Method for producing rigid polyurethane foam

Details Method for producing rigid polyurethane foam Method for producing rigid polyurethane foam

2007-10-23

2007-10-23

Cooney, Jr., John M. (Department: 1711)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S130000, C521S170000, C521S174000

Reexamination Certificate

active

10959112

ABSTRACT:
A method to produce a rigid polyurethane foam includes emulsifying a nucleating agent by mixing the nucleating agent with a polyol and a foam stabilizer, preparing a polyol mixture by mixing water, a catalyst, and a blowing agent at one of: before the emulsifying, during the emulsifying and after the emulsifying, and reacting the polyol mixture with a polyisocyanate.

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