Heat-conducting flame-retardant polyethylene terephthalate composite and preparation method thereof

Abstract

The invention discloses a heat-conducting flame-retardant polyethylene terephthalate composite, which comprises, by weight, 30-50 parts of polyethylene terephthalate, 20-40 parts of heat-conducting agent, 12-15 parts of flame retardant, 6-8 parts of flame retardant synergist, 5-10 parts of flexibilizer, 0.5-2 parts of coupling agent, 0.3-0.5 part of antioxidant and 0.5-1 part of processing aid. The composite made by the preparation method has excellent heat conductivity and flame retardancy and further has fine mechanical property, and is widely applicable to electronic and electrical components having high requirement for heat dissipation, and applicable range of PET (polyethylene terephthalate) in fields of electronics, electrical appliances, automobiles, home appliances and the like is widened.

Description

technical field [0001] The invention relates to a PET composite material, in particular to a thermally conductive and flame-retardant polyethylene terephthalate composite material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is the lowest price among engineering plastics and has high cost performance. PET is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface. It has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120°C. Under the same conditions, its electrical properties are still good, but its corona resistance is poor, and its creep resistance, fatigue resistance, friction resistance, and dimensional stability are all good. There are ester bonds in the PET molecular chain, which will decompose under the action of strong acid, strong alkali and water vapor. It is resistant to organic solvents and weather resistance. I...

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Problems solved by technology

Chinese patent CN 101805496 A discloses a new type of halogen-free flame-retardant reinforced polyester alloy (ETP), whose flame-retardant performance reaches the U.S. UL94 0.8mm V-0 level, with excellent mechanical properties, and can replace higher-priced halogen-free flame-retardant PBT, PC, PA and other materials have good molding effect and do not affect color matching, but their further application is limited due to the lack of improvement in thermal conductivity and heat dissipation.

Chinese patent CN 101845204A discloses a high-strength thermally conductive polyethylene terephthalate and its preparation method. The prepared PET composite material has good thermal conductivity and high strength, but due to the lack of improvement in its Flame retardant properties limit its application in the fields of electronics, automobiles, household appliances, etc.

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