发明名称 |
Polymeric materials, process for preparing them and shaped articles and contact lenses formed from them. |
摘要 |
<p>Polymeric materials suitable for bio-medical applications, particularly in making contact lenses, are derived by reaction of the following monomers in the given proportions: (1) 20 to 40 mole % of a polymerisable amide which is an unsubstituted or substituted amide of a carboxylic acid containing olefinic unsaturation. (2) 25 to 55 mole % of an N-vinyl lactam, (3) 5 to 20 mole % of a polymerisable ester which is an ester of a carboxylic acid containing olefinic unsaturation. (4) 1 to 10 mole % of a polymerisable carboxylic acid containing olefinic unsaturation, (5) 3 to 10 mole % of a polymerisable hydrophobic vinyl monomer, the amounts of the monomers (1) to (5) totalling 100 mole % and the copolymer being crosslinked with a crosslinking agent. The polymeric materials of the invention may be machined to form contact lenses and subsequently hydrated to form a hydrogel which is suitable for use as an extended wear contact lens.</p> |
申请公布号 |
EP0017512(A2) |
申请公布日期 |
1980.10.15 |
申请号 |
EP19800301136 |
申请日期 |
1980.04.09 |
申请人 |
KELVIN LENSES LIMITED |
发明人 |
TIGHE, BRIAN JOHN;GEE, HOWARD JAMES |
分类号 |
C08F220/54;C08F226/06;G02B1/04;(IPC1-7):08F226/06;08F220/54 |
主分类号 |
C08F220/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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