Hydrotalcite and lanthanum ricinoleate composite environmental-protection stabilizer for PVC and preparation method thereof

Abstract

The invention provides a hydrotalcite and lanthanum ricinoleate composite environmental-protection stabilizer for PVC. The hydrotalcite and lanthanum ricinoleate composite environmental-protection stabilizer for PVC is prepared from the following raw materials (by weight): 20-30 parts of modified Mg-Al hydrotalcite, 10-12 parts of tin dilaurate, 6-9 parts of lanthanum ricinoleate, 1-3 parts of triethyl phosphate, 3-6 parts of barium stearate, 2-4 parts of epoxidized soybean oil, 10-13 parts of propanediol sebacate polyester, 5-6 parts of zinc stearate, 2-4 parts of 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 2-4 parts of ethylene bis-stearamide and 10-14 parts of potassium feldspar powder. The PVC stabilizer of the invention has good heat stability and processability, is environmentally-friendly, nontoxic and low-cost, has good plasticity during processing of PVC, can reduce balance torque and has good transparency.

Description

technical field [0001] The invention relates to the field of PVC additives, in particular to a PVC hydrotalcite lanthanum ricinoleate composite environmental-friendly stabilizer and a preparation method thereof. Background technique [0002] With its superior physical properties and low cost, PVC is widely used in chemical industry, materials, machinery, agriculture, daily necessities and other fields, especially in the field of plastics, and is known as one of the five general-purpose plastics. However, PVC has a very important defect, that is, it is easy to decompose and generate HCl gas during thermal processing, and self-catalysis leads to severe degradation of PVC, which affects various properties of PVC products, such as discoloring PVC products or reducing its mechanical properties. In order to overcome this defect of PVC, it is mainly to add an appropriate amount of stabilizer during the thermal processing of PVC. [0003] The only heat stabilizers that are generall...

AI Technical Summary

Problems solved by technology

Rare earth heat stabilizers have good thermal stability, but the early thermal stability is not high, and the initial coloring is poor, so they cannot be the main stabilizer alone, so their application and promotion are limited. The application of a single rare earth heat stabilizer is often difficult to meet the needs of PVC processing. Composite and multi-functional rare earth heat stabilizers have become the development trend according to the requirements of application performance