An interpenetrating polymer network (IPN) composition and a process for the manufacture of hydrogel contact lens using the invention material. The polymeric materials are formed by polymerization of: (1) an unsaturated alkyl(meth)acrylate or its derivatives such as 2-hydroxyethyl methacrylate as the principle monomer; (2) optionally vinyl containing comonomer(s) to enhance the resulting hydrogel water absorbing capability; (3) polymerizable multi-functional crosslinking agent(s); (4) an irradiation initiator and/or thermal initiator; (5) optionally other additives to impart the resulting hydrogel specific properties such as ultra-violet blocking ability and handling colors; in the presence of a soluble, hydrophilic IPN agent such as polyvinylpyrrolidone (PVP) or poly-2-ethyl-2-oxazoline (PEOX) with a specific molecular weight range. The novel hydrophilic hydrogel material in the present invention can be used to produce a spherical contact lens, a toric contact lens, a multifocal contact lens, a toric-multifocal contact lens, and other medical devices. The inventive hydrogel material shows a low degree of surface friction, a low dehydration rate, and a high degree of biodeposit resistance.
一种互穿聚合物网络(I
PN)组合物和一种使用本发明材料制造
水凝胶隐形眼镜的工艺。该聚合物材料由以下物质聚合而成:(1) 以不饱和烷基(甲基)
丙烯酸酯或其衍
生物(如
甲基丙烯酸 2-羟乙基酯)为主要单体;(2) 可选择的含
乙烯基的共聚单体,以增强
水凝胶的吸
水能力;(3) 可聚合的多功能
交联剂;(4) 辐照
引发剂和/或热
引发剂;(5) 可选的其他添加剂,以赋予所制得的
水凝胶特定的性能,如紫外线阻隔能力和处理颜色;在有可溶性亲
水 I
PN 剂(如聚
乙烯吡咯烷酮(PVP)或具有特定分子量范围的聚
2-乙基-2-噁唑啉(P
EOX))存在的情况下。本发明中的新型亲
水性
水凝胶材料可用于生产球面隐形眼镜、散光隐形眼镜、多焦点隐形眼镜、散光多焦点隐形眼镜和其他医疗器械。本发明的
水凝胶材料表面摩擦力小、脱
水率低、抗
生物沉积能力强。