Vinylpyrrolidone-based polymer composition
US7700674B2 · kind B2 · utility
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Key dates
| Filing date | Jul 31, 2007 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Apr 14, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3415
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a vinylpyrrolidone-based polymer composition which has improved storage stability and of which the reduction in the molecular weight (K value) under shear stress is small. The composition comprises a vinylpyrrolidone-based polymer and contains from 1 to 10000 ppm of at least one compound selected from a group consisting of biguanides and further contains from 1000 to 30000 ppm of 2-pyrrolidone and from 1 to 5000 ppm of ammonia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.