发明名称 |
Process for thermoformed articles |
摘要 |
A process for preparing shaped articles and shaped hydrogel articles including ophthalmic devices comprises the steps of preparing a polymer or copolymer comprising units derived from an ethylenically-unsaturated monomer bearing at least one trihaloacetoxy-substituent group, thermoforming said polymer by heating in a mold or in sheet-form at a temperature in the range of 100 DEG to 400 DEG C. for about 5 seconds to 15 minutes, and then cooling said polymer, to provide a shaped article, optionally, solvolyzing the resulting shaped article to provide a hydroxy-substituted polymeric shaped article, and optionally hydrating said hydroxy-substituted polymeric shaped article to provide a shaped hydrogel article.
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申请公布号 |
US4673539(A) |
申请公布日期 |
1987.06.16 |
申请号 |
US19850735379 |
申请日期 |
1985.05.17 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
HAMMAR, W. JAMES;OFSTEAD, RONALD F. |
分类号 |
C08L31/02;G02B1/04;(IPC1-7):B29D11/00 |
主分类号 |
C08L31/02 |
代理机构 |
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代理人 |
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地址 |
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