METHOD OF CONTROLLED CHEMICAL INTERACTIONS surface of solid fillers and additives to produce a product FILLER SURFACED

摘要

1. A process for preparing a filler product surfaced with succinic (bubbled) anhydride (s), wherein the method comprises at least the steps of: a) providing at least one filler comprising calcium carbonate, imeyuschegoi) a weight average particle size d in the range from 0.1 .mu.m to 7 .mu.m, ii) an upper limit value (d) ≤15 microns, iii) a specific surface area (BET) of from 0.5 to 150 m / g as determined by the nitrogen BET method, and iv) residual total moisture content from 0.01 to 1 wt.%, based on the total dry weight of at least one material a filler comprising calcium carbonate, b) obtaining at least one mono-substituted succinic anhydride, and, optionally, at least one mono-substituted succinic acid in an amount of from 0.1 to 3 wt.%, based on the total dry weight of at least one filler comprising calcium carbonate material of step a), c) contacting the surface of at least one filler containing calcium carbonate of step a) with stirring, in one or more stages, at least with a mono-substituted Yantai nym anhydride and, optionally, at least one mono-substituted succinic acid with stadiib) so that the layer has been processed, comprising at least one mono-substituted succinic anhydride, and optionally at least one mono-substituted succinic acid and / or salt (s) product (s), their interaction is formed on the surface of said at least one filler containing calcium carbonate, in step a), wherein the temperature before and / or during the contacting step c) is adjusted so that evap and was at least 2 ° C above the melting temperature of