Thermo-oxidative aging-resistant low-precipitation MCA flame-retardant PA66 composite material and application thereof

Abstract

The invention discloses a thermo-oxidative aging-resistant low-precipitation MCA flame-retardant PA66 composite material and application of the thermo-oxidative aging-resistant low-precipitation MCA flame-retardant PA66 composite material. The composite material comprises the following components in parts by weight: 85-91 parts of PA66 resin, 8-12 parts of an MCA flame retardant, 0.6-1.0 part of hollow glass beads, 0.3-0.6 part of an antioxidant, 0.2-0.3 part of a flame retardant stabilizer and 0.3-0.6 part of zinc borate. According to the invention, PA66 is used as a resin matrix, a common MCA flame retardant in the market is adopted, and the hollow glass beads, anhydrous zinc borate and stearate are combined as flame retardant stabilizers, so that the composite material reaches the UL94V0 grade and is less separated out, and the printing effect of a final product is effectively improved; by adding an efficient compound antioxidant system, the performance retention rate of the material in a high-temperature environment is improved, and the material is widely applied to the fields of electronic appliances and connectors, especially the field of wiring terminals.

Description

technical field [0001] The invention belongs to the technical field of polyamide 66 resin modification, and in particular relates to a heat-resistant oxygen-aging low-precipitation MCA flame-retardant PA66 composite material and an application thereof. Background technique [0002] Polyamide 66 (PA66) resin has excellent mechanical and physical properties, and is widely used in machinery manufacturing, electric tools, electronic appliances, transportation and other fields. However, because PA66 resin can only reach the V-2 flame retardant grade, and the molten droplets during the combustion process are likely to cause secondary ignition and cause a larger fire, which greatly limits its application fields, especially in industrial / automotive electronic appliances In the field, these products are in direct or indirect contact with the electricity environment, and leakage, short circuit, arc, etc. in the circuit are likely to cause fire. Therefore, in practical applications, m...

AI Technical Summary

Problems solved by technology

However, due to the effect of temperature and humidity, the added small molecule carboxylic acid has a large tendency to precipitate and is easy to precipitate during the placement process, causing appearance defects of the product or affecting subsequent processing (such as silk screen printing)

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