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Core-shell particles and preparation and use thereof

  • US 6,337,131 B1
  • Filed: 04/26/1999
  • Issued: 01/08/2002
  • Est. Priority Date: 05/04/1998
  • Status: Expired due to Term
First Claim
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1. Core-shell particles, whose core and shell materials are capable of forming a two-phase system, the shell material being filmable, the core being essentially form-stable under shell-filming conditions and being swellable by the shell material by not more than 10% of its original value when embedded in the shell material, if at all the cores having a monodisperse size distribution, and there being a difference between the refractive indices of the core material and of the shell material, and wherein the weight ratio of core:

  • shell in the particles is within the range from 1⅓

    ;

    1 to 20;

    1.

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