Process for the preparation of polyurethane foams employing poly

Details Process for the preparation of polyurethane foams employing poly Process for the preparation of polyurethane foams employing poly

1991-12-27

1993-01-12

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521157, 524724, 524759, 524761, 528 44, 528 48, 528 49, 528 52, 528 53, C08G 1814

Patent

active

051791315

ABSTRACT:
Addition of minor quantities of mono- or dicarboxylic acids to polyurethane foam formulations which employ polyisocyanate polyaddition polymer polyol dispersions prevents shrinkage and tightness in polyurethane foams prepared therefrom. If acid addition is made directly after dispersion preparation, reduction of polyol viscosity and more rapid stabilization against viscosity change is observed.

REFERENCES:
patent: 4374209 (1983-02-01), Rowlands

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