Potassium zinc PVC stabilizer and preparation method thereof

Abstract

The invention belongs to the field of the preparation of a PVC heat stabilizer, in particular to a potassium zinc PVC stabilizer and a preparation method thereof. The potassium zinc PVC stabilizer comprises the following components in percentage by mass: 10 to 20 percent of oleic acid, 15 to 30 percent of octylic acid, 18 to 44 percent of kerosene, 10 to 20 percent of zinc oxide, 8 to 15 percent of liquid potassium, 1.1 to 1.3 percent of processing aid, 0.0029 to 0.0031 percent of antifoaming agent and 0.34 to 0.46 percent of filtration auxiliary agent. The preparation method comprises the following specific steps of: adding the oleic acid, the octylic acid and the kerosene into a reaction tank in the proportion and uniformly stirring; adding the zinc oxide, the filtration auxiliary agentand the antifoaming agent into the mixture in the proportion; slowly raising the temperature to between 115 and 120 DEG C, maintaining the temperature, observing the color of the liquid in the reaction tank, and adding the liquid potassium into the mixture when the liquid is transparent; and after maintaining the temperature for 30 to 40 minutes, vacuumizing the reaction tank, adding the processing aid into the reaction tank, and uniformly stirring to obtain the potassium zinc stabilizer. The compound generated from the potassium element in the invention has good long-term heat stability; andthe generated KCl has no catalytic action on the removal of HCl and can effectively displace ZnCl generated from a zinc metal stabilizer. At the same time, the potassium zinc stabilizer has the advantages of good heat stability, easy processing, simple process, low cost, and good physical properties.

Description

technical field [0001] The invention belongs to the field of PVC heat stabilizer preparation, in particular to the preparation of a non-toxic, highly transparent and easy-to-process potassium-zinc PVC stabilizer. Background technique [0002] In recent years, the research on new PVC heat stabilizers has been paid more and more attention by technicians, among which potassium zinc PVC heat stabilizer belongs to a new type of PVC heat stabilizer that is efficient, non-toxic and pollution-free. The most widely used stabilizers are calcium-zinc composite metal soap stabilizers. This type of stabilizer has strong initial coloring, long-term stability is not ideal, and the compatibility with PVC is not good, and when the amount of calcium soap is large, it is transparent. Poor, easy to spray frost. At the same time, due to the production process, production equipment, production management, and selection of raw and auxiliary materials of various manufacturers, the requirements for...

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the traditional calcium-zinc stabilizer, such as zinc soap, which has good initial heat resistance and poor long-term heat resistance, and calcium soap, which has good long-term heat resistance and poor initial heat resistance.