Polyurethane hot-melt adhesive, laminated body using same, and method for producing laminated body
US11697750B2 · kind B2 · utility
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Key dates
| Filing date | Jul 24, 2018 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Feb 27, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2475/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.