Patent ID: 8980956
Filing Date: 2015-03-17
Classification: C08F,G02B

Abstract:
1. A method comprising dissolving an ethylenically unsaturated zwitterionic monomer in a co-monomer system comprising a functionalised ethylenically unsaturated monomer in which the zwitterionic monomer is soluble, a siloxane group-containing monomer, and a crosslinking agent, to produce a homogeneous polymerisable solution, wherein the siloxane group-containing monomer is a material of formula (A) or (B): wherein T Y Y R G Z is a zwitterionic group; k is an integer from 1 to 10; l is an integer from 1 to 3; u is an integer from 1 to 3; and v is an integer from 1 to 3.