申请人:Ciba-Geigy Corporation
公开号:US05508317A1
公开(公告)日:1996-04-16
The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is crosslinked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.5 to approximately 80% of units of formula I ##STR1## wherein R is lower alkylene having up to 8 carbon atoms, R.sup.1 is hydrogen or lower alkyl and R.sup.2 is an olefinically unsaturated, electron-attracting, copolymerisable radical preferably having up to 25 carbon atoms, to crosslinked polymers, either homo- or co-polymers of those novel prepolymers, to processes for the preparation of the novel prepolymers and the homo- and co-polymers obtainable therefrom, to mouldings made from the said homo- or co-polymers, especially contact lenses made from those homo- or co-polymers, and to processes for the manufacture of contact lenses using the said homo- or co-polymers.
本发明涉及一种新型的制造成型件的方法,特别是隐形眼镜,在该方法中,可交联基团的可溶性预聚物在溶液中交联,并且还涉及根据该方法获得的成型件,特别是隐形眼镜。本发明还涉及新型预聚物,可用于根据本发明的方法,特别是具有分子量至少约2000的聚乙烯醇的衍生物,根据聚乙烯醇的羟基数量,包含约0.5至约80%的式I的单元:其中R是具有最多8个碳原子的低烷基,R.sup.1是氢或低烷基,R.sup.2是烯烃不饱和,电子吸引,可共聚的基团,最好具有最多25个碳原子,交联聚合物,这些新型预聚物的同聚物或共聚物的制备方法以及从中获得的同聚物或共聚物制成的成型件,特别是由这些同聚物或共聚物制成的隐形眼镜,以及使用这些同聚物或共聚物制造隐形眼镜的方法。