公开(公告)号：US07608207B2

公开(公告)日：2009-10-27

申请号：US10332287

申请日：2001-07-06

申请人： Nathaly Vassal ,  Jean-Pierre Vairon ,  Bernadette Charleux ,  Pascale Tardieu ,  Sylvette Maisonnier ,  Jean-Paul Cano

发明人： Nathaly Vassal ,  Jean-Pierre Vairon ,  Bernadette Charleux ,  Pascale Tardieu ,  Sylvette Maisonnier ,  Jean-Paul Cano

IPC分类号： G02B5/23 ,  G03C1/72

CPC分类号： C08K5/3437 ,  C08G18/0823 ,  C08G18/12 ,  C08G18/4277 ,  C08G18/6659 ,  C08K5/357 ,  G02B5/23 ,  C08G18/3225 ,  C08L75/04

摘要： The method of the invention comprises: a) forming a hydrophilic polyurethane prepolymer with isocyanate end groups, by the polyaddition reaction of at least one polyol and at least one diisocyanate in the presence of at least one internal emulsifying agent; b) mixing the polyurethane prepolymer with a photochromic agent; c) adding water or a mixture of water and solvent, under agitation, to the mixture of the polyurethane prepolymer and the photochromic agent, to form an emulsion; and d) adding at least one chain extension agent to the emulsion and performing a chain extension reaction to give the final photochromic polyurethane latex. Application to the production of ophthalmic articles having photochromic properties.

摘要翻译： 本发明的方法包括：a）通过至少一种多元醇和至少一种二异氰酸酯在至少一种内部乳化剂存在下的加聚反应形成具有异氰酸酯端基的亲水性聚氨酯预聚物; b）将聚氨酯预聚物与光致变色剂混合; c）在搅拌下将水或水和溶剂的混合物加入到聚氨酯预聚物和光致变色剂的混合物中以形成乳液; 和d）向乳液中加入至少一种扩链剂并进行扩链反应，得到最终的光致变色聚氨酯胶乳。 适用于具有光致变色特性的眼用物品的生产。