A kind of high impact long glass fiber reinforced SAN composition and preparation method and application thereof

Abstract

The invention provides a high impact long glass fiber reinforced SAN composition and a preparation method and application thereof. The high impact long glass fiber reinforced SAN composition comprises the following components in parts by weight: styrene-acrylonitrile 18- 72.6 parts, 5-20 parts of toughening agent, 20-50 parts of long glass fiber, 2-10 parts of compatibilizer, 0.2-1 part of lubricant, 0.2-1 part of antioxidant; the toughening agent is acrylonitrile -Butadiene-styrene, acrylonitrile-ethylene-propylene-styrene, acrylonitrile-butyl acrylate-styrene, silicone-acrylate-acrylonitrile-styrene or a mixture of two or more. The high-impact long glass fiber reinforced SAN composition of the present invention has excellent mechanical properties, especially the normal and low-temperature notched impact properties, less modified resin particles and powder, which is easy to process and can meet the requirements of high-strength, low-temperature environments and other harsh working conditions. usage requirements.

Description

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

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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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