Refojo M F
Ann Ophthalmol. 1984 Nov;16(11):1009-13.
The siloxanyl alkyl methacrylate copolymers with methyl methacrylate and other components including hydrophilic monomers and crosslinking agents are used to make siloxane methacrylate oxygen-permeable rigid contact lenses. These copolymers contain the element silicon as siloxane bonds in side branches of the main polymer chain, which is made of carbon-to-carbon bonds. The siloxane bonds are the main contributing factor to the oxygen permeability of these materials. Because silicone is not a component of these contact lenses, it is not appropriate to refer to them as silicone methacrylate contact lenses. This paper analyzes data from three fundamental patents and gives the oxygen permeability coefficients of three types of siloxanyl alkyl methacrylate copolymers. In one type the siloxanyl component contains two silicon atoms, in the second type it contains three silicon atoms, and in the third type it contains four silicon atoms. A general relationship, expressed by a power function, is developed between the oxygen permeability coefficients of siloxanyl alkyl methacrylate copolymers and dimethylsilicone rubber and their percent disiloxane or silicon content.
含甲基丙烯酸甲酯以及包括亲水性单体和交联剂在内的其他成分的硅氧烷基甲基丙烯酸酯共聚物，被用于制造甲基丙烯酸酯硅氧烷透氧硬性隐形眼镜。这些共聚物在由碳 - 碳键构成的主聚合物链的侧支链中含有作为硅氧烷键的硅元素。硅氧烷键是这些材料透氧性的主要影响因素。由于硅酮并非这些隐形眼镜的成分，将它们称为甲基丙烯酸酯硅酮隐形眼镜并不恰当。本文分析了三项基础专利的数据，并给出了三种类型的硅氧烷基甲基丙烯酸酯共聚物的透氧系数。在一种类型中，硅氧烷基成分含有两个硅原子；在第二种类型中，它含有三个硅原子；在第三种类型中，它含有四个硅原子。通过幂函数表示的一种通用关系，在硅氧烷基甲基丙烯酸酯共聚物与二甲基硅橡胶的透氧系数及其二硅氧烷或硅含量百分比之间得以建立。
