Title:
METHOD FOR PRODUCING SOFT POLYURETHANE FOAM
Document Type and Number:
WIPO Patent Application WO/2008/050841
Kind Code:
A1
Abstract:
Disclosed is a method for producing a soft polyurethane foam without using a plasticizer, which soft polyurethane foam is excellent in low rebound resilience and durability, while exhibiting less hardness change due to temperature change and having high air permeability. Specifically disclosed is a method for producing a soft polyurethane foam which is characterized in that a polyol mixture is reacted with a polyisocyanate compound in the presence of a foaming agent, a foam control agent and the like at an isocyanate index of not less than 90. The polyol mixture contains a polyol (A) which is composed of a polyether polyol having an average number of hydroxyl groups of 2-3, a hydroxyl number of 10-60 mgKOH/g and an oxyethylene content of 0-30% by mass, a polyol (B) which is composed of a polyether polyol having an average number of hydroxyl groups of 2-3 and a hydroxyl number of 70-250 mgKOH/g, and a monool (D) which is composed of a polyether monool having a hydroxyl number of 10-200 mgKOH/g. The polyol (A) is obtained by ring-opening polymerization of an alkylene oxide using a phosphazene compound, Lewis acid compound or alkali metal compound catalyst as an initiator.
Inventors:
SASAKI TAKAYUKI (JP)
KAKU DAISUKE (JP)
ITO TAKASHI (JP)
KUMAGAI NAOHIRO (JP)
KAKU DAISUKE (JP)
ITO TAKASHI (JP)
KUMAGAI NAOHIRO (JP)
Application Number:
PCT/JP2007/070839
Publication Date:
May 02, 2008
Filing Date:
October 25, 2007
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
SASAKI TAKAYUKI (JP)
KAKU DAISUKE (JP)
ITO TAKASHI (JP)
KUMAGAI NAOHIRO (JP)
SASAKI TAKAYUKI (JP)
KAKU DAISUKE (JP)
ITO TAKASHI (JP)
KUMAGAI NAOHIRO (JP)
International Classes:
C08G18/48; C08G101/00
Foreign References:
| JP2004300352A | 2004-10-28 | |||
| JP2002293867A | 2002-10-09 | |||
| JP2004527623A | 2004-09-09 | |||
| JP2006282936A | 2006-10-19 | |||
| JP2006249270A | 2006-09-21 | |||
| JPH11286566A | 1999-10-19 | |||
| JP2004002594A | 2004-01-08 | |||
| JP2004043561A | 2004-02-12 | |||
| JPH09151234A | 1997-06-10 | |||
| JP2004300352A | 2004-10-28 | |||
| JP2003522235A | 2003-07-22 | |||
| JP2004530767A | 2004-10-07 | |||
| JP2006063254A | 2006-03-09 | |||
| JPS4627250B1 | 1971-08-07 |
Other References:
See also references of EP 2077287A4
Attorney, Agent or Firm:
SENMYO, Kenji et al. (SIA Kanda Square17, Kanda-konyacho,Chiyoda-k, Tokyo 35, JP)
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