Optical fibers and core-forming compositions
AssigneesShin-Etsu Chemical Co., Ltd., Hitachi Cable, Ltd.
InventorsShohei Kozakai, Yoshinori Hida, Hideki Asano, Tomiya Abe
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Abstract
A composition comprising (a) an organopolysiloxane having a unit of the formula: RSiO.sub.3/2 wherein R is a substituted or unsubstituted monovalent C.sub.1-10 hydrocarbon group in its molecule and having at least 0.05 alkenyl groups each directly attached to a silicon atom per silicon atom, (b) an organohydrogenpolysiloxane having at least 2 hydrogen atoms each directly attached to a silicon atom per molecule, and (c) a platinum catalyst, maintains good light transmission in cured form when exposed to humidity or stresses and is thus suitable for forming cores of optical fibers.
Claims26
A composition for forming an optical fiber core in which light is transmitted, comprising
- (a) an organopolysiloxane having a unit of the formula:
- RSiO.sub.3/2 ( 1)
- wherein R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms in the molecule thereof and having at least 0.05 alkenyl groups each directly attached to a silicon atom per silicon atom, in a proportion of 30 to 80 mol %,
- (b) an organopolysiloxane having at least 2 hydrogen atoms each directly attached to a silicon atom per molecule, and
- (c) a platinum catalyst,
- said composition having the capability of being cured into a cured product having a hardness of at least 30 in Shore D hardness scale.
Dependencies are inferred from the claim text.