Process for the preparation of urethane foam

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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Details

423494, C08G 1814, C08G 1824, C01G 100

Patent

active

045322627

ABSTRACT:
This invention comprises a process of making a polyurethane foam from polyisocyanates and polyols in the presence of bivalent tin carboxylate catalyst. The procedure consists of a novel method of preparation and hydrolysis of the tin catalyst. Stannous chloride prepared in the presence of at least 10% and up to 50% excess tin is used to prepare a desirable low viscosity stannous carboxylate.

REFERENCES:
patent: 3391091 (1968-07-01), Considine et al.
patent: 3476933 (1969-11-01), Mendelsohn
patent: 3887505 (1975-06-01), Demou et al.
patent: 4419461 (1983-12-01), Arbir et al.
patent: 4456696 (1984-06-01), Arbir et al.

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