Light scattering thermoplastic polyester composition

Abstract

The invention provides a light scattering thermoplastic polyester resin composition. The thermoplastic resin composition comprises: (A) a transparent matrix material which is selected from polymethyl methacrylate resin and copolymers thereof, such as polymethyl methacrylate, methyl methacrylate-styrene copolymer, methyl methacrylate and methyl acrylate copolymer; and (B) a scattering body material such as polyethylene glycol terephthalate resin. Relative to 100 parts by weight of the matrix material, 1 to 50 parts by weight of polyethylene glycol terephthalate are used, and an average particle size is preferably selected at 0.03 to 20 micrometers. A light scattering plate (membrane and sheet) prepared by using the thermoplastic polyester resin composition can meet the requirements of good light transmittance and high fog scale and is applicable to the fields such as lampshades, skylights, advertising lamp boxes, signage, liquid crystal displays, and the like.

Description

technical field [0001] The invention relates to a light-scattering polyester resin composition, which can meet the requirements of high light transmittance and high haze, and is suitable for the fields of lampshades, skylights, advertising light boxes, indicator signs, liquid crystal displays, and the like. Background technique [0002] With the energy crisis and environmental pollution becoming more and more serious, the theme of energy saving and low carbon has gradually penetrated into every aspect of people's life. At present, solid-state light sources are gradually replacing traditional fluorescent lamps, tungsten lamps, energy-saving lamps and other light sources due to their higher photoelectric conversion efficiency and environmental friendliness. The main component of solid-state light source is light-emitting diode (referred to as LED). LED lights are widely welcomed due to their advantages such as low working voltage, low power consumption, rich colors, long life ...

AI Technical Summary

Problems solved by technology

[0009] However, when inorganic particles are used as light-scattering particles, they have the following weaknesses: ① While increasing the haze of the material, the light transmittance will be greatly reduced

②Poor compatibility with matrix material, difficult to evenly disperse in matrix material

③A larger amount of inorganic particles will lead to deterioration of the mechanical properties of the material

④Inorganic particles have high hardness, which will cause certain wear and tear on the equipment

⑤ Some inorganic particles have a strong absorption of light in a certain band, which is not conducive to scattering, and some particles are sensitive to heat, oxygen and ultraviolet light, which is not conducive to the stability of light scattering performance

However, the preparation cost of conventional organic scatterer particles is relatively high, and like inorganic particles, it increases the haze of the material while reducing the light transmittance. At the same time, it cannot be deformed during the molding process, and the obtained isotropic light scattering material, which wastes energy to a certain extent and limits its application

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