Process for the production of a rigid polyurethane foam and a co

Details Process for the production of a rigid polyurethane foam and a co Process for the production of a rigid polyurethane foam and a co

1997-08-08

1998-07-28

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, C08J 914

Patent

active

057864004

ABSTRACT:
The present invention relates to a method of producing a rigid polyurethane foam in which a polyisocyanate containing a benzene ring is used as an organic isocyanate and a polyether polyol and/or polyester polyol is used as a polyol, characterized in that a hydrocarbon is used as the blowing agent and a compound having a hydrophobic group and a hydroxyl group in the molecule is used as an emulsifying agent. The blowing agent is preferably a hydrocarbon selected from the group consisting of cyclopentane, n-pentane and iso-pentane.

REFERENCES:
patent: 5451615 (1995-09-01), Birch
patent: 5624969 (1997-04-01), Seifert et al.
patent: 5684092 (1997-11-01), Seifert et al.

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