Use of glycerol as an agent to improve the self-dispersing properties of a mineral material to be added to an aqueous composition

摘要

The present disclosure describes methods for improving the auto-dispersant characteristic in water of mineral substances, such methods involving dry-grinding of a mineral substance in the presence of a formulation. In some embodiments the formulation includes glycerol and at least one agent in aqueous or pure form. In other embodiments the formulation includes an aqueous polyglycerol.

主权项

1. A method for improving the auto-dispersant characteristic in water of a mineral substance, the method comprising dry-grinding, in the presence of a formulation, a mineral substance selected from the group consisting of a dolomite, talc, titanium dioxide, alumina, kaolin and calcium carbonate,
wherein: said formulation comprises glycerol and at least one agent in aqueous or pure form; and said agent is selected from the group consisting of
glucose,fructose,sucrose,starch,cellulose having a root mean square of radius of gyration of less than or equal to a modal radius of the mineral substance,an organic polyacid of formula COOH—(CH2)n—COOH, where n is an integer between 0 and 7 inclusive,a mono or dialkaline salt of an organic polyacid of formula COOH—(CH2)n—COOH, where n is an integer between 0 and 7 inclusive,a polymeric organic polyacid comprising, in polymerized form, at least one monomer selected from the group consisting of, in the acidic or partially or completely neutralized form, acrylic acid, methacrylic acid, maleic itaconic, an oxalic acid, a pimelic acid, and an adipic acid, and at least one cation of Group I or II of the Periodic Table of the Elements,an alkanolamine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-amino-2-ethyl-1,3-propanediol, triethanolamine, N-butyldiethanolamine and triisopropanolamine, neutralized or not, anda polyethylene glycol, a polypropylene glycol or an ethylene-propylene glycol copolymer, random or block.