Patent ID: 6887913

Claim:
A method for producing a closed cell rigid foamed synthetic resin, comprising: reacting a polyol with a polyisocyanate compound in the presence of 4-16 parts by mass of only water as a blowing agent, based on 100 parts by mass of the polyol, a catalyst, and a fluorine-containing compound of the Formula 1: R f â€”O-(A-O) n â€”Râ€ƒâ€ƒFormula 1 wherein in the Formula 1, R f is a C 2-27 polyfluoroalkyl group or a group containing an oxygen atom or a nitrogen atom in a carbon-carbon bond of said polyfluoroalkyl 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, an C 1-18 alkyl group or a C 1-18 acyl group.