Ultralow-glossiness ultralow-temperature-resistant ASA resin composition and preparation method thereof

Abstract

The invention provides an ultralow-glossiness ultralow-temperature-resistant ASA resin composition and a preparation method thereof. The composition comprises, by weight, 20-60 parts of acrylonitrile-styrene-acrylate (ASA) grafted copolymer, 40-80% of acrylonitrile-styrene copolymer, 1-20% of ultralow-glossiness low-temperature-resistant modifier and 0.1-5 parts of processing aid, and the ultralow-glossiness low-temperature-resistant modifier comprises carrier polymer, fluorine-containing copolymer, low-temperature toughener, coupling agent, fumed silica and aids. The ASA resin composition prepared by the method has ultralow glossiness, and a try can be given to replace die treating processes like mark stretching and texturing, so that die cost and manufacturing cost are saved greatly; the composition has excellent low-temperature resistance and can be well applied in some occasions having requirements on low-temperature resistance and low glossiness, like auto parts, outdoor sections, building materials and electrical appliances.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an ultra-low gloss and ultra-low temperature resistant ASA resin composition and a preparation method thereof. Background technique [0002] Acrylonitrile-styrene-acrylate graft copolymer (ASA) is a weather-resistant engineering plastic, which is similar in structure to acrylonitrile-butadiene-styrene graft copolymer (ABS), and retains ABS as Excellent mechanical and physical properties of engineering plastics. The commonly used ASA resin replaces butadiene rubber by introducing butyl acrylate rubber containing double bonds, so that only light with a wavelength of less than 300nm will have an aging effect on it, so the weather resistance has been substantially improved, compared with ABS It is about 10 times higher, and is widely used in building materials, automotive exterior parts, electronic and electrical engineering exterior parts, outdoor products, sports equipment and oth...

AI Technical Summary

Problems solved by technology

Patent WO 2003 / 027181 A2 discloses a method for preparing low-gloss ASA. The resin shown is prepared by adding a matting agent containing epoxy functional groups and amine functional groups in the molecular chain to the formula. The amount of matting agent added At 0.5-15%, preferably 3-12%, more preferably 5-10%, the glossiness of the ASA resin is mainly reduced by the reaction crosslinking of the epoxy functional group and the amine functional group; although the glossiness of the resin prepared by this method is obviously reduced , however, mechanical properties such as impact strength, tensile strength, flexural strength, and flexural modulus are also reduced in varying degrees

Patent CN102617973 adopts the above-mentioned scheme to achieve the purpose of increasing the melt strength of ABS resin by realizing cross-linking; but its reaction efficiency is often relatively low, and the cross-linking reaction often makes the melt strip at the die of the extruder appear obvious Melt swelling phenomenon, which makes subsequent pelletizing and dispersion in resin difficult

[0013] However, the above method of reducing the surface gloss of the material will often further reduce the room temperature and low temperature impact properties of the ASA resin, resulting in a further decline in the toughness of the material, which directly affects the normal use of the product.

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