Silicone lens and silicone resin composition for molding lens

Details Silicone lens and silicone resin composition for molding lens Silicone lens and silicone resin composition for molding lens

2007-04-20

2010-06-15

Zimmer, Marc S (Department: 1796)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C525S477000, C525S478000, C525S479000, C528S015000, C528S031000, C528S032000

Reexamination Certificate

active

07737194

ABSTRACT:
A colorless transparent silicone lens produced by thermally curing a silicone resin composition comprising(A) an organopolysiloxane having a resin structure comprising R1SiO1.5unit, R22SiO unit, and R3aR4bSiO(4-a-b)/2unit wherein R1, R2, and R3are independently methyl group, ethyl group, propyl group, cyclohexyl group, or phenyl group, R4is vinyl group or allyl group, a is 0, 1, or 2, b is 1 or 2, and a+b is 2 or 3, and wherein number of repetition of the R22SiO unit is 5 to 300,(B) an organohydrogen polysiloxane having a resin structure comprising R1SiO1.5unit, R22SiO unit, and R3cHdSiO(4-c-d)/2unit wherein c is 0, 1, or 2, d is 1 or 2, and c+d is 2 or 3, and wherein number of repetition of the R22SiO unit is 5 to 300, the component, and(C) a platinum group catalyst.A silicone lens having excellent flexibility, transparency, and moldability as well as reduced surface tackiness is provided.

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