Patent ID: 8748523

Claim:
A product prepared from the process comprising the following stages: a) pre-grinding calcium carbonate under dry and/or wet conditions to obtain an average diameter of 0.5 to 500 μm (d 50 ), with or without a dispersing agent, b) forming an aqueous suspension of the product derived from stage a) having a dry calcium carbonate content of between 10% and 80%, c) grinding the suspension derived from stage b) in the presence of a homopolymer and/or of a copolymer of (meth)acrylic acid having (i) an average molecular weight of between 8,000 g/mole and 15,000 g/mole, and (ii) less than 20% by mole of polymeric chains having a molecular weight less than 3,000 g/mole, d) optionally concentrating the aqueous suspension obtained in stage c), e) optionally adding a dispersing agent to the aqueous suspension during or after stage d), f) optionally drying the product obtained in stage c) or d) or e).