Core/shell particles

Details Core/shell particles Core/shell particles

C - Chemistry, Metallurgy

08

F

C08F 285/00 (2006.01) C08F 292/00 (2006.01) C08K 9/00 (2006.01)

Patent

CA 2587477

The invention relates to core-shell particles, the core of which is essentially solid with an essentially monodisperse size distribution, with a difference between the refractive index of the core material and the shell material. The core is made from a material which either does not flow or does so at a temperature above the flow temperature of the shell material and the shell is connected to the core by means of an intermediate layer, characterised in that the shell is made from a copolymer with at least one C4- C8 alkylacrylate and at least one C4-C8 alkyl- or -alkylarylmethacrylate as monomer component.

L'invention concerne des particules de type noyau-enveloppe dont le noyau est sensiblement solide et présente une répartition granulométrique sensiblement monodispersée. L'indice de la réfraction du matériau du noyau est différent de celui du matériau de l'enveloppe et le noyau est constitué d'un matériau qui n'est pas fluide ou qui est fluide à une température supérieure à la température de fluidité du matériau de l'enveloppe, l'enveloppe étant reliée au noyau par une couche intermédiaire. L'invention est caractérisée en ce que l'enveloppe est constituée d'un copolymère qui contient au moins un acrylate d'alkyle C4-C8 et au moins un méthacrylate d'alkyle C4-C8 ou un méthacrylate d'alkylaryle C4-C8.

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