Hydrophilized polydiorganosiloxane vinylic crosslinkers and uses thereof
US10246543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2018 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Aug 23, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a hydrophilized polydiorganosiloxane vinylic crosslinker which comprises (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and hydrophilized siloxane units each having one methyl substituent and one monovalent C4-C40 organic radical substituent having two to six hydroxyl groups, wherein the molar ratio of the hydrophilized siloxane units to the dimethylsiloxane units is from about 0.035 to about 0.15, and (2) two terminal (meth)acryloyl groups. The hydrophilized polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 3000 Daltons to about 80,000 Daltons. The present invention is also related to a silicone hydrogel contact lens, which comprises repeating units derived from a hydrophilized polydiorganosiloxane vinylic crosslinker of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.