Patents by Inventor Christian Jacquemet

Christian Jacquemet has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11760886
    Abstract: 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.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: September 19, 2023
    Assignee: COATEX
    Inventors: Clementine Champagne, Christian Jacquemet, Benoit Magny, Jacques Mongoin, Jean-Marc Suau
  • Patent number: 11578214
    Abstract: The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: February 14, 2023
    Assignee: COATEX
    Inventors: Henri Grondin, Christian Jacquemet, Benoit Magny
  • Publication number: 20220145083
    Abstract: The present invention relates to a process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material, the use of a homopolymer or a copolymer in such a process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material, an aqueous suspension comprising a ground calcium carbonate-comprising material obtained by the process, and the use of an aqueous suspension comprising a ground calcium carbonate-comprising material in paper applications such as paper filling and paper coating applications, in coating applications, in paints, in adhesives, in sealants, in concrete, in agriculture applications, in food applications, in cosmetic applications, or in pharmaceutical applications.
    Type: Application
    Filed: February 24, 2020
    Publication date: May 12, 2022
    Applicant: OMYA INTERNATIONAL AG
    Inventors: Samuel RENTSCH, Jacques MONGOIN, Christian JACQUEMET
  • Publication number: 20220119621
    Abstract: A method may reduce the hygroscopicity of a material including calcium carbonate using at least one copolymer for assisting in grinding which is neutralized in a particular way, as well as a method for packaging such a material. The copolymer may have a molecular mass measured by SEC in a range of from 4,000 to 20,000 g/mol, and a polydispersity index in a range of from 1.5 to 4.0, and may be prepared by polymerizing acrylic acid and/or methacrylic acid, optionally in salt form, and non-ionic monomer(s) including hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, a C1-C5 acrylate ester, a C1-C5 methacrylate ester, or combinations thereof, wherein the carboxylic acid groups may be at least partially neutralized by 70 mol. % of Na+ and from 10 to 30 mol % of Na+, K+, and/or Li+.
    Type: Application
    Filed: February 24, 2020
    Publication date: April 21, 2022
    Applicant: COATEX
    Inventors: Christian JACQUEMET, Jacques MONGOIN, Jean-Marc SUAU
  • Publication number: 20220081569
    Abstract: The invention pertains to the field of materials based on calcium carbonate and in particular to the use thereof as a filler in polymeric plastics. The invention provides a method for reducing the hygroscopicity of a material (M) comprising calcium carbonate by treatment with at least one homopolymer grinding assistant (P) which is neutralized in a particular way. The invention pertains also to a method for producing said material (M), which is then of reduced hygroscopicity.
    Type: Application
    Filed: February 24, 2020
    Publication date: March 17, 2022
    Applicant: COATEX
    Inventors: Christian JACQUEMET, Jacques MONGOIN, Jean-Marc SUAU
  • Publication number: 20210214476
    Abstract: 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.
    Type: Application
    Filed: June 4, 2018
    Publication date: July 15, 2021
    Applicant: COATEX
    Inventors: Clementine CHAMPAGNE, Christian JACQUEMET, Laurie PARRENIN, Jean-Marc SUAU
  • Publication number: 20210171723
    Abstract: The invention concerns a method for preparing an aqueous mineral suspension from an aqueous metal ore residue into which a polymer (P) is introduced having a molecular mass Mw measured by GPC ranging from 2,000 to 20,000 g/mol and prepared by radical polymerisation of at least one anionic monomer (M). The invention also concerns the suspension produced, the Brookfield viscosity of which is lower than 1,800 mPa·s or the yield point of which is lower than 80 Pa.
    Type: Application
    Filed: June 5, 2019
    Publication date: June 10, 2021
    Applicant: COATEX
    Inventors: Mehdi BOUZID, Christian JACQUEMET, Benoit MAGNY, Jacques MONGOIN
  • Publication number: 20210171722
    Abstract: A method can prepare an aqueous mineral suspension from an aqueous metal ore residue into which there is introduced a polymer (P) having a molecular weight Mw measured by GPC of from 100,000 to 3.106 g/mol and prepared by free radical polymerization of at least one anionic monomer (m). The suspension produced may have a Brookfield viscosity greater than 2,000 mPa·s and/or a flow threshold of greater than 40 Pa.
    Type: Application
    Filed: June 5, 2019
    Publication date: June 10, 2021
    Applicant: COATEX
    Inventors: Mehdi BOUZID, Christian JACQUEMET, Benoit MAGNY, Jacques MONGOIN
  • Publication number: 20200291239
    Abstract: The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.
    Type: Application
    Filed: November 8, 2017
    Publication date: September 17, 2020
    Applicant: COATEX
    Inventors: Henri GRONDIN, Christian JACQUEMET, Benoit MAGNY
  • Publication number: 20200255669
    Abstract: 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.
