Optical polymeric composition and method of making same

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 69/00 (2006.01) C08J 7/06 (2006.01) C08K 3/22 (2006.01) C08K 5/10 (2006.01) C08K 5/13 (2006.01) C08K 5/5415 (2006.01) C08K 13/02 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2721374

The invention relates to a a polymer composition, comprising: (i) at least one thermoplastic resin having a glass transition temperature of at least about 220°C; (ii) at least one phenylalkoxysilane, biphenol, trisilanolphenyl polyhedral oligomeric silesquioxane, or mixture of two or more thereof; (iii) inorganic particulates having an average particle size in the range up to about 100 nanometers dispersed in the thermoplastic resin, the inorganic particulates having an index of refraction in the range from about 1.4 to about 3; and (iv) an effective amount of at least one dispersant to disperse the inorganic particulates in the thermoplastic resin; with the proviso that when the trisilanolphenyl polyhedral oligomeric silesquioxane is in the form of particulates with an average particle size up to about 100 nanometers, the trisilanolphenyl polyhedral oligomeric silesquioxane particulates are optionally used as both component (ii) and as a partial or complete replacement for the inorganic particulates in component (iii). The polymer composition may be a high temperature thermoplastic suitable for forming, such as by molding, optical articles such as lenses.

Linvention concerne une composition polymère, comprenant : (i) au moins une résine thermoplastique ayant une température de transition vitreuse dau moins environ 220°C; (ii) au moins un phénylalkoxysilane, un biphénol, un silesquioxane trisilanolphényl polyèdre oligomère ou un mélange de deux ou plus de ces éléments; (iii) des particules inorganiques qui ont une taille de particule moyenne dans la plage pouvant aller jusquà environ 100 nanomètres et sont dispersées dans la résine thermoplastique, les particules inorganiques ayant un indice de réfraction compris dans la plage denviron 1,4 à environ 3; et (iv) une quantité effective dau moins un dispersant pour disperser les particules inorganiques dans la résine thermoplastique; à la condition que lorsque le silesquioxane trisilanolphényl polyèdre oligomère se présente sous forme de particules ayant une taille de particule moyenne pouvant atteindre environ 100 nanomètres, les particules de silesquioxane trisilanolphényl polyèdre oligomère soient éventuellement utilisées à la fois comme composant (ii) et en remplacement partiel ou complet des particules inorganiques du composant (iii). La composition polymère peut être un thermoplastique haute température adapté pour former, notamment par moulage, des articles optiques tels que des lentilles.

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