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US 4,161,407 AGranted
Crosslinkable polymers having vinylsulfonyl groups or styrylsulfonyl groups and their use as hardeners for gelatin
AssigneeEastman Kodak Company
InventorGerald A. Campbell
Life of this patent
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Abstract
Polymers containing pendent substituted ethylsulfonyl, vinylsulfonyl or styrylsulfonyl groups are useful as gelatin hardeners or can be crosslinked by bis-nucleophiles or by exposure to ultraviolet light.
Claims10
A polymer having repeating units having the formula:
- ##STR7## where A is a polymerized .alpha.,.beta.-ethylenically unsaturated addition polymerizable monomer or a mixture of such polymerizable monomers, x is a molar unit of from 10 to 95, and y is a molar unit of from 5 to 90,
- L is a linking group selected from the group consisting of alkylene, arylene, COZ and COZR.sup.3,
- R.sup.3 is selected from the group consisting of alkylene and arylene,
- Z is O or NH,
- R is hydrogen or alkyl having 1 to 6 carbon atoms, and R' is --CH.dbd.CHR.sup.2 or --CH.sub.2 CH.sub.2 X where X is a leaving group which can be displaced by a nucleophile or can be eliminated in the form of HX upon treatment with base and R.sup.2 is hydrogen, alkyl or aryl.
2 more elements
Dependencies are inferred from the claim text.