N-Substituted aspartic acid derivatives as curing agents for epo

Details N-Substituted aspartic acid derivatives as curing agents for epo N-Substituted aspartic acid derivatives as curing agents for epo

1980-04-30

1981-08-18

Nielsen, Earl A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528114, 528328, 560 38, 560 39, 560 44, 560145, 560169, C08G 5952

Patent

active

042847559

ABSTRACT:
N-Substituted aspartic acid monoesters of the formula ##STR1## wherein for example R.sub.1 is an alkyl group having 1 to 12 C atoms, a cyclohexyl, phenyl, tolyl or benzyl group, R.sub.2 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 ##STR2## 1 mol of an amine of the formula

REFERENCES:
patent: 2761874 (1956-09-01), Bersworth et al.
patent: 2989498 (1961-06-01), MacKenzie et al.
patent: 4026915 (1977-05-01), Billman et al.
Laliberte et al., "Improved Synthesis of N-Alkyl-aspartic Acids", Canadian J. Chem. 40, 163-165, (1962).
Zilkha et al., "Synthesis of N-Alkyl-aspartic Acids and N-Alkyl-asparagines", J. Org. Chem. 24, 1096-1098, (1959).

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