Process for producing froth polyurethane foam

Details Process for producing froth polyurethane foam Process for producing froth polyurethane foam

1996-10-18

1999-01-12

Gorr, Rachel

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521917, 4284233, 4283044, 264 451, C08G 1800

Patent

active

058590811

ABSTRACT:
High quality, consistent polyurethane froth foams, both filled and unfilled, are prepared by directing polyol, isocyanate, and optionally other polyurethane-forming ingredients to a high pressure mix head prior to introducing the mixture to a froth foaming head. Changes in stoichiometry may be made rapidly without shut-down. An in-line blender incorporated filler into the polyol stream minimizing density differentials normally encountered in the holding tank, maintaining low and reproducible viscosity, and allowing for greater amounts of filler than otherwise possible.

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"Methanically Frothed Urethane: A New Process For Controlled Gauge, High Density Foam", L. Martin et al., J. Cell Plas., v. 11, No. 6, Nov./Dec. 1975.

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