Extinction anti-ultraviolet high-performance PET (polyethylene terephthalate) master batches and preparation method thereof

Abstract

The invention relates to extinction anti-ultraviolet high-performance PET (polyethylene terephthalate) master batches and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing PET slices and organic/inorganic composite hollow porous micro-spheres with core-shell structures, performing melt extrusion and granulation, and performing drying treatment toobtain the extinction anti-ultraviolet high-performance PET master batches. The organic/inorganic composite hollow porous micro-spheres with core-shell structures, mainly composed of crosslinked spheres, titanium dioxide nano-particles and organic ultraviolet absorbents, are uniformly dispersed in the finally prepared products; the crosslinked spheres have hollow interiors and porous surfaces andhave structures formed by mutually crosslinking copolymer molecular chains containing styrene and difunctional dimethacrylate type monomer structure units; the titanium dioxide nano-particles are coated with the crosslinked spheres and are connected with the crosslinked spheres through covalent bonds; and the organic ultraviolet absorbents are doped in crosslinked structures and/or attached to theinner walls of the crosslinked spheres. The product provided by the invention has good extinction and ultraviolet shielding effects and has a wide application range; and the method provided by the invention is simple and convenient in technology and reasonable in process.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a high-performance PET masterbatch with extinction and ultraviolet resistance and a preparation method thereof. Background technique [0002] Masterbatch, also known as masterbatch, is a plastic processing aid. In the plastic processing and molding process, for the convenience of operation, the required various additives, fillers and a small amount of carrier resin are mixed and kneaded first, and then measured, mixed, melted, extruded, and pelletized by extruders and other equipment The granules produced by other processing processes are called masterbatches. Masterbatch is composed of carrier resin, various fillers and various additives. The limit of additives or the content of filler in masterbatch is several times to ten times higher than the actual demand in plastic products. During the molding process, the ratio of the masterbatch to the matrix resin m...

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Problems solved by technology

Compared with other methods of preparing polymer particles such as precipitation method, reverse suspension cross-linking method, spray drying method, etc., the preparation of microspheres by electrostatic spraying has simple process, strong controllability, environmental protection and no need to use a large amount of emulsifier. The electrostatic spray method is easy to prepare monodisperse particles and the final particles can have a variety of shapes, such as hollow and porous, such as existing literature (Zhan Naiqian. Preparation of polystyrene functional materials by electrospinning[D]. Jilin University, 2010.) reported that polystyrene solution can prepare porous hollow microspheres by electrostatic spray molding, and the prepared polystyrene (PS) hollow microspheres are chemically stable at room temperature and have good processability. However, since the glass transition temperature of polystyrene (PS) is only 100°C, the three-dimensional structure will be destroyed under high temperature conditions, so it cannot be applied to melt processing.

This greatly affects the application of PS hollow microspheres

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