    Type: Application
    Filed: December 14, 2017
    Publication date: August 13, 2020
    Applicant: COATEX
    Inventors: Clementine CHAMPAGNE, Christian JACQUEMET, Benoit MAGNY, Jacques MONGOIN, Jean-Marc SUAU
  • Patent number: 10689519
    Abstract: The present invention relates to a process for producing an aqueous suspension of precipitated calcium carbonate, an aqueous suspension of precipitated calcium carbonate and a precipitated calcium carbonate obtained by the process, a product comprising the aqueous suspension of precipitated calcium carbonate or the precipitated calcium carbonate as well as its use.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: June 23, 2020
    Assignee: OMYA INTERNATIONAL AG
    Inventors: Marc Maurer, Christian Jacquemet
  • Patent number: 10501634
    Abstract: The present invention relates to a process for producing an aqueous suspension of precipitated calcium carbonate, an aqueous suspension of precipitated calcium carbonate and a precipitated calcium carbonate obtained by the process, a process comprising the precipitated calcium carbonate and its use.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: December 10, 2019
    Assignee: Omya International AG
    Inventors: Marc Maurer, Holger Spiegel, Christian Jacquemet
  • Patent number: 10233330
    Abstract: The present invention relates to a ternary mixture consisting of at least one homopolymer or copolymer of (meth)acrylic acid, partially or completely neutralized with sodium, with potassium, with lithium and/or with an amine, at least one solution of silicate or metasilicate chosen from the group consisting of a sodium silicate of formula Na2O.nSiO2 (with n varying between 1 and 4), sodium metasilicate Na2SiO3, a potassium silicate K2O.nSiO2 (with n varying between 1 and 4), potassium metasilicate K2SiO3 and a mixture of these compounds, and at least one base, as dispersion and/or grinding aid agents of kaolin in aqueous suspension.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: March 19, 2019
    Assignee: COATEX
    Inventors: Jacques Mongoin, Christian Jacquemet, Yves Matter, Jean-Marc Suau
  • Publication number: 20180319991
    Abstract: The present invention relates to a process for producing an aqueous suspension of precipitated calcium carbonate, an aqueous suspension of precipitated calcium carbonate and a precipitated calcium carbonate obtained by the process, a product comprising the aqueous suspension of precipitated calcium carbonate or the precipitated calcium carbonate as well as its use.
    Type: Application
    Filed: October 13, 2016
    Publication date: November 8, 2018
    Inventors: Marc MAURER, Christian JACQUEMET
  • Publication number: 20180282172
    Abstract: The invention relates to the use of copolymers obtained by the polymerisation of styrene maleic anhydride, functionalised or not, for producing an aqueous suspension of precipitated calcium carbonate (PCC) by slaking a material containing calcium oxide in water then by carbonation of the milk of lime thus produced.
    Type: Application
    Filed: October 13, 2016
    Publication date: October 4, 2018
    Applicant: COATEX
    Inventor: Christian JACQUEMET
  • Publication number: 20180273395
    Abstract: The present invention relates to the use of at least one cationic polymer in a method for manufacturing a precipitated calcium carbonate aqueous suspension, in which a milk of lime is prepared by mixing water, a calcium oxide containing material, said at least one cationic polymer, optionally at least one slaking additive, said milk of lime being them carbonated to form a precipitated calcium carbonate aqueous suspension.
    Type: Application
    Filed: February 24, 2016
    Publication date: September 27, 2018
    Applicant: COATEX
    Inventor: Christian JACQUEMET
  • Publication number: 20180222765
    Abstract: The present invention is directed to a process for producing an aqueous suspension of precipitated calcium carbonate, wherein a milk of lime is prepared by mixing water, a calcium oxide containing material, at least one water-soluble polymer having a molecular weight Mw in the range from 200 to 6500 g/mol, and at least one slaking additive, and subsequently, the milk of lime is carbonated to form an aqueous suspension of precipitated calcium carbonate.
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Inventors: Marc Maurer, Christian Jacquemet, Mathieu Skrzypczak
  • Publication number: 20180170765
    Abstract: The present invention relates to the use of a depolymerized carboxylated cellulose solution for preparing an aqueous Precipitated Calcium Carbonate (PCC) slurry by slaking a material containing calcium oxide in water, followed by carbonation of the milk of lime thus obtained. The depolymerized carboxylated cellulose solution has a solid content of 25 wt. % to 40 wt. %, based on the total weight of the solution and a molecular weight of between 10 000 g/mol to 40 000 g/mol.
    Type: Application
    Filed: June 30, 2016
    Publication date: June 21, 2018
    Applicant: COATEX
    Inventor: Christian JACQUEMET
  • Patent number: 10000388
    Abstract: The present invention is directed to a process for producing an aqueous suspension of precipitated calcium carbonate, wherein a milk of lime is prepared by mixing water, a calcium oxide containing material, at least one water-soluble polymer having a molecular weight Mw in the range from 200 to 6500 g/mol, and at least one slaking additive, and subsequently, the milk of lime is carbonated to form an aqueous suspension of precipitated calcium carbonate.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: June 19, 2018
    Assignees: Omya International AG, Coatex
    Inventors: Marc Maurer, Christian Jacquemet, Mathieu Skrzypczak
  • Publication number: 20180134897
    Abstract: The present invention relates to a process for producing an aqueous suspension of precipitated calcium carbonate, wherein a depolymerized carboxylated cellulose is added during lime slaking. Furthermore, the present invention relates to an aqueous suspension of calcium carbonate and a precipitated calcium carbonate obtained by said process as well as the use thereof.
    Type: Application
    Filed: July 15, 2016
    Publication date: May 17, 2018
    Inventors: Marc Maurer, Thomas Schlotterbach, Christian Jacquemet