| 摘要 |
A new class of polysiloxanes is disclosed. Such polysiloxanes have the formula <IMAGE> 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 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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