Process for preparing a microcellular polyurethane foam with imp

Details Process for preparing a microcellular polyurethane foam with imp Process for preparing a microcellular polyurethane foam with imp

1981-11-30

1983-06-14

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521167, 521108, C08G 1814, C08G 1818, C08G 1824

Patent

active

043884202

ABSTRACT:
There is provided a process for preparing a microcellular foam with improved green strength properties comprising the step of reacting an organic polyisocyanate with polyalkylene ether polyol and from 1 to about 35 parts (by weight, per hundred parts of said polyol) of a chain extender in the presence of from about 0.1 to about 10.0 parts (by weight, per hundred parts of said polyol) of a compound selected from the group consisting of: ##STR1## wherein: (a) said polyol has an average functionality of from about 2 to about 8 and an average equivalent weight of from about 1000 to about 2700, and from about 0.8 to about 1.2 equivalents of said polyol are reacted per equivalent of isocyanate;

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patent: 4145318 (1979-03-01), Ohashi et al.
patent: 4273885 (1981-06-01), Dominguez et al.

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