Process for the manufacture of polyurethane elastomers

Details Process for the manufacture of polyurethane elastomers Process for the manufacture of polyurethane elastomers

1991-11-29

1992-10-27

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524780, 524786, 524788, 528 55, C08L 7504

Patent

active

051590123

ABSTRACT:
An improved process for the manufacture of polyurethane elastomers from a reaction mixture which comprises a polyol, an isocyanate, water, a bismuth catalyst and an optional filler. In the improved process of this invention, the rate of reaction is decreased by the addition of water to the reaction mixture and increased by the removal of water from the reaction mixture.

REFERENCES:
patent: 3664863 (1972-05-01), Dijkhuizen et al.
patent: 3705834 (1972-12-01), Terry
patent: 3816339 (1974-06-01), Raden
patent: 4041019 (1977-08-01), McGraw et al.
patent: 4097424 (1978-06-01), Blount
patent: 4153777 (1979-05-01), Slagel
patent: 4184031 (1980-01-01), Graham et al.
patent: 4293679 (1981-10-01), Cogliano
patent: 4699968 (1987-10-01), Kay et al.

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