Water-soluble film from copolymers of vinyl alcohol and itaconic acid, and paper coating articles therefrom
US7608661B2 · kind B2 · utility
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6References
8Claims
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Key dates
| Filing date | Mar 17, 2008 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Mar 17, 2028 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/60
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention is a composition useful for coating the surface of paper wherein the coating composition is an aqueous solution comprising less than 40 wt % water and consisting essentially of a polyvinyl alcohol copolymer that is at least about 95 % hydrolyzed, and a process for preparing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.