Patents Assigned to Coatex
  • Patent number: 4845191
    Abstract: Grinding agent for aqueous suspension of coarse mineral materials intended for pigment applications, composed of an alkaline acrylic polymer and/or copolymer, with an average specific viscosity of less than 0.8, formed of a fraction of this polymer and/or copolymer isolated by means of a polar solvent, the specific viscosity of said fraction comprised between 0.3 and 0.8.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: July 4, 1989
    Assignee: Coatex
    Inventor: Gabriel Hautier
  • Patent number: 4842651
    Abstract: A pre-treatment of rough pigmentary mineral materials to eliminate the viscosifying effect of the swelling clays present in said materials used to condition said materials before refining them in an aqueous medium by abrasion or grinding. The method enables the production of refined pigmentary suspensions with a concentration of at least 75% by weight and low viscosity and stable over time. The pre-treatment agent is comprised of acid polymers and/or copolymers containing at least one carboxylate ethylenic monomer. Suspensions with high concentration of pigmentary mineral materials are prepared from the conditioned materials.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: June 27, 1989
    Assignee: Coatex S.A.
    Inventors: Georges Ravet, Catherine Bonnet, Jacques Mongoin
  • Patent number: 4840985
    Abstract: 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.
    Type: Grant
    Filed: September 23, 1987
    Date of Patent: June 20, 1989
    Assignee: Coatex, S. A.
    Inventors: Olivier Gonnet, Georges Ravet, Jacky Rousset
  • Patent number: 4782120
    Abstract: 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:0%<m<90%2%<n<100%0%<p<90%and where radicals R.sub.1, R.sub.2 and R.sub.4 are chosen from the group consisting of H and the alkyles, and radical R.sub.3 is chosen from the group consisting of alkylenes and alkylene-oxides and/or polyalkylene oxides.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: November 1, 1988
    Assignee: Coatex, S.A.
    Inventors: Jacky Rousset, Jean-Bernard Egraz, Gilles Letetour
  • Patent number: 4775420
    Abstract: Complex pigment compositions for the coating of paper, comprising an aqueous phase, at least one pigment of mineral origin, a binding agent, optionally various customary additives, and a dispersing agent comprised of carboxyl-containing polymers which are water soluble and are converted to form salts. The polymers are obtained by known polymerization processes. The dispersing agent(a) has a specific viscosity (measured on the sodium salt) of between 0.25 and 2; and(b) is converted to the salt form to the extent of at least 60% by at least one salt-forming agent which has a polyvalent function.These complex pigment compositions have very low viscosities. They may also simultaneously contain diverse pigments, such as kaolin, titanium dioxode, and calcium carbonate, without suffering the usual increase in viscosity and the risk of setting.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: October 4, 1988
    Assignee: Coatex, S.A.
    Inventors: Olivier Gonnet, Jean Vallas
  • Patent number: 4765921
    Abstract: 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:(a) from 10 to 60% by weight expressed in anhydrous form of a water-soluble carboxylic polymer in its acid form containing at least 5% by weight and preferably at least 10% by weight of itaconic acid,(b) from 10 to 80% by weight expressed in anhydrous form of at least one strong acid,(c) from 0 to 15% by weight expressed in anhydrous form of zinc in the form of Zn.sup.2+ ions,(d) from 0.1 to 10% by weight expressed in anhydrous form of specific agents,(e) from 5 to 65% by weight of water.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: August 23, 1988
    Assignee: Coatex S.A.
    Inventors: Jacky Rousset, Jean Moro
  • Patent number: 4687789
    Abstract: 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.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: August 18, 1987
    Assignee: Coatex S.A.
    Inventors: Olivier Gonnet, Jacky Rousset
  • Patent number: 4681634
    Abstract: 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(a) a saline or nonsaline aqueous liquid phase,(b) at least one hydraulic cement,(c) a setting-retarder adjuvant preserving and/or improving the rheological properties, a water-soluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: July 21, 1987
    Assignees: Coatex S.A., Total Compagnie Francaise des Petroles S.A.
    Inventors: Yves Roca, Jacky Rousset, Pierre Bouchut, Marie-Christine Leblanc, Daniel Baffreau
  • Patent number: 4424290
    Abstract: An additive for swelling clay grouts and cement-swelling clay grouts, intended to reduce the filtrate, lower and stabilize viscosity, retard rigidification time, limit sweating and sedimentation of the solid constituents, is an alkaline ethylenic acid polymer and/or copolymer, with molecular weight between 500 and 20,000, but preferably between 1000 and 6000.This additive is especially advantageous in the fields of civil engineering, building, public works and drilling.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: January 3, 1984
    Assignee: Societe Coatex
    Inventors: Jacky Rousset, Roger P. Chavrier
  • Patent number: 4282140
    Abstract: New medical self-polymerizable sealing cement with an acrylic polymer and/or copolymer base, applicable for prosthetic implants, which is obtained by mixing a liquid phase and a solid phase. The liquid phase, being viscous, forms a collodion of an acrylic polymer and/or copolymer in at least one monomer, while the solid phase is composed of an acrylic polymer and/or copolymer possibly containing a mineral load.The new cement is not dangerous for the patient, due to an absence of monomer exudation and due to a polymerization temperature which is always lower than the mobilization temperature of human fat.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: August 4, 1981
    Assignee: Societe d'Exploitation des Procedes Coatex
    Inventors: Gilles Bousquet, Jean-Bernard Egraz, Andre Rambert, Georges Ravet