Amphoteric copolymer derived from vinylpyridine and acetoxystyrene
US5304610A · kind A · utility
5Cited by
6References
1Claims
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Key dates
| Filing date | Apr 2, 1993 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Apr 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/0471
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A unique polymer was synthesized via copolymerization of vinylpyridine and acetoxystyrene under radical-initiated conditions followed by acidic or basic hydrolysis of the acetoxy group to afford the corresponding hydroxy group. The built-in acid-base dual functionality (phenolic and pyridyl units) in this polymer backbone gives rise to its unique solubility properties over a wide pH range in both aqueous and non-aqueous media. Due to its amphoteric nature, this polymer finds application as an anti-stat, viscosity modifier, and/or ion-exchange resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.