IP Library › Granted Patent US 7,449,438
Granted Patent B2
US 7,449,438 · App. 11/508,440 · Granted Nov 11, 2008

Foam premixes having improved processability

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Quick Facts
Patent No.
US 7,449,438
App. No.
11/508,440
Granted
Nov 11, 2008
Kind
B2
Abstract

A method for improving the processability of foam premixes containing HFC and/or pentane-based blowing agents in polyols is provided, which method comprises adding trans-1,2-dichloroethylene to said premix in an amount effective to enhance said processability.

Claims (2)

1. A method for improving the processability of foam premixes containing polyols and a hydrofluorocarbon blowing agent consisting of 1,1,1,2-tetrafluoroethane as the sole hydrofluorocarbon blowing agent, which method comprises adding trans-1,2-dichloroethylene to said foam premix in an amount effective to enhance said processability of the premix.

2. The method of claim 1 wherein the polyol is a polyester polyol.