Coatex S.a.

Coatex S.a.s.

Societe D'exploitation Des Procedes Coatex

Jean-Bernard Egraz

Jean-Marc Suau

Matthias Buri

Olivier Guerret

Georges Ravet

Jacques Mongoin

Henri Grondin

Rene Blum

Yves Kensicher

Christian Jacquemet

Pierre Blanchard

Jacky Rousset

Jacques Laluet

Isabelle Capra-Ogier

Benoit Simonet

Pierre Fabre

Andre Rambert

Gilles Bousquet

Jerome Claverie

Catherine Ladaviere

Maryvonne Brigodiot-Ignazi

Isabelle Peixoto

Thierry Lalot

Gilles Letetour

The present invention concerns a process for controlled radical polymerisation of acrylic acid and its salts in a reactive medium constituted solely of water. The invention also concerns homopolymers and copolymers of acrylic acid obtained by the polymerisation process. Finally, the invention concerns the use of the said homopolymers and copolymers of acrylic acid in fields of industry such as the paper field and in particular the coating of paper and the mass-filling of paper, the oil field, or the fields of paint, water treatment, detergency, ceramics, cements or hydraulic binders, public works, inks and varnishes, sizing of textiles or the finishing of leather.

Method for the controlled radical polymerisation of acrylic acid and the salts thereof, polymers thus obtained and applications thereof

The present invention relates to the technical sector of the polymerisation of acrylic acid and its salts, more particularly in solution, more particularly by controlled radical method, the use of the corresponding organo-sulphurated transfer agents, the acrylic acid polymers thus obtained, having a very low polydispersity PD (or very low polymolecularity index IP, which is an equivalent term), and their applications in industry.

Method of controlled free radical polymerisation of acrylic acid and its salts thereof, resulting low-polydispersity polymers, and their uses

A method of obtaining homopolymers and/or copolymers in aqueous solution by the use of phosphorous acid and/or its salts or sodium hypophosphite and by neutralization during the polymerisation of the ethylenically unsaturated monomers by the continuous addition, first of all, of bases such as sodium hydroxide, potassium hydroxide or lithium hydroxide and then bases of alkaline earths such as calcium hydroxide, magnesium hydroxide, calcium oxide or magnesium oxide. The polymers obtained by the said method and uses thereof.

Method for obtaining water-soluble polymers, resulting polymers and uses thereof

Water-retaining and optical-brightener-activating polymer composition, paper coating colors and sheets of coated paper thus obtained

Water-retaining and optical-brightner-activating polymer composition, paper coating colors and sheets of coated paper thus obtained

Homopolymers and/or copolymers are manufactured by polymerizing ethylenically monounsaturated monomer(s) in an aqueous solution in a reaction vessel containing compounds which contain a phosphorus atom of degree of oxidation less than 5, phosphorous compounds being introduced in amounts of 0.005-0.49 gram-atom phosphorus per mol of unsaturation in said ethylenically unsaturated monomer(s) in the presence of hydrogen peroxide and in the absence of any agent(s) which decomposes hydrogen peroxide thereby forming free radicals, in the absence of any other generator of free radicals, and in the absence of any per salt and/or any other transfer agent.

Method of manufacturing water-soluble polymers, polymers manufactured thereby, and uses of said polymers

A method of producing milling adjuvants and/or dispersing agents, with the use of a separation apparatus which is comprised of one or more organic and/or mineral membranes; a milling adjuvant and/or dispersing agent produced by said method; and use of said adjuvant/agent in preparing an aqueous suspension of mineral particles; and the use of the aqueous suspension in applications involving pigments.

Method of producing milling adjuvants and/or dispersive agents, by

A method of dispersing mineral substances in aqueous media, comprising combining:

Use of a copolymer with a surface-active structure as a dispersing

Method of manufacturing water-soluble polymers, polymers manufactured

Method of producing milling adjuvants and/or dispersive agents by

A process for preparing acrylic or methacrylic acid amides functionalized with a cationizable tertiary amine, by aminolysis of acrylic or methacrylic acid esters with the aid of enzymes.

Process for preparation of acrylic or methacrylic acid amides

Copolymer dispersants for use in an aqueous emulsion containing fillers pigments or both where the copolymer has the formula (I)

Copolymer dispersants for providing improved water resistance to filled

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Ecully, France

Jean-Bernard Egraz