A kind of universal black masterbatch and preparation method thereof

Abstract

The invention discloses universal black masterbatch and a preparation method thereof. The black masterbatch comprises the following components in percentage by weight: 40 to 50 percent of carbon black, 46 to 56 percent of linear low-density polyethylene power, 1 to 3 percent of vinyl distearamide and 1 to 3 percent of zinc stearate, wherein the average primary particle size of the carbon black is19 to 23 nm and the oil absorbing value is 45 to 60 mL / 100 g; the melt index of the linear low-density polyethylene power is 20 to 50 g / 10 minute. The black masterbatch is prepared according to the steps of adding the components into a heating type kneading machine, kneading at a low speed, entering a double-screw extrusion machine to perform extrusion, and cooling, drying and pelletizing to prepare the black masterbatch. The black masterbatch provided by the invention is environmentally friendly, odorless and free of wax, has high color blackness and dispersibility, has little influence on the mechanical property of various plastic products and has high universality; the preparation method is low in production cost, simple and stable in process, simple and practical to operate and particularly suitable for industrialized large-scale production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a universal black masterbatch and a preparation method thereof. Background technique [0002] Synthetic resin and plastic are indispensable and important materials in various fields of production and life. Plastic coloring is an indispensable part of plastic production. It not only adds harmonious colors to plastic products, but also makes the world around us colorful. It can also endow plastics with multiple functions, improve some application properties of plastics and endow them with new characteristics. The traditional methods of plastic coloring include dry (floating dyeing) coloring, paste colorant coloring, liquid colorant coloring, etc. Pigments are generally powdery, with poor dispersibility, difficult control of metering, poor coloring effect, and high cost. In products with a very small amount of pigment, it will cause color difference; for products with h...

AI Technical Summary

Problems solved by technology

Because of the use of low molecular wax, on the one hand, it is easy to precipitate during processing and products, which directly affects the performance of plastic products. On the other hand, the price of low molecular wax is relatively high, which increases the manufacturing cost of masterbatch

Therefore, there are many shortcomings in the universal black masterbatch made in this way: the predictability of the coloring effect is poor, the strength of the plastic product is affected, the product is easily deformed and twisted, and it is more obvious for engineering plastics; moreover, due to the high price of polyethylene wax, production The cost is high. If you want to reduce the cost, you must use low-cost recycled materials such as polyethylene wax. In the post-processing process, the smell is heavy, and it also affects the performance of plastic products.

The content of carrier resin in the patented black masterbatch is very low, while the content of inorganic particles is quite high, especially the high content of carbon black is seriously agglomerated during processing, which has a very adverse effect on the performance of modified plastics

Therefore, the "universality" of universal color masterbatches is greatly limited

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