Method of fixing a fibre-optic component in an optical...

C - Chemistry – Metallurgy – 08 – L

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C08L 83/07 (2006.01) C08L 83/04 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2385740

An optical device is described comprising at least one fibre-optic component arranged inside the said device and a particular polymer composition capable of holding the said optical components in a predetermined position and protecting them inside the said device. The polymer composition is a silicone elastomer obtained by crosslinking a mixture comprising at least one polysiloxane containing two or more hydrogen-siloxane functional groups of formula >SiH-O- at least one polysiloxane containing at least two vinyl groups of formula -CH=CH2, where the said polysiloxanes are 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. The said polymer composition has extremely low emission of hydrogen, less than 1 cm3 per kg of composition.

La présente invention concerne un dispositif optique, comprenant au moins un composant à fibres optiques, placé à l'intérieur dudit dispositif, ainsi qu'une composition polymère particulière, pouvant maintenir lesdits composants optiques dans une position prédéfinie et assurer leur protection au sein dudit dispositif. Cette composition polymère consiste en un élastomère de silicone, obtenu par réticulation d'un mélange comprenant au moins un polysiloxane qui contient deux ou plusieurs groupes fonctionnels hydrogène-siloxane de formule >SiH-O-, au moins un polysiloxane qui contient au moins deux groupes vinyle de formule -CH=CH¿2?, lesdits polysiloxanes étant mis en réaction dans une quantité telle que le rapport molaire entre les groupes hydrogène-siloxane et les groupes vinyle est inférieur ou égal à 1:1. Ladite composition polymère présente une émission d'hydrogène extrêmement faible, inférieure à 1 cm?3¿ par kg de composition.

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