Patent ID: 6828031
Filing Date: 2004-12-07
Classification: C08G,C08L,G02B,Y10T

Abstract:
A method for fixing an optical component arranged inside a housing, comprising the steps of:arranging said optical component inside said housing; embedding said optical component in a polymer composition based on polysiloxanes; and crosslinking said polymer composition, to obtain a crosslinked silicone elastomer capable of fixing the said component; wherein said composition is a mixture comprising at least one polysiloxane containing at least two hydrogen-siloxane functional groups of formula >SiHâ€”Oâ€”, at least one polysiloxane containing at least two vinyl groups of formula â€”CH&boxH;CH2, and a catalyst, said polysiloxanes being reacted in an amount such that the molar ratio between the hydrogen-siloxane groups and the vinyl groups is less than or equal to 1:1; and said silicone elastomer evolves a quantity of hydrogen less than about 1 cm3/kg of elastomer, when submitted to thermal ageing for 15 days at 100Â° C.