Optical fibers and core - forming compositions

Details Optical fibers and core - forming compositions Optical fibers and core - forming compositions

1991-12-09

1994-05-24

Dean, Ralph H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 21, 528 24, 528 25, 528 26, 528 31, 385123, C08G 7704

Patent

active

053149793

ABSTRACT:
A composition comprising (A) an organopolysiloxane having a unit of the formula: R.sup.1 SiO.sub.3/2 wherein R.sup.1 is methyl, phenyl or vinyl 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, (C) a platinum catalyst, and (D) an organosilane or organopolysiloxane of the formula: R.sup.2.sub.a (R.sup.3 O).sub.b SiO.sub.(4-a-b)/2 wherein R.sup.2 and R.sup.3 are hydrogen, methyl, phenyl or vinyl maintains good light transmission in cured form when exposed to humidity and is thus suitable for forming cores of optical fibers. Similar benefits are obtained with a composition comprising components (A) and (B), (C') a platinum catalyst and/or a radical polymerization initiator, and (E) a carboxylate.

REFERENCES:
patent: 4477641 (1984-10-01), Matsumoto et al.
patent: 4562096 (1985-12-01), Lo et al.
patent: 4783140 (1988-11-01), Osawa et al.
patent: 4826284 (1989-05-01), Sakagami et al.

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