Compositions – Organic luminescent material containing compositions – Optical brightening compositions
Patent
1996-03-13
1997-12-09
Bonner, Melissa
Compositions
Organic luminescent material containing compositions
Optical brightening compositions
558411, D06C 312
Patent
active
056956860
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to novel brightener mixtures containing from 75% by weight to 100% by weight, based on the weight of the mixture, of the bisstyryl compounds of the formulae I and II ##STR2## in a weight ratio from 10:90 to 70:30, formulations containing the novel mixtures, and also their use for optically brightening synthetic, semisynthetic or natural polymer materials.
EP-A-238 446 and EP-A-321 393 disclose mixtures of optical brighteners containing the abovementioned bisstyryl compounds I and II in the weight ratios 80.25:19.75 and 80:20. However, it has been found that these mixtures have disadvantages in their application properties.
GB-A-2 200 660 describes brightener mixtures containing from 51 to 98.5% by weight of the bisstyryl compound I and from 48.5 to 1% by weight of bisstyrene compound II.
It is an object of the present invention to provide novel brightener mixtures based on bisstyryl compounds which shall be simple to obtain and have advantageous application properties, in particular high whiteness.
We have found that this object is achieved by the brightener mixtures more particularly described at the beginning.
The novel brightener mixtures, in each case based on the weight of the mixture, contain from 75 to 100% by weight, preferably from 80 to 100% by weight, in particular from 85 to 100% by weight, of the bisstyryl compounds of the formulae I and II.
Of particular industrial interest are brightener mixtures containing, based on the weight of the mixture, from 85 to 90% by weight of the bisstyryl compounds of the formulae I and II.
As remainders (to 100% by weight) the brightener mixtures of the invention may generally additionally contain compounds of the formulae III and/or IV ##STR3##
In the brightener mixtures of the invention the bisstyryl compounds of the formulae I and II are present in a weight ratio from 10:90 to 70:30, preferably from 20:80 to 60:40, and in particular from 30:70 to 60:40.
Of particular industrial interest are brightener mixtures in which the bisstyryl compounds of the formulae I and II are present in a weight ratio from 40:60 to 50:50, in particular about 45:55.
The novel brightener mixtures can be prepared for example by mixing the individual components in the appropriate weight ratio. The individual components can be obtained in a conventional manner. For example, terephthalaldehyde can be reacted with alkyl cyanophosphonates in a basic medium in an inert organic diluent.
The present invention further provides brightener formulations containing water and, in each case based on the weight of the formulation, from 3 to 25% by weight, preferably from 5 to 15% by weight, of the above-defined brightener mixture and also from 5 to 60% by weight, preferably from 5 to 52% by weight, of auxiliaries.
Suitable auxiliaries include for example anionic or nonionic dispersants from the class of the ethylene oxide adducts with fatty alcohols, higher fatty acids or alkylphenols or ethylenediamineethylene oxide-propylene oxide adducts, or dispersants as described in DE-A-2 745 449, copolymers of N-vinylpyrrolidone with 3-vinylpropionic acid, water retention aids, such as ethylene glycol, glycerol or sorbitol, or biocides.
A preferred brightener formulation, in addition to water, contains in each case, based on the weight of the formulation, from 3 to 25% by weight, preferably from 5 to 15% by weight, of the above-defined brightener mixture, from 3 to 12% by weight of anionic or nonionic dispersant, from 1 to 15% by weight of copolymers of N-vinylpyrrolidone with 3-vinylpropionic acid and from 1 to 25% by weight of further auxiliaries (eg. water retention aids or biocides).
The brightener mixtures of the invention are advantageously suitable for optically brightening synthetic, semisynthetic or natural polymer materials, preferably polyester and in particular polyester fabrics. They combine a low fixing or exhaust temperature with advantageous application properties. They are also high yielding.
The Examples which follow illustrate the invention.
PREPARATION OF
REFERENCES:
patent: 4778622 (1988-10-01), Guglielmetti et al.
patent: 4867906 (1989-09-01), Guglielmetti et al.
patent: 5053055 (1991-10-01), Fringeli et al.
patent: 5072016 (1991-12-01), Guglielmetti et al.
Etzbach Karl-Heinz
Hauptreif Manfred
Herrmann Manfred
Leppert Norbert
Raatz Peter
BASF - Aktiengesellschaft
Bonner Melissa
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