JP2848865B

• Main Author: SUZUOKA AKIHIRO
• Format: Patent
• Language: English
• Published: 20.01.1999
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CONDUCTORS; ELECTRICITY; INSULATORS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

A flame-retardant resin composition comprising (A) polybutylene terephthalate, a copolymer comprising at least 60.0% by weight of butylene terephthalate units and/or a thermoplastic polyester blend comprising at least 60.0% by weight of polybutylene terephthalate, (B) 2.0 to 25.0% by weight, based on the total composition, of a brominated epoxy resin type flame retardant and/or a brominated polycarbonate type flame retardant, (C) 2.0 to 15.0% by weight, based on the total composition, of a flame retardant assistant composed mainly of antimony trioxide and/or antimony pentoxide, (D) 0.01 to 10.0% by weight, based on the total composition, of a hydrous basic carbonate compound of magnesium and aluminum, and (E) 0 to 70.0% by weight, based on the total composition, of an inorganic filler. This resin composition has an excellent flame retardancy, balanced performances, and an improved molding processability (flowability, molding cycle, mold-staining resistance and the like), and a staining of metals or a formation of decomposition products and volatile substances is controlled when the composition is used for molding electrical parts.