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Calcium zinc heat stabilizer used for PVC, zinc-containing compound and application

A technology of zinc compounds and heat stabilizers, applied in the direction of zinc organic compounds, etc., to achieve the effects of easy availability of raw materials, prolongation of zinc burning time, and convenient preparation

Active Publication Date: 2013-07-03
SHENZHEN AIMSEA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compound and the scheme of preparing calcium-zinc heat stabilizer for PVC with this compound and fatty acid calcium, fatty acid zinc, etc. have not been disclosed in relevant documents

Method used

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  • Calcium zinc heat stabilizer used for PVC, zinc-containing compound and application
  • Calcium zinc heat stabilizer used for PVC, zinc-containing compound and application
  • Calcium zinc heat stabilizer used for PVC, zinc-containing compound and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of zinc-containing compound 1: bis(imidazole)-bis(o-hydroxybenzoic acid)-zinc

[0021] Sequentially add 50.0 g to a 1 L three-necked bottle Basic zinc carbonate, 121.0 g o-hydroxybenzoic acid, 89.0 g imidazole, 400.00 g absolute ethanol. Heat to 60 °C, stir, and keep at reflux for 2 h. The system was concentrated to about 100 mL by distillation under reduced pressure, and the system was lowered to room temperature, and the target product was precipitated from the liquid phase. The product was filtered, washed with a small amount of ethanol, and kept in a desiccator. The filtrate was reused.

Embodiment 2

[0023] Preparation of zinc-containing compound two: bis(1,2-dimethylimidazole)-bis(o-hydroxybenzoic acid)-zinc

[0024] 50.0 g of zinc oxide, 170.0 g of o-hydroxybenzoic acid, and 300 g of water were sequentially added into a 1 L three-necked flask. Heat to 80 °C and stir for 0.5 h. 120.0 g dimethylimidazole was added to the system, and the target product was precipitated from the liquid phase. The target product was filtered, washed with a small amount of ethanol, and kept in a desiccator.

[0025] The use effect of the heat stabilizer of the present invention will be illustrated below in conjunction with the PVC composition formulations 1-5 (Table 1) of the application example group 1, and the PVC test pieces and aging tests are made after plasticizing by a two-roller plasticizer. In Table 1, the unit is gram, and the part below the three horizontal lines in column 2-5 of the formula is each component and consumption of the heat stabilizer of the present invention, and for...

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Abstract

The invention relates to a calcium zinc heat stabilizer used for PVC. The calcium zinc heat stabilizer comprises a compound formed by a hydroxyl phenyl carboxylic acid, imidazole ligands and zinc ions, wherein the molecular formula of the compound is Zn(L1)2(L2)2, wherein L1 represents salicylic acid; L2 represents imidazole or L2 represents 1,2-dimethyl imidazole; a frequently-used fatty acid calcium, fatty acid zinc, an auxiliary stabilizer and a lubricating agent. Compared with a calcium zinc heat stabilizer prepared by using the fatty acid zinc and the like as raw materials, the calcium zinc heat stabilizer provided by the invention can effectively improve initial dyeing property and prolong zinc burnt blackening time of a PVC product, has easily available raw materials and is convenient for preparation.

Description

technical field [0001] The invention relates to a heat stabilizer for polyvinyl chloride, in particular to a calcium-zinc heat stabilizer for PVC, a novel zinc-containing compound used in the calcium-zinc heat stabilizer and applications thereof. Background technique [0002] Calcium zinc heat stabilizer is a non-toxic, environmentally friendly additive for polyvinyl chloride (PVC). Usually, this additive is composed of fatty acid zinc, fatty acid calcium and auxiliary additives. Zinc fatty acid can effectively improve the initial colorability of PVC products. However, during the thermal aging process of PVC products, fatty acid zinc can also cause rapid aging and discoloration of products, that is, "zinc burning". Therefore, it is necessary to add an auxiliary heat stabilizer to optimize the stability, so as to improve the initial coloration and delayed zinc burning of PVC aging resistance. At present, the auxiliary heat stabilizers used to optimize these two properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F3/06C08K5/00C08K5/098C08L27/06
Inventor 严一丰
Owner SHENZHEN AIMSEA IND
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