Hydrolyzed dialkyl dicarbonates as blowing agents for polymers

Details Hydrolyzed dialkyl dicarbonates as blowing agents for polymers Hydrolyzed dialkyl dicarbonates as blowing agents for polymers

1992-02-03

1992-08-18

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 82, 521 94, 521 97, 521130, 521178, 521181, 521182, C08J 908

Patent

active

051400529

ABSTRACT:
An improved method of using polymer compositions to produce foamed plastics, wherein a major, auxiliary source of blowing agent for the foam is the decomposition of dialkyl dicarbonates. The dialkyl dicarbonates can be decomposed over temperatures ranging from about 10.degree. C. to about 45.degree. C. when used in combination with particular tertiary amine decomposition catalysts. Enhanced production of carbon dioxide is obtained by the addition of water.

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patent: 4070310 (1978-01-01), Schneider et al.
patent: 4110273 (1978-08-01), Cohen
patent: 4297442 (1981-10-01), Blahak
patent: 4983320 (1991-01-01), Franklin et al.
patent: 5030664 (1991-07-01), Franklin et al.
patent: 5086083 (1992-02-01), Franklin et al.
"Analysis of the Rate of Degradation of Diethyl Dicarbonate By Gas Chromatography" by Drozd et al., vol. 40 (1975)-Journal of Food Science-1109.

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