Radiation-curable coating compositions, coated optical fiber, radiation-curable matrix forming material and ribbon assembly
AssigneeDSM Desotech, Inc.
InventorChander P. Chawla
Life of this patent
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Abstract
A radiation-curable, optical fiber coating composition has enhanced color stabilization and is formulated from a composition containing at least one radiation-curable oligomer or monomer. A concentration of urethane and ether linkages in the radiation-curable composition is such that a cured optical fiber coating formed from said radiation-curable composition exhibits a ΔE of about 40 or less after being exposed for 96 hours to 150° C. and then for 144 hours to 180° C. Also provided is a radiation-curable optical fiber coating composition which is substantially urethane-free.
Claims41
A radiation-curable, optical fiber coating composition comprising:
- (a) at least one radiation-curable oligomer containing an acrylic backbone and at least one radiation-curable functional group having ethylenic unsaturation;
- (b) about 1 wt. % to about 80 wt. %, relative to the total weight of the composition, of a reactive diluent;
- wherein said oligomer contains 0-5% by weight urethane linkages, relative to the total weight of the composition;
- and
- wherein said composition, after cure, has
- (1) a secant modulus of greater than 50 MPa;
- and
- (2) a ΔE value of 3 or less when exposed for 96 hours to 150° C.
A coated optical fiber comprising:
- (a) an optical fiber;
- and
- (b) at least one coating on said optical fiber formed from a radiation-curable composition comprising:
- (i) at least one radiation-curable oligomer containing an acrylic backbone and at least one radiation-curable group having ethylenic unsaturation;
- (ii) about 1 wt. % to about 80 wt. %, relative to the total weight of the composition, of reactive diluent;
- wherein said oligomer contains less than 5% by weight urethane linkages, relative to the total weight of the composition;
- and
- wherein said composition, after cure, has
- (1) a secant modulus of greater than 50 MPa;
- and
- (2) a ΔE value of 3 or less when exposed for 96 hours to 150° C.
A radiation-curable composition for coating fiber optic materials comprising the following combination of pre-mixture ingredients:
- (A) between about 10 wt. % and about 90 wt. % of a radiation-curable oligomer comprising an acrylic backbone and at least one radiation-curable group, wherein said oligomer is substantially urethane-free;
- (B) between about 1 wt. % to about 80 wt. % of one or more reactive diluents, relative to the total weight of the composition;
- wherein said composition, after cure, has
- (1) a secant modulus of greater than 50 MPa;
- and
- (2) a ΔE value of 3 or less when exposed for 96 hours to 150° C.
Dependencies are inferred from the claim text.