申请人:——
公开号:US20030173551A1
公开(公告)日:2003-09-18
A polymerizable composition is described, which composition comprises a major amount of a polyol(allyl carbonate) monomer, e.g., diethylene glycol bis(allyl carbonate) monomer, and a minor amount of a radically polymerizable second monomer represented by the general formula,
1
wherein R
2
is a polyvalent linking group that is free of urethane linkages, e.g., R
2
may be a residue of a polyisocyanate, such as isophorone diisocyanate; R
3
is a residue of a material having a single hydroxy group and at least one allyl group, R
3
being free of urethane linkages, e.g., R
3
may be a residue of a poly(alkylene glycol) allyl ether, such as poly(1,2-propylene glycol) allyl ether; and j is a number from 2 to 4. The second monomer may also be present in the composition in an amount at least sufficient such that a polymerizate, e.g., a plus ophthalmic lens, obtained from the composition is substantially free of tinting defects, e.g., ferns and/or moons.
描述了一种可聚合的组合物,该组合物包括主要量的多元醇(碳酸烯丙酯)单体,如二甘醇双(碳酸烯丙酯)单体,和少量的由通式表示的可辐射聚合的第二单体、
1
其中 R
2
是不含氨基甲酸酯连接的多价连接基团,如 R
2
可以是多异氰酸酯(如异佛尔酮二异氰酸酯)的残留物;R
3
是具有一个羟基和至少一个烯丙基的材料的残基,R
3
不含氨基甲酸乙酯连接,例如 R
3
第二单体还可以以至少足够的量存在于组合物中,从而使从组合物中获得的聚合物(例如,外加眼科镜片)基本上不存在着色缺陷,例如,蕨类和/或月亮。