Composition of Calcium Carbonate tolerant to acid, a process for its preparracion and a method to improve the optical properties delpapel neutral to slightly acidic.

摘要

Presents an improved form of Calcium Carbonate that is tolerant to acid to allow its use as a filler in the manufacture of paper, neutral to slightly acidAnd a process for producing Calcium Carbonate toleranteal acid.This u00e1cidocomprende tolerant Calcium Carbonate Calcium Carbonate with a mixture of at least 0.1 percent based on the weight of Calcium CarbonateOf SODIUM ALUMINATE together with at least approximately 0.1 per cent based on the dry weight of Calcium Carbonate, one or more weak acids.