PROCESS FOR PRODUCING POLYURETHANE FOAM, POLYURETHANE FOAM, AND ABRASIVE SHEET

Title:

PROCESS FOR PRODUCING POLYURETHANE FOAM, POLYURETHANE FOAM, AND ABRASIVE SHEET

Document Type and Number:

WIPO Patent Application WO/2001/096434

Kind Code:

A1

Abstract:

A process for producing a finely cellular polyurethane foam by mixing a first ingredient comprising an isocyanate compound with a second ingredient comprising a compound containing an active hydrogen group, characterized by comprising adding a nonionic silicone surfactant containing no hydroxyl group to at least one of the first and second ingredients in an amount of 0.1 to 5 wt.%, excluding 5 wt.%, based on the total amount of the first and second ingredients, subsequently agitating the surfactant-containing ingredient together with an unreactive gas to disperse the unreactive gas as fine bubbles to prepare a bubble dispersion, and then mixing the bubble dispersion with the remaining ingredient to cure the resultant mixture. Thus, a polyurethane foam having uniform fine cells and a higher hardness than ones having the same density can be produced without using a chemically reactive blowing agent such as water, vaporizable expandable blowing agent such as a fluorocarbon, or other substance such as a finely particulate hollow foam or solvent-soluble substance.

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Inventors:

SEYANAGI HIROSHI (JP)
INOUE KAORU (JP)
OGAWA KAZUYUKI (JP)
MASUI TAKASHI (JP)
ONO KOICHI (JP)

Application Number:

PCT/JP2001/004831

Publication Date:

December 20, 2001

Filing Date:

June 07, 2001

Export Citation:

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Assignee:

TOYO TIRE & RUBBER CO (JP)
TOYO BOSEKI (JP)
SEYANAGI HIROSHI (JP)
INOUE KAORU (JP)
OGAWA KAZUYUKI (JP)
MASUI TAKASHI (JP)
ONO KOICHI (JP)

International Classes:

B24D3/28; B24D11/00; C08J9/00; C08J9/30; (IPC1-7): C08G18/10; C08J9/02

Foreign References:

JP2000178374A	2000-06-27
JPH11302355A	1999-11-02
US4927861A	1990-05-22
JPH0812794A	1996-01-16

Attorney, Agent or Firm:

Suzuki, Takao (Nishinakajima 7-chome Yodogawa-ku Osaka-shi, Osaka, JP)

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