Title:
METHOD FOR PRODUCING POLYURETHANE FOAM SHEET AND METHOD FOR PRODUCING SYNTHETIC LEATHER
Document Type and Number:
WIPO Patent Application WO/2023/199561
Kind Code:
A1
Abstract:
A method for producing a polyurethane foam sheet, the method including: applying, in the form of a sheet to a substrate, a mixture obtained by mixing a moisture-curable polyurethane hot-melt resin composition (X) containing a urethane prepolymer (i), which is a reaction product of a polyol (A) and a polyisocyanate (B), and a polyol composition (Y); and bringing the sheet-form mixture into contact with water vapor to induce foaming of the mixture using the water, wherein the method is characterized in that the polyol (A) contains a polytetramethylene glycol or polycarbonate polyol (a1) and a polyol (a2) having a structure derived from an alkylene oxide addition product of bisphenol A, and the polyol composition (Y) contains an amine catalyst (y1) having a foaming constant (Kw) of 10 or higher.
Inventors:
KANAGAWA YOSHINORI (JP)
CHIJIWA HIROYUKI (JP)
TAKENAKA MASAMI (JP)
CHIJIWA HIROYUKI (JP)
TAKENAKA MASAMI (JP)
Application Number:
PCT/JP2023/000509
Publication Date:
October 19, 2023
Filing Date:
January 12, 2023
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C08G18/00; C08G18/44; C08G18/48
Domestic Patent References:
| WO2008065920A1 | 2008-06-05 | |||
| WO2017163863A1 | 2017-09-28 |
Foreign References:
| JP2019085656A | 2019-06-06 | |||
| JP2004216880A | 2004-08-05 | |||
| JP2007063510A | 2007-03-15 | |||
| JP2015063579A | 2015-04-09 | |||
| JP2005068172A | 2005-03-17 |
Attorney, Agent or Firm:
ONO Takayuki (JP)
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