Halogen-free flame-retardant enhanced PC/ABS alloy and preparation method thereof

Abstract

The invention relates to a halogen-free flame-retardant enhanced PC / ABS alloy and a preparation method thereof, and belongs to the technical field of high molecular materials. The alloy is composed of the following raw materials, by weight, 60-80 parts of PC, 35-50 parts of ABS, 7-13 parts of aramid fibers, 6-10 parts of magnesium hydroxide whiskers, 5-8 parts of dimethyl methylphosphonate, 4-7 parts of melamine, 3-5 parts of pentaerythritol, 5-10 parts of compatilizer and 0.5-3 parts of antioxidant. The aramid fibers and the magnesium hydroxide whiskers are adopted to enhance the PC / ABS alloy, so that a prepared product has good mechanical performance and dimensional stability and is easy to process and form. In addition, organic phosphorous-nitrogen compound flame retardant and inorganic flame retardant magnesium hydroxide whiskers are adopted for synergy in raw materials, so that the halogen-free flame-retardant enhanced PC / ABS alloy has good flame-retardant effect, and application range of the PC / ABS alloy is greatly widened.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a halogen-free flame-retardant reinforced PC / ABS alloy and a preparation method thereof. Background technique [0002] Polycarbonate, referred to as PC, is one of the five general-purpose engineering plastics. The light transmittance of polycarbonate film can be >90%, the haze is <0.2%, the thermal decomposition temperature is high, and it has excellent electrical insulation. However, polycarbonate is also There are some performance defects, such as poor wear resistance and sensitivity to notches. Although polycarbonate has certain self-extinguishing properties and releases carbon dioxide when burned, it still cannot meet the requirements of high flame retardancy, which greatly restricts its application in many fields. Co-alloying is an important means of PC modification, which not only makes up for the shortcomings of PC, but also broadens its applic...

AI Technical Summary

Problems solved by technology

[0004] In recent years, halogen-free flame retardants have been developed rapidly in PC / ABS alloys, but halogen-free flame-retardant PC / ABS alloys usually have poor rigidity

EP0640665 mentions the use of glass fiber to reinforce the halogen-free flame-retardant PC / ABS alloy, but the rigidity and toughness after reinforcement are limited; CN200610025226 adds curing epoxy resin to the halogen-free flame-retardant PC / ABS alloy to improve the rigidity of the material, but its toughness is not good