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US 11,697,750 B2Granted
Polyurethane hot-melt adhesive, laminated body using same, and method for producing laminated body
AssigneeKuraray Co., Ltd.
InventorsMasato Warita, Akihisa Iwamoto, Michinori Fujisawa
Life of this patent
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Abstract
Disclosed is a polyurethane hot-melt adhesive including: a thermoplastic polyurethane that is a reactant of a raw material including a polymer polyol, a polyisocyanate, and a chain extender, wherein X−Y≥15, where X represents a temperature (° C.) at which the polyurethane hot-melt adhesive has a melt viscosity of 2.0×103 Pa·s, and Y represents a temperature at which the polyurethane hot-melt adhesive has a melt viscosity of 1.0×105 Pa·s, and the polyurethane hot-melt adhesive has a 100% modulus of 2.5 MPa or more.
Claims13
A polyurethane hot-melt adhesive, comprising:
- a thermoplastic polyurethane that is a reactant of a raw material comprising a polymer polyol, a polyisocyanate, and a chain extender,
- wherein the polymer polyol comprises at least two polymer polyols whose number-average molecular weights are different by 1000 or more,
- the polyurethane hot-melt adhesive satisfies X-Y≥15, where X represents a temperature (° C.) at which the polyurethane hot-melt adhesive has a melt viscosity of 2.0×103 Pa·s, and Y represents a temperature at which the polyurethane hot-melt adhesive has a melt viscosity of 1.0×105 Pa·s, and
- the polyurethane hot-melt adhesive has a 100% modulus of 2.5 MPa or more.
1 more element
Dependencies are inferred from the claim text.