Patent ID: 8044141
Filing Date: 2011-10-25
Classification: C08F,C08L,C09D

Abstract:
1. A coating composition that is suitable for forming an abrasion resistant tintable coating layer on an optical substrate, the coating composition including: a polymerisable monomer having a polyoxyalkylene backbone containing at least four contiguous oxyalkylene units, and an abrasion resistant agent and a high crosslinking polymerisable monomer, wherein the coating composition is polymerisable to form an abrasion resistant coating layer on the optical substrate into which a tinting compound can be introduced, and wherein the relative amounts of the abrasion resistant agent (y) as a percentage w/w of solids and the high cross linking monomer (x) as a percentage w/w of monomers is between y=−0.76x+68 and y=−0.60x+30.