Isocyanate composition and process for making flexible foams the

Details Isocyanate composition and process for making flexible foams the Isocyanate composition and process for making flexible foams the

1990-04-16

1991-12-03

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 67, C08G 1814

Patent

active

050701142

ABSTRACT:
The invention relates to a liquid isocyanate-containing prepolymer composition having an average isocyanate functionality greater than 2 and an NCO content of from 2 to 15% by weight, as obtainable by reacting an isocyanate reactive polymer having an average nominal functionality of from 2 to 6 with a stoichiometric excess of a diphenylmethane diisocyanate composition containing at least 2% by weight of 2,4'-diphenylmethane diisocyanate and having an average isocyanate functionality in the range from 2 to 2.3. The invention also relates to a method for preparing a polyurethane foam, which comprises reacting such a prepolymer composition with water.

REFERENCES:
patent: 4133014 (1978-09-01), Kubens et al.
patent: 4788269 (1988-11-01), Vu et al.

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