Osidic dispersing agent
AssigneeCoatex
InventorsFrancis BONY, Morgane LE NEINDRE, Benoit MAGNY, Yves MATTER, Jean-Marc SUAU
Life of this patent
Estimating the term…
Abstract
The invention relates to the field of dispersing agents for an aqueous composition, in particular for dispersing a mineral material in the form of particles. The dispersing agent according to the invention comprises a dispersing polymer combined with an osidic derivative or a derivative of saccharide origin. The invention also relates to an aqueous composition comprising said dispersing agent and a mineral material in the form of particles, and to the use of said agent or composition.
Claims17
An aqueous dispersing agent, comprising:
- at least one polymer (P) prepared by at least one radical polymerisation reaction, at a temperature greater than 50° C., of at least one anionic monomer (M1) comprising at least one polymerisable olefinic unsaturation and at least one carboxylic acid group or a salt thereof, in the presence of at least one radical-generating compound selected from the group consisting of hydrogen peroxide, benzoyl peroxide, acetyl peroxide, lauryl peroxide, tert-butyl hydroperoxide, cumene hydroperoxide, ammonium persulphate, an alkali metal persulphate, an azo compound, a combination thereof and associations with an ion selected from the group consisting of FeII, FeIII, CuI, CuII and a combination thereof;
- and
- at least one derivative (S) selected from the group consisting of:
- an ose (S1) comprising from 3 to 8 carbon atoms;
- an ose oligomer (S2) comprising from 1 to 10 ose units;
- and
- a product (S3) resulting from degradation of a saccharide.
A method for controlling a rheology of an aqueous composition comprising at least one polymer (P) the method comprising:
- adding to the aqueous composition at least one derivative (S) selected from the group consisting of:
- an ose (S1) comprising from 3 to 8 carbon atoms;
- an ose oligomer (S2) comprising from 1 to 10 ose units;
- and
- a product (S3) resulting from the degradation of a saccharide,
- wherein the at least one polymer (P) is prepared by at least one radical polymerisation reaction, at a temperature greater than 50° C., of at least one anionic monomer (M1) comprising at least one polymerisable olefinic unsaturation and at least one carboxylic acid group or a salt thereof, in the presence of at least one radical-generating compound selected from the group consisting of hydrogen peroxide, benzoyl peroxide, acetyl peroxide, lauryl Peroxide, tert-butyl hydroperoxide, cumene hydroperoxide, ammonium persulphate, an alkali metal persulphate, an azo compound, a combination thereof and associations with an ion selected from the group consisting of FeII, FeIII, CuI, CuII and a combination thereof.
Dependencies are inferred from the claim text.