Red phosphorus flame-retardant reinforced nylon composite material and application thereof

Abstract

The invention discloses a red phosphorus flame-retardant reinforced nylon composite material and application thereof. The red phosphorus flame-retardant reinforced nylon composite material comprises the following components by weight: 35-55 parts of nylon resin, 3-20 parts of thermoplastic polyester, 5-20 parts of a red phosphorus flame retardant, and 10-45 parts of a reinforcing filler, wherein the thermoplastic polyester is selected from one or a combination of two of polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). A certain amount of thermoplastic polyester is added into a red phosphorus flame-retardant reinforced nylon composite material system, so that the release amount of PH3 gas in the thermal forming processing process of the composite material, especially under the condition of relatively high thermal forming processing temperature, can be effectively reduced, the harm to the body health of personnel is reduced, and the use safety of the material is improved; and the composite material is suitable for the fields of connectors, socket connectors, circuit breakers, low-voltage switches and the like in electronic and electrical appliances.

Description

technical field [0001] The invention relates to the technical field of modification of engineering plastics, and more specifically, relates to a red phosphorus flame-retardant reinforced nylon composite material. Background technique [0002] Red phosphorus flame retardant is a general-purpose halogen-free flame retardant. It not only has high flame retardant efficiency, less addition amount, low price, and has little effect on the physical and electrical properties of the resin matrix, but also produces less smoke when burning. The halogenated flame retardant is small, and the flame retardant will not migrate to the surface. It is widely used in compounding with nylon resin. The flame-retardant reinforced nylon material prepared by it has good flame-retardant properties and superior mechanical and electrical properties. Widely used in the field of electronic appliances. [0003] But the fly in the ointment is that the red phosphorus flame retardant reinforced nylon materia...

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Problems solved by technology

[0004] In order to reduce the release of PH3 in red phosphorus flame-retardant reinforced nylon materials, US Patent No. 6,645,625 discloses a method for improving the precipitation of red phosphorus , which uses silver and tin oxide, which can greatly reduce the release of PH3, but the use of metals and metal oxides will greatly reduce the electrical properties of nylon materials, especially in humid environments. performance

Chinese patent CN104059358A discloses a flame-retardant thermoplastic polyamide composition, which uses nigrosine as an adsorbent to reduce the amount of PH3 gas released during the injection molding process, but this physical adsorption is not durable; in addition , Nigrosine is a kind of black organic dye, which can only be used to prepare black materials. In terms of color, it greatly limits the application of red phosphorus flame retardant materials.

Chinese patent CN112608595A discloses a red phosphorus flame-retardant polyamide composition, which uses polyamide 66 and long carbon chain polyamide compound, and adds hyperbranched resin and solvent black chromium complex to reduce pH3 release amount, but the addition of long carbon chain polyamide will lead to a decrease in the flame retardant performance of red phosphorus flame retardant PA66, and the solvent black chromium complex can only be used to prepare black materials, and the overall cost is relatively high

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