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Composite stabilizer of metal salt of organic carboxylic acid containing sulfur in use for polymer containing halogen, and application

A composite stabilizer, sulfur organic carboxylic acid technology, applied in the chemical field

Inactive Publication Date: 2007-07-25
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

Xiang Kaixiang et al. (Xiang Kaixiang, Qu Long; Preparation of zinc nitrilotriacetate and its thermal stability to PVC; China Plastics, 2001-5, 19 (5), 84-85) also synthesized a kind of ammonia triacetate Zinc acetate heat stabilizer, which has good long-term heat stability for halogen-containing polymers, but it will produce color at the initial stage of heating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Zinc 2-dodecylthioglycolate:

[0045] Add 18.0g (0.782mol) sodium metal into 2000mL methanol and stir for 30min to prepare a sodium methoxide / methanol solution. Under the protection of dry nitrogen, 28.8g (0.313mol) of mercaptoacetic acid was added to the above-mentioned sodium methylate / methanol solution, and after the white precipitate formed was completely dissolved, 2000mL (0.261mol) of 1-bromo-n-dodecane was added dropwise / Ether solution, dropwise, stirred at room temperature for 16h. The reaction solution was poured into 2000 mL of 10% hydrochloric acid solution, separated, the organic layer was washed with water, washed with saturated sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated to obtain colorless 2-dodecylthioacetic acid.

[0046] In a 100mL stainless steel reactor equipped with a stirrer, a thermometer and a heating jacket, add 39g of 2-dodecylthioglycolic acid, melt it at 100°C, start the stirrer and put 2-dodecyl Thiogly...

Embodiment 2

[0048] Calcium 3-Laurylthiopropionate:

[0049] A four-neck round bottom flask is equipped with a reflux condenser, a stirrer, a dropping funnel and a thermometer. Add 0.275mol acrylic acid and 50ml isopropanol into the reaction flask, add dropwise sodium hydroxide solution (0.3mol sodium hydroxide dissolved in 52ml water), and control the temperature between 35°C. Slowly add 0.25mol n-dodecanethiol dropwise, and reflux for 3h after dropping. Add appropriate amount of H to the reaction solution 2 O, then slowly add 0.125mol calcium chloride solution while stirring to carry out metathesis reaction. After the reaction is completed, the reaction product is separated, washed and dehydrated, and then dried under normal pressure at 80°C to obtain white calcium 3-dodecylthiopropionate.

Embodiment 3

[0051] 2-Lauryl laurylthioacetate:

[0052] In a 1000mL stainless steel reactor equipped with a stirrer, a thermometer and a heating jacket, add 195g of 2-dodecylthioglycolic acid, melt it at 90°C, start the stirrer and put 3% hydrogen peroxide, and mix well Finally, add 22.8g of refined mixed light rare earth oxides (wherein the weight of lanthanum oxide accounts for more than 95% of the total weight) to the reaction kettle at 90°C, react at 100°C for 2.5 hours, and release the material after the reaction is completed. After cooling, pulverize into >60 U.S. mesh powder to obtain powdery lanthanum 2-dodecylthioacetate.

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Abstract

This invention discloses a sulfur-containing metal carboxylate composite stabilizer and its application. The sulfur-containing metal carboxylate composite stabilizer comprises: sulfur-containing metal carboxylate, metal salt stabilizer, organic metal stabilizer, lubricant, and organic auxiliary stabilizer. The sulfur-containing metal carboxylate composite stabilizer can be used in halogen-containing polymers to increase their processing stability. The sulfur-containing metal carboxylate composite stabilizer has such advantages as long thermal stabilization period, low early coloration, and low toxicity.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a sulfur-containing organic carboxylic acid metal salt composite stabilizer and application thereof. 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 s...

Claims

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Application Information

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IPC IPC(8): C08K5/58C08L101/00C08K5/57C08K5/59
Inventor 陈鸣才刘鹏祝纶宇陈德宏张怀平许凯
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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