Continental Aktiengesellschaft

Solvay Sa

Solvay & Cie (societe Anonyme)

Centre National De La Recherche Scientifique

Nv Bekaert Sa

Etat Francais Represente Par Le Delegue General Pour L'armement

Francis Garnier

Etienne Hannecart

Marc Lemaire

Robert Garreau

Jean Roncali

Philippe Lang

Richard Michalitsch

Bernd Kaiser

Denis Fichou

Andreas Topp

Johan Van Brabant

Gerhard E Nauer

Hafsa Korri

Werner Buechner

Didier Delabouglise

Gilles Horowitz

Robert J Guglielmetti

Gisele M Petillon

Yves M Poirier

A coated metal reinforcement element for polymeric or elastomeric materials comprises a coating of: a polymer or prepolymer compatible with and co-polymerizable, co-vulcanizable or crosslinkable with said polymeric or elastomeric material to be reinforced, and bearing functional groups; either covalently bonding to the metal surface of said reinforcement element; or forming covalent bonds with the outward directed first functional groups of a mono-or multimolecular layer of a bifunctional adhesion promotor intercalated between said metal by its second functional groups. A method for the coating includes a one step and a two step procedure.

Coated metal reinforcement element and coating materials

In a composite of vulcanizable rubber or rubber-like composition with one or more metal reinforcement elements embedded therein, the metal reinforcement element is coated with a polymer or non-cured rubber composition compatible with and co-polymerizable, co-vulcanizable or crosslinkable with said vulcanizable ruber composition to be reinforced, and additionally bearing functional groups either covalently bonding to the metal surface of said reinforcement element or forming covalent bonds with the outward directed first functional groups of a mono- or multimolecular layer of a bifunctional adhesion promoter intercalated between said metal and said coating and bound to said metal by its second functional groups. A cured rubber or rubber-like product, for instance a pneumatic tire, is obtained by vulcanization of such a composite.

Composite of a vulcanizable rubber composition and cured rubber product

The invention relates to an adhesive substance for improved adhesion between a vulcanizable polymer and a metallic reinforcing carrier. The use of an adhesive substance with the following structure is proposed in order to produce an improved adhesion between rubber and a metallic reinforcing carrier:

Rubber-to-metal adhesion promoter, metal reinforcement, composition made

Thin-layer field-effect transistors with MIS structure whose insulator

Substituted thiophenes of general formula: ##STR1## in which: R represents hydrogen atom or an aliphatic group containing from 1 to 4 carbon atoms,

Conducting polymers derived from fluorinated thiophenes

Electrically conductive polymers containing repeat units derived from five-membered aromatic heterocyclic monomers substituted, in the 3 position relative to the heteroatom, by an ether-type substituent linked to the heterocyclic ring by an alkylene radical containing at least two carbon atoms. The invention also relates to certain monomers enabling the above-mentioned conductive polymers to be obtained.

Conductive polymers derived from aromatic heterocyclic compounds

Substituted thiophenes of the general formula: ##STR1## in which: R represents a hydrogen atom, a halogen atom or an aliphatic group containing from 1 to 4 carbon atoms,

Substituted thiophenes, conducting polymers derived from these

The subject of the invention is mainly an electrically conductive polymer containing repeated units derived from 3-alkythiophenes in which the alkyl substituent contains from six to nine carbon atoms. The invention also relates to a process for manufacturing these polymers and to electroconductive devices containing them.

Conductive polymers derived from 3-alkylthiophenes, a process for

The invention relates to spiropyran compounds. They have the general formula (I): ##STR1## in which: X represents the CH.sub.2 group or a sulfur atom; R.sub.1 and R.sub.2 represent electron donor and/or acceptor groups selected for instance from the group NO.sub.2, COC.sub.6 H.sub.5, CN, the halogens, the acyl substituents, alkoxy substituents, the hydrogen atom, the alkyl and mercaptoalkyl groups, the ethers of the formula CH.sub.2 OR, thioethers of the formula CH.sub.2 SR and amines of the formula CH.sub.2 NR.sub.2 in which R represents an alkyl group; R.sub.3 is a linear or branched alkyl group, having 1 to 18 carbon atoms, or an arylalkyl or alkenyl group.

Spiropyran compounds of piperidine or thiazine rings

Growing community of inventors

Champigny, France

Francis Garnier