High-impact-resistance long glass fiber reinforced SAN composition as well as preparation method and application thereof

Abstract

The invention provides a high-impact-resistance long-glass-fiber-reinforced SAN composition and a preparation method and application thereof, and the high-impact-resistance long-glass-fiber-reinforcedSAN composition comprises the following components in parts by weight: 18-72.6 parts of styrene-acrylonitrile, 5-20 parts of a flexibilizer, 20-50 parts of long glass fiber and 2-10 parts of a compatilizer, 0.2 to 1 part of a lubricant and 0.2 to 1 part of an antioxidant; wherein the flexibilizer is one or a mixture of more than two of acrylonitrile-butadiene-styrene, acrylonitrile-ethylene.propylene-styrene, acrylonitrile-butyl acrylate-styrene and organic silicon-acrylate-acrylonitrile-styrene. The high-impact-resistance long-glass-fiber-reinforced SAN composition is excellent in product mechanical performance, especially normal-temperature and low-temperature notch impact performance, few in modified resin particle powder, convenient to process and capable of meeting the use requirements of severe working conditions such as high strength and low-temperature environment.

Description

technical field [0001] The invention belongs to the field of polymer materials and their molding processing, and in particular relates to a high-impact long glass fiber reinforced SAN composition and its preparation method and application. Background technique [0002] SAN is a styrene-acrylonitrile copolymer with high temperature resistance, excellent hardness, rigidity and dimensional stability, excellent chemical corrosion resistance, excellent stress crack resistance, and high transparency. Therefore, SAN resin is mostly used in air-conditioning components for home appliances, fan blades, washing machine water filters; battery covers, instrument panels and filters for automobiles. [0003] SAN resin is brittle, especially reinforced by glass fiber. When producing pellets, it is very easy to produce too much powder, which can easily cause the particles to crack in the radial direction, pollute the production environment, and the dust damages the occupational health of wor...

AI Technical Summary

Problems solved by technology

[0003] SAN resin is brittle, especially reinforced by glass fiber. When producing pellets, it is very easy to produce too much powder, which can easily cause the particles to crack in the radial direction, pollute the production environment, and the dust damages the occupational health of workers. It is conducive to the dispersion of glass fiber, resulting in defects such as uneven quality of injection molded parts; in addition, ordinary glass fiber reinforced SAN resin has low notched impact strength and poor fatigue performance, which cannot meet the needs of high-strength applications such as automotive fans, industrial fans, doors and windows, etc., low temperature Environmental applications are more brittle, and the strength of the parts cannot be guaranteed

[0004] The published Chinese patent CN 102827432B discloses a long glass fiber reinforced AS masterbatch and its preparation method, through thermoplastic polyurethane elastomer plastic toughening, the production of long glass fiber reinforced AS masterbatch with a glass fiber content of 45-55%, In this system, the content of thermoplastic polyurethane elastomer is high, the toughening effect is not obvious, and the cost is high, so it is not suitable for commercial application

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