Patent ID: 6808808
Filing Date: 2004-10-26
Classification: C08K,Y10T

Abstract:
A clay mixture, comprising:a finely divided siliceous clay which has been surface treated with organosilane, and wherein the clay comprises a mixture of a first group of clay particles having a respective first median particle size and a second group of clay particles having a respective second median particle size that is at least an order of magnitude larger than the first median particle size, wherein the first and second clay particle groups have been surface treated by a system independently selected from the group consisting of epoxy-functionalized organosilane, amino-functionalized organosilane, and non-reactive organosilane; wherein the first group of particles comprises 10 to 80% by volume of the clay mixture and has a median particle size in the range of approximately 0.1 to approximately 1.0 microns, and the second group of particles comprises 90 to 20% by volume of the clay mixture and has a median particle size in the range of approximately 4.0 to approximately 40 microns.