Patent ID: 8357446
Filing Date: 2013-01-22
Classification: B24B,Y10T

Abstract:
1. A plurality of polymeric particles embedded with silicate comprising: gas-filled polymeric microelements, the gas-filled polymeric microelements having a shell and a density of 5 g/liter to 200 g/liter, the shell having an outer surface and a diameter of 5 μm to 200 μm and the outer surface of the shell of the gas-filled polymeric particles having silicate particles embedded in the polymer, the silicate particles having an average particle size of 0.01 to 3 μm; the silicate-containing particles distributed within each of the polymeric microelements, the silicate-containing regions being spaced to coat less than 50 percent of the outer surface of the polymeric microelements; and less than 0.1 weight percent total of the polymeric microelements being associated with i) silicate particles having a particle size of greater than 5 μm; ii) silicate-containing regions covering greater than 50 percent of the outer surface of the polymeric microelements; and iii) polymeric microelements agglomerated with silicate particles to an average cluster size of greater than 120 μm.