Halogen-free heat-proof low-smoke and flame-retardant polyester compound and preparation method thereof

Abstract

The invention relates to a halogen-free heat-proof low-smoke and flame-retardant polyester compound and a preparation method thereof. The compound comprises polyester resin (1), a phosphate (phosphite ester) and phosphate (phosphite) composite flame retardant (2), a flexibilizer (3), an enhancement and reinforcement modifier (4), an accelerant (5) and an additive (6), which are injected into a high-speed mixer to be mixed according to a certain weight ratio and injection sequence so as to obtain a semi-finished product; and the semi-finished product is added into an equidirectional double-screw extruder through a quantifier to be extruded and pelletized to obtain the product. The polyester compound can be made into a plastic workpiece with a complicated structure, a favorable appearance and an extremely short forming period through mould pressing or injection moulding, has favorable runnability and heat resistance, as well as very low mist generation quantity, in high-speed injection-moulding forming, also has remarkable heat resistance, UV resistance and dimensional stability, reaches the 500 V comparative tracking index and can satisfy the UL94-V0 requirement under the condition that the thickness of the plastic piece is 0.5 mm-0.8 mm.

Description

technical field [0001] The invention relates to a halogen-free, heat-resistant, low-smoke, flame-retardant polyester compound and a preparation method thereof, which is especially suitable for capacitors, electrical shells, electronic connectors, and CPU fan blades. technical background [0002] In August 2004, the European Union stopped using polybrominated biphenyls and polybrominated diphenyl ethers. At the end of 2004, the Great Lakes stopped producing polybrominated biphenyls and polybrominated diphenyl ethers. The U.S. Environmental Protection Agency requires that starting from January 2005, any production and import of polybrominated biphenyls and polybrominated diphenyl ethers must be reported in advance. As a result, the application of halogen-containing flame retardants in electronic and electrical products has entered a new stage of evaluation for environmental pollution and harm to organisms. Various countries have formulated corresponding regulations to prohibi...

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Problems solved by technology

Halogen-free and phosphorus-free flame-retardant polyester has corresponding patent applications at home and abroad, and the previous products did not have good fluidity, heat resistance and low smoke generation in high-speed injection molding

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