COMPOSITIONS AUTO-ADHERENTES A RESISTANCE AU CHEMINEMENT AMELIOREE UTILISABLES POUR LE REVETEMENT DE SUBSTRATS METALLIQUES

• Main Authors: JUHUE DIDIER, WERTH MICHAEL, JULIEN OLIVIER, DOUAIS PATRICK
• Format: Patent
• Language: French
• Published: 30.01.1998
• Edition: 6
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

L'invention concerne une composition auto-adhérente en poudre à résistance au cheminement améliorée à base de résines thermoplastiques et/ou thermodurcissables et de carbonate de calcium aciculaire.Elle est appliquée sous forme de poudre sur le substrat métallique, puis par fusion de la poudre, on obtient un revêtement résistant au cheminement. An auto-adhesive composition for coating metal substrate based on thermoplastic and/or thermosetting resins comprises at least one uncoated calcium carbonate precipitate, in powder form, with specific surface area of 7-12 m g<-1> and specific apparent mass in suspension of 130-180, preferably 150 gl<-1>. Also claimed are (1) preparation of the composition by mixing in molten state then crushing and/or mixing different constituents in dry state; (2) use of calcium carbonate precipitate as tread-resistance additive; and (3) a material comprising a metallic substrate with coating of above composition produced by melting components. Preferably the composition is based on polyamide, preferably polyamide PA-11 and/or PA-12; and it also contains additives such as fillers, pigments and antioxidants.