Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-10-17
1999-01-26
Gupta, Yogendra N.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510361, 510475, 510476, 510499, 525398, 525400, 528220, 528230, 528243, C11D 337
Patent
active
058638792
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the use of polymers as detergent additives for inhibiting dye transfer during the wash, to polymers that contain aminal, hemiaminal and/or aminal-acetal structures, and to detergents containing these polymers.
2. Discussion of the Background
DE-B-22 32 353 discloses detergent and cleaner mixtures which consist essentially of 95 to 60% by weight of nonionic detergents and 5 to 40% by weight of a partially or completely water-soluble polyvinylpyrrolidone and are essentially free of anionic surfactants. Polymers of vinylpyrrolidone prevent the transfer of dye from colored to white textiles during the wash. Polymers of vinylpyrrolidone have molecular weights within the range from about 10 000 to about 1 000 000. Both homopolymers and copolymers of vinylpyrrolidone are suitable. Acrylonitrile and maleic anhydride are mentioned as suitable comonomers. However, the effectiveness of vinylpyrrolidone polymer dye transfer inhibitors is strongly impaired by anionic surfactants.
DE-A-28 14 287 discloses detergent and cleaner compositions containing anionic and/or nonionic surfactants, builders and other customary detergent additives and also--as discoloration-inhibiting additives--from 0.1 to 10% by weight of water-soluble or water-dispersible homo- or copolymers of N-vinylimidazole. These polymers, however, are insufficiently active against a number of color stains.
EP-A-0 461 399 and EP-A-0 552 702 disclose polymers which contain aminal and acetal-aminal groups and which are prepared by reacting polyvinylamines or copolymers which contain vinylamine and vinyl alcohol units with aldehydes. These polymers are used as flocculants or as retention aids in papermaking.
JP-A-61/051006 discloses particulate crosslinked polyvinylamines prepared by reaction of polyvinylamines with crosslinkers, such as alkylene dihalides, epichlorohydrin or dialdehydes. The crosslinked polyvinylamines are used as ion exchangers.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a detergent additive which, compared with known dye transfer inhibitors, shows improved effectiveness. It is a further object to provide novel compounds.
We have found that the first object is achieved by using polymers which are prepared by reaction of or without unconverted vinylamine units, as detergent additive for inhibiting dye transfer during the wash.
We have found that the other object is achieved by polymers containing aminal, hemiaminal and/or aminal-acetal structures, obtainable by reaction of
The present invention further provides detergents based on surfactants with or without builders and other customary constituents, containing from 0.05 to 10% by weight of polymers which are preparable by reaction of hemiaminal and/or aminal-acetal structures with or without unconverted vinylamine units.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The polymers to be used according to the invention as dye transfer inhibitors in detergents are at least partly known from the prior art; cf. the above-cited references EP-A-0 461 399, EP-A-0 552702 and JP-A-61/051006. They are prepared starting from polymers containing vinylamine units. These polymers can be either homopolymers or copolymers. The polymers with vinylamine units are usually prepared by polymerizing open-chain N-vinylcarboxamides of the formula I ##STR1## where R.sup.1 and R.sup.2 are each H or C.sub.1 -C.sub.6 -alkyl, and subsequent partial or complete elimination of the group ##STR2## by heating with acids or bases. Partial elimination of the groups ##STR3## from the polymers gives polymers (a) with randomly distributed units of the structure ##STR4## where the substituents R.sup.1 and R.sup.2 can be identical or different and each is H or C.sub.1 -C.sub.6 -alkyl. R.sup.1 and R.sup.2 are preferably H; that is, the preferred open-chain N-vinylcarboxamide is N-vinylformamide. Such polymers are known for example from EP-B-0 071 050.
The proportion of units III in the polymers ranges from
REFERENCES:
patent: 5086111 (1992-02-01), Pinschmidt et al.
patent: 5185083 (1993-02-01), Smigo et al.
Gunther Wolfgang
Kroner Michael
Nilz Claudia
Oppenlander Knut
Trieselt Wolfgang
BASF - Aktiengesellschaft
Gupta Yogendra N.
Kifle Bruck
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