申请人:KELVIN LENSES LIMITED
公开号:EP0050934A1
公开(公告)日:1982-05-05
Polymeric materials suitable for bio-medical applications, particularly in making contact lenses, are derived by reaction of the following:
1) 20 to 40 mole % of a polymerisable amide which is an unsubstituted or substituted amide of a carboxylic acid containing olefinic unsaturation,
2) 25 to 55 mole % of a N-vinyl lactam,
3) 5 to 20 mole % of a polymerisable ester which is an ester of a carboxylic acid containing olefinic unsaturation,
4) 1 to 10 mole % of a polymerisable carboxylic acid containing olefinic unsaturation, and
5) 3 to 10 mole % of a hydrophobic monomer component comprising:
a) a fluorine-containing polymerisable monomer having a fluoroaliphatic side chain, or a polymerisable monomer having an esterifiable group, and
b) a non-fluorine-containing polymerisable hydrophobic vinyl monomer;
and subsequently esterifying any esterifiable groups provided by monomer (5a) using a fluorine-containing aliphatic acid or derivative thereof, the amounts of the monomers (1) to (5) totalling 100 mole %, and either the copolymerisation is carried out in the presence of a cross linking agent or the resulting copolymer is subsequently cross linked.
The polymeric material of the present invention may be machined to form contact lenses and subsequently hydrated to form a hydrogel which is suitable for use as an extended wear contact lens.
适用于生物医学应用,特别是用于制造隐形眼镜的聚合材料是通过以下反应生成的:
1) 20 至 40 摩尔%的可聚合酰胺,它是含有烯烃不饱和的羧酸的未取代或取代酰胺、
2) 25 至 55 摩尔%的 N-乙烯内酰胺、
3) 5 至 20 摩尔%的可聚合酯,它是含有烯烃不饱和度的羧酸的酯、
4) 1 至 10 摩尔%的含有烯烃不饱和度的可聚合羧酸,以及
5) 3 至 10 摩尔%的疏水单体成分,包括
a) 具有氟脂肪族侧链的含氟可聚合单体,或具有可酯化基团的可聚合单体,以及
b) 非含氟可聚合疏水性乙烯基单体;
随后使用含氟脂肪族酸或其衍生物对单体(5a)提供的任何可酯化基团进行酯化,单体(1)至(5)的用量总计为 100 摩尔%,在有交联剂存在的情况下进行共聚,或随后对所得共聚物进行交联。
本发明的聚合材料可加工成隐形眼镜,然后水合形成适合用作长期佩戴隐形眼镜的水凝胶。