Patent ID: 7524890

Claim:
A photocurable and antistatic resin composition for coating an optical fiber, comprising (A) a photopolymerizable urethane oligomer, (B) a reactive monomer having at least one (meth)acrylate or vinyl group, (C) a photoinitiator, and (D) an antistatic agent compatible with the oligomer and the monomer, wherein the photopolymerizable urethane acrylate oligomer (A) is derived from an urethane reaction of a mixture comprising (i) a polyol copolymer mixed with a sorbitan fatty acid ester or polyoxyethylene sorbitan fatty acid ester, (ii) a polyisocyanate, (iii) a hydroxyl(meth)acrylate, (iv) an urethane reaction catalyst and (v) a polymerization initiator.