Hydratable siloxane comprising porous polymers
US6663668B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1999 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S623/926
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An hydratable porous polymer comprising a polymerized polyorganosiloxane macromonomer of formula IQ—[M—L]c—M—Q  (I)wherein c is in the range of from 0 to 5, preferably in the range of from 0 to 3;M may be the same or different and is a difunctional block of molecular weight in the range of from 100 to 8000 and wherein at least one M comprises a residue from a difunctional polymer or copolymer comprising siloxane repeat units of formula II where R1 and R2 may be the same or different and are selected from the group consisting of hydrogen, optionally substituted alkyl, alkenyl, alkynyl, aryl, haloalkyl, haloalkenyl, haloalkynyl, haloaryl, heterocyclyl, and haloheterocyclyl;L is a difunctional group;and Q may be the same or different and is a polymerizable group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.