Solvent-free-adhesive polyisocyanate composition, solvent-free adhesive, and method for producing multilayer film using the same
US10960642B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2018 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Feb 23, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2553/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a solvent-free-adhesive polyisocyanate composition, containing, a polyisocyanate (A) and an aromatic vinyl-maleic anhydride copolymer (B), which is a copolymer of aromatic vinyl and maleic anhydride in which a molar ratio [aromatic vinyl/maleic anhydride] of the raw material monomers of the copolymer is 1.5/1 to 5/1. Further provided is a method for producing the polyisocyanate composition; a solvent-free adhesive containing, the solvent-free-adhesive polyisocyanate composition and a polyol (Y); and a multilayer film obtained by laminating a first base material film, a second base material film, and an adhesive layer between the base material films, in which the adhesive layer is formed of the solvent-free adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.