Patent application number | Description | Published |
20080255399 | Method for Production of Diphenylethylene - The invention relates to a method for production of diphenylethylene (DPE) comprising the steps of: (a) catalytic dehydrogenation of diphenylethane (DPA) in the presence of water, (b) addition of a light organic solvent to the mixture from step (a) and (c) decanting the mixture from step (b) with recovery of a flow comprising diphenylethylene as a mixture with the solvent added in step (b). The invention further relates to a given mixture of DPE, DPA and solvent and use thereof in polymerisation. | 10-16-2008 |
20090088526 | COMPOSITION COMPRISING A COPOLYMER BASED ON ACRYLONITRILE AND A VINYLAROMATIC MONOMER, A COPOLYMER COMPRISING AT LEAST THREE BLOCKS AND A PARTICULATE COPOLYMER OF THE CORE-SHELL TYPE - The invention relates to an impact-resistant transparent composition comprising a copolymer having repeat units resulting from the polymerization of acrylonitrile and of at least one vinylaromatic monomer, a particulate block copolymer and a core-shell copolymer. | 04-02-2009 |
20090306246 | CROSSLINKED COMPOSITION COMPRISING A CORE/SHELL COPOLYMER, METHOD OF OBTAINING SAME AND USES THEREOF - The invention relates to is a crosslinked composition containing in parts by weight: 20 to 100 parts of at least one elastomer (I), 2 to 50 parts of at least one core/shell copolymer (II), and 0 to 100 parts of at least one thermoplastic polymer (III). The invention also relates to a method of producing one such crosslinked composition, which is characterized in that it consists in: mixing an elastomer and a core/shell copolymer optionally in the presence of: a grafted polyolefin, a plasticizer, fillers and/or additives, and a suitably-selected crosslinking system, and subsequently crosslinking said mixture at a suitable temperature. In a preferred embodiment of the invention, the mixture is crosslinked at a temperature of between 150 and 320° C. The invention method be carried out in an internal mixer, or, alternately, in a twin-screw extruder or a Buss®-type co-kneader. Depending on the case, the resulting mass is calendared or extruded, cooled and subsequently granulated. The granules thus obtained are then ready to be transformed, by means of heating, into sheets, plates, extrusions, tubes or other desired products. The invention further relates to the use of one such composition in the production of ducts, pipes, tubing, couplers or similar for conveying fluids, such as the fluid transfer conduits, pipes and other elements which are used in the automobile industry in braking, cooling, steering and air-conditioning systems. The inventive crosslinked composition can also be used in the production of belts, tires, electrical cable sheaths, and shoe soles.” | 12-10-2009 |
20100121021 | PROCESS FOR THE PREPARATION OF POLYLACTONES AND POLYLACTAMS - The present invention relates to a process for the preparation of a lactone or lactam homopolymer, comprising the stage consisting in reacting a lactone or lactam with a nonpolymeric initiator comprising at least one hydroxyl or thiol functional group in a nonchlorinated solvent in the presence of a sulfonic acid of formula R—SO | 05-13-2010 |
20100121024 | METHOD FOR PRODUCING A COPOLYMER OF AT LEAST ONE CYCLIC MONOMER - The present invention relates to a process for the preparation of a copolymer of at least one cyclic monomer chosen from a lactone, a lactam, a lactide and a glycolide, comprising the stage consisting in reacting said cyclic monomer with a polymeric initiator in the presence of a compound carrying a sulfonic acid functional group. | 05-13-2010 |
20100184926 | COMPOSITION CONTAINING A LACTIC ACID HOMOPOLYMER AND A BLOCK COPOLYMER - The present invention relates to a composition containing at least one lactic acid homopolymer and at least one block copolymer with a polydispersity index ranging from 1.5 to 5 and comprising:
| 07-22-2010 |
20110301295 | NOVEL COPOLYMERS WITH POLAR AND NON-POLAR OLEFIN BLOCKS - The present invention relates to copolymers with polar and non-polar olefin blocks with a variable polar monomer content of 0.1 mol % to 99.9 mol %. The invention also relates to a method for obtaining copolymers with olefin blocks and vinyl polar monomer blocks, said method using a single-component catalytic system made up of an organometallic complex containing a metal belonging to groups VIII to X. Said organometallic complex is advantageously active in the medium without adding cocatalyst. | 12-08-2011 |
20120108786 | ORGANIC SYSTEM FOR THE RING-OPENING POLYMERIZATION OF CYCLIC CARBONATES IN ORDER TO OBTAIN (BIO)-POLYCARBONATES - An organocatalytic system, having a sulfonic acid as catalyst, for the polymerization of carbonates, and a polymerization process employing said system to obtain bio-polycarbonates devoid of ether units inserted by decarboxylation. The catalyst system for the ring-opening polymerization reaction of cyclic carbonates is formed of an initiator and, as catalyst, of a sulfonic acid of formula R′—SO | 05-03-2012 |
20140083500 | COMPOSITION FOR AN ACTIVE LAYER OR ELECTRODE OF PHOTOVOLTAIC CELLS - A composition including a graft copolymer, having: a linear trunk including at least one non-aromatic vinyl polymer or an unsaturated polyolefin; and at least two grafts attached to said trunk via a chemical bond, each graft having a conjugated polymer, characterized in that said composition further includes: fullerenes and a conjugated polymer; or carbon and/or graphene nanotubes. Also, a photovoltaic module incorporating such a composition, and to the use of said composition for the same purposes. Finally, methods for synthesizing the molecules forming all or part of the composition. | 03-27-2014 |
20140370198 | METHOD FOR PREPARING SURFACES - The invention relates to a surface preparation method using a combination of at least two polymers, which are the same or different, which are grafted hierarchically or multiply on a surface, and also to the use of this preparation method, more particularly in applications for controlling the surface energy of a substrate. The invention may allow a block polymer to be structured with a minimum of defects. | 12-18-2014 |