Contact lens material

摘要

The invention relates to novel multifunctional organosiloxane monomers which can be represented by the general formulas: <IMAGE> +TR <IMAGE> and <IMAGE> wherein, at least one of "X1"-"X7" is a group of the following structure: <IMAGE> and its copolymerization with monofunctional organosiloxane monomers which can be represented by the general formulas: <IMAGE> and <IMAGE> and alkyl and/or cyclic alkyl esters of acrylic, methacrylic acids and/or itaconate esters, and in some cases fluoroalkyl esters of acrylic, methacrylic acids and/or fluoroalkyl itaconate esters to produce excellent oxygen permeable hard contact lens material. Preferably, the copolymer includes cross-linking agents and wetting agents. Contact lenses manufactured from the materials can be easily machined and polished into hard contact lenses having solvent-resistance and sufficient permeabilities.