POLYMERISABLE MONOMERS, THEIR USE TO PREPARE CROSS-LINKABLE POLYMERS AND THE CROSS-LINKABLE POLYMERS

摘要

Crosslinkable polymers which can be purified by conventional purification techniques such as dialysis, diafiltration, ultrafiltration without losing their capability of crosslinking are prepared from monomers having the formula (I): ……CH2 = @ - @ - Z - @ - CH2 - R<1>… wherein R is hydrogen or methyl,… R<1> is cyano or -CO-R<2>,… wherein R<2> is alkyl having from 1 to 6 carbon atoms; …… wherein R<3> is a divalent hydrocarbon,… each X is -O- or NR<4>- provided that at least one X is -NR<4>-,… R<4> is hydrogen or alkyl having from 1 to 6 carbon atoms and… D<1> and D<2> represent the carbon and hydrogen atoms necessary to complete a 5- to 7- membered heterocyclic ring. …The monomers can be homopolymerized or copolymerized with other monomers. The resulting purified polymers are particularly useful in photographic materials as gelatin extenders, binders or polymeric color couplers.