Process for the production of highly elastic polyurethane foams

Details Process for the production of highly elastic polyurethane foams Process for the production of highly elastic polyurethane foams

1977-06-06

1978-08-08

Rzucidlo, Eugene C.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521904, 521917, 521124, 521174, 521167, C08G 1814

Patent

active

041055950

ABSTRACT:
The instant invention relates to an improved process for the production of cold-hardening polyurethane foams through the reaction of modified polyisocyanates with compounds having at least two active hydrogen atoms in the presence of blowing agents. The improved process is characterized by the fact that the modified polyisocyanate is prepared in a preliminary stage immediately before foaming.

REFERENCES:
patent: 2779689 (1975-06-01), Reis, Jr.
patent: 3741917 (1975-06-01), Morehouse
patent: 3887483 (1975-06-01), Morehouse
"Continuous Preparation of Urethane Foam Prepolymer", by Knox; Dupont Tech. Bul. HR-29, Jul., 1958.

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