Patent ID: 7780779
Filing Date: 2010-08-24
Classification: C01P,C09C

Abstract:
1. A composition comprising kaolin having a particle size distribution such that at least about 90% of the kaolin has a particle size of less than about 1 μm and a median particle size (d 50 ) ranging from 0.25 μm to less than about 0.35 μm, having an Fe 2 O 3 content in an amount less than about 0.8% by weight relative to the total solids content, and a GE brightness of at least about 91, said kaolin being derived from a crude kaolin having Fe 2 O 3 in an amount of at least about 1.0% by weight, relative to the weight of the crude kaolin, and a titania content of at least about 1.5% by weight, relative to the weight of the crude kaolin.