N-substituted aspartic acid monoesters

Details N-substituted aspartic acid monoesters N-substituted aspartic acid monoesters

C - Chemistry, Metallurgy

08

G

260/315.25, 260/

C08G 59/52 (2006.01) C07D 295/13 (2006.01) C07D 521/00 (2006.01) C08G 59/42 (2006.01)

Patent

CA 1140558

2343/+ Abstract N-Substituted aspartic acid monoesters of the fonmula I Image (I) wherein for example R1 is an alkyl group having 1 to 6 C atoms, cyclohexyl or benzyl, x is 2 or 3, R2 and R3 are each a methyl or ethyl grouy, or together with the N atom they form an N-heterocyclic ring, are obtained by adding, by means of an addition reaction, to 1 mol of a maleic acid monoester of the formula II Image (II) 1 mol of an amine of the formula III Image (III) . in the presence of a tertiary amine. The novel N-substiti- tuted aspartic acid monoesters are valuable curing accelerators for epoxide resin mixtures containing dicyan- diamide or a polycarboxylic acid anhydride as curing agent. They are also suitable alone as catalytically acting curing agents for epoxide resins.

351317

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