Polymeric pyridinium ylide and products prepared from same

Details Polymeric pyridinium ylide and products prepared from same Polymeric pyridinium ylide and products prepared from same

C - Chemistry, Metallurgy

08

F

96/256, 204/91.5

C08F 2/48 (2006.01) C08F 246/00 (2006.01) G03F 7/038 (2006.01)

Patent

CA 1258653

ABSTRACT OF THE DISCLOSURE Polymers containing pyridinium ylide moieties are subjected to actinic irradiation to convert the pyridinium ylide moieties to water-insoluble or hydrophobic N-acyl-diazepine polymers. The polymeric pyridinium ylides can be used for the waterproofing or hydrophobization of surfaces and for the production of printing plates, photoresists, printed circuit boards and the like. The polymeric pyridinium ylides can be applied over a layer of metal or other etchable material carried by a suitable support, such that, upon selective irradiation through a stencil or photomask and removal of water-soluble pyridinium ylide polymer and underlying etchable material from unexposed areas, there is provided a pattern of such etchable material on said support.

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