Preparation of fine-cell rigid polyurethane foam using amine cat

Details Preparation of fine-cell rigid polyurethane foam using amine cat Preparation of fine-cell rigid polyurethane foam using amine cat

1988-12-22

1990-03-20

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, C08G 1814

Patent

active

049102303

ABSTRACT:
A fine-cell rigid polyurethane foam is prepared by reacting a polyol having a blowing agent such as water incorporated therein with a polyisocyanate in the presence of an amine catalyst having a retarding effect. The amine catalyst is comprised of (a) 30 to 50 parts by weight of triethylene diamine, (b) 30 to 50 parts by weight of bis(dimethylaminoethyl)ether and/or N,N',N",N"-pentamethyldiethylene triamine, (c) up to 40 parts by weight of tetramethylhexamethylene diamine and/or trimethylaminoethylpiperazine, and (d) formic acid in an amount of 0.2 to 1.5 moles per mole of triethylene diamine.

REFERENCES:
patent: 4617286 (1986-10-01), Arai et al.

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