Patent ID: 8080595

Claim:
A process for the preparation of self-binding pigmentary particles, dry or in aqueous suspension or dispersion, comprising the following stages: a) forming or obtaining one or more aqueous suspensions of at least one pigmentary matter; b) forming or obtaining one or more aqueous solutions or suspensions or emulsions of at least one binder, and/or forming or obtaining one or more dry binder or binders; c) co-grinding the aqueous suspension or suspensions formed or obtained in stage a) with the aqueous solutions or suspensions or emulsions and/or the dry binder or binders formed or obtained in stage b) so as to obtain an aqueous suspension of self-binding pigmentary particles; d) possibly co-grinding the aqueous suspension obtained in stage c) with one or more aqueous solutions or suspensions or emulsions of at least one binder; e) possibly increasing the concentration of the aqueous suspension obtained in stage c) or d) by thermal and/or mechanical concentration; f) possibly dispersing the aqueous suspension obtained in stage e) through the use of at least one dispersing agent; g) possibly drying the aqueous suspension obtained in stage c) or in stage d) or in stage e) or in stage f); wherein a reverse emulsion formed from a dispersion in an oily phase of water particles and at least one polymer of acrylamide with an acrylic monomer is introduced into the process: before and/or during stage c), following stage c) and any possible stage d), following the accomplishment of stage e), following the accomplishment of stage f), or before any possible stage g).