Ocular lens material
US5250583A · kind A · utility
15Cited by
3References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 9, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jun 9, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F226/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ocular lens material comprising a copolymer prepared by polymerizing a monomer mixture comprising, as main components, (A) 15 to 40% by mole of a fluoroalkyl (silicon-containing alkyl) fumarate, (B) 35 to 55% by mole of an N-vinyl lactam, (C) 3 to 30% by mole of at least one of acrylic acid and methacrylic acid, and (D) 0.1 to 20% by mole of a crosslinkable monomer. The ocular lens material is excellent in all of transparency, oxygen permeability, mechanical strength and hardness. Further, the material is excellent in hydrophilic property in spite of its low water absorption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.