Acetylacetone based composite heat stabilizer

The composite heat stabilizer of zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite solves the problems of initial coloration, long-term performance and transparency of chlorine-containing polymers such as PVC in the existing technology, and achieves efficient thermal stability. Improved stability and transparency ensure the material's stable performance at high temperatures.

CN101508636AInactive Publication Date: 2009-08-19BEIJING UNIV OF CHEM TECH
3 Cites 23 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2009-03-27
Publication Date
2009-08-19
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing heat stabilizers in chlorine-containing polymers such as PVC have problems such as poor initial coloring performance, poor long-term performance, and reduced transparency. In particular, the catalytic decomposition of zinc acetylacetonate, calcium acetylacetonate reduces transparency, and the initial coloring of hydrotalcite Poor performance and difficult to balance multiple functions.

Method used

A composite thermal stabilizer of zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite is used to synthesize nanoscale hydroxide and precipitate and react with acetylacetone to form an optimized mixture for improving chlorine-containing polymers such as PVC. thermal stability and transparency.

Benefits of technology

It has achieved a thermal stability time of more than 90 minutes for chlorine-containing polymers such as PVC in an environment of 200±1℃, optimized the initial coloring performance and long-term performance, maintained the transparency of the material, and significantly improved the thermal stability.

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Abstract

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.
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Citation Information

Patent Citations

  • Composition based on calcium of magnesium acetylacetonate and free or chelated 'beta'-diketones, preparation and use

    CN1263543A

  • Use of monohydrate zinc acetylacetonate as halogenated polymer stabiliser, and prepn. method

    CN1299392A

  • Method for inhibiting the thermal or ultraviolet degradation of thermoplastic resin and thermoplastic resin composition having stability to thermal or ultraviolet degradation

    US4299759A

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