OPTICAL FIBRE HAVING CROSSLINKED SECONDARY COATING
An optical fibre comprises: an optical waveguide comprising a glass core surrounded by a glass cladding; a primary coating surrounding the optical waveguide; a secondary coating, surrounding the primary coating, comprising a cured polymer material obtained by curing a curable coating composition com...
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Main Authors | , , , |
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Format | Patent |
Language | Chinese English |
Published |
27.03.2020
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Subjects | |
Online Access | Get full text |
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Summary: | An optical fibre comprises: an optical waveguide comprising a glass core surrounded by a glass cladding; a primary coating surrounding the optical waveguide; a secondary coating, surrounding the primary coating, comprising a cured polymer material obtained by curing a curable coating composition comprising: (a) a polyester obtained by esterification of a reactant A selected from carboxylic acids,triglycerides, and mixtures thereof, having a C16-C24 aliphatic chain comprising at least two double bonds spaced by one carbon atom at most, with a reactant B selected from polyols having at least 3hydroxyl groups, the polyols being thermally stable up to 300 DEG C; (b) an aromatic glycidyl epoxy resin; (c) an aliphatic polyether hardener containing from 8 to 64 hydroxy groups and/or from 2 to 4epoxy groups; and (d) a secondary amine compound as curing agent. Preferably, the step of curing is a thermal curing, preferably up to 300 DEG C. When cured by heat, the coating material can be applied during the drawing proce |
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Bibliography: | Application Number: CN201910883969 |