Rhone-poulenc Chimie

Institut Francais Du Pe'trole

Ciba-geigy Corporation

Flamel Technologies

Aerospatiale Societe Nationale Industrielle

Yves Camberlin

Philippe Michaud

Jacky Grenier

Anthony Bonnet

Jean-Pierre Pascault

Serge Gonzalez

Pascal Barthelemy

Jacques Vallet

Henri Sautereau

Gerard Mignani

Remi Meyrueix

Rene Dien

Patrice Dourthe

Evelyne Chataignier

Gilles Hugues Tapolsky

Fr&eacute;d&eacute;rique Hauviller

Mohamed Taha

St&eacute;phane Poncet

Frederique Hauviller

Rene Arpin

Daniel Beziers

Daniele Beziers

The invention describes the use of compositions containing at least one thermoplastic polymer and an epoxy resin modified by at least one aromatic polyamine to coat surfaces, especially pipes through which oil is transported. The polymer compositions used contain at least one thermoplastic polymer which is preferably amorphous selected from the group formed by polysulphones, polyetherimides and polyphenylene esters and at least one epoxy resin modified by at least one aromatic polyamine containing at least two primary amine groups in its molecule. Different layers of polymers are deposited on different types of surface, more particularly as internal and external coatings for conduits. The invention also provides a surface coating comprising such compositions. Multi-layer coatings are also produced.

Use of polymer compositions for coating surfaces, and surface coatings comprising such compositions

Graft stereoblock polymers are described which contain at least one polyolefin or polydiene type sequence comprising at least one succinimide ring substituted on the nitrogen atom by a reactive group with formula &mdash;R(&mdash;X) , where &mdash;X represents a reactive group, n is a number greater than or equal to 1 and &mdash;R is a residue containing at least one carbon atom, and containing at least one sequence of a variety of natures, different from a polyolefin or polydiene. Their preparations and uses are also described. Mixtures of polymers comprising at least two polymers which are different from each other, at least one of which is a graft stereoblock polymer as defined above, and their uses, are also described.

Grafted block polymers containing at least a polyolefin or polydiene sequence comprising a succinimide cycle substituted on nitrogen

A polymer composition comprises at least one thermoplastic polymer selected from the group formed by polyetherimides and polysulphones, at least one epoxy resin modified by at least one aromatic polyamine, and at least one other thermoplastic selected from the group consisting of a polyphenylene ether, a polyphenylene sulfide and an aromatic polyether. The epoxy resin is formed from at least one polyepoxide containing at least 2 epoxy groups in its molecule and the aromatic polyamine contains at least two primary amine groups in its molecule and preferably at least one alkyl substituent containing 1 to 12 carbon atoms located alpha to one of the amino groups. The molar ratio of the polyamine to the epoxy is such that, each amino group corresponds to 1.6 to 2.6 epoxy groups. The thermoplastic polymer content is preferably about 15% to 98% by weight with respect to the total weight of the polymer composition; the amount of epoxy resin modified by at least one aromatic polyamine is about 2% to 85% by weight with respect to the total weight of the polymer composition.

Polyetherimide and/or polysulphone, aromatic polyamine-modified epoxy resin and thermoplastic

Alveolar materials that comprise at least one thermoplastic polymer that is selected from the group that is formed by polyetherimides, polysulfones and polyphenylene-ethers, at least one epoxide resin that is modified by at least one aromatic polyamine and at least one pore-forming agent or the degradation product(s) of said pore-forming agent, their syntheses and their uses.

Alveolar materials that contain at least one thermoplastic polymer, at least one modified epoxide resin and at least one pore-forming agent

A polymer contains a succinimide ring substituted on the nitrogen atom by a reactive group, where the ring is supported either by the main chain or by a side chain, the polymer resulting from reacting at least one polyolefin with at least one compound containing a maleimide ring substituted on the nitrogen atom by a reactive group with formula &mdash;R&mdash;(X) where X is a reactive group, n is a whole positive number equal to 1 or more and R is a residue containing at least one carbon atom. These polymers can be used for the production of co-extruded products, multi-layered materials, surface coatings and polymer alloys.

