Reaction products of hydrazides and certain unsaturated esters

Details Reaction products of hydrazides and certain unsaturated esters Reaction products of hydrazides and certain unsaturated esters

C - Chemistry, Metallurgy

08

G

402/297, 402/364

C08G 83/00 (2006.01) C08G 63/685 (2006.01) C08G 73/08 (2006.01)

Patent

CA 1089593

Abstract of the Disclosure Novel products can be prepared by reaction of monohydrazide and/or polyhydrazides, in particular dihydrazides, with mono-, d or, poly-acrylyl compounds. The reactants can be chosen such th? the resulting polymers are strictly linear as in the case of re- action of a monohydrazide with a diacrylyl compound as follows: Image Image wherein each (O) is a carbonyl oxygen, n is a positive integer, each R is hydrogen or a monovalent group, and each Q is an organic group, R and Q being free of functions which would interfere with the desired reaction at 80°C. Various degrees of crosslinking ca? be achieved by reacting monohydrazides with components containing an average of more than two acrylate double bonds per molecule or by reacting di-hydrazides with di- or poly-acrylyl compounds. Fumaric, maleic and itaconic esters and acid esters add to hydrazides in a similar fashion as acrylates, the aliphatic double bond being similarly activated by the carbonyl group. However, methacrylates are totally inert to hydrazide at 80°C. These reaction products of polymers are useful as exterior protective and decorative coating materials for bonderized steel and the like. Their impact resistance can be improved by reaction with toughening agents.

271253

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