Patent ID: 6204304
Filing Date: 2001-03-20
Classification: C03C,C08F,C08G,C08L,C09D,G02B,Y10S,Y10T

Abstract:
A ultraviolet (UV) transparent coating composition that is UV curable comprising:a. 10-70 wt % of the coating composition of at least one vinyl ether functional monomer,b. 30-50 wt % of the coating composition of an oligomer of polytetrahydrofuran diol that has been chain-extended with a difunctional aliphatic or cycloaliphatic epoxide to have a number average molecular weight greater than about 6000, andc. an effective level of a cationic photoinitiator,said coating composition having a viscosity in the range 700-20,000 cps at 25.degree. C., and a cured optical absorbance at wavelengths of 240-400 nm of less than 0.016/.mu.m.