Polysiloxanes, methods of making same and high refractive...

Details Polysiloxanes, methods of making same and high refractive... Polysiloxanes, methods of making same and high refractive...

C - Chemistry, Metallurgy

08

G

C08G 77/04 (2006.01) A61F 2/16 (2006.01) C08G 77/20 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2118044

2118044 9321258 PCTABS00027 A new class of polysiloxanes is disclosed. Such polysiloxanes have formula (I) wherein each R and R4 is independently selected from alkyl radicals, substituted alkyl radicals, aryl radicals and substituted aryl radicals, each R1 is independently selected from divalent radicals; each R2 is independently selected from aryl radicals and substituted aryl radicals; each R3 is independently selected from monovalent hydrocarbon radicals having a multiple bond and monovalent substituted hydrocarbon radicals having a multiple bond; n is integer in the range of about 6 to about 500; and m is an integer in the range of 0 to about 500. Methods for making such polysiloxanes are also disclosed. In addition, high refractive index, that is having a refractive index of at least about 1.46, silicone compositions useful in the fabrication of lens bodies are disclosed.

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