Patent ID: 7501107

Claim:
A process for preparing precipitated calcium carbonate particles structured at the nanoscale, comprising, in a single stage: carbonating milk of lime in the presence of dioctyl sodium sulphosuccinate in a concentration of greater than 1% and not exceeding 20% to obtain calcium carbonate particles comprising at least one of nanofibres, nanofibres of nanorosary type, nanoplates, nanoplates combined as accordions, and nanofibres combined as faggots; or carbonating milk of lime in the presence of polyaspartic acid and/or a salt thereof in a concentration of greater than 1% and not exceeding 20% to obtain calcium carbonate particles comprising at least one of nanofibres, nanofibres of nanorosary type, nanoplates, nanoplates combined as accordions, and nanofibres combined as faggots.