Rare earth complex heat stabilizer for PVC and method for preparing same

A heat stabilizer and rare earth compound technology, which is applied in the field of rare earth compound heat stabilizer for PVC and its preparation, can solve the problems of low coloring performance and poor initial stability, and achieve good flexibility, good initial and long-term thermal stability Performance, the effect of broad market prospects

Inactive Publication Date: 2008-10-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic weak salts such as rare earth stearate developed in recent years have shown good effects in PVC thermal stability, but when rare earth stabilizers are used alone, the initial stabili...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of Rare Earth Calcium-Zinc Composite Thermal Stabilizer with Wool Acid

[0026] ①Saponification reaction of wollen acid: Weigh 2-4g of sodium hydroxide, then dissolve it in an aqueous ethanol solution with a volume concentration of 80-90% at 75-78°C, and then add 10-25g of it while stirring The melted crude wool acid was stirred and reacted for 1.5-2 hours.

[0027] ②Preparation of rare earth chloride salt solution: weigh about 0.005-0.010mol of RE 2 o 3 , and then add 2 to 5 ml of hydrochloric acid solution with a concentration of 0.015 to 0.03 mol / L, dissolve while heating, and dilute to 10 to 30 ml after clarification.

[0028] ③Metathesis reaction of sodium lanolate soap: adjust the pH of the saponification solution to 7.0-9.0 while it is hot, then cool down to 60°C, add warm water at 60-70°C, and after the saponification solution is evenly stirred, add 10-10% of the saponification solution to it. 30ml of RECl 3 solution, 1.5-2.5g of CaCl 2 and 2.0-...

Embodiment 2

[0030] Preparation of Rare Earth Barium Zinc Heat Stabilizer of Wool Acid

[0031] ① Saponification reaction of wollen acid, weigh 2-4g of sodium hydroxide, then dissolve it in an aqueous ethanol solution with a volume concentration of 80-90% at 75-78°C, and then add 10-25g of it while stirring The molten crude wool acid, stirring reaction 1.5-2h.

[0032] ②Preparation of rare earth chloride salt solution: weigh about 0.005-0.010mol of RE 2 o 3 , and then add 2 to 5 ml of hydrochloric acid solution with a concentration of 0.015 to 0.03 mol / L, dissolve while heating, and dilute to 10 to 30 ml after clarification.

[0033] ③Adjust the pH of the saponification solution to 7.0~9.0 while it is hot, then cool down to 60°C, add warm water at 60~70°C, and after the saponification solution is evenly stirred, add 10~30ml of RECl in step ② into it 3 solution, 3.4-5.2 g of BaCl 2 2H 2 O and 2.0-7.0 g of ZnSO 4 ·7H 2 O. After reacting for 1-1.5 hours, filter the product with suction...

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Abstract

The invention provides a PVC rare-earth composite heat stabilizer and a method for making the same. The heat stabilizer is a wool acid metal rare-earth soap stabilizer and has a general chemical equation of xRE.yCa.zZn.(OOCR)n or x'RE.y'Ba.z'Zn.(OOCR)n. The method for making the heat stabilizer comprises the following steps that: sodium hydroxide is dissolved into an ethanol water solution and is stirred as well as is condensed and flowed back, the melting common and braid wool acid is added to adjust the pH value and decrease the temperature; water, chlorination rare-earth salt solution and salt are added in sequence to be pumped, filtered, washed by ethanol and water, dried and grinded into a product. The stabilizer adopts the common and braid wool acid as the raw material, thereby having wide resources, low cost, reasonable and scientific preparation method and great maneuverability; the product is straw yellow powder and has good primary and long-term heat stabilization performance of PVC and good effects in the aspects of material process and mechanical performance, is nontoxic and protects the environment, and can be applied to the processing and forming aspects of PVC water supply and drainage pipes and have evident social and economical benefits.

Description

technical field [0001] The invention belongs to the field of heat stabilizer manufacturing for PVC, and more specifically relates to a rare earth composite heat stabilizer for PVC and a preparation method thereof. Background technique [0002] my country is a big country of rare earths. At present, the rare earth heat stabilizers that have variable price elements, metal-like soaps and rare earth complexation in the stabilization of PVC have increasingly become the focus of attention. Most of them are stabilizers of rare earth organic weak salts. Mainly, their long-term thermal stability to PVC is better than that of lead salts and other metal soaps, and has good long-term thermal stability, and has a wide range of synergistic effects with other types of stabilizers, and has good tolerance , not polluted by S, stable storage, low toxicity and environmental protection, good lubricating performance, but also has the functions of coupling, volume expansion, toughening, improving m...

Claims

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Application Information

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IPC IPC(8): C08K5/098C08L27/06
Inventor 郑玉婴胡阳
Owner FUZHOU UNIV
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