Preparation method and application of special functional auxiliary material for pelletizing PVC (Poly Vinyl Chloride)

Abstract

The invention provides a special functional auxiliary material for pelletizing PVC (Poly Vinyl Chloride). The special functional auxiliary material is prepared by using the following method comprising the steps of: firstly, mixing carbon black and a plasticizer, and grinding to ensure that the average particle size of the carbon black is smaller than 10mu m; then, adding a dispersing agent and a functional liquid carrier to prepare a black wash base stock; furthermore, adding 0.8-2.5wt% of fumed silica with the particle size of 10-40nm into black wash base stock and dispersing and grinding; and mixing to obtain the special functional auxiliary material for pelletizing PVC, wherein the dosage of the functional black wash is 1/50 to 1/20 of the total quantity of all components in a PVC pelletizing production formula. The auxiliary material is good in rheological property and improved in reinforcing property, can be easily mixed with PVC powder to be pelletized, can be dispersed quickly and uniformly without cakes; the brightnesses and the blacknesses of PVC particles obtained through processing at the later period and various products of the PVC particles are remarkably improved, and the physical and mechanical properties of the material are further improved; and in addition, by using the special functional auxiliary material, the proportioning process in PVC pelletization is more convenient, and the defects of dust fly and environment pollution are overcome.

Description

technical field [0001] The invention relates to a polymer material colorant, in particular to a special functional auxiliary material for PVC granulation containing carbon black and its preparation method and application. Background technique [0002] Colorants for polymer materials such as plastic, rubber, and thermoplastic elastomers are indispensable substances in the processing of modern polymers. They can not only beautify the appearance of products, but also have other important functions, such as easy to distinguish colors and improve the weather resistance of products. wait. In the past, when carbon black was used as a colorant, it was directly added to black powder for mixing without treatment in PVC granulation or other processes, which would easily cause particles and dullness on the surface of the product, making the product defective , Moreover, carbon black is easy to cause dust to fly during use, which not only pollutes the environment, but also causes harm t...

AI Technical Summary

Problems solved by technology

In the past, when carbon black was used as a colorant, it was directly added to black powder for mixing without treatment in PVC granulation or other processes, which would easily cause particles and dullness on the surface of the product, making the product defective , Moreover, carbon black is easy to cause dust flying during use, which not only pollutes the environment, but also causes harm to production operators

[0003] Although "functional black pulp" has been developed, its application to PVC granulation is still insufficient, and the amount of functional black pulp is relatively small, and its dispersion effect and coloring efficiency in PVC mixtures still need to be improved