Trithiocarbonate derivatives and the use thereof in the form of transfer agents for acrylic acid controlled radical polymerisation
AssigneeCoatex
InventorsJean-Marc SUAU, Christian Jacquemet
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Abstract
The invention relates to novel sulphur compounds, to the production thereof by a method carried out in an aqueous medium and the use thereof in the form of transfer agents in a method for controlled radical polymerisation of acrylic acid and/or acrylic acid with water-soluble monomers in water. The thus obtained polymers are usable in the form of dispersing agents or grinding aid agents and/or aid agents for combined grinding of mineral materials in an aqueous suspension and in the form of dispersing agents directly incorporated into aqueous formulations containing mineral materials.
Claims14
A process of reversible addition fragmentation transfer polymerization for preparing homopolymers of acrylic acid and/or copolymers of acrylic acid with at least one water-soluble monomer, comprising polymerizing (1) homopolymers of acrylic acid and/or (2) copolymers of acrylic acid with at least one water-soluble monomer, in water, in the presence of at least one transfer agent having a chemical structure in accordance with the following formula:
- where R1 designates an alkyl radical having 2 to 10 carbon atoms and/or an aromatic radical optionally substituted by an alkyl chain having 1 to 4 carbon atoms;
- and where M1 and M2 designate the hydrogen atom, an amine salt, ammonium cation, sodium cation, lithium cation or potassium cation, and are identical or different.
Dependencies are inferred from the claim text.