Polysiloxanes, methods of making same and high refractive index

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

1994-04-11

1995-05-30

Bleutge, John C.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 15, 528 25, 528 31, 528 37, 528 43, 351159, 351160R, 523107, C08F28312, G02C 702, G02C 704

Patent

active

054202132

ABSTRACT:
A new class of polysiloxanes is disclosed. Such polysiloxanes have the formula ##STR1## wherein each R and R.sup.4 is independently selected from alkyl radicals, substituted alkyl radicals, aryl radicals and substituted aryl radicals; each R.sup.1 is independently selected from divalent radicals; each R.sup.2 is independently selected from aryl radicals and substituted aryl radicals; each R.sup.3 is independently selected from monovalent hydrocarbon radicals having a multiple bond and monovalent substituted hydrocarbon radicals having a multiple bond; n is an 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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