Optical silica-containing polysiloxane resin

Details Optical silica-containing polysiloxane resin Optical silica-containing polysiloxane resin

1998-03-18

1999-05-18

Cain, Edward J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524493, C08K3/00

Patent

active

059051086

ABSTRACT:
An optical silica-containing polysiloxane resin comprises colloidal silica and a polysiloxane resin. The polysiloxane resin has the formula RSiO.sub.3/2, where R is selected from the group consisting of hydrocarbon groups of 1 to 4 carbon atoms and fluorohydrocarbon groups of 3 to 10 carbon atoms. The fluorohydrocarbon groups have the general formula C.sub.n F.sub.(2n+1) C.sub.2 H.sub.4 --, where n is an integer of 1 to 8. The optical silica-containing polysiloxane resin has high light transmissivity and high surface hardness, and can be used for optical elements.

REFERENCES:
patent: 3986997 (1976-10-01), Clark
patent: 5371155 (1994-12-01), Kobayashi
Chapter 12-15 of "Silicone Handbook" by Kunio Itoh ( Nikkan Kogyo Shinbunsha, 1990).
Chapter 3 of "Modern Silicone Technolgy" (CMC, 1986) by Makoto Kumata and Masashi Wada.

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