Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-09-07
1997-10-14
Woodward, Ana
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
134201, 252344, 252DIG2, 252542, 525279, 525417, 525421, 525426, 525434, 525435, 525436, C08L 7700
Patent
active
056773846
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to polyamidoamines and polyethyleneimines grafted with 1-vinylpyrrolidone, 1-vinyltriazole and/or 1-vinylimidazoles, their preparation by free-radically initiated polymerization of 1-vinylpyrrolidone, 1-vinyltriazole and/or 1-vinylimidazoles in the presence of polyamidoamines and/or polyethyleneimines, the use of the grafted polyamidoamines and polyethyleneimines thus obtainable in detergents, and detergents containing the grafted products.
DE-B-22 32 353 discloses washing and cleaning compositions which consist essentially of from 95 to 60% by weight of nonionic detergents and from 5 to 40% by weight of a partially or completely water-soluble polyvinylpyrrolidone and which are essentially free of anionic surfactants. The vinylpyrrolidone polymer prevents the transfer of dye from colored to white textiles during washing. The vinylpyrrolidone polymer has a molecular weight within the range from about 10,000 to about 1,000,000. Both homopolymers and copolymers of vinylpyrrolidone are suitable. Suitable comonomers mentioned are acrylonitrile or maleic anhydride. However, the effectiveness of the vinylpyrrolidone polymer as a color transfer inhibitor is strongly impaired by anionic surfactants.
DE-A-28 14 287 discloses washing and cleaning compositions which contain anionic and/or nonionic surfactants, builders and other customary detergent additives and also, as stain inhibitors, from 0.1 to 10% by weight of water-soluble or -dispersible homo- or copolymers of N-vinylimidazole. In 1% strength by weight aqueous solution at 20.degree. C. the polymers have a specific viscosity from 0.01 to 5.
The abovementioned polymers have the disadvantage that they are neither biodegradable nor removable from the waste water by adsorption on sewage sludge.
The earlier but as yet unpublished DE application P 4 244 386.5 discloses copolymers which are obtainable by free-radically initiated copolymerization of mixtures of
(a) 20-95% by weight of 1-vinylpyrrolidone and/or 1-vinylimidazoles, and
(b) 5-80% by weight of water-insoluble polymers containing in the molecule at least one ethylenically unsaturated double bond and/or a mercapto group.
These copolymers are used as detergent additives for inhibiting the transfer of dye during the washing process. They are eliminable from the waste water by adsorption on sewage sludge.
EP-A-0 068 232 discloses liquid detergents containing nonionic or cationic surfactants combined with polyethyleneimines, polyamines, polyamidoamides or polyacrylamides. The detergents are free of textile-softening quaternary ammonium compounds and are also essentially phosphate-free. The polymers present in the liquid detergents are intended to suppress or prevent the transfer of dye from colored to uncolored textiles during the washing process. However, their effectiveness is relatively low.
It is an object of the present invention to provide novel compounds which are suitable for use as detergent additives and substantially suppress or prevent any transfer of dye from colored to uncolored textiles during the washing process and are eliminable from the waste water.
We have found that this object is achieved according to the invention by grafted polyamidoamines and grafted polyethyleneimines obtainable by free-radically initiated polymerization of
(a) 1-vinylpyrrolidone, 1-vinyltriazole, 1-vinylimidazoles of the formula ##STR1## where R is H, CH.sub.3 or C.sub.2 H.sub.5 and n is from 1 to 3, mixtures of said monomers or mixtures of at least one of said monomers with up to 20% by weight of other monoethylenically unsaturated monomers in the presence of
(b) water-soluble or -dispersible polyamidoamines, polyethyleneimines or mixtures thereof in a weight ratio of (a):(b) from 5:95 to 95:5.
The present invention also provides a process for preparing grafted polyamidoamines and grafted polyethyleneimines, which comprises free-radically polymerizing
(a) 1-vinylpyrrolidone, 1-vinyltriazole, 1-vinylimidazoles of the formula ##STR2## where R is H, CH.sub.3 or C.sub.2 H.sub.5 and n is from
REFERENCES:
patent: 5122577 (1992-06-01), Noda
patent: 5274028 (1993-12-01), Bertrand et al.
Detering Juergen
Oppenlaender Knut
Schade Christian
Scherr Guenter
Schwendemann Volker
BASF - Aktiengesellschaft
Woodward Ana
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