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Orgnic rare earth thiolate composite stabilizator for halogen-containing polymer and application thereof

A composite stabilizer and thiolate technology, applied in the chemical industry, can solve the problems of not greatly improving the thermal stability performance, not reflecting the characteristics of rare earth metals, limited thermal stability effect, etc., achieving long thermal stability time, low toxicity, Small coloration effect

Inactive Publication Date: 2007-07-18
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the development of rare earth composite stabilizers is limited to rare earth organic carboxylates. This kind of stabilizer is non-toxic, tasteless, has good thermal stability and long-term weather resistance, and can completely replace lead salts, metal soaps and partially replace organic tin It belongs to the new generation of green environmental protection products; however, the thermal stabilization effect of this stabilizer is quite limited and cannot be used independently. Out of the characteristics of rare earth metals, the thermal stability has not been greatly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Three (lauryl mercaptan) lanthanum stabilizer:

[0040] 31.6 g (0.1 mol) of anhydrous lanthanum acetate, 18 g (0.3 mol) of isopropanol, and 100 ml of toluene were added to the reactor, 7.6 g (0.3 mol) of sodium metal were added under stirring, and the reaction was refluxed for 2 hours. After filtration, 6.9g (0.3mol) lauryl mercaptan was added to the filtrate, and the reaction was stirred at room temperature for 1 hour; then in a rotary evaporator, at a temperature of 70°C and a pressure of 4K Pa, for 3 hours, and finally The white waxy tris (lauryl mercaptan) lanthanum was obtained.

Embodiment 2

[0042] Tris (isooctyl thioglycolate) lanthanum stabilizer:

[0043] 31.6 g (0.1 mol) of anhydrous lanthanum acetate, 14 g (0.3 mol) of ethanol, and 100 ml of benzene were added to the reactor, 2.1 g (0.3 mol) of lithium metal were added under stirring, and the reaction was refluxed for 2 hours. After filtration, 61 g (0.3 mol) of isooctyl thioglycolate was added to the filtrate, and the reaction was stirred at room temperature for 1 hour; then in a rotary evaporator, at a temperature of 70°C and a pressure of 4K Pa, for 3 hours. Finally, a slightly yellow waxy lanthanum tris(isooctyl thioglycolate) was prepared.

Embodiment 3

[0045] Three (lauryl mercaptan) cerium stabilizer:

[0046] Add 31.6g (0.1mol) of anhydrous cerium(III) acetate, 18g (0.3mol) of isopropanol, and 100ml of toluene into the reactor, add 7.6g (0.33mol) of sodium metal under stirring conditions, and react under reflux for 2 hours . After filtration, 6.9g (0.3mol) lauryl mercaptan was added to the filtrate, and the reaction was stirred at room temperature for 1 hour; then in a rotary evaporator, at a temperature of 70°C and a pressure of 4K Pa, for 3 hours, and finally The brown waxy tris(lauryl mercaptan) cerium was prepared.

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PUM

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Abstract

The present invention discloses one kind of composite stabilizer of organic RE thiolate for halogen containing polymer and its application. The composite stabilizer is compounded with La, Ce, Pr or Nd thiolate formed with sulfhydryl compound and its mixture, organic metal stabilizer, lubricant, organic stabilizing assistant, etc. It has the features of long heat stabilizing period, low toxicity, etc. and may be used as the heat stabilizer in processing halogen containing polymer.

Description

Technical field [0001] The invention relates to the field of chemical engineering, in particular to an organic rare earth thiolate composite stabilizer and its application. Background technique [0002] Halogen-containing polymers such as polyvinyl chloride have excellent corrosion resistance and mechanical properties, and at the same time are low in price, abundant in raw materials, and mature in manufacturing processes. Their products are widely used in various fields of industrial and agricultural production. However, there is a fatal weakness in the processing of halogen-containing polymers, that is, poor thermal stability. Therefore, heat stabilizers must be used when processing halogen-containing polymers. Commonly used heat stabilizers in the processing of halogen-containing polymers include lead salts, organic tins, and metal soaps. However, lead salt heat stabilizers are more toxic to human health and cause pollution to the environment. Organotin heat stabilizers are exp...

Claims

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Application Information

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IPC IPC(8): C08K5/57C08L23/28C08L15/02C08L25/18C08L27/24C08K5/36C08K5/06C08K5/524
Inventor 陈鸣才祝纶宇王洪刘鹏陈德宏张怀平
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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