High-weather-resistance high-environmental-friendliness flame-retardant polycarbonate alloy material based on transesterification control, and preparation method thereof

Abstract

The invention relates to a high-weather-resistance high-environmental-friendliness flame-retardant polycarbonate alloy material based on transesterification control, and a preparation method thereof.The polycarbonate alloy material is composed of the following specific raw materials by weight: 40-70 parts of virgin PC resin, 5-20 parts of virgin PBT resin, 5-30 parts of regenerated PET resin, 5-15 parts of an organic phosphorus flame retardant, 3-10 parts of a multi-block copolymer type toughening agent, 1-8 parts of a transesterification control agent and 1-8 parts of a weatherability stabilizing agent. According to the invention, the recycled PET resin and the halogen-free phosphorus flame retardant in a certain ratio are introduced, so the double environmental protection effects of recycling of a base material and non-halogenation of the flame retardant are realized; directed at the performance deficiencies that the regenerated PET resin is easy to degreed after crushing and processing a plurality of times and that a phosphide flame retardant is not resistant to damp heat, a high-efficiency transesterification control agent is introduced and cooperatively used with the weatherability stabilizing agent; and the obtained polycarbonate alloy material not only has good impact resistance and flame-retardant self-extinguishing performance, but also has greatly improved performance indexes like long-term resistance to humidity and heat and anti-UV stability in outdoor complex environments.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a flame-retardant polycarbonate alloy material with high weather resistance and high environmental protection based on transesterification control and a preparation method thereof. Background technique [0002] Polymer materials are a new class of materials that have gradually emerged with the development of the modern chemical industry. Due to their many types of monomer components, convenient synthesis, and low cost, they have developed extremely rapidly in recent decades. At present, there are nearly a hundred kinds of mass-produced polymers with different monomers and different characteristics, and the types and total output are still increasing year by year. The problem of plastic waste is also becoming more and more serious. The state of environmental protection poses a huge challenge. Therefore, how to better recycle and reuse plastic waste has become...

AI Technical Summary

Problems solved by technology

However, a prominent problem of the above-mentioned system is that there is an unavoidable transesterification reaction between PC and PBT / PET, coupled with the inherent performance defects of recycled PET resin, the resulting PC alloy material can be used in some special environments such as long-period light Under the influence of comprehensive factors such as heat, moisture, etc., the transesterification reaction is often difficult to effectively control, resulting in a significant decrease in the mechanical properties and other key performance indicators of the alloy material.

There are few reports on the above-mentioned stability in the current existing similar studies. A high-performance PC / PBT alloy material reported by CN105504753A focuses on the improvement of mechanical properties and heat resistance under normal conditions, and the long-term The stability is also limited to the evaluation of anti-ultraviolet performance; CN102604352A describes a method for the application and development of recycled PET materials, and obtains a flame-retardant polycarbonate alloy material system with excellent mechanical properties and flame-retardant properties, but does not involve Evaluation test for long-term weather resistance of materials

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