Red phosphorus and fire-retarding polyamide composite and preparation method thereof

Abstract

The invention discloses a red phosphorus and fire-retarding polyamide composite and a preparation method thereof. The composite comprises the following components in percentage by mass: 30 to 97 percent of polyamide, 1 to 40 percent of red phosphorus, 1 to 60 percent of filler, 0.001 to 15 percent of corrosion stabilizer, 0.001 to 15 percent of precipitation stabilizer and 0 to 50 percent of other assistant. The total mass percentage of the components is 100 percent. The fire-retarding thermoplastic composition is prepared by mixing a specific stabilizer and other components and regulating the ratio of the components. The prepared fire-retarding thermoplastic composition can greatly reduce precipitation amount of phosphorus and improve stability, and therefore can ensure a material has high fire-retarding performance and mechanical strength. Formed products with small wall thickness are divided into a V-0 class and a V-1 class according to Underwriters Laboratories (UL)94 standards, and the phosphorus precipitation stability is improved. The fire-retarding thermoplastic composition may be sheets, plates or formed products, and is particularly applicable to electrical appliances and electronic parts. Concretely, the fire-retarding thermoplastic composition can be used to make lamps, such as lamp holders and plugs, connecting vessels, coil holders, capacitor cases or connectors, circuit breakers, relay shells and reflectors.

Description

technical field [0001] The invention provides a stable red phosphorus flame-retardant polyamide compound. It is used in the field of electronic appliances that require high flame retardant performance and good electrical insulation performance (CTI). Background technique [0002] With the rapid development of the electronic and electrical industry, the demand for flame-retardant engineering plastics with high electrical insulation performance such as machine tool electrical appliances, automotive electrical appliances and household appliances is increasing day by day. For example, high-voltage electrical switches, transformer coil bobbins, high-voltage relays, exquisite thin-walled electronic and electrical components, low-voltage vacuum contactor coils, and switch benches all require thermoplastic engineering plastics with high flame retardancy and good electrical insulation (CTI). Moreover, according to the global environmental protection demand, halogen-free is imperativ...

AI Technical Summary

Problems solved by technology

But the fly in the ointment is that it is flammable during processing, and it is easy to release toxic gas phosphine at high temperature, and because of the precipitation of phosphorus, the acidic substance generated by the reaction is easy to corrode the processing equipment and metal components, which reduces the long-term use of electrical equipment. stability

[0003] Red phosphorus has high flame retardant efficiency, less dosage, and wide application. Microencapsulation overcomes the moisture absorption of red phosphorus, but in the actual processing process, the coating layer is still damaged to varying degrees due to strong shearing. This leads to a large amount of phosphorus precipitation, which in turn leads to corrosion of equipment and devices.

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