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US 2002/0117085 A1Published application
Particulate mineral materials
AssigneeImerys Minerals Limited
InventorRobin Wesley
Life of this patent
Estimating the term…
Abstract
A particulate hydrous mineral suitable for use as an opacifying pigment, filler or extender has a shape factor which is greater than S, where S is defined by Equation 1 as follows: S=(d50/0.036)+20 Equation 1; where d50 is the mean particle size of the particles of the mineral measured in microns. The particulate mineral is preferably a kaolin, which is particularly suitable for use in aqueous matt paint compositions.
Claims15
A particulate hydrous mineral suitable for use as an opacifying pigment, filler or extender which has a shape factor which is greater than S, where S is defined by Equation 1 as follows:
- S=(d50/0.036)+20 Equation 1;
- where d50 is the mean particle size of the particles of the mineral measured in microns.
Dependencies are inferred from the claim text.