Zwitterionic siloxane polymers and ionically cross-linked polymers formed therefrom
US6124490A · kind A · utility
36Cited by
14References
16Claims
0Family size
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Key dates
| Filing date | Oct 26, 1999 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Oct 26, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Ionically cross-linked silicone polymers of a thickened gel-like consistency are made by reacting a diamino containing polysiloxane with an acid containing reactant selected from itaconic acid or the ester derivative thereof; substituted or unsubstituted cyclic and ankydride; substituted or unsubstituted conjugated olefinic acid or mixtures of the same at an elevated temperature in the presence of a low molecular weight silicone oil or other solvent until an ionically cross-linked zwitterionic siloxane polymer of a gel-like consistency is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.