POLYURETHANE FOAM FOR SEAT PAD

Title:

POLYURETHANE FOAM FOR SEAT PAD

Document Type and Number:

WIPO Patent Application WO/2013/147088

Kind Code:

A1

Abstract:

A polyurethane foam for a seat pad, obtained by expansion molding a foaming stock solution comprising: (A) a polyol component which comprises (a-1) 30 to 55 mass% of a polyether polyol consisting of a block copolymer that is obtained by ring-opening polymerization of ethylene oxide (EO) and propylene oxide (PO) and that has a molar ratio of EO repeating units to PO repeating units of 5/95 to 25/75 and a number-average molecular weight of 6,000 to 8,000 and (a-2) 2 to 20 mass% of a polyether polyol consisting of a block copolymer that is obtained by ring-opening polymerization of EO and PO and that has a molar ratio of EO repeating units to PO repeating units of 30/70 to 90/10 and a glass transition temperature of -65°C or lower; and (B) a polyisocyanate component. This polyurethane foam for a seat pad combines reduced shakiness and reduced stress relaxation, ensures a comfortable ride, is free from problematic shakes, and exhibits little hardness increase even under low-temperature atmosphere.

Inventors:

YOSHITOMI KOSUKE (JP)
KAWAMURA AKIKO (JP)

Application Number:

PCT/JP2013/059388

Publication Date:

October 03, 2013

Filing Date:

March 28, 2013

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)
YOSHITOMI KOSUKE (JP)
KAWAMURA AKIKO (JP)

International Classes:

C08G18/48; C08G18/76; A47C7/18; A47C27/14; C08G101/00

Domestic Patent References:

WO2008050841A1	2008-05-02
WO2011132645A1	2011-10-27
WO2011132645A1	2011-10-27

Foreign References:

JP2004167233A	2004-06-17
JP2002535459A	2002-10-22
JP2001172356A	2001-06-26
JP2011506697A	2011-03-03
JP2008127514A	2008-06-05

Other References: