Coatex S.a.

Omya International Ag

Coatex S.a.s.

Conservatome S.a.

Societe Coatex

Total Compagnie Francaise Des Petroles S.a.

Omya Development Ag

Jacky Rousset

Georges Ravet

Hubert Bousquet

Olivier Gonnet

Jean-Bernard Egraz

Pierre Bouchut

Jean Moro

Patrick A C Gane

Matthias Buri

Olivier Guerret

Jacques Mongoin

Christian Jacquemet

Yves Kensicher

Henri Grondin

Daniel Baffreau

Marie-Christine P Leblanc

Roger P Chavrier

Yves Roca

Gilles Letetour

Patrick Gane

Pierre Martineu

Christiane Saunier

Georges Saunders

The invention concerns a process to manufacture a thermoplastic resin charged with mineral or carbonated matter, and possibly containing an organic impact modifier, through the introduction into the said resin of a comb polymer with at least one ethylenic unsaturation monomer, to which is grafted at least one polyalkylene oxide function. The resins then obtained which also form the subject of the invention have an improved impact resistance without their rigidity being degraded.

Method of producing an impact-resistant thermoplastic resin

Ground calcium carbonate is prepared by a process of grinding a suspension containing calcium carbonate to be ground and a water-soluble grinding agent in an aqueous medium while the temperature of the aqueous suspension is kept at below 60.degree. C.

Process for grinding calcium carbonate in aqueous media

Water-soluble polymers and/or copolymers possessing enhanced biodegradability, and their applications are disclosed. Acrylic and/or vinyl polymers and/or copolymers containing acid groups, in which 35% to 90% of the active acid sites are neutralized by magnesium ions, the specific viscosity is at most 25, and biodegradability is enhanced. Their decomposition after 36 days is greater than 50% as measured by the modified Sturm test. These polymers can be used in industries as varied as: paper-making, paints, plastics, petroleum, drilling fluids, water treatment, detergents, cosmetics, textiles, inks, leather, grinding and/or splitting of minerals in water.

Water-soluble polymers and/or copolymers possessing increased

Copolymers for stabilizing aqueous suspensions of sodium silico-aluminates or zeolites, which are crosslinked, soluble in water, at least at pH 7 or above, and consist essentially of:

Non-toxic stabilizing agent for aqueous suspensions of sodium

Ground calcium carbonate is prepared by a process of grinding a suspension containing calcium carbonate and a water-soluble grinding agent in an aqueous medium while the temperature of the aqueous suspension is kept at or below 60.degree. C.

A water-soluble complexing agent of metallic cations having a high complexing power and a high threshhold effect, constituted from acrylic copolymers, characterized by the fact that said agent is formed by terpolymers comprising acrylic and methacrylic and itaconic units of the general formula: ##STR1## in which the indices, expressed in percent by weight have at least a value of 10 for x and y, and a value of 5 for z.

Water soluble complexing agent for metallic cations

A non-polluting dispersing agent for drilling fluids based on soft water or salt water. A dispersing agent for aqueous drilling fluids, optionally saline, belonging to the group of polymers and/or copolymers containing acid functions which is characterized in that, to ensure that these fluids retain their rheological characteristics, even under the extreme temperature and pressure conditions prevailing in deep bore holes, said dispersing agent is a salt of said polymers and/or copolymers of which the salifying cation corresponds to a metal having a Pauling electronegativity at least equal to 0.95 and preferably greater than 1.

Non-polluting dispersing agent for drilling fluids based on freshwater

A granular polymer composition having increased water absorption and desorption capability, resistance to photogradation and increased life span, comprising a water-insoluble but swellable cross-linked polymer material formed of at least one polymer and/or copolymer prepared from at least one unsaturated ethylene monomer having at least one carboxylic, amide, sulfuric, sulfonic, phosphoric, phosphonic, or hydroxyl functional group and at least one powdered mineral charge well dispersed in and intimately bonded to said polymer as a result of its introduction into the mixture of monomers of the same type or of a different type before their polymerization into said polymer or copolymer.

Polymer composition charged with powdered mineral material with a high

Grinding agent based upon neutralized polymers and/or copolymers for an aqueous suspension of coarse mineral materials for applications in pigments consisting of acid acrylic polymers and/or copolymers which are entirely neutralized by at least one neutralizing agent having a monovalent function and at least one neutralizing agent having a polyvalent function.

Grinding agent based upon neutralized acrylic polymers and/or copolymers

An agent to be used to treat water and aqueous media contacting heat transfer surfaces for inhibiting the build-up of scale and settlement of dissolved alkaline earth materials in water and aqueous media, which agent consists of acrylic and methacrylic acid polymers and/or copolymers and is characterized in that it comprises the fraction of said polymers and/or copolymers having a symmetrical, single-mode molecular weight distribution centered on an average molecular weight of about 800, in which 100% of said molecular weights are individually lower than 1,200 and at least 90% of same are in the 400-1,000 range.

Scale and settlement inhibiting agent for use in treating industrial

Grinding agent based upon acrylic polymers and/or copolymers for aqueous suspension of coarse mineral materials for applications in pigments. Grinding agent for aqueous suspensions of mineral materials intended for application in pigments, consisting of an acid acrylic polymer and/or copolymer which is partially neutralized by at least one neutralizing agent having at least one monovalent function. The grinding agent according to the invention is applicable more particularly to the preparation by grinding of mineral materials such as calcium carbonate, dolomites, calcium sulphate, kaolin, titanium dioxide, intended for pigmentary applications as varied as paper coating, pigmentation of paints, fillers of rubbers or synthetic resins or matting synthetic textiles.

Grinding agent based and/or copolymers for aqueous suspension of coarse

Non-polluting thinning adjuvant for sea-water and/or fresh-water based drilling muds. Non-polluting thinning adjuvant for sea-water and/or fresh-water based drilling muds, with the aim to maintain their rheological characteristics in the extreme conditions of temperature and pressure which prevail in wells drilled at great depths. This thinning adjuvant is characterized by the fact that it is a hydrosoluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid. Its general formula is: ##STR1## in which the indices m,n,p -expressed in % in mole- are chosen from the following intervals:

Non-polluting thinning adjuvant for sea-water and/or fresh water based

Acid compositions with high concentrations of active ingredients intended for the treatment of industrial or domestic waters and for cleaning the corresponding industrial or sanitary installations, comprising carboxylic polymer materials, a strong acid, possibly a salt of a divalent metal and possibly known specific agents, which comprise:

Acid composition with high concentrations of active materials for the

A water soluble ethylenic copolymer-based dispersant for water-based pigment compounds, comprising a liquid phase, a binder which is an emulsion polymer, especially without protective colloids and which contains a considerable density of anionic groups, of pigments wholly or partially reactive with regard to their medium by the creation of bonds between the particles of emulsion polymer and the metallic ion of the partially soluble reactive pigment, characterized by the fact that in order to confer on such water-based pigment compounds definable rheological characteristics, which can be adjusted in advance and remain stable over periods of time, the said water soluble dispersant is an acrylic, methacrylic and itaconic acid copolymer.

Water soluble dispersant for water-based pigment compounds comprising a

Hydraulic cement composition with delayed setting, intended to be employed in an environment which may be under extreme temperature, pressure and salinity conditions, the composition being characterized in that it incorporates

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Saint-Trivier-Sur-Moignans, France

Jacky Rousset