Transparent powder calcium-zinc composite heat stabilizer for PVC and preparation method thereof

Abstract

The invention provides a transparent powder calcium-zinc composite heat stabilizer for PVC and a preparation method thereof. The transparent powder calcium-zinc composite heat stabilizer comprises the following raw materials in parts by weight: 30-35 parts of a calcium-zinc composite main heat stabilizer, 25-30 parts of an auxiliary heat stabilizer, 10-20 parts of hydrotalcite, 5-10 parts of silicon dioxide, 5 parts of an antioxidant and 5 parts of an ultraviolet light absorber. The calcium-zinc composite main heat stabilizer is formed by compounding epoxy zinc oleate and epoxy calcium oleate, the auxiliary heat stabilizer is formed by magnesium acetylacetonate, the hydrotalcite is formed by modified ternary hydrotalcite, and the silicon dioxide is formed by fumed silica. The calcium-zinc composite main heat stabilizer, the magnesium acetylacetonate auxiliary heat stabilizer and the modified ternary hydrotalcite and fumed silica are used as fillers to be combined according to the proportion, and the transparency of the heat stabilizer is effectively improved according to the efficient coloring inhibition characteristic of the heat stabilizer.

Description

technical field [0001] The invention relates to the technical field of calcium-zinc composite heat stabilizer production, in particular to a transparent powder calcium-zinc composite heat stabilizer for PVC and a preparation method thereof. Background technique [0002] At present, PVC transparent heat stabilizers commonly used in the market include organotin, liquid calcium-zinc (barium-zinc) heat stabilizers, powder calcium-zinc heat stabilizers, etc. Among them, organotin stabilizers are expensive and their toxicity is controversial.", The price of liquid stabilizer is reasonable and the performance is better. However, different manufacturers have different standards and different solvents have different effects on product performance. Usually, they have negative effects on plasticization problems, and there are toxicity problems and precipitation problems. Powder heat stabilizers are not only packaged , transportation and addition are convenient, and it also has great ad...

AI Technical Summary

Problems solved by technology

Although calcium soap has a great influence on the coloring performance of the product, it is an effective substance for inhibiting zinc burning due to its unique relieving effect on zinc burning, especially calcium hydroxide and other powders have a great effect on improving the calcium-zinc stabilizer Congo. Red hour has a clear effect

But it is also due to its heavy coloring, even a small amount cannot make it used in transparent products, resulting in low transparency