Modified polyvinyl alcohol and production method therefor
US9758601B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Dec 25, 2014 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Dec 25, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2800/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a modified polyvinyl alcohol containing 0.1 to 10 mol % of a monomer unit represented by formula (1) below and having a degree of polymerization exceeding 2000. This provides a modified polyvinyl alcohol an aqueous solution of which foams less and which has excellent film strength and gas barrier properties under high humidity conditions, while having excellent water solubility.[In formula (1), R1 represents a hydrogen atom or a methyl group.]
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.