High-heat-resistance flame-retardant nylon 66 composite material

Abstract

The invention provides a high-heat-resistance flame-retardant nylon 66 composite material and a preparation method thereof. The high-heat-resistance flame-retardant nylon 66 composite material comprises the following components in percentage by mass: 40-75.5% of polyamide 66 resin; 12-19% of a decabromodiphenyl ethane flame retardant; 2-8% of antimonous oxide; 4-10% of a synergistic flame retardant; 10-40% of chopped glass fibers; 0.5-3.0% of an acid acceptor; and 0.3-1.0% of a lubricant. The invention creatively provides the flame-retardant nylon 66 composite material with high processing thermal stability, the material has excellent processing thermal stability, the composite material is continuously produced under the conditions of normal extrusion processing temperature and injection molding processing temperature, and the industrial production requirements are met.

Description

technical field [0001] The invention belongs to the field of environmentally friendly brominated flame-retardant nylon, and in particular relates to a high heat-resistant flame-retardant nylon 66 composite material. Background technique [0002] Polyamide resin has excellent mechanical properties, barrier properties, heat resistance, wear resistance, chemical corrosion resistance and other comprehensive properties, and is widely used in machinery manufacturing, electric tools, electronic appliances, transportation and other fields. Decabromodiphenylethane is a highly efficient brominated flame retardant, which can be widely used in plastics, fibers, etc., especially in engineering plastics. In the early 1990s, decabromodiphenyl ether was widely used, but because the European Union pointed out that decabromodiphenyl ether would produce toxic and carcinogenic polybrominated dibenzodioxanes and polybrominated dibenzofurans when burned, And make it slowly withdraw from the mark...

AI Technical Summary

Problems solved by technology

In the early 1990s, decabromodiphenyl ether was widely used, but because the European Union pointed out that decabromodiphenyl ether would produce toxic and carcinogenic polybrominated dibenzodioxanes and polybrominated dibenzofurans when burned, slowly withdrawing from the market

However, it is rarely used in PA66 composite materials. The main reason is that the melting point of PA66 resin is as high as 260°C, and the processing temperature when preparing composite materials is higher than this temperature, such as 280°C or even higher. More acidic small molecular substances such as HBr, these acidic substances have a certain catalytic effect on the degradation of amide groups. In addition, HBr is easy to react with antimony white to form SbBr3 with strong reactivity. Both effects will affect the performance of nylon-based composite materials. The thermal stability of processing has a negative impact, limiting the application of decabromodiphenylethane flame retardant PA66 products

Images