fibres, especially synthetic and semisynthetic fibres, and the dyeings too to some extent, may be protected against the damaging action of the UV rays. A preferred procedure for textile material used in an environment with filtered UV light involves applying the UV absorbers to the substrate, in particular to the fabrics or to the yams, together with the respective dyes. Examples of technically preferred methods are batch methods, very particularly those in which the treatment liquors are subjected to a pronounced dynamic stress, for example for piece goods (particularly in rope or tube form) the dyeing in jet dyeing machines or for yarns the dyeing in the form of cheeses, or continuous methods whereby, for example, the impregnated fabrics are subjected to rapid thermal fixing, particularly, for example, according to the thermosol processes. It is also desirable with these dyeing processes to apply the UV absorbers at the same time. However, when dyeing with a pronounced dynamic stress on the liquors, especially for example when dyeing cheeses with disperse dyes, in the presence of UV absorbers, a problem is that, in the presence of UV absorbers which have been formulated with surfactants, the liquors may, under the action of the high shearing forces which occur in the cheese, alter to such an extent that the dyeings of the cheeses become unlevel, in particular due to the dye being filtered off, so that the yam when further processed, for example into knits or wovens, provides an unlevel appearance, or/and, if the dispersions change in their flow behaviour under the action of the high shearing forces, the liquor flow through the cheeses may gradually lead to a troublesome build-up of pressure, which—especially depending on yam quality and type of wind—leads to correspondingly more pronounced changes to the shearing forces in the package and may even lead to a complete standstill of the flow of liquor through the package. Similar problems can arise when dyeing piece goods in jet dyeing machines if disperse dyes are used in the presence of UV absorbers. Impregnation processes with thermofixing, especially in the case of thermosol processes, can in the event of very rapid thermofixing in the presence of disperse dye and UV absorber also lead to a troublesome twosidedness if the action of heat on the substrate is not very uniform. The situation can be similar with the use of dispersed optical brighteners, even in the presence of shading dyes.
EP-A-468921, 474595 and 490819 describe certain aqueous UV-absorber dispersions containing UV-absorbers and anionic surface active compounds or non-ionogenic and anionic surface active compounds and also such dispersions additionally containing a polysaccharide or a linear polymeric compound as a stabiliser and/or thickening agent. EP-A-328485 describes aqueous dispersions of certain dyes, optical brighteners or UV-absorbers containing, besides dispersant, an alkylene-bisamide defoamer and in some examples also a linear polymer (polyvinyl alcohol or a propyleneoxide/ethyleneoxide 3000 blockpolyrner) or a polysaccharide. EP-A-44995 describes aqueous dispersions of optical brighteners containing a grafted polymer of certain vinylic monomers.
It has now been found, surprisingly, that by employing the hereinbelow-defined (B)-containing formulations, which contain a particular combination of polymeric auxiliaries, the above-described problems may be solved or avoided, so that it becomes possible as a result to apply the particular disperse dye and UV absorber liquors or disperse brightener liquors even under pronounced dynamic stress (for example in the jet or through cheeses) without fear of a troublesome pressure build-up or dye or brightener deposits in the cheeses or of troublesome dye or brightener separations in the jet or in the case of continuous impregnation processes, in the event of unlevel heating for the thermofixing step, and without an unlevel fabric appearance having to be feared as a result
SUMMARY OF THE INVENTION
The invention relates to the defined compositions, their production and their use.
From a first aspect, the invention accordingly provides aqueous flowable dispersions (U) containing:
(A) a UV-light-absorbing textile treatment agent and
(B) a dispersant system containing
(B
X
) a non-ionogenic polymeric hydrophilic dispersant containing a polymeric lipophilic base structure and hydrophilic polyethylene glycol ether chains, or a mixture of such dispersants and
(B
Y
) anon-ionogenic or anionic vinyl-polymeric hydrophilic thickener or a mixture of such thickeners.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The UV-light-absorbing textile treatment agents (A) are UV-active agents, i.e. their fundamental property is the absorbing of UV light, whether to convert it at least partially into visible wavelengths, as in the case of optical brighteners, or to convert it at least partially into other energy forms or other wavelengths, as is the case with typical UV absorbers. Thus, the UV-active agents (A) are in particular
(A
1
) UV absorbers or
(A
2
) optical brighteners.
The UV-light-absorbing textile treatment agents (A) are in particular those which are dispersible in water in a manner known per se, i.e. with the aid of dispersants aqueous dispersions of (A) may be prepared which can then be used in accordance with the particular intended purpose.
Suitable UV absorbers (A
1
) include generally known substances as are usually employed for the UV-absorbing finishing of synthetic and semisynthetic textile fibres from an aqueous dispersion, chiefly those of the benzophenone, triazine or benzotriazole series, in particular phenols which bear a substituent of the triazine, benzoyl or benzotriazole series in ortho-position relative to the hydroxyl group and which may bear further substituents, in particular non-chromophoric and non-water-solublilizing substituents.
Suitable UV absorbers of the benzophenone series include generally 2-bydroxybenzophenones in which the two benzene rings may optionally be substituted with substituents customary in UV absorbers in particular with non-chromophoric and non-water-solubilizing substituents, for example with hydroxyl, alkyl, alkoxy, aryl, aryloxy, aralkoxy or halogen, aryl (in aryl, aryloxy and aralkoxy) being naphthyl or preferably phenyl, the alkyl and alkoxy radicals containing for example 1 to 4 carbon atoms, phenyl as aryl optionally being further substituted with alkyl, halogen and/or alkoxy, and halogen signifying preferably chlorine, and the alkoxy bridge in aralkoxy containing e.g. 1 or 2 carbon atoms, There may be mentioned as examples 2-hydroxybenzophenones of the following formulae
and
wherein
R
1
signifies hydrogen, hydroxyl, phenoxy, aralkoxy or C
1-14
-alkoxy,
R
2
signifies hydrogen, halogen or C
1-4
-alkyl,
R
3
signifies hydrogen or hydroxyl,
R
4
signifies hydrogen, hydroxyl, phenoxy, aralkoxy or C
1-4
-alkoxy,
R
5
signifies hydrogen or C
1-4
-alkyl,
R
6
signifies hydrogen or C
1-4
-alkyl and
X signifies a hydrocarbon bridge member having 2 to 12 carbon atoms or hydroxyalkylene.
In the compounds of the formula (1), R
2
, R
3
and R
4
stand each preferably for hydrogen. R
1
preferably stands for hydrogen, hydroxyl, phenoxy or C
1-14
-alkoxy.
In the formula (II), the two substituents R
5
and R
6
are advantageously in the positions ortho and para to the carbonyl group. Preferably, R
5
and also R
6
signify hydrogen. When X stands for hydroxyalkylene, it advantageously contains at least 3 carbon atoms and the hydroxyl group is advantageously not attached to the first or last carbon atom of the bridge. X may e.g. stand for 1,4-phenylene, 1,4-naphthylene or C
2-4
-alkylene or also for
Clariant Finance (BVI) Limited
Hanf Scott E.
Szekely Peter
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