Patent ID: 9688574
Date: 2017-06-27
CPC Classifications: C03C,C08F,C09D,G02B

Claim:
1. A process for correcting defects in a primary coating on a glass optical fiber comprising: (a) providing an optical fiber configured for propagation of an optical signal; (b) coating the optical fiber with a composition comprising a thermoplastic polyurethane and at least one acrylate monomer; (c) curing the composition to form a primary coating covering an outer surface of the optical fiber, the primary coating comprising a thermoplastic product of the polyurethane and the at least one acrylate monomer; (d) coating the optical fiber with at least one secondary coating layer disposed over the primary coating; (e) heating the coated fiber to a temperature above the melting temperature of the thermoplastic product to cause the primary coating to flow and correct defects; and (f) cooling the coated fiber to a temperature below the melting temperature of the thermoplastic product to provide a substantially defect free primary coating.