Patent ID: 9297950
Filing Date: 2016-03-29
CPC Classification: C03C,G02B

Claim Text:
1. An optical fiber having, on an outer periphery of a glass fiber composed of a core part and a cladding part, a coating layer made by crosslinking an energy-curable resin composition containing a silicon compound, wherein the silicon compound contained in the energy-curable resin composition of the coating layer as an outermost layer is a silicon compound represented by the following general formula (1), with the content of a cyclic silicone site in the following formula (1) being from 10 to 30% by mass: wherein, each of R which is an optical fiber having, on an outer periphery of a glass fiber composed of a core part and a cladding part, a coating layer made by crosslinking an energy-curable resin composition containing a silicon compound, wherein the silicon compound contained in the energy-curable resin composition of the coating layer as an outermost layer is a silicon compound represented by the following general formula (1-1), with the content of a cyclic silicone site being from 10 to 30% by mass: wherein, R wherein the coating layer is configured of two layers of an inner coating layer and an outer coating layer; the energy-curable resin composition of the outer coating layer contains the silicon compound represented by the general formula (1-1), with the content (% by mass) of the cyclic silicone site being from 10 to 30% by mass; the energy-curable resin composition of the inner coating layer contains the silicon compound represented by the general formula (1-1), with the content (% by mass) of the cyclic silicone site being from 5 to 20% by mass; and the content of the cyclic silicone site of the silicon compound contained in the inner coating layer is smaller than the content of the cyclic silicone site of the silicon compound contained in the outer coating layer.