Sulfur-containing zinc soap composition for chlorine-containing polymer thermostable systematic and preparation thereof

Abstract

The invention relates to a sulfur zinc-containing soap composition for a chlorine-containing polymer thermostable system, and a preparation method thereof. The sulfur zinc-containing soap composition comprises the following compositions by mass percentage occupying the total mass of the thermal stabilizer composition: 10 to 50 percent of sulfur zinc-containing soap, 10 to 60 percent of calcium soap, 10 to 50 percent of chelating agent and 1 to 10 percent of antioxidant. The sulfur zinc-containing soap is obtained by reacting sulfur zinc-containing soap with a sulfur-containing organic substance. The composition can obviously inhibit thermal degradation of chlorine-containing polymers, effectively reduce initial coloring of the chlorine-containing polymers at a processing temperature, and provide long-term color stability, has stability better than that of the prior CaSt2 / ZnSt2 composite stabilizer, has the characteristics of non-toxicity, no heavy metal pollution and so on, avoids high cost of an organic tin stabilizer and toxicity of a lead stabilizer and a cadmium stabilizer, and has certain practical value.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a sulfur-containing zinc soap composition used in a chlorine-containing polymer thermal stability system and a preparation method thereof; the composition is used to improve the thermal stability and anti-coloration of chlorine-containing polymers sex. Background technique [0002] Chlorine-containing polymers are one of the most important general-purpose plastics, with a world output of more than 30 million t / a. Among them, polyvinyl chloride (PVC) is widely used in chemical building materials, pipes, packaging and other fields. In 2005, my country's PVC output was 6.492 million tons. Due to the particularity of the structure of chlorine-containing polymers, it will inevitably degrade under the action of heat and shear, release HCl with catalytic degradation effect, deepen the color, reduce the mechanical properties, until it loses its use value, so the processing of PVC must u...

AI Technical Summary

Problems solved by technology

However, my country is still dominated by highly toxic, highly polluting, and low-grade lead salt stabilizers, and does not pay enough attention to the development and research of composite metal soaps, resulting in the lack of high-performance auxiliary stabilizers, and there are few varieties of calcium-zinc composite heat fixers. Poor performance, there is a big gap compared with foreign countries

[0003] Traditional calcium stearate (CaSt 2 ), zinc stearate (ZnSt 2 ) as a PVC stabilizer, its stabilizing effect is low, and it will produce "zinc burning" phenomenon, which will make PVC black and degrade completely in a short time

In order to further enhance its stabilizing effect, the CaSt 2 / ZnSt 2 Composite stabilizers add auxiliary stabilizers, such as polyols (Polymer Degradation and Stability.2006, 91: 2233-2240), β-diketones (US4000100), zeolites (US6531533), hydrotalcites (EP1652881), etc. to improve CaSt 2 / ZnSt 2 The stabilizing performance of the compound stabilizer, but the desired effect has not yet been achieved