发明名称 |
Hydrogel from ultraviolet-initiated copolymerization |
摘要 |
In the particular embodiment described in the specification, a contact lens hydrogel is prepared by copolymerizing 75 parts of N-vinyl pyrrolidone and 23 parts of phenyl ethyl methacrylate together with allyl methacrylate as a crosslinker, t-butyl peroctoate as a thermal initiator and 2,2-dimethoxy-2-phenylacetophenone or benzoin methyl ether as a photoinitiator. The mixture is maintained at a temperature of 5 DEG C. and protected from light prior to photopolymerization which is carried out under ultraviolet radiation. The copolymer is then post-cured thermally. Cloudy or hazy hydrogels are avoided by preventing prepolymerization of the mixture.
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申请公布号 |
US4620954(A) |
申请公布日期 |
1986.11.04 |
申请号 |
US19850742545 |
申请日期 |
1985.06.07 |
申请人 |
CIBA VISION CARE CORP. |
发明人 |
SINGER, HELMUT;BELLANTONI, ELLEN;LEBOEUF, ALBERT R. |
分类号 |
B29D11/00;G02B1/04;(IPC1-7):C08J3/00 |
主分类号 |
B29D11/00 |
代理机构 |
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地址 |
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