Polyurethane froth foams

Details Polyurethane froth foams Polyurethane froth foams

1987-11-12

1988-07-12

Kight, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521164, 521167, 521173, 521174, 528 64, 528 66, 528 76, 528 85, 4284231, C08G 1830

Patent

active

047570962

ABSTRACT:
A process for the manufacture of a polyurethane froth foam is provided. The process, which comprises contacting a polyurethane forming formulation with an inert gas under conditions which produce a froth, uses a formulation which contains either (1) an aromatic amine having the formula ##STR1## wherein the R groups are independently selected from hydrogen or alkyl groups and the R.sup.1 and R.sup.2 groups are independently selected from hydrogen or hydroxyalkyl groups or (2) an alkoxylated bisphenol A. Optionally a second additive which is a linear glycol can also be used. The polyurethane froth foams produced are thermoformable while exhibiting good shape retention at ambient temperature.

REFERENCES:
patent: 3925266 (1975-12-01), Fabris et al.
patent: 4048105 (1977-09-01), Salisbury
patent: 4194070 (1980-03-01), Marquis et al.
patent: 4239700 (1980-12-01), Marquis et al.
patent: 4482690 (1984-11-01), Orphanides

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