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

A compound stabilizer and mercaptide technology, applied in the chemical industry, can solve the problems of no significant improvement in thermal stability, lack of rare earth metal characteristics, and limited thermal stabilization effect, achieving long thermal stability, low toxicity, Small coloring effect

Inactive Publication Date: 2009-02-04
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] Tris(Lauryl Mercaptan) Lanthanum Stabilizer:

[0040] Add 31.6g (0.1mol) of anhydrous lanthanum acetate, 18g (0.3mol) of isopropanol, and 100ml of toluene into the reactor, add 7.6g (0.3mol) of sodium metal under stirring conditions, and react under reflux for 2 hours. After filtering, add 6.9g (0.3mol) lauryl mercaptan to the filtrate, and stir and react at room temperature for 1 hour; then in a rotary evaporator, the temperature is 70°C and the pressure is 4K Pa. Conditions, rotary steaming for 3 hours, and finally Lanthanum tris(laurylmercaptan) was obtained as a white wax.

Embodiment 2

[0042] Tris (isooctyl thioglycolate) lanthanum stabilizer:

[0043] Add 31.6g (0.1mol) of anhydrous lanthanum acetate, 14g (0.3mol) of ethanol, and 100ml of benzene into the reactor, add 2.1g (0.3mol) of lithium metal under stirring conditions, and reflux for 2 hours. After filtering, add 61g (0.3mol) isooctyl mercaptoacetate to the filtrate, and stir and react at room temperature for 1 hour; Finally, lanthanum tris(isooctyl thioglycolate) was obtained as yellowish wax.

Embodiment 3

[0045] Tris(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 reflux for 2 hours . After filtering, add 6.9g (0.3mol) lauryl mercaptan to the filtrate, and stir and react at room temperature for 1 hour; then in a rotary evaporator, the temperature is 70°C and the pressure is 4K Pa. Conditions, rotary steaming for 3 hours, and finally Cerium tris(laurylmercaptan) was obtained as a brown wax.

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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 industry, 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 are cheap, rich in raw materials, and mature in manufacturing technology. Their products are widely used in various fields of industrial and agricultural production. However, a fatal weakness in the processing of halogen-containing polymers is poor thermal stability, so heat stabilizers must be used in the processing of halogen-containing polymers. Heat stabilizers commonly used in the processing of halogen-containing polymers include lead salts, organic tins, and metal soaps. However, lead salt heat stabilizers are more harmful to human health and pollute the environment. Organotin heat stabilizers are expensive and have a bad smell, and only a few varieti...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
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
OwnerGUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI