Method for producing a rigid foamed synthetic resin

Details Method for producing a rigid foamed synthetic resin Method for producing a rigid foamed synthetic resin

2005-05-03

2005-05-03

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...

C521S114000, C521S116000, C521S130000, C521S137000, C521S171000, C521S174000

Reexamination Certificate

active

06887913

ABSTRACT:
A method for producing a rigid foamed synthetic resin, which comprises reacting a polyol with a polyisocyanate compound in the presence of water, a catalyst and a fluorine-containing compound of the formula 1:in-line-formulae description="In-line Formulae" end="lead"?Rf—O-(A-O)n—R  Formula 1in-line-formulae description="In-line Formulae" end="tail"?where in the formula 1, Rfis a C2-27fluorine-containing organic group, n is an integer of from 1 to 100, A is an alkylene group having a carbon number in the straight chain portion between bonds of from 2 to 4, provided that when n is from 2 to 100, the plurality of A may be the same or different, and R is a hydrogen atom, a C1-18alkyl group or a C1-18acyl group.

REFERENCES:
patent: 4356273 (1982-10-01), Soch
patent: 5126379 (1992-06-01), Volkert et al.
patent: 5565497 (1996-10-01), Godbey et al.
patent: 6476114 (2002-11-01), Goeman et al.
patent: 60-199015 (1985-10-01), None

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