Moisture-curable polyurethane hot melt adhesive, and laminate and moisture-permeable film using the same
AssigneeDIC Corporation
InventorsYoshinori Kanagawa, Minoru Takahashi
Life of this patent
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Abstract
A moisture-curable polyurethane hot-melt adhesive containing a urethane prepolymer obtained by reacting a polyol (A) which comprises a polyester polyol (a-1) obtained by reacting a polyol prepared by the addition of bisphenol A with an alkylene oxide with both an aliphatic polycarboxylic acid and an aromatic polycarboxylic acid, a crystalline polyester polyol (a-2), and a polyoxyethylene glycol (a-3) having a number-average molecular weight of 2000 to 25000 with a polyisocyanate (B); and a moisture-permeable film, which are suitable for the production of sport wear, raincoats, shoes, fireman uniforms, military uniforms, and so on.
Claims20
A moisture-curable polyurethane hot melt adhesive comprising a urethane prepolymer which is obtained by reacting polyols (A) which comprise:
- a polyester polyol (a-1) obtained by reacting a polyol prepared by addition of alkylene oxide to bisphenol A, with an aliphatic polycarboxylic acid and an aromatic polycarboxylic acid;
- a crystalline polyester polyol (a-2);
- and
- a polyoxyethylene glycol (a-3) having a number average molecular weight of 2000 to 25000,
- with polyisocyanate (B).
A moisture-permeable film obtained by curing a moisture-curable polyurethane hot melt composition comprising a urethane prepolymer which is obtained by
- reacting polyols (A) which comprise:
- a polyester polyol (a-1) obtained by reacting a polyol prepared by addition of alkylene oxide to bisphenol A, with an aliphatic polycarboxylic acid and an aromatic polycarboxylic acid;
- a crystalline polyester polyol (a-2);
- and
- a polyoxyethylene glycol (a-3) having a number average molecular weight of 2000 to 25000,
- with polyisocyanate (B).
Dependencies are inferred from the claim text.