| 摘要 |
Polymerizable monomer compositions, transparent polymer substrates and optical and ophthalmic articles obtained. The compositions according to the invention comprise 30 to 100% of one or more monomers (I) of formula: in which R1, R2, R' and R'' represent, independently of one another, a hydrogen atom or a methyl radical, Ra and Rb, which are identical or different, each represent an alkyl group having 1 to 10 carbon atoms, provided that Ra and Rb do not simultaneously represent a methyl group, and m and n are integers satisfying the relationship 2<=m+n<=20; 0 to 70% of at least one other polymerizable monomer (II) comprising one or more (meth)acrylate functional groups, other than the monomer (I), such that a transparent substrate resulting from the polymerization of the composition has a glass transition temperature satisfying the relationship 70° C.<=Tg<=110°C.; and at least one system for initiating the polymerization. Application to the manufacture of optical and ophthalmic articles.
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