Hydrophilic ampholytic polymer
US6361768B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1998 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/5428
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A novel hydrophilic ampholytic polymer synthesized by reacting polymerizable amino and carboxy functional ethylenically unsaturated monomers, together with a non-ionic hydrophilic monomer, to provide a polymer having a glass transition temperature (Tg) above about 50° C., and optionally hydrophobic monomer(s), and cross-linking monomer(s). The copolymer is precipitated from a polymerization media which includes a suitable organic solvent. The resulting copolymer is in the form of a fine powder, with submicron particle size. As such it is suitable for use as a thickener or rheology modifier in personal care formulations, such as shampoo, conditioner, and the like, as a bioadhesive, and for other pharmaceutical applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.