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US 6,649,084 B2Granted
Polyisocyanate curing agent for laminate adhesive, and laminate adhesive using the same
AssigneeNippon Polyurethane Industry Co., Ltd.
InventorsYukihiro Morikawa, Ichiro Higashikubo, Kouji Yoshida, Toshiaki Sasahara
Life of this patent
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Abstract
A polyisocyanate curing agent comprising an isocyanate group-terminated prepolymer and a silane coupling agent represented by formula (2), OCN—(CH2)x—Si(OR′)3 (2) wherein R is an alkyl group having 1 to 5 carbon atoms and m and n is each an integer of 1 or more; and an adhesive for forming laminates based on the above polyisocyanate curing agent and an active hydrogen-group containing resin.
Claims10
A polyisocyanate curing agent for laminate adhesive, comprising:
- (A) an isocyanate group-terminated prepolymer obtained by reacting an organic polyisocyanate containing at least one of (c) an aliphatic polyisocyanate or an alicyclic polyisocyanate, with (a) a block polyether monool represented by the following formula (1) wherein the oxypropylene group content is larger on a weight basis than the oxyethylene group content, and
- (B) a silane coupling agent represented by the following formula (2):
- (wherein R is an alkyl group having 1 to 5 carbon atoms, and m and n are each an integer of 1 or more):
- OCN—(CH2)r—Si(OR′)3 (2)
- (wherein R′ is a methyl group or an ethyl group, and r is an integer of 1 to 5).
2 more elements
A polyisocyanate curing agent for laminate adhesive, comprising:
- (A′) an isocyanate group-terminated prepolymer obtained by reacting an organic polyisocyanate containing at least one of (c) an aliphatic polyisocyanate or an alicyclic polyisocyanate, with (a) a block polyether monool represented by the following formula (1) wherein the oxypropylene group content is larger on a weight basis than the oxyethylene group content and (b) an active hydrogen group-containing aliphatic compound other than the compound (a), and
- (B) a silane coupling agent represented by the following formula (2):
- (wherein R is an alkyl group having 1 to 5 carbon atoms, and m and n are each an integer of 1 or more):
- OCN—(CH2)r—Si(OR′)3 (2)
- (wherein R′ is a methyl group or an ethyl group, and r is an integer of 1 to 5).
2 more elements
Dependencies are inferred from the claim text.