Polymers produced by using sulphur compounds in the form of transfer agents for controlled radical polymerisation of acrylic acid and the use thereof
AssigneeCoatex
InventorsJean-Marc Suau, Christian Jacquemet
Life of this patent
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Abstract
The invention concerns the polymers obtained by the use of sulphur compounds in a process for controlled radical polymerisation in water of acrylic acid and/or acrylic acid with hydrosoluble monomers. It concerns also their uses as dispersant agents or agents to aid grinding and/or co-grinding of mineral matters in aqueous suspensions, and as dispersant agents incorporated directly in aqueous formulations containing mineral matters. Finally, the invention concerns the formulations of mineral matters obtained in this manner.
Claims47
A method of grinding and/or co-grinding mineral matter, the method comprising grinding and/or co-grinding the mineral matter in the presence of a homopolymer of acrylic acid and/or copolymer of acrylic acid with a hydrosoluble monomer, wherein the homopolymer and/or copolymer has a polymolecularity index of under 2.2 determined in an aqueous media by a gel permeation chromatographic (GPC) method, having as a standard a series of 5 sodium polyacrylate standards suppled by Polymer Standard Service a references PAA 18K, PAA 8K, PAA 5K, PAA 4K and PAA 3K, and the homopolymer and/or copolymer comprises at an end of the homopolymer and/or copolymer chain a pattern in accordance with the following formula (I):
- wherein
- R1 is an alkyl radical having 1 to 10 carbon atoms or an aromatic radical that is optionally substituted by an alkyl chain having 1 to 4 carbon atoms;
- and
- M is a hydrogen atom, an amine salt, ammonium or an alkaline cation.
A method of dispersing mineral mater in a solution, the method comprising dispersing the mineral matter with a homopolymer of acrylic acid and/or copolymer of acrylic acid with a hydrosoluble monomer, wherein the homopolymer and/or copolymer has a polymolecularity index of under 2.2 determined in an aqueous media by a gel permeation chromatographic (GPC) method, having as a standard a series of 5 sodium polyacrylate standards suppled by Polymer Standard Service a references PAA 18K, PAA 8K, PAA 5K, PAA 4K and PAA 3K, and the homopolymer and/or copolymer comprises at an end of the homopolymer and/or copolymer chain a pattern in accordance with the following formula (I):
- wherein
- R1 is an alkyl radical having 1 to 10 carbon atoms or an aromatic radical that is optionally substituted by an alkyl chain having 1 to 4 carbon atoms;
- and
- M is a hydrogen atom, an amine salt, ammonium or an alkaline cation.
An aqueous suspension comprising ground mineral matter, wherein the ground mineral matter is produced by grinding mineral matter in the presence of a homopolymer of acrylic acid and/or copolymer of acrylic acid with a hydrosoluble monomer, wherein the homopolymer and/or copolymer has a polymolecularity index of under 2.2 determined in an aqueous media by a gel permeation chromatographic (GPC) method, having as a standard a series of 5 sodium polyacrylate standards suppled by Polymer Standard Service a references PAA 18K, PAA 8K, PAA 5K, PAA 4K and PAA 3K, and the homopolymer and/or copolymer comprises at an end of the homopolymer and/or copolymer chain a pattern in accordance with the following formula (I):
- wherein
- R1 is an alkyl radical having 1 to 10 carbon atoms or an aromatic radical that is optionally substituted by an alkyl chain having 1 to 4 carbon atoms;
- and
- M is a hydrogen atom, an amine salt, ammonium or an alkaline cation;
- and
- wherein the ground mineral matter comprises a material selected from the group consisting of a calcium carbonate, a dolomite, kaolin, talc, gypsum, titanium oxide, satin white, aluminium trihydroxide, mica, natural fibres, and mixtures thereof.
A method of forming a formulation, the method comprising forming the formulation with a homopolymer of acrylic acid and/or copolymer of acrylic acid with a hydrosoluble monomer, wherein the homopolymer and/or copolymer has a polymolecularity index of under 2.2 determined in an aqueous media by a gel permeation chromatographic (GPC) method, having as a standard a series of 5 sodium polyacrylate standards suppled by Polymer Standard Service a references PAA 18K, PAA 8K, PAA 5K, PAA 4K and PAA 3K, and the homopolymer and/or copolymer comprises at an end of the homopolymer and/or copolymer chain a pattern in accordance with the following formula (I):
- wherein
- R1 is an alkyl radical having 1 to 10 carbon atoms or an aromatic radical that is optionally substituted by an alkyl chain having 1 to 4 carbon atoms;
- and
- M is a hydrogen atom, an amine salt, ammonium or an alkaline cation.
A formulation comprising a homopolymer of acrylic acid and/or copolymer of acrylic acid with a hydrosoluble monomer, wherein the homopolymer and/or copolymer has a polymolecularity index of under 2.2 determined in an aqueous media by a gel permeation chromatographic (GPC) method, having as a standard a series of 5 sodium polyacrylate standards suppled by Polymer Standard Service a references PAA 18K, PAA 8K, PAA 5K, PAA 4K and PAA 3K, and the homopolymer and/or copolymer comprises at an end of the homopolymer and/or copolymer chain a pattern in accordance with the following formula (I):
- wherein
- R1 is an alkyl radical having 1 to 10 carbon atoms or an aromatic radical that is optionally substituted by an alkyl chain having 1 to 4 carbon atoms;
- and
- M is a hydrogen atom, an amine salt, ammonium or an alkaline cation.
Dependencies are inferred from the claim text.