Treated mineral filler product, and its uses

摘要

The present invention relates to the domain of treated mineral fillers. An appropriate preparation comprises the following steps:
(a) treating at least one dry mineral filler with at least one Group II or Group III salt of a C8 to C24 aliphatic monocarboxylic acid to produce an intermediate mineral filler product; followed by
(b) treating the intermediate mineral filler product of step (a) with at least one C8 to C24 aliphatic monocarboxylic acid to produce a treated mineral filler product. The product is characterized in that it has a total volatiles of less than 0.25% by mass, and in that it includes fatty acids in addition to fatty acid salts. Applications in particular to prepare treated mineral filler products (such as Ca carbonate) to be used in plastic applications such as in polypropylene (PP) - or polyethylene (PE) - based breathable or extrusion coating film applications.