Invention Grant
- Patent Title: Moisture-curable polyurethane hot melt adhesive and multilayer sheet using the same
- Patent Title (中): 水溶性聚氨酯热熔胶和使用其的多层片
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Application No.: US12302237Application Date: 2007-11-19
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Publication No.: US07641968B2Publication Date: 2010-01-05
- Inventor: Yoshinori Kanagawa , Toshio Niwa , Toshifumi Tamaki
- Applicant: Yoshinori Kanagawa , Toshio Niwa , Toshifumi Tamaki
- Applicant Address: JP Tokyo
- Assignee: DIC Corporation
- Current Assignee: DIC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Darby & Darby P.C.
- Priority: JP2006-325683 20061201
- International Application: PCT/JP2007/072359 WO 20071119
- International Announcement: WO2008/065921 WO 20080605
- Main IPC: B32B7/12
- IPC: B32B7/12 ; C09J4/00

Abstract:
There are provided a moisture-curable polyurethane hot melt adhesive containing a urethane prepolymer obtained by reacting a polyol (A) with a polyisocyanate (B), wherein the polyol (A) contains 40 to 80 mass % of a polycarbonate polyol (a1), 5 to 40 mass % of polytetramethylene glycol (a2), and 5 to 40 mass % of a polyester polyol (a3) obtained by reacting a polycarboxylic acid containing an aliphatic polycarboxylic acid and an aromatic polycarboxylic acid with a polyether polyol obtained by adding an alkylene oxide to bisphenol A, based on the total amount of the polyol (A), and a multilayer sheet using this adhesive. This adhesive can maintain excellent adhesion strength even after washing is repeatedly performed under stringent washing conditions without impairing soft texture of a multilayer sheet.
Public/Granted literature
- US20090208759A1 MOISTURE-CURABLE POLYURETHANE HOT MELT ADHESIVE AND MULTILAYER SHEET USING THE SAME Public/Granted day:2009-08-20
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