Process for preparing integral skin polyurethane and polyurethan

Details Process for preparing integral skin polyurethane and polyurethan Process for preparing integral skin polyurethane and polyurethan

1980-03-10

1981-09-29

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521124, 521128, 521129, C08G 1814

Patent

active

042924111

ABSTRACT:
An improved process for preparing integral skin polyurethane, wherein a reaction mixture comprising polyol, polyisocyanate the NCO groups of which are not directly bonded to an aromatic group, no more than 0.5 part by weight of water to 100 parts by weight of polyol, and a catalyst is reacted in a mould, said improvement consisting in using as catalyst a synergistic combination of at least one organic initiator, comprising at least one functional group of primary or secondary amines, with at least one organic compound of bismuth.

REFERENCES:
patent: 3235518 (1966-02-01), Hostettler et al.
patent: 3714077 (1973-01-01), Cobbledick et al.
patent: 4150206 (1979-04-01), Jourquin et al.
patent: 4189542 (1980-02-01), Kleinmann et al.

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