Polyisocyanate curing agent for laminate adhesive laminate adhesive comprising the same and its use
AssigneeNippon Polyurethane Industry Co., Ltd.
InventorsYukihiro Morikawa, Toshiaki Sasahara, Shin Konishi
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Abstract
A polyisocyanate curing agent for a laminate adhesive, which comprises a hydrophilic polar group-containing polyisocyanate; a laminate adhesive excellent in heat-resistance, durability and adhesiveness to polyolefin film which adhesive comprises the above hydrophilic polar group-containing polyisocyanate and an active hydrogen-containing compound; and use of an adhesive comprising the above polyisocyanate curing agent and an active hydrogen-containing compound in film lamination.
Claims12
A laminate adhesive for a flexible laminate, said laminate adhesive consisting essentially of (1) an active hydrogen-containing polyurethane resin, and (2) a hydrophilic polar group-containing polyisocyanate obtained by reacting an organic polyisocyanate with a polyoxyalkylene ether mono-ol, a polyoxyalkylene ether polyol or a polyoxyalkylene-fatty acid ester mono-ol, each of which contains ethylene oxide unit in a proportion of at least 50 mole %, said laminate adhesive retaining flexibility upon curing.
A polyisocyanate curing agent for a laminate adhesive which comprises a hydrophilic polar group-containing polyisocyanate obtained by reacting an organic polyisocyanate with a polyoxyalkylene ether mono-ol, a polyoxyalkylene ether polyol or a polyoxyalkylene-fatty acid ester mono-ol, each of which contains ethylene oxide unit in a proportion of at least 50 mole %.
Dependencies are inferred from the claim text.