Elf Atochem S.a.

Other

Solvay (societe Anonyme)

Cipari S.a.

Atofina

Cosden Technology, Inc.

Societe Chimique Des Charbonnages S.a.

Norsolor

European Community

Ire-celltarg S.a.

Brussels Biotech

Recherche Et Developement Du Groupe Cockerill Sambre En Abrege: 'rd-cs'

'recherche Et Developpment Du Groupe Cockerill Sambre' En Abrege 'rd-cs'

Robert Jerome

Philippe Teyssie

Philippe Dubois

Marc Mertens

Lucien Martinot

Roger Fayt

Christophe Navarro

Thierry Senninger

Sunil K Varshney

Philippe Degee

Jean Schrijnemackers

Philippe Lecomte

Thomas Zundel

Cedric Calberg

Trazollah Ouhadi

Henri Wautier

Hans-Gerhard Fritz

Jean M Heuschen

Andreas R Maurer

Axel H E M&uuml;ller

Philippe Pirson

Jean-Bernard Falmagne

Georges Moineau

Christian Grandfils

Robert Vankan

Nicole Nihant

Etienne Goethals

Jean-Paul Masy

Marc Bourguignon

Luc Delattre

Jose Bontemps

Sven Jacobsen

Jean-Pierre Latere

Isabelle Bodart

Initiation system and process for anionic (co) polymerization of (Meth) acrylic, vinylaromatic and/or diene monomers

The invention concerns a method for forming a coating on conductive particles by grafting a polymer and/or a copolymer of the particles from a bath containing at least a monomer from which the polymer and/or copolymer is formed. The method consists of producing the grafting by electrochemical reduction of the monomer in an electrolytic solution, where at least a cathode and an anode are provided, and containing an aprotic solvent, a support electrolyte and the monomer(s) required for polymerizing or copolymerizing the coating, by suspending the particles and moving the solution so as to produce an intermittent contact between the particles and the cathode, and to form, by polymerization or copolymerization, the coating on the particles by applying an electric potential.

Method for coating electrically conductive particles by grafting a polymer layer

Unsubstituted oxepane-diones useful as monomers for the production of polymers, process for the synthesis thereof by oxidation of unsubstituted cyclohexanediones, process for the preparation of polyesterketone polymers by polymerization of cyclic esterketones and polyesterketone polymers so obtained.

Cyclic esterketone compounds, processes for the synthesis thereof and process for the preparation of poly (esterketone) polymers

A method for making composites uses electrochemical polymer or copolymer coating of a carbon-based support by using a reaction system including (a) at least a monomer capable of forming a polymer on said support, (b) an aprotic solvent and (c) an electrolyte providing the resulting organic medium with an electrical conductivity for conducting therein electrolysis. The carbon support permanently forms the cathode, by applying either a potential or an electric current bringing the reaction system into the passivation zone corresponding to the first inhibition peak. The method forms a polymer grafted on the support.

Method for making composites

The initiation system comprises (1) at least one silylated initiator and (2) at least one alkaline metal alcoholate as ligand. The silylated initiator may be monofunctional and selected in particular from among the compounds of Formula (I) or difunctional and selected in particular from among the compounds of Formula (II):

Initiation system comprising a silylated initiator for anionic (co)polymerization of (meth)acrylic monomer(s) and process using same

An aliphatic polyester and/or copolyester, obtained from a polyreaction of at least one monomer from the group comprising lactides, lactones, cyclic carbonates and cyclic anhydrides. To be able to prepare the aliphatic polyester and/or copolyester a reaction mixture is used which contains at least one catalyst of the general formula (M) (X.sub.1, X.sub.2 . . . X), M being a metal selected from the group 3 to 12 of the periodic system (X.sub.1, X.sub.2 . . . X.sub.m) being a substituent selected from one of the families of alkyls, aryls, oxides, carboxylates, halogenides, alkoxides and compounds with elements from group 15 and/or 16 of the periodic system, m being an integer in the range of from 1 to 6, and n being an integer in the range of from 0 to 6, and which also contains a co-catalyst of the general formula (Y) (R.sub.1, R.sub.2 . . . R.sub.q).sub.p, Y being an element selected from the group 15 or 16 of the periodic system. (R.sub.1, R.sub.2 . . . R.sub.q) being a substituent selected from one of the families of the alkyls, aryls, oxides, halogenides, oxyalkyls, aminoalkyls, thiolkyls, phenoxides, aminioaryls, thioaryls, and q and p corresponding to the values for m and n.

