Patent ID: 8975322
Filing Date: 2015-03-10
Classification: C08K,Y10T

Abstract:
1. A calcium carbonate filler for a resin, in which a content rate of particles having a particle diameter of 0.26 μm or less is 30% or less in a number particle size distribution diameter measured (Mac-VIEW manufactured by Mountech) from an electron micrograph, and which satisfies the following expressions (a) to (c): wherein: Dmv5: A 5% diameter (μm) of a particle body which is a secondary aggregated body or a tertiary aggregated body formed by aggregation of primary particles in a volume particle size distribution by a laser diffraction particle size distribution measuring device (MASTERSIZER2000 manufactured by Malvern), Dmv5: A 5% diameter (μm) of a particle body which is a secondary aggregated body or a tertiary aggregated body formed by aggregation of primary particles in a number particle size distribution diameter (Mac-VIEW manufactured by Mountech) measured with an electron microscope, Sw: A BET specific surface area (Macsorb manufactured by Mountech) (m Mo: A water amount (ppm) by the Karl Fischer method at 200 to 300° C.