Patents by Inventor Patrice Defer

Patrice Defer 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).

  • PROCESS FOR THE CONTINUOUS PREPARATION OF HEAVY ALKYL ACRYLATES
    Publication number: 20230002310
    Abstract: The present invention relates to a process for the continuous synthesis of heavy alkyl acrylates by a transesterification reaction using hydrozincite as a heterogeneous catalyst.
    Type: Application
    Filed: December 9, 2020
    Publication date: January 5, 2023
    Inventors: Clement Bellini, Sandra Maget, Patrice Defer
  • Aminoalkyl (meth)acrylate stabilisation
    Patent number: 11485702
    Abstract: The present invention relates to the use of a stabilizing composition comprising at least one N-oxyl compound and at least one polymerization inhibitor other than an N-oxyl compound, for inhibiting transesterification catalyst degradation in a process for the synthesis of aminoalkyl (meth)acrylates. Preferably, the transesterification catalyst is a titanium organometallic compound and the stabilising composition comprises at least one N-oxyl derivative and at least one polymerization inhibitor chosen from phenolic compounds and phenothiazine compounds in a weight ratio of between 1 and 10, preferably between 4 and 10, limits inclusive.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: November 1, 2022
    Assignee: Arkema France
    Inventors: Clement Bellini, Yves Cabon, Patrice Defer
  • AMINOALKYL (METH)ACRYLATE STABILISATION
    Publication number: 20210380523
    Abstract: The present invention relates to the use of a stabilizing composition comprising at least one N-oxyl compound and at least one polymerization inhibitor other than an N-oxyl compound, for inhibiting transesterification catalyst degradation in a process for the synthesis of aminoalkyl (meth)acrylates. Preferably, the transesterification catalyst is a titanium organometallic compound and the stabilising composition comprises at least one N-oxyl derivative and at least one polymerization inhibitor chosen from phenolic compounds and phenothiazine compounds in a weight ratio of between 1 and 10, preferably between 4 and 10, limits inclusive.
    Type: Application
    Filed: September 18, 2019
    Publication date: December 9, 2021
    Inventors: Clément BELLINI, Yves CABON, Patrice DEFER
  • Process for the synthesis of acrylic acid oligomers
    Patent number: 10183907
    Abstract: A process for the synthesis of acrylic acid oligomer represented by formula (I): in which n is an integer ranging from 1 to 10, wherein the process comprises the step of heating acrylic acid at a temperature from 50° C. to 200° C. in the presence of a catalyst, water and at least one polymerization inhibitor. Formula (I) where n=0 is acrylic acid, the precursor for preparing the acrylic acid oligomer.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 22, 2019
    Assignee: Arkema France
    Inventors: Reinhard Linemann, Benoit Riflade, Serge Tretjak, Andre Levray, Patrice Defer
  • PROCESS FOR THE SYNTHESIS OF ACRYLIC ACID OLIGOMERS
    Publication number: 20180265447
    Abstract: A process for the synthesis of acrylic acid oligomer represented by formula (I): in which n is an integer ranging from 1 to 10, wherein the process comprises the step of heating acrylic acid at a temperature from 50° C. to 200° C. in the presence of a catalyst, water and at least one polymerization inhibitor. Formula (I) where n=0 is acrylic acid, the precursor for preparing the acrylic acid oligomer.
    Type: Application
    Filed: September 7, 2016
    Publication date: September 20, 2018
    Applicant: Arkema France
    Inventors: Reinhard Linemann, Benoit Riflade, Serge Tretjak, Andre Levray, Patrice Defer