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    • 59. 发明授权
    • Plastic lens
    • 塑料镜片
    • US5130393A
    • 1992-07-14
    • US439369
    • 1989-11-08
    • Shigeo Nakamura
    • Shigeo Nakamura
    • G02B1/04
    • G02B1/041G02B1/043
    • The plastic lens of the present invention consists of a copolymer obtained by copolymerizing a monomer mixture consisting of given proportions of diethylene glycol bis(allyl carbonate), benzyl methacrylate, diallyl phthalate (these three monomers has been used as a monomer mixture for conventional plastic lenses) and, as an additional monomer, an alkyl methacrylate. This copolymer has excellent adhesion to upper and lower molds and, when immersed in, for example, a cleaning solution such as a methylene chloride-strong alkali mixed cleaning solution or the like, causes no separation from the molds; accordingly in the copolymer, there can be prevented the occurrence of surface roughening, cloudiness and striae which have been problems in conventional plastic lenses.
    • PCT No.PCT / JP89 / 00345 Sec。 371日期:一九八九年十一月八日 102(e)日期1989年11月8日PCT 1989年3月31日PCT公布。 出版物WO89 / 09418 本发明的塑料透镜由共聚合获得的共聚物,该共聚物由给定比例的二甘醇双(碳酸烯丙酯),甲基丙烯酸苄酯,邻苯二甲酸二烯丙酯(这三种单体已被用作 用于常规塑料透镜的单体混合物)和作为另外的单体的甲基丙烯酸烷基酯。 该共聚物对上下模具的粘附性优异,例如浸渍在例如二氯甲烷 - 强碱性混合清洗液等清洗液中时,不会与模具分离, 因此,在共聚物中,可以防止在常规塑料透镜中存在问题的表面粗糙化,浑浊和条纹的发生。