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A kind of rare earth calcium-zinc composite heat stabilizer and its preparation and use method

A composite thermal stabilizer, rare earth calcium technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc., can solve the problems of poor initial thermal stability, zinc burning and other problems, and achieve good initial and long-term Thermal stability, versatility, good compatibility

Active Publication Date: 2015-09-09
江西宏远化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long-term thermal stability of rare earth heat stabilizers is better than that of lead salts and calcium / zinc composite heat stabilizers, and its initial thermal stability is not good when used alone. In order to improve its initial thermal stability, rare earth heat stabilizers are generally The combination of zinc salt and zinc stearate can solve the initial coloring problem, but with the increase of the content of zinc stearate component, it may cause problems such as "zinc burning"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: the preparation of citral

[0016] Adopt intermittent vacuum distillation method to prepare citral from Litsea cubeba oil. The vacuum degree is controlled at 2-3×133.32 Pa, the temperature of the collected fractions is controlled at 90-95°C, and the content of citral reaches over 95%. .

Embodiment 2

[0017] Example 2: Preparation of 3,7-dimethyl-2,6-octadienoic acid

[0018] The catalytic oxidation of citral prepared in Example 1 uses sepiolite-loaded manganese dioxide as a catalyst and hydrogen peroxide as an oxidant, and prepares 3,7-dimethyl-2,6-octadienoic acid by liquid phase reaction, The molar equivalent ratio of citral to hydrogen peroxide is 1:1.25, the amount of the catalyst sepiolite-loaded manganese dioxide catalyst is 8% of the mass of citral, the reaction temperature is 20°C, and the reaction time is 9h to obtain 3,7-dimethyl Base-2,6-octadienoic acid is a mixed product of cis-trans isomers, namely (Z)-3,7-dimethyl-2,6-octadienoic acid and (E)-3,7- Mixture of dimethyl-2,6-octadienoic acid.

Embodiment 3

[0019] Example 3: Preparation of 3,7-dimethyl-2,6-octadienoic acid

[0020] The catalytic oxidation of citral prepared in Example 1 uses sepiolite-loaded manganese dioxide as a catalyst and hydrogen peroxide as an oxidant, and prepares 3,7-dimethyl-2,6-octadienoic acid by liquid phase reaction, The molar equivalent ratio of citral to hydrogen peroxide is 1:1.4, the amount of the catalyst sepiolite-loaded manganese dioxide catalyst is 4% of the mass of citral, the reaction temperature is 25°C, and the reaction time is 12h to prepare 3,7-dimethyl Dimethyl-2,6-octadienoic acid is a mixed product of cis / trans isomers, namely Z-3,7-dimethyl-2,6-octadienoic acid and E-3,7-dimethyl -2, the mixture of 6-octadienoic acid, other are with embodiment 2.

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PUM

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Abstract

The invention discloses a compound rare-earth calcium zinc heat stabilizer which comprises a main stabilizer and an auxiliary stabilizer, wherein the main stabilizer comprises the following components: 3,7-dimethyl-2,6-octadienoic acid rare earth, calcium stearate and zinc laurate; the auxiliary stabilizer comprises the following components: dibenzoyl methane, triphenyl phosphite, distearyl thiodipropionate, dihendecyl phthalate and epoxy soybean oil. The invention further provides a preparation method and a use method of the composite rare-earth calcium zinc heat stabilizer. The preparation method comprises the following steps: oxidizing citral in litsea cubeba oil to obtain 3,7-dimethyl-2,6-octadienoic acid, and reacting with rare earth chloride to prepare the 3,7-dimethyl-2,6-octadienoic acid rare earth; compounding the 3,7-dimethyl-2,6-octadienoic acid rare earth, calcium stearate and zinc laurate to generate a good synergistic effect so as to obtain the compound rare-earth calcium zinc heat stabilizer with excellent performance.

Description

technical field [0001] The invention relates to a rare earth calcium-zinc composite thermal stabilizer and a preparation method thereof, belonging to the field of novel rubber and plastic stabilizers in new material additives. Background technique [0002] PVC heat stabilizers mainly include lead salts, organotin, calcium / zinc composite heat stabilizers and rare earth heat stabilizers, etc. However, lead salt heat stabilizers are actually used most in the processing of PVC products. Lead salt has good thermal stability effect, but its biggest disadvantage is that the heavy metal lead is poisonous to the human body, and its application field is constantly restricted. . Organotin heat stabilizers are expensive, most of them have odor, and some varieties are toxic. Calcium / zinc composite thermal stabilizer is environmentally friendly, but its thermal stability is unstable, and its application fields are limited. The long-term thermal stability of rare earth heat stabilizers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K5/098C08K5/526C08K5/372C08K5/12C08K5/1515C08K5/07C07C57/13C07C51/285
Inventor 吴旅良周作良
Owner 江西宏远化工有限公司
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