Coatex

Arkema France

Clementine Champagne

Jean-Marc Suau

Benoit Magny

Christian Jacquemet

Jacques Mongoin

Yves Kensicher

David Platel

Laurie Parrenin

Delphine Bony

Olivier Guerret

Francois Dupont

Yves Matter

Mehdi Bouzid

Francis Bony

Hervé Cavalie

Christophe Verge

A polymer may have a molecular mass of less than 8,000 g/mol and a polymolecularity index PI of less than 3, produced by free radical polymerization, in water, and at a temperature higher than 50° C., of at least one anionic monomer comprising at least one polymerizable olefinic unsaturation and at least one carboxylic acid function, in the presence of phosphorus with a degree of oxidation I, phosphorus with a degree of oxidation III and a radical-generating compound. Such polymers may be produced and use for grinding mineral matter, as a detergent agent, or as an anti-scaling agent.

Copolymer and grinding of a mineral matter

A water-rinsable, aqueous cleansing formulation may include a cosmetic oily component. The formulation may foam and remain stable despite the presence of a cosmetic oily component, even when the oily component is present in potentially substantial amounts.

Cosmetic cleansing formulation

The present invention relates to a method for producing mineral particles grinding a mineral material in the presence of a specific anionic polymer. The polymer used is obtained by means of polymerisation in the presence of sodium hypophosphite, disodium dipropionate trithiocarbonate and at least one radical-generating compound. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a paper coating slip composition.

Method for grinding mineral material

The invention relates to a paper coating slip composition comprising a copolymer of thickening acrylic acid, a mineral material in the form of particles, a binding agent, and water. The invention also relates to the use of said composition for the production of paper or cardboard, improving the water retention of the paper coating slip.

Composition for paper coating slip

The invention relates to the field of preparing aqueous dispersions of organic, organometallic or inorganic particles. In particular, the invention relates to the preparation of aqueous suspensions comprising organic, organometallic or inorganic particles and at least one particular copolymer obtained by polymerization of at least one acid and at least one compound or at least one ester derived from a particular acid, in the presence of water, at least one initiator compound and at least one activator compound, followed by total or partial neutralization by means of at least one compound chosen from alkali metal hydroxides, alkaline earth metal hydroxides, alkaline earth metal dihydroxides and mixtures thereof. The invention relates to such a particular copolymer having a low polydispersity index and weight-average molecular weight, the preparation process thereof and the use thereof, especially for the preparation of an aqueous paint composition.

Water-soluble copolymer and use thereof as dispersant for suspension of particles

The invention relates to a process for preparing a dispersion of a lipophilic compound in a continuous hydrophilic phase, the morphology of which is submicronic. During the preparation of this dispersion, there is applied, by means of a device which produces a shearing gradient less than 5000 s, a shear stress from 100 to 5000 Pa during the addition of the lipophilic compound in the continuous phase which comprises a rheology-modifying compound selected from anionic copolymers, preferably an anionic polymer, in particular an ASE polymer or a HASE polymer. The dispersed particles of the lipophilic compound are nanometric particles whose size is less than 1 &#x3bc;m. The dispersion, particularly in the form of an emulsion, can be used in numerous fields.

Submicronic emulsion

(EN) The invention relates to the field involved in the production of aqueous compositions comprising rheology modifying agents, in particular the production of aqueous detergent or cosmetic compositions having improved, thickening and clarity properties, as well as good suspension properties. In particular, the invention relates to a rheology modifying agent which is a copolymer obtained by means of polymerisation of at least one crosslinking monomer with at least one anionic monomer comprising at least one polymerisable ethylenic unsaturation and at least one hydrophobic non-ionic monomer comprising at least one polymerisable ethylenic unsaturation.

Copolymer having thickening and suspension properties

The invention relates to the preparation of a water-soluble anionic polymer, the weight-average molecular mass Mof which ranges from 1,000 to 10,000 g/mol and the polydispersity index Iof which is less than 3.5. The polymer according to the invention is obtained by a polymerization reaction in water of an unsaturated anionic monomer, in the presence of Cuor of Cuand of an aromatic compound comprising a functional group chosen from hydroxyl, primary amine, secondary amine and tertiary amine directly bonded to the aromatic ring. The invention also relates to an aqueous composition comprising the polymer according to the invention.

