LAI, YU-CHIN,LANG, WEIHONG,QUINN, EDMOND T.,RUSCIO, DOMINIC V.
申请号:
ES10176459
公开号:
ES2452880T3
申请日:
2005.12.08
申请国别(地区):
ES
年份:
2014
代理人:
摘要:
A hydrogel copolymer that the hydrated polymerization product of a monomer mixture consisting of a polysiloxane prepolymer comprising soft segments that are a dirradical residue 5 of the formula (PS '): ** Formula ** where: each A is a radical hydroxyl or amino; each R is independently selected from an alkylene group of 1 to 10 carbon atoms, where the carbon atoms may include ether, urethane or ureido linkages between them; each R 'is independently selected from hydrogen, monovalent hydrocarbon radicals or monovalent hydrocarbon radicals substituted by halogen, where the hydrocarbon radicals have 1 to 20 carbon atoms that can include ether bonds to each other, is already at least 1, where the content in silicon atoms of the prepolymer is at least 32% by weight of the prepolymer; a monomer containing monofunctional silicone; and a hydrophilic comonomer selected from the group consisting of: methacrylic acid, acrylic acid, 2-hydroxyethyl methacrylate, N-vinyl pyrrolidone and methacrylamide, the hydrogel copolymer having an aqueous content of 40 to 50 percent by weight and oxygen permeability greater than 100 barrers.Un copolímero de hidrogel que el producto de polimerización hidratado de una mezcla monomérica consistente en un prepolímero de polisiloxano que comprende segmentos blandos que son un residuo dirradical 5 de la fórmula (PS'):**Fórmula** donde: cada A es un radical hidroxilo o amino; cada R es independientemente seleccionado entre un grupo alquileno de 1 a 10 átomos de carbono, donde los átomos de carbono pueden incluir uniones éter, uretano o ureido entre ellos; cada R' es independientemente seleccionado entre hidrógeno, radicales hidrocarbonados monovalentes o radicales hidrocarbonados monovalentes substituidos por halógeno, donde los radicales hidrocarbonados tienen de 1 a 20 átomos de carbono que pueden incluir uniones éter entre sí, y a es al menos 1, donde el contenido en átomos de silicio del prepolímero es de al menos un 32% en peso del prepolímero;