POWDERED GYROLITE-TYPE CALCIUM SILICATE HAVING HIGH OIL ABSORBENCY AND LARGE PARTICLE DIAMETER, AND PRODUCTION METHOD THEREFOR

摘要

Provided is powdered gyrolite-type calcium silicate that has a relatively large particle size, yet is endowed with both a high oil absorption and a high particle strength. The powdered gyrolite-type calcium silicate has (1) an oil absorption of at least 2.8 mL/g, (2) an average particle diameter of at least 40 μm, and (3) in treatment where the gyrolite-type calcium silicate is charged into a laser diffraction-type particle size analyzer within the range of a diffraction volume of from 0.1 to 0.6 and circulated at a flow rate of 32.5 mL/s for 5 minutes, a percent change in average particle diameter following treatment with respect to average particle diameter before treatment of 15% or less.

主权项

1. Powdered gyrolite-type calcium silicate having:
(1) an oil absorption of at least 2.8 mL/g; (2) an average particle diameter of at least 40 μm; and (3) in treatment where the gyrolite-type calcium silicate is charged into a laser diffraction-type particle size analyzer so as to fall within a range of a diffraction volume of from 0.1 to 0.6 and circulated at a flow rate of 32.5 mL/s for 5 minutes, a percent change in an average particle diameter following the treatment with respect to an average particle diameter before the treatment of 15% or less.