Method for producing a rigid foamed synthetic resin

• US 20030032688A1
• Filed: 07/18/2002
• Published: 02/13/2003
• Est. Priority Date: 07/18/2001
• Status: Active Grant

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Enna, Genichirou, Sato, Hisashi, Hotta, Hiromichi, Kuroki, Tadanobu
• Granted Patent: US 6,887,913 B2
• Time in Patent Office: Days
• US Class Current: 521/130
• CPC Class Codes: C08G 18/2885 containing halogen atoms
• CPC Class Codes: C08G 18/4829 Polyethers containing at least three hydroxy groups C08G18/4833 - C08G18/5096 take precedence
• CPC Class Codes: C08G 18/4883 containing cyclic groups having at least one oxygen atom in the ring
• CPC Class Codes: C08G 18/5027 directly linked to carbocyclic groups
• CPC Class Codes: C08G 2110/0025 rigid
• CPC Class Codes: C08G 2110/005 < 50kg/m3
• CPC Class Codes: C08G 2110/0083 prepared using water as the sole blowing agent
• CPC Class Codes: C08J 2205/10 Rigid foams
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 2471/00 Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08J2459/00; of epoxy resins C08J2463/00; of polythioether-ethers C08J2481/02; of polyethersulfones C08J2481/06; Derivatives of such polymers
• CPC Class Codes: C08J 9/0019 halogenated
• CPC Class Codes: C08J 9/0061 characterized by the use of several polymeric components
• CPC Class Codes: C08K 5/06 Ethers; Acetals; Ketals; Ortho-esters
• CPC Class Codes: C08L 75/04 Polyurethanes

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:

R^f—O—(A-O)_n—R  Formula 1

where in the formula 1, R^f is a C_2-27 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 C_1-18 alkyl group or a C_1-18 acyl group.

Claims

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:

R^f—

O—

(A-O)_n—

R 

 

Formula 1

where in the formula 1, R^f is a C_2-27 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 C_1-18 alkyl group or a C_1-18 acyl group.

2. The method for producing a rigid foamed synthetic resin according to claim 1, wherein only water is used as a blowing agent.

3. The method for producing a rigid foamed synthetic resin according to claim 1, wherein R in the formula 1 is a hydrogen atom.

4. The method for producing a rigid foamed synthetic resin according to claim 1, wherein n in the formula 1 is from 2 to 100.

5. The method for producing a rigid foamed synthetic resin according to claim 1, wherein R^f in the formula 1 is a C_2-27 polyfluoroalkyl group.

6. The method for producing a rigid foamed synthetic resin according to claim 1, wherein the fluorine-containing compound is represented by the formula 1a:

R^f—

O—

(CH₂CH₂O)_k.[CH₂CH (CH₃)O]_m—

H 

 

Formula 1a

where in the formula 1a, R^f is a C_2-27 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.

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.

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.

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.

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.