Contact lens made from polymers of polysiloxane and polycyclic esters of acrylic acid or methacrylic acid
US4254248A · kind A · utility
176Cited by
18References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Sep 13, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Monomeric polysiloxanes end-capped with activated unsaturated groups polymerized with a comonomer comprising a polycyclic ester of acrylic acid or methacrylic acid to form a soft contact lens is disclosed. These instant polysiloxane copolymer contact lenses have unexpectedly high tear strengths and unexpectedly high modulus of elasticity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.