Improved glass fiber reinforced PC/ASA composition

Abstract

The invention relates to an improved glass fiber reinforced PC / ASA (Poly Carbonate / Acrylonitrile Styrene Acrylate) composition, which is characterized by comprising the following components in parts by weight: 60 parts of polycarbonate (PC), 30 parts of alkali-free short glass fibers, 5 parts of acrylonitrile-styrene-acrylate (ASA), 1-20 parts of flexibilizer, 1-10 parts of fire retardant and 1-10 parts of flowable agent, wherein the flexibilizer is at least one selected from ethylene-octylene copolymer, ethylene-butene copolymer, ethylene-propylene copolymer and styrene-butadiene copolymer; the fire retardant is at least one selected from triphenyl phosphate, tricresyl phosphate and bisphenol A diphenyl biphosphate; the flowable agent is at least one selected from ethylene bis stearamide (EBS), pentaerythritol stearate (PETS), PE (Poly Ethylene) wax and PP (Poly Propylene) wax. Compared with the prior art, the compositional formulation of the improved glass fiber reinforced PC / ASA composition is simple and requirements for the properties of the product raw materials are low; as a result, the produced composition is easy to control in quality, and simultaneously enhanced in performance indexes such as bending strength, bending modulus and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a glass fiber reinforced PC composite material. Background technique [0002] Polycarbonate (PC) is a common engineering plastic, and it is easy to produce appearance defects such as floating fibers, flow lines and water splashes on the surface of finished products mixed with glass fibers. This is related to the inherent characteristics of polycarbonate, that is, the structure determines the performance. Large foreign companies have mature formulas and production processes. The 500R, 3412R, and 3413R of Saudi Arabia’s SABIC are more common in the market, and the GP413G, GP4230G, and GP4330G of South Korea’s Samsung are widely used in household appliances and auto parts. [0003] These grades of PC glass fiber products have evenly dispersed glass fibers on the surface, while the surface glass fibers of PC glass fiber products from domestic modified manufacturers are une...

AI Technical Summary

Problems solved by technology

Samsung uses specially customized short glass fibers and a special production process, so the cost of raw materials is particularly high

[0022] The problem with the glass fiber reinforced PC composition disclosed in ZL201010227882.7 is that it is necessary to use medium and low viscosity polycarbonate. The cost of carbonate is relatively high. Generally, the price of low-viscosity polycarbonate is more than double the price of high-viscosity polycarbonate. Obviously, this has caused an increase in cost. At the same time, the glass fiber reinforced PC combination disclosed in ZL201010227882.7 Compounds are extremely sensitive to the viscosity of polycarbonate, and the compounding scheme of the glass fiber reinforced PC composition disclosed in ZL201010227882. Process control of the process becomes extremely complex

In addition, with the development of smart phones in recent years, especially the development of high-end smart phones, some major changes have quietly taken place in the application structure paradigm of mobile phone cases. The biggest change is that most of the current high-end smart phone cases use The screw pile pre-embedded structure is abandoned, and the practice of inserting the structure between the shells and directly opening screw holes on the shell is given up. At least it can be said that the screw pile pre-embedded structure and the supplementary embedded structure have become the mainstream. Structural form, in this case, the glass fiber reinforced PC composition disclosed in ZL201010227882.7, which is mainly used as a mobile phone casing material, seems to be too much in some performance indicators, such as the impact strength index is obviously in the The requirements for the structural form dominated by screw pile pre-embedded structures are not high. In addition, in industrial applications, the stress state of structural parts is mostly static force. In this stress state, it is obviously necessary for The more important performance indicators for materials are performance indicators that affect deformation such as bending strength and bending modulus. The performance surplus is essentially an unreasonable phenomenon and a waste. Moreover, the glass fiber disclosed in ZL201010227882.7 The flame retardant effect of reinforced PC composition is extremely bad, which limits its application range

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