Method for preparing a polymer

The present invention relates to the synthesis of an associative acrylic (co)polymer by aqueous emulsion radical polymerization. The (co)polymer contains at least one oligomer of acrylic acid represented by the formula (I): where n is an integer ranging from 1 to 10. The oligomer is prepared from acrylic acid at a temperature of between 50&#xb0; C. and 200&#xb0; C. in the presence of a basic or acid catalyst, water, and polymerization inhibitors. The present invention also relates to the associative acrylic (co)polymer obtained from the method and also to the use of this (co)polymer as a thickener in various formulations.

Method for the synthesis of acrylic (co)polymers from oligomers of acrylic acid

The invention relates to the field of the production of aqueous compositions comprising rheology-modifying agents, in particular the production of aqueous cosmetic or detergent compositions having improved thickening and clarity properties and also good suspending properties. In particular, the invention relates to a rheology-modifying agent which is a copolymer obtained by polymerization of at least one cross-linking monomer with at least one anionic monomer comprising at least one polymerizable ethylenic unsaturation and at least one hydrophobic nonionic monomer comprising at least one polymerizable ethylenic unsaturation.

Novel copolymers obtained by polymerisation a mixture of monomers comprising: at least one anionic monomer (a) comprising a polymerisable unsaturated function and a carboxylic group; and at least one monomer (b) of formula (I):HC&#x2550;C(&#x2014;R)&#x2014;(CH)&#x2014;O-[(EO)&#x2014;(PO)]&#x2014;H&#x2003;&#x2003;(I)where [(EO)&#x2014;(PO)] represents a polyalkoxylated chain consisting of ethoxylated units EO and propoxylated units PO, distributed into blocks, alternating or statistical, the molar proportion of the ethoxylated units in the polyalkoxylated chain (n)/(m+n) being greater than or equal to 70% and strictly less than 90%. In addition, hydraulic composition, for example concrete compositions, comprising such copolymers, and the use of said copolymers as water-reducing agents in hydraulic compositions and for increasing the early mechanical strength of a hydraulic composition.

Copolymer as a water-reducing agent in a hydraulic composition and use of copolymers for improving the early mechanical strength of a hydraulic composition

The invention relates to multiphasic polymers comprising from 45% to 95% by weight of a first polymer P1 and from 5% to 55% by weight of a second polymer P2, said polymers P1 and P2 being of distinct compositions, It also relates to a method for the preparation of these polymers, to aqueous compositions comprising them and to their use as thickening and suspending agents.

Multiphasic polymer as a thickening and suspending agent

The present invention relates to a polymer obtained by radical polymerization of a mixture of monomers comprising: at least one anionic monomer (a) having a polymerizable vinyl function; at least one non-ionic hydrophobic monomer (b) having a polymerizable vinyl function; and one or more crosslinking monomer(s) (c) including at least one compound of formula (I) in which R is a hydrogen atom or a methyl group, n is zero or an integer from 1 to 30, and Ris a linear or branched C-Calkylene group. The present invention also relates to a process for the preparation thereof by radical polymerization, to an aqueous composition comprising same, to the use thereof as a thickener and suspending agent and also to the use of a monomer of formula (I) for synthesizing a polymer.

Polymer as thickener and suspending agent

The present invention relates to a continuous process for preparing a comb polymer, without organic solvent, by esterification and/or amidification of an acidic homopolymer or copolymer, which consists in performing the esterification and/or amidification of said homopolymer/copolymer by reaction at elevated temperature in the mixing and transportation zone of a tubular reactor, optionally equipped with a water removal system, in the presence of at least one poly(alkylene glycol) in solid or molten form and of an antioxidant, said esterification and/or amidification taking place at a temperature greater than or equal to 170&#xb0; C.

Continuous esterification and/or amidification method, without organic solvent, of an acid homopolymer or copolymer

The present invention relates to the novel method for the preparation of a polymer of (meth)acrylic acid in aqueous solution, said polymer having a molecular mass of less than 6,500 g/mol, as measured by SEC, using a compound of copper carbonate type or one of its derivatives and a compound of formula (I): 

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Caluire-et-Cuire, France

Clementine Champagne