N-substituted aspartic acid derivatives as curing agents for...

Details N-substituted aspartic acid derivatives as curing agents for... N-substituted aspartic acid derivatives as curing agents for...

C - Chemistry, Metallurgy

08

G

402/275, 260/479

C08G 59/52 (2006.01) C07C 101/26 (1980.01) C07C 101/447 (1980.01)

Patent

CA 1132601

Abstract N-Substituted aspartic acid monoesters of ehe formula Image wherein for example R1 is an alkyl group having 1 to 12 C atoms, a cyclohexyl, phenyl, tolyl or benzyl group, R2 is an alkyl group having 3 or 4 C atoms, or a cyclohexyl, phenyl, tolyl or methoxyphenyl group, and x is 2 or 3, are obtained by adding, by means of an addition reaction, to 1 mol of a maleic acid monoester of the formula Image 1 mol of an amine of the formula Image in the presence of a tertiary amine. The novel N-substituted aspartic acid monoesters are valuable curing agents for epoxide resins, and are particularly suitable for producing storage-stable B-stage resins.

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