Novel enamines, obtained from aldehydes or ketones, may be incorporated into a white-wall tire stock to greatly enhance the ozone resistance of the stock while greatly reducing discoloration or staining of the stock. The aldehydes and ketones utilized are those having at least one alpha hydrogen linked to the carbonyl group.
Polyamide-polyurea containing polymers are disclosed that are derived from the reaction of (A) an organic polyisocyanate: (B) an organic compound having at least two active hydrogen containing groups; and (C) from 15 to 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) a particular enamine and (ii) an aromatic diamine and optionally (iii) an extender diol wherein the ratio of equivalents of (A) to total equivalents of (B) and (C) is within the range of from 0.90:1 to 1.10:1. The polymers find particular utility in the preparation of RIM parts having excellent physical properties. At the same time, the polymers are characterized by slower gel times than prior art aromatic diamine extended polymers thereby allowing the filling of larger molded parts.
Alkylation of enamines derived from sterically hindered amines
作者:Thomas J. Curphey、Jennie C. Y. Hung、Christine C. C. Chu
DOI:10.1021/jo00893a014
日期:1975.3
Reactions of silylcarbamates with ketones
作者:F Kardon、M Mörtl、D Knausz
DOI:10.1016/s0040-4039(00)01521-5
日期:2000.11
The reaction of N,N-dialkyl-O-trimethylsilyl carbamates with different carbonyl compounds gives enamines under mild conditions in good yields. (C) 2000 Elsevier Science Ltd. All rights reserved.
Huenig et al., Chemische Berichte, 1957, vol. 90, p. 2833,2838