Anti-yellowing low-mold-scale halogen-free flame-retardant polyamide composite material and preparation method thereof

Abstract

The invention relates to the technical field of flame-retardant high polymer materials, in particular to an anti-yellowing low-mold-scale halogen-free flame-retardant polyamide composite material and a preparation method thereof. The polyamide composite material comprises the following components: polyamide resin, a compound halogen-free flame retardant, a metal oxide, a polyhydroxy component and other auxiliaries, the compound halogen-free flame retardant is prepared from alkyl phosphinate, melamine polyphosphate and zinc borate; the ratio of the polyamide resin to the compound halogen-free flame retardant to the metal oxide to the polyhydroxy component in parts by weight is (40-60): (15-25): (0.2-1.5): (0.2-1.5). The anti-yellowing low-mold-scale halogen-free flame-retardant polyamide composite material provided by the invention has high flame retardant property and good mechanical property, and also has excellent anti-yellowing and low-mold-scale characteristics.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polymer materials, in particular to a halogen-free flame-retardant polyamide composite material with anti-yellowing and low mold scale and a preparation method thereof. Background technique [0002] Polyamide (nylon, PA), as an engineering plastic, is one of the five engineering plastics with the largest output, the most varieties and the most widely used. Nylon has high mechanical strength, heat resistance, abrasion resistance, oil resistance, and Weak acid, alkali resistance and general organic solvent resistance, good electrical insulation, and self-extinguishing. It is widely used in automobiles, home appliances, electronic appliances, aerospace and other industries. [0003] Traditional flame retardant nylon is usually flame retardant with brominated flame retardants, but with the continuous improvement of environmental protection requirements, and the release of the EU ROHS directiv...

AI Technical Summary

Problems solved by technology

[0007] However, these patent technologies mainly describe the high flame retardancy performance of glass fiber reinforced PA66 obtained under the compound system of OP and MPP, and do not disclose that the acidic substances decomposed during the processing of the compound flame retardant system are likely to cause the degradation of nylon. A large number of organic small molecules are deposited on the surface of the mold, resulting in the generation of mold fouling

Mold deposits are easy to block the vent holes, especially for products with high appearance. The injection speed is high and the exhaust requirements are high. Blockage of the vent holes will easily cause the end of the plastic part to burn, which will affect the appearance of the product.

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