A kind of impact modifier with excellent weather resistance and heat resistance and its preparation method and application

Abstract

The invention relates to an impact modifier with excellent weather resistance and heat resistance and a preparation method and application thereof. The impact modifier is ASA high rubber powder modified by N-substituted maleimide. The N-substituted maleimide modified ASA high rubber powder of the present invention is only composed of an acrylate rubber inner core and a styrene-acrylonitrile-N-substituted maleimide terpolymer shell. The present invention introduces 2-ethylhexyl acrylate soft elastomer in the rubber core preparation process to reduce the glass transition temperature of the rubber core, and introduces N, N-dimethylaniline as a reducing agent to improve the grafting rate of the shell layer. The introduction of N-substituted maleimide comonomers in the preparation process improves the heat resistance of the material. The preparation method of the N-substituted maleimide modified ASA high rubber powder provided by the present invention can effectively improve the impact performance, coloring performance, weather resistance and heat resistance of the product.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to an impact modifier with excellent weather resistance and heat resistance, a preparation method and application thereof. [0002] technical background [0003] ASA high rubber powder is a ternary graft copolymer composed of acrylate (A), styrene (S) and acrylonitrile (A). Due to the introduction of acrylate rubber without double bonds as the core, the rubber core is only 300nm It can be aged and degraded only under light waves, so ASA high rubber powder is a core-shell impact modifier with excellent weather resistance, and it is mainly used for blending with SAN to make ASA resin. Technically speaking, ASA resin not only maintains the main characteristics of ABS, but also combines the advantages of weather resistance of acrylic rubber, so it can be widely used in outdoor construction and other fields. [0004] ASA resin was industrialized by German BASF company ...

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of impact modifier with excellent weather resistance and heat resistance and its preparation method and application, to solve the redox system composed of organic peroxide-ferrous ion compound in the prior art Initiate graft polymerization to reduce the weather resistance of the material, solve the problem in the prior art that increases the impact resistance of the material by increasing the proportion of the rubber core, resulting in a decrease in the heat resistance and other mechanical properties of the material, and solve the problem in the prior art due to ASA The heat resistance of high rubber powder material itself is not high, which leads to the problem of low heat resistance of ASA high rubber powder

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