Polymer membrane for water treatment and method for manufacture of same
US-9193815-B2 · Nov 24, 2015 · US
Modified polyvinyl alcohol and production method therefor
US9758601B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9758601-B2 |
| Application number | US-201415108155-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 25, 2014 |
| Priority date | Dec 26, 2013 |
| Publication date | Sep 12, 2017 |
| Grant date | Sep 12, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
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 ), R 1 represents a hydrogen atom or a methyl group.]
First claim
Opening claim text (preview).
The invention claimed is: 1. A modified polyvinyl alcohol comprising 0.1 to 10 mol % of a monomer unit represented by formula (1) and having a degree of polymerization exceeding 2000 and a content of a 1,2-glycol bond in a main chain of 1.5 mol % or less: wherein, in formula (1), R 1 represents a methyl group. 2. A method for producing the modified polyvinyl alcohol according to claim 1 , comprising copolymerizing a vinyl ester monomer with a compound represented by formula (2), followed by saponification wherein, in formula (2), R 1 is a methyl group, and R 2 represents an alkyl group having 1 to 10 carbon atoms.
Assignees
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Classifications
Vinyl acetate · CPC title
Polyvinyl alcohol {; Vinyl alcohol} · CPC title
with unsaturated alcohols containing three or more carbon atoms · CPC title
as molar percentages · CPC title
- C08F8/12Primary
Hydrolysis · CPC title
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- What does patent US9758601B2 cover?
- 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. …
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification C08F8/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 12 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).