Patent ID: 11932571
Assignee: COVESTRO (NETHERLANDS) B.V.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 6:
7. A coated optical fiber comprising a fiber portion and coating portion;
the fiber portion further comprising a glass core and a cladding layer in contact with and surrounding said glass core; and
the coating portion further including a primary coating layer in contact with and surrounding said cladding layer;
and a secondary coating layer in contact with and surrounding said primary coating layer;
wherein the primary coating layer is the product of a composition comprising:
a reactive oligomer component comprising at least one reactive urethane oligomer comprising a polymerizable group;
wherein at least 20% of a molar fraction of the polymerizable groups in the reactive oligomer component consist of methacrylate groups;
a reactive diluent monomer component comprising monofunctional reactive diluent monomers having at least one polymerizable group that is able to (co)polymerize with the polymerizable group(s) of the reactive oligomer component; wherein the reactive diluent monomer component comprises a monofunctional acrylate monomer;
wherein at least 50% of a molar fraction of the polymerizable groups of the reactive diluent monomer component consist of acrylate groups, acrylamide groups, N-vinyl amide groups, or mixtures thereof;
a photoinitiator component; and
optionally, an additive component.