# US 2014/0155509 A1 · Polyol composition for rigid polyurethane foam and production method for rigid polyurethane foam

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- Number: US 2014/0155509 A1
- Document ID: US20140155509A1
- Status: Published application
- Kind: A1
- Application number: 14/131,863
- Filed: 2012-06-12
- Published: 2014-06-05
- Earliest claimed: 2011-07-14
- Assignees: Toyo Tire & Rubber Co., Ltd.
- Inventors: Tsuguo Watanabe; Jun Akai
- Web page: https://patentgrep.com/patent/US20140155509A1

## CPC

- C08G 18/66: Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G 18/4812: {Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups}
- C08G 18/4837: {and other oxyalkylene units}
- C08G 18/6674: {with compounds of group C08G18/3203}
- C08G 18/6677: {having at least three hydroxy groups}
- C08J 9/02: using blowing gases generated by the reacting monomers or modifying agents during the preparation or modification of macromolecules
- C08G 2110/0025: rigid
- C08G 2110/005: < 50kg/m3
- C08G 2110/0083: prepared using water as the sole blowing agent
- C08J 2201/022: premixing or pre-blending a part of the components of a foamable composition, e.g. premixing the polyol with the blowing agent, surfactant and catalyst and only adding the isocyanate at the time of foaming
- C08J 2205/05: Open cells, i.e. more than 50% of the pores are open
- C08J 2205/10: Rigid foams
- C08J 2375/08: from polyethers
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

## Abstract

A polyol composition for a rigid polyurethane foam, which comprises polyol compounds, and water as a blowing agent, and which is mixed with a polyisocyanate component to react therewith, and thereby forming the rigid polyurethane foam, wherein the polyol compounds comprise a polyether polyol (A) which is a polymer made from an alkylene oxide and has an average functional group number of 2 to 4 and a weight-average molecular weight of 3000 to 8000, and a short glycol (B) having a molecular weight less than 250, and the water is contained in an amount of 20 to 100 parts by weight for 100 parts by weight of the polyol compounds.

## Claims

### Claim 1

A polyol composition for a rigid polyurethane foam, which comprises polyol compounds, and water as a blowing agent, and which is mixed with a polyisocyanate component to react therewith, and thereby forming the rigid polyurethane foam,
wherein the polyol compounds comprise a polyether polyol (A) which is a polymer made from an alkylene oxide and has an average functional group number of 2 to 4 and a weight-average molecular weight of 3000 to 8000, and a short glycol (B) having a molecular weight less than 250, and
the water is contained in an amount of 20 to 100 parts by weight for 100 parts by weight of the polyol compounds.

### Claim 2 (depends on 1)

The polyol composition for a rigid polyurethane foam according to claim 1, wherein the polyether polyol (A) is contained in an amount of 10 to 80 parts by weight for 100 parts by weight of the polyol compounds, and the short glycol (B) is contained in an amount of 10 to 60 parts by weight therefor.

### Claim 3 (depends on 1)

The polyol composition for a rigid polyurethane foam according to claim 1, wherein the polyol compounds further comprise a polyether polyol (C) which is a polymer made from propylene oxide and has an average functional group number of 2 to 4 and a weight-average molecular weight of 3000 to 5000.

### Claim 4

A production method for a rigid polyurethane foam, which is a method of mixing a polyol composition comprising polyol compounds and water as a blowing agent with a polyisocyanate component to react with each other, thereby forming the rigid polyurethane foam,
wherein the polyol compounds comprise a polyether polyol (A) which is a polymer made from ethylene oxide and propylene oxide and has an average functional group number of 2 to 4 and a weight-average molecular weight of 3000 to 8000, and a short glycol (B) having a molecular weight less than 250, and
the water is contained in an amount of 20 to 100 parts by weight for 100 parts by weight of the polyol compounds.

### Claim 5 (depends on 4)

The production method for a rigid polyurethane foam according to claim 4, wherein the polyether polyol (A) is contained in an amount of 10 to 80 parts by weight for 100 parts by weight of the polyol compounds, and the short glycol (B) is contained in an amount of 10 to 60 parts by weight therefor.

### Claim 6 (depends on 4)

The production method for a rigid polyurethane foam according to claim 4, wherein the polyol compounds further comprise a polyether polyol (C) which is a polymer made from propylene oxide and has an average functional group number of 2 to 4 and a weight-average molecular weight of 3000 to 5000.