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Patent Searching and Data


Title:
MOISTURE-CURABLE POLYURETHANE HOT MELT ADHESIVE AND MULTILAYER SHEET USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2008/065921
Kind Code:
A1
Abstract:
Disclosed is a moisture-curable polyurethane hot melt adhesive which contains a urethane prepolymer obtained by reacting a polyol (A) with a polyisocyanate (B). The polyol (A) contains, relative to the total mass thereof, 40-80% by mass of a polycarbonate polyol (a1), 5-40% by mass of a polytetramethylene glycol (a2), and 5-40% by mass of a polyester polyol (a3) which is obtained by reacting a polycarboxylic acid containing an aliphatic polycarboxylic acid and an aromatic polycarboxylic acid with a polyether polyol which is obtained by adding an alkylene oxide to bisphenol A. Also disclosed is a multilayer sheet using such a moisture-curablepolyurethane hot melt adhesive. This adhesive is capable of maintaining excellent adhesive strength even after repeated washing under stringent washing conditions, without deteriorating soft texture of the multilayer sheet.

Inventors:
KANAGAWA YOSHINORI (JP)
NIWA TOSHIO (JP)
TAMAKI TOSHIFUMI (JP)
Application Number:
PCT/JP2007/072359
Publication Date:
June 05, 2008
Filing Date:
November 19, 2007
Export Citation:
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Assignee:
DAINIPPON INK & CHEMICALS (JP)
KANAGAWA YOSHINORI (JP)
NIWA TOSHIO (JP)
TAMAKI TOSHIFUMI (JP)
International Classes:
C09J175/04; B32B27/00; C09J7/02; C09J175/06; C09J175/08
Foreign References:
JPH03167356A1991-07-19
JP2002327310A2002-11-15
JP2003049147A2003-02-21
JP2003246830A2003-09-05
JP2002327310A2002-11-15
JP2005290280A2005-10-20
Other References:
See also references of EP 2025730A4
Attorney, Agent or Firm:
FUKAMI, Hisao et al. (Nakanoshima Central Tower 22nd Floor,2-7, Nakanoshima 2-chome, Kita-k, Osaka-shi Osaka 05, JP)
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