Patent ID: 8476190
Filing Date: 2013-07-02
Classification: B41M,C08F,C08L,Y10T

Abstract:
1. A composite particle comprising: a first polymeric particle having a diameter of from 100 nm to 3.5 microns comprising a core and a shell: said core comprising, when dry, at least one void, and said shell polymer having a calculated glass transition temperature(“Tg”) greater than 50° C., and a second polymeric particle disposed on the surface of said first polymeric particle, said second polymeric particle having been prepared by emulsion polymerization and having a minimum film-forming temperature of greater than 20° C.; wherein the ratio of the diameter of said first polymeric particle to the diameter of said second polymeric particle is from 1 to 50; and wherein the ratio of the weight of said first polymeric particle to the weight of said second polymeric particle is from 0.1 to 40.