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US 4,544,621 AGranted
Photocrosslinkable water-soluble polymers, containing maleimidyl and quaternary ammonium groups process for their preparation and use thereof
AssigneeCiba-Geigy Corporation
InventorMartin Roth
Life of this patent
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Abstract
Polymers containing maleimide groups and quaternary ammonium groups are soluble in water. They can be used as light-sensitive photographic recording materials which can be developed with water.
Claims8
A homopolymer or copolymer containing maleimidyl and quaternary ammonium groups and having a molecular weight of at least 1000, which polymer contains structural units of the formula I ##STR25## wherein R is a hydrogen atom or a methyl group,
- Y is an oxygen atom or the --NH group,
- A is a linear or branched C.sub.2 -C.sub.6 alkylene group,
- R.sub.1 and R.sub.2 independently of each other are C.sub.1 -C.sub.4 alkyl or together are tetramethylene, pentamethylene or 3-oxapentylene,
- D is a radical of the formula ##STR26## wherein R.sup.3 is alkylene, oxaalkylene or benzylene, R.sup.4 is a hydrogen atom or C.sub.1 -C.sub.4 alkyl, R.sup.5 is a bivalent aliphatic, cycloaliphatic or aromatic hydrocarbon radical or a bivalent aliphatic or aromatic heterocyclic radical containing up to 18 carbon atoms, and R.sup.6 has the meaning of R.sup.5 or is ##STR27## wherein x is a value from 1 to 29 and R.sup.4 is hydrogen atom or C.sub.1 -C.sub.4 alkyl;
- and T.sub.1 and T.sub.2 independently of each other are C.sub.1 -C.sub.4 alkyl or together are unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted trimethylene or tetramethylene, and
- Z.sup..crclbar. is an anion.
3 more elements
Dependencies are inferred from the claim text.