Abstract: A method for the additive manufacturing of an elastomer part, includes—the creation of a model of spatial coordinates of the part; followed by—the corresponding deposition of an elastomer material. The deposition is carried out in a plurality of substantially flat layers which are vertically stacked. The elastomer material is deposited in the form of a latex-based liquid composition having a dispersion of polymers in an aqueous base, and the deposition is carried out by formation and pressurized ejection of drops of a liquid composition.
Type:
Grant
Filed:
March 29, 2019
Date of Patent:
January 17, 2023
Assignee:
ASSOCIATION POUR LES TRANSFERTS DE TECHNOLOGIES DU MANS
Inventors:
Cécile Leroux, Alexandre Lerat, Michel Dorget
Abstract: A method for the additive manufacturing of an elastomer part, includes—the creation of a model of spatial coordinates of the part; followed by—the corresponding deposition of an elastomer material. The deposition is carried out in a plurality of substantially flat layers which are vertically stacked. The elastomer material is deposited in the form of a latex-based liquid composition having a dispersion of polymers in an aqueous base, and the deposition is carried out by formation and pressurized ejection of drops of a liquid composition.
Type:
Application
Filed:
March 29, 2019
Publication date:
January 21, 2021
Applicant:
Association pour les Transferts de Technologies du Mans
Inventors:
Cécile LEROUX, Alexandre LERAT, Michel DORGET
Abstract: The invention relates to a method for extracting high-quality polyisoprene by grinding plants via rotary shearing using a device comprising at least one rotor and at least one stator, into particles of size smaller than 1 mm, or grinding at a pH higher than 3 and lower than 8. This method is implemented in aqueous phase and allows the preparation of a dispersion of polyisoprene in water having a weight average molecular weight (MW) higher than 800 000 g/mol. The polyisoprene is extracted from plants and in particular from guayule (Parthenium argentatum). It is a method that is particularly heedful of the environment.
Type:
Grant
Filed:
April 14, 2016
Date of Patent:
May 21, 2019
Assignees:
Association pour les Transferts de Technologies du Mans, Centre de cooperation internationale en recherche afronomique pour le developpement (CIRAD)
Inventors:
Ali Amor, Serge Palu, Daniel Auguste Marie Paul Pioch, Michel Dorget
Abstract: A method for rendering nonstick a mold made of composite material, including the steps of: (i) providing a mold made of a composite material including an epoxy resin; (ii) applying a fluorinated-polymer powder, having a minimum film-forming temperature of less than 300° C. and heat resistance at temperatures higher than 200° C., onto the walls of the mold so as to form a layer; and (iii) heating the resulting layer to a temperature of between 260° C. and 300° C. so as to form a continuous film, whereby a mold made of a composite material is obtained the walls of which are provided with a nonstick coating. The present disclosure also relates to the mold obtainable by said method.
Type:
Application
Filed:
February 22, 2013
Publication date:
April 9, 2015
Applicant:
Association pour les Transferts de Technologies du Mans
Abstract: The invention concerns a semipermeable chamber for encapsulation of cells producing at least a biological substance of interest, characterised in that it consists of a porous polycarbonate biocompatible film modified at the surface by generated polar sites and covered with at least a layer of hydrophilic polymer.
Type:
Grant
Filed:
January 29, 2002
Date of Patent:
June 6, 2006
Assignees:
Association pour les Transferts de Technologies du Mans, Universite Catholique de louvain, Centre Europeen d'Etude du Diabete (CEED)
Inventors:
Gilbert Legeay, Patrick Bertrand, Alain Belcourt, Laurence Kessler