Patent ID: 6240230
Filing Date: 2001-05-29
Classification: C03C,Y10T

Abstract:
An optical fiber apparatus fiber transmitting light signals comprising:at least one optical fiber transmission path; andat least one protective coating for said transmission path, wherein said coating is obtained by radiation curing a radiation-curable composition comprising the following pre-mixture ingredients:(a) about 20 wt. % to about 80 wt. %, relative to the total weight of said composition, of at least one urethane (meth)acrylate oligomer having a backbone comprising at least one polyether repeat unit; and(b) about 20 wt. % to about 80 wt. %, relative to the total weight of said composition, of at least one monomer diluent;wherein said oligomer and/or said diluent comprise at least one isocyanurate group, and said coating exhibits a non-yellowing, delta E value of less than about 12 after four weeks of aging at 125.degree. C. and exhibits a glass transition temperature greater than about 50.degree. C.;and wherein said coating composition comprises no ingredients which form extended conjugation within said four weeks of aging at 125.degree. C.