Polymer containing a succinimide ring substituted on the nitrogen atom by a reactive group

Use of polymer compositions for coating surfaces, and surface coating comprising such compositions

A polymer composition comprises at least one thermoplastic polymer selected from the group formed by polyetherimides and polysulphones and at least one epoxy resin modified by at least one aromatic polyamine. The epoxy resin is formed from at least one polyepoxide containing at least 2 epoxy groups in its molecule and the aromatic polyamine contains at least two primary amine groups in its molecule and preferably at least one alkyl substituent containing 1 to 12 carbon atoms located alpha to one of the amino groups. The molar ratio of the polyamine to the epoxy is such that, each amino group corresponds to 1.6 to 2.6 epoxy groups. The thermoplastic polymer content is preferably about 15% to 98% by weight with respect to the total weight of the polymer composition; the amount of epoxy resin modified by at least one aromatic polyamine is about 2% to 85% by weight with respect to the total weight of the polymer composition. These polymer compositions can be prepared in the molten state, without a solvent, at a temperature of about 100&deg; C. to 250&deg; C.

Polyetherimide or polysulphone with polyepoxide partially reacted with aromatic polyamine

A polymer contains a succinimide ring substituted on the nitrogen atom by a reactive group, where the ring is supported either by the main chain or by a side chain, resulting from reacting at least one polyolefin with at least one compound containing a maleimide ring substituted on the nitrogen atom by a reactive group with formula --R--(X).sub.n where X is a reactive group, n is a whole positive number equal to 1 or more and R is a residue containing at least one carbon atom, and with at least one polyepoxide containing at least two epoxy groups in its molecule. These polymers can be used for the production of co-extruded products, multi-layered materials, surface coatings and polymer alloys.

Grafted polyolefins containing a succinimide ring substituted on the

A thermoplastic polymer composition contains at least two distinct polymers, characterized in that it comprises at least one polymer P1 containing at least one reactive function and at least one modified polyolefin P2 containing at least one succinimide ring substituted on the nitrogen by a reactive group, the ring being carried either by the main chain or by a side chain, and optionally at least one third polymer P3 selected from the group formed by polymers and copolymers obtained by polymerisation of one or more olefinic compounds. A mixture of polymers comprises at least one composition as defined above and at least one other polymer P5 which is identical to or different from polymer P3 and optionally at least one other polymer P6 which is identical to or different from polymer P1.

Thermoplastic polymer mixture with improved mechanical properties

Process for the hardening, curing or setting of a bis-maleimide resin and a composite material using said resin. The setting process according to the invention of a basic resin A having at least one bis-maleimide monomer consists of adding to the basic resin A, prior to the use thereof, at least one reactive diluent B consisting of a monomer having a copolymerizable vinyl termination with the basic resin A when subjecting the mixture of the basic resin A and the diluent B to the action of ionizing radiation (34), the total quantity of the diluent B being such that the maleimide functions of the basic resin A are consumed following the ionizing radiation action and being chosen in the range 10 to 50 parts by weight for 100 parts by weight of the basic resin A. This resin is more particularly intended for the production of a composite material (16, 18) having a fibrous reinforcement (26, 28, 30, 32) by filamentary winding.

Process for the hardening under ionizing radiation of a bis-maleimide

Impregnating solutions based on at least one reactive thermoplastic poly

Nonlinearly optically active monomer species comprising at least two carbon-carbon activated double bonds, i.e., the polymerization of which is facilitated by the presence of an electron attracting function, and a non-centrosymmetric system of pi (.pi.) conjugated bonds bearing at least one electron attracting group on one terminal thereof and at least one electron donor group on the other terminal, are readily (co)polymerized and optionally oriented and crosslinked into shaped articles well adopted for the manufacture of a variety of electrooptical devices; such monomer species can have, for example, the following structural formula (I): ##STR1##

Optionally oriented, monomeric and polymeric nonlinearly optically

Prepolymers having imide groups

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Caluire, France

Yves Camberlin