Composite reinforced PBT material and preparation method thereof

Abstract

The invention discloses a composite and reinforced PBT (polybutylece terephthalate) material and a preparation method thereof. The material comprises the following components in percentage by weight: 40-65 percent of PBT resin, 6-9 percent of compound modifier, 1-3 percent of siloxane flame retardant, 1-3 percent of sulfonates flame retardant, 20-45 percent of inorganic filler with high aspect ratio, 0.4-1.6 percent of antioxidant, 0.4-0.6 processing agent and 1-4 percent of coupling agent. The material provide by the invention has not only excellent flame retardant property, but also the advantages of good environmental protection characteristic, good mechanical property, high dimensional stability, high gloss and the like, and can be widely used in products of electric products, coil frameworks, electrical connectors, automobile parts and the like so as to enable the PBT resin to have broad application prospect.

Description

technical field [0001] The invention relates to a composite reinforced material, in particular to a composite reinforced PBT material and a preparation method thereof, which can be widely used in the fields of electronic appliances, coil frames, electrical connectors, auto parts and the like. Background technique [0002] Polybutylene terephthalate, referred to as PBT, is polymerized by polycondensation of terephthalic acid and butanediol. Its melting point is 225°C to 235°C. It is milky white translucent to opaque, crystalline thermoplastic Polyester has the advantages of high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, etc. It is widely used in electronic appliances, coil bobbins, electrical connectors, auto parts and other fields, but it still has low notched impact strength , high molding shrinkage, easy to burn, long molding cycle and other defects limit its application range. For this reason, extensive modification resear...

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Problems solved by technology

[0002] Polybutylene terephthalate, referred to as PBT, is polymerized by polycondensation of terephthalic acid and butanediol. Its melting point is 225°C to 235°C. It is milky white translucent to opaque, crystalline thermoplastic Polyester has the advantages of high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, etc. It is widely used in electronic appliances, coil bobbins, electrical connectors, auto parts and other fields, but it still has low notched impact strength , high molding shrinkage, easy to burn, long molding cycle and other defects limit its application range. For this reason, extensive modification research has been carried out on PBT at home and abroad, mainly toughening, strengthening, flame retardant and blending modification. However, the flame retardants currently used to prepare flame-retardant PBT are mainly phosphorus-based and halogen-based flame retardants. These flame retardants will not only significantly reduce the physical and mechanical properties and processing fluidity of the material, but also have an impact on the environment. Therefore, there is an urgent need for a composite reinforced PBT material that not only has excellent flame retardancy, but also has good environmental protection characteristics, mechanical properties, high dimensional stability, and high gloss.

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