Method for producing a molded product of integral-skin polyureth

Details Method for producing a molded product of integral-skin polyureth Method for producing a molded product of integral-skin polyureth

1990-06-13

1992-03-31

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 99, 521104, 521163, 521168, C08J 934, C08G 1808

Patent

active

051009226

ABSTRACT:
A method for producing a molded product of integral-skin polyurethane foam, which comprises reacting and curing (1) a high molecular weight polyol comprising, as the main component, a polyoxyalkylene polyol having, as the main constituent, oxyalkylene groups of at least 3 carbon atoms and oxyethylene groups at its molecular terminals with the overall oxyethylene group content being not higher than 15% by weight and having a hydroxyl value of not higher than 80, (2) a crosslinking agent containing a compound having an aromatic nucleus and at least two active hydrogen-containing groups selected from the group consisting of hydroxyl groups, primary amino groups and secondary amino groups, and (3) a polyisocyanate, in a mold in the presence of a catalyst and a hydrogen atom-containing halogenated hydrocarbon foaming agent.

REFERENCES:
patent: 3775350 (1973-11-01), Juhas
patent: 4211847 (1980-07-01), Kehr et al.
patent: 4559366 (1985-12-01), Hostettler
patent: 4605729 (1986-08-01), Barnes et al.

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