Method for producing a rigid foamed synthetic resin
First Claim
1. 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, an C1-18 alkyl group or a C1-18 acyl group.
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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.
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Citations
10 Claims
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1. 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 1where 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, an C1-18 alkyl group or a C1-18 acyl group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Rf—
O—
(CH2CH2O)k.[CH2CH (CH3)O]m—
H
Formula 1awhere in the formula 1a, Rf is a C2-27 fluorine-containing organic group, and each of k and m which are independent of each other, is an integer of from 1 to 99, provided that k+m is from 2 to 100.
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7. The method for producing a rigid foamed synthetic resin according to claim 1, wherein the fluorine-containing compound is used in an amount of from 0.01 to 1 part by mass per 100 parts by mass of the total amount of the polyol and the polyisocyanate compound.
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8. The method for producing a rigid foamed synthetic resin according to claim 1, wherein water is used in an amount of from 4 to 16 parts by mass per 100 parts by mass of the polyol.
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9. The method for producing a rigid foamed synthetic resin according to claim 1, wherein as the polyol, a polyether polyol obtained by reacting an alkylene oxide with a bivalent to octavalent initiator and having a hydroxyl value of from 200 to 500 meq/g, is used.
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10. The method for producing a rigid foamed synthetic resin according to claim 1, wherein as the polyisocyanate compound, an aromatic polyisocyanate or its modified product is used.
Specification