D1363 BT RADIATION CURABLE PRIMARY COATINGS ON OPTICAL FIBER
First Claim
1. A radiation curable Primary Coating composition comprising at least one (meth)acrylate functional oligomer and a photoinitiator,wherein the urethane-(meth)acrylate oligomer comprises (meth)acrylate groups, at least one polyol backbone and urethane groups,wherein about 15% or more of the urethane groups are derived from one or both of 2,4- and 2,6-toluene diisocyanate,wherein at least 15% of the urethane groups are derived from a cyclic or branched aliphatic isocyanate, andwherein said (meth)acrylate functional oligomer has a number average molecular weight of from at least about 4000 g/mol to less than or equal to about 15,000 g/mol;
- andwherein a cured film of the radiation curable Primary Coating composition has a modulus of less than or equal to about 1.2 MPa.
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Accused Products
Abstract
Radiation curable coatings for use as a Primary Coating for optical fibers, optical fibers coated with said coatings and methods for the preparation of coated optical fibers. The radiation curable coating comprises at least one (meth)acrylate functional oligomer and a photoinitiator, wherein the urethane-(meth)acrylate oligomer CA/CR comprises (meth)acrylate groups, at least one polyol backbone and urethane groups, wherein about 15% or more of the urethane groups are derived from one or both of 2,4- and 2,6-toluene diisocyanate, wherein at least 15% of the urethane groups are derived from a cyclic or branched aliphatic isocyanate, and wherein said (meth)acrylate functional oligomer has a number average molecular weight of from at least about 4000 g/mol to less than or equal to about 15,000 g/mol; and wherein a cured film of the radiation curable Primary Coating composition has a modulus of less than or equal to about 1.2 MPa.
81 Citations
20 Claims
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1. A radiation curable Primary Coating composition comprising at least one (meth)acrylate functional oligomer and a photoinitiator,
wherein the urethane-(meth)acrylate oligomer comprises (meth)acrylate groups, at least one polyol backbone and urethane groups, wherein about 15% or more of the urethane groups are derived from one or both of 2,4- and 2,6-toluene diisocyanate, wherein at least 15% of the urethane groups are derived from a cyclic or branched aliphatic isocyanate, and wherein said (meth)acrylate functional oligomer has a number average molecular weight of from at least about 4000 g/mol to less than or equal to about 15,000 g/mol; - and
wherein a cured film of the radiation curable Primary Coating composition has a modulus of less than or equal to about 1.2 MPa. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification