Polycarbonate composition with high ball pressure temperature and solvent resistance, and preparation method thereof

Abstract

The invention discloses a polycarbonate composition with a high ball pressure temperature and a solvent resistance, and a preparation method thereof. The composition comprises, by weight, 50-65 partsof a polycarbonate, 25-40 parts of a polyester resin, 6-10 parts of a compatilizer, 0.1-0.3 part of a charring agent, 0.01-2.0 parts of an antioxidant and 0.2-0.8 part of other assistants. The specific polyester resin is used in cooperation with the polycarbonate to greatly improve the solvent resistance of the polycarbonate resin, and the composition obtained after reasonable control of the use amount can still pass a 125 DEG C ball pressure test; the addition of the specific compatilizer greatly improves the toughness of the composition; and the special charring agent is used, so that the glowing filament temperature of the composition is increased without influencing other properties such as toughness and ball pressure, thereby the composition can pass a 850 DEG C glowing filament combustibility test. The polycarbonate composition is particularly suitable for the field of industrial switches or electronic appliances which need to be in contact with strong-polarity chemical reagents,solvents and the like.

Description

technical field [0001] The invention relates to a polycarbonate composition and a preparation method thereof, in particular to a polycarbonate composition with high ball pressure temperature and solvent resistance and a preparation method thereof, belonging to the technical field of composite polymer materials. Background technique [0002] Polycarbonate (PC) is a general-purpose engineering plastic, which has the advantages of high transparency, good impact resistance, heat resistance, dimensional stability, etc., and because of its excellent characteristics, it is widely used in industry Used as materials in the automotive field, office equipment fields such as printers, and electrical and electronic fields such as mobile phones. In addition, polycarbonate also takes advantage of its high heat resistance to become a mainstream material in the fields of wall switches and controller casings. However, when the polycarbonate material is applied to switches in the kitchen or c...

AI Technical Summary

Problems solved by technology

However, when the polycarbonate material is applied to switches in the kitchen or controllers that are more in contact with lubricating oil, there may be a risk of cracks or even breakage on the surface of the workpiece, because the polycarbonate molecular chains are forced to align and remain. The stress is high, and it is easy to be induced after contact with oil or organic solvents, and finally cracks, which affects the user experience and even causes major personal and property losses

In order to solve the above technical problems, a kind of oil fume resistant polycarbonate material has been developed in the prior art, which is to add modified nitrile rubber to the polycarbonate, so that the oil cracking resistance is significantly improved, making it suitable for oil fume Larger kitchen environment, but the addition of nitrile rubber only prolongs the cracking time to varying degrees, and cannot fundamentally eliminate the cracking phenomenon. In addition, the addition of a large amount of rubber is not conducive to the coloring of materials, especially in the field of switch panels dominated by white. extremely restrictive

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