| 摘要 |
<p>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.</p> |
