Method for producing a rigid foamed synthetic resin
AssigneeAsahi Glass Company, Limited
InventorsHiromichi Hotta, Hisashi Sato, Tadanobu Kuroki, Genichirou Enna
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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: Rf—O-(A-O)n—R Formula 1 where in the formula 1, Rf is a C2-27 fluorine-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 C1-18 alkyl group or a C1-18 acyl group.
Claims9
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:
- Rf—O-(A-O)n—R Formula 1
- wherein in the Formula 1, Rf is a C2-27 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 C1-18 alkyl group or a C1-18 acyl group.
Dependencies are inferred from the claim text.