Aliphatic polyesters and/or copolyesters and a process for the

Biocompatible and biodegradable nanoparticles designed for proteinaceous

This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature which may be as low as 0.degree. C., in the presence of an initiator system comprising at least one non-peroxy radical-generator compound and at least one catalyst consisting of a metal complex represented by formula Ma.sub.a (L).sub.n in which M represents Rh, Co or Ir; A represents, a halogen or a pseudohalogen; the groups L, which may be identical or different, each represent a ligand which may be a chiral ligand, which is chosen from cyclooctadiene, PRR'R', P(OR) (OR') (OR'), NRR'R', ORR', SRR', SeRR', AsRR'R', SbRR'R', each radical R, R' and R' independently representing an optionally substituted C.sub.1 -C.sub.14 alkyl group or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined together by one or more divalent radicals; a is an integer such that 1.ltoreq.a.ltoreq.3 ; n is an integer such that 1.ltoreq.n.ltoreq.5, and in the absence of activator.

Process for the controlled radical (CO) polymerization of (Meth) acrylic

This process is characterized by the fact that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature that can be as low as 0.degree. C., in the presence of an initiation system including: at least one compound generating radicals, other than bromofluorene, and at least one catalyst consisting of a complex of palladium in the 0 oxidation state, denoted by the following formula (I): Pd(0)L.sup.1 L.sup.2 L.sup.3 L.sup.4 in which each of L.sup.1, L.sup.2, L.sup.3 and L.sup.4, which are identical or different, denotes a ligand which may be a chiral ligand, which is chosen from PRR'R', P(OR)(OR')(OR'), NRR'R', ORR', SRR', SeRR', AsRR'R', SbRR'R', where each of R, R' and R' independently denotes a C.sub.1 -C.sub.14 alkyl group, optionally substituted, or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined to one another by one or more divalent radicals.

Process for controlled radical polymerization or copolymerization of

Compositions including at least one polyamide obtained by polycondensation of meta-xylylenediamine and of a dicarboxylic acid, as well as at least one copolymer based on methyl methacrylate and on acrylic and/or methacrylic acid, the said copolymer being advantageously at least partially neutralized with an alkali metal. These compositions exhibit a high melt viscosity at low shear rate, which facilitates their processing.

Polyamide compositions exhibiting improved rheology

A film of a composite material is deposited by electropolymerization onto electrically conductive surface. A mixture comprising a monomer, a substance forming a dopant, a supporting electrolyte and a solvent is subjected to electrolysis in which the conductive surface to be coated is used as either cathode or anode. The cathode or anode is polarized to a potential between the electron transfer between the electrically conductive surface and the monomer. Prior to electrolysis, a solution is made from the mixture containing the substance forming a dopant either as anion, cation, molecule, and/or as undissociated complex.

Process of depositing by electropolymerization a film of a composite

A process for depositing by electropolymerization an organic film onto an electrically conductive surface, wherein use is made of a mixture comprising (a) at least one monomer suited for forming a polymer onto said surface, (b) at least one material which can be linked to said polymer, (c) a supporting electrolyte and (d) a solvent, said process comprising the use, as material to be linked to said polymer, of a reactive substance which can react chemically with the growing polymeric chains formed starting from the monomer.

Process for depositing by electropolymerization on organic film onto an

Prestabilizing copolymers comprising the product of the in situ reaction of a mixture of ethylenically unsatured monomers containing at least one mono-unsaturated monomer containing no groups which can be alkoxylated and one unsaturated monomer containing a group which can be alkoxylated, a prepolyol of low molecular weight and a polymerization catalyst as well as an alkoxylating agent for the abovementioned reaction product chosen from the group comprising ethylene oxide, propylene oxide and their mixtures, process for obtaining dispersions of polymers/polyols and process for obtaining polyurethane foams.

Graft prestabilizing and stabilizing copolymers and their preparation,

A process for the polymerization of acrylic monomers and optionally of vinyl comonomers using (i) an initiator of formula (I):

Process for the anionic polymerization of acrylic monomers and

The present invention relates to microparticles containing an active principle against malaria, such as primaquine, one of its amino acid derivatives, or their conjugates with a hepatotropic vector or their pharmaceutically acceptable salts, and a biocompatible and biodegradable polymer controlling the kinetics of release of the active principle, like (DL)polylactide. The invention also relates to pharmaceutical compositions comprising microcapsules according to the invention. Lastly, the invention relates to processes for the preparation of microparticles as mentioned above, the processes comprising: dissolving the polymer in a volatile solvent, adding to this solution the active principle and possibly a substance regulating the size of the microparticles, and at the end of evaporation, recovering the microparticles by centrifugation and filtration.

Microparticles comprising a biodegradable polymer controlling the

Growing community of inventors

Tilff, Belgium

Robert Jerome