pigment particulate material, composition containing the particulate material, film, product, use of the particulate material, and, invention.

摘要

The invention provides a pigment particulate material selected from the group consisting of titanium dioxide, doped titanium dioxide and a mixture thereof, wherein the particulate material has an average crystal size in the range of 0.3 to 0.5 microns. and a crystal size distribution such that 40% by weight or more of the particulate material has a crystal size in the range of 0.3 to 0.5 microns, and wherein the ratio of average particle size to average size. of crystal is 1.25 or less. the particulate material may be used in a composition comprising pigment material dispersed in a carrier to provide improved opacity for said composition.