Vinyl alcohol copolymers for use in aqueous dispersions and melt extruded articles
US7786229B2 · kind B2 · utility
7Cited by
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25Claims
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Key dates
| Filing date | Jun 7, 2005 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Jun 8, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2329/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A product comprising a cold water soluble film wherein: a) the film comprises a copolymer of vinyl alcohol (VOH) with a minor amount of 2-acrylamido-2-methyl propane sulfonic acid in free acid form or as a salt of the free acid (AMPS); and b) the film has a harsh chemical dissolution time of less than about 80 seconds measured by the harsh chemical dissolution test method after 8 weeks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.