Auxiliary heat stabilizer for PVC (Polyvinyl Chloride) machining

A technology that assists heat stabilizers and stabilizers, applied in the field of stabilizers, can solve problems such as poor synergistic effects, poor initial stability, and cost increases, and achieve the effect of solving stabilizer defects and poor stability

Active Publication Date: 2013-12-18
MATRIX GUANGZHOU CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the traditional PVC heat stabilizers, hydrotalcite (metal Al, Mg, Ca complex) products are very common, but its structure determines that its initial stability is very poor. In order to solve this problem, zinc with good initial stability is generally introduced. Auxiliary stabilizers, but at the same time it also introd

Method used

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  • Auxiliary heat stabilizer for PVC (Polyvinyl Chloride) machining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Take equimolar glycerin with a pure calcium content higher than 60% calcium oxide, a pure zinc content of not less than 50% zinc oxide, and a purity of more than 90% in a formic acid environment, and heat it to 180 ° C for 200 minutes. When it becomes colorless and transparent, cool down to 120°C, add 6-amino-2-mercapto-pyrimidin-4-ol in a total amount equal to glycerin at a rate of 1 ml per second, and keep warm at 80°C for 60 minutes after dropping , filtered, dried, and crushed to obtain a stabilizer.

Embodiment 2

[0013] Example 2: Take equimolar glycerin with a pure calcium content higher than 60% calcium oxide, a pure zinc content of not less than 50% zinc oxide, and a purity of more than 90% in an acetic acid environment, and heat it to 180 ° C for 200 minutes. When it becomes colorless and transparent, cool down to 120°C, add 6-amino-2-mercapto-pyrimidin-4-ol in a total amount equal to glycerin at a rate of 1 ml per second, and keep warm at 80°C for 60 minutes after dropping , filtered, dried, and crushed to obtain a stabilizer.

Embodiment 3

[0014] Example 3: Take equimolar glycerol with a pure calcium content higher than 60% calcium oxide, a pure zinc content of not less than 50% zinc oxide, and a purity of more than 90% in a propionic acid environment, and heat it to 180 ° C for 200 minutes. When the system becomes colorless and transparent, cool down to 120°C, add 6-amino-2-mercapto-pyrimidin-4-ol in an amount equal to glycerin at a rate of 1 ml per second, and keep warm at 80°C for 60 minutes, filtered, dried, and crushed to obtain a stabilizer.

[0015] The stabilizer of embodiment 1-2 gained is used for PVC processing, and the photo of PVC product is as figure 1 shown.

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Abstract

The invention discloses an auxiliary heat stabilizer for PVC (Polyvinyl Chloride) machining. According to the auxiliary heat stabilizer, calcium oxide and zinc oxide are added into a system which takes organic carboxylic acid as a catalyst so as to react with glycerinum, a prepared metal organic complex is just the stabilizer; the reaction comprises the following specific steps: taking calcium oxide, zinc oxide and glycerinum of equal moles, feeding calcium oxide, zinc oxide and glycerinum into an organic carboxylic acid environment, heating to 180 DEG C, reacting for 200 minutes, cooling to 120 DEG C when the reaction system is colorless and transparent, dropwise adding 6-amino-2-sulfydryl-pyrimidine-4-alcohol of which the total additive amount is equal to the mole of glycerinum at a speed of 1ml/s, then performing heat preservation for 60 minutes at 80 DEG C, filtering, drying and crushing so as to obtain the stabilizer. According to the auxiliary heat stabilizer, zinc components for improving the heat stabilization effect at the primary period in PVC machining and calcium components for inhibiting 'zinc combustion' are compounded together, so that the defect of poor stability of the stabilizer at the primary period is solved, and the auxiliary heat stabilizer can be directly used as a stabilizer independently.

Description

technical field [0001] The invention relates to a stabilizer, in particular to an auxiliary heat stabilizer for PVC processing. Background technique [0002] As the second largest synthetic resin in the world, the consumption of polyvinyl chloride (PVC) resin is still growing at a rate of 4% per year in recent years, and the structure of PVC itself determines its thermal degradation and aging characteristics. The processing temperature (180°C) is much higher than its decomposition temperature (120-130°C), which determines that heat stabilizers must be added during the processing and molding of PVC products. The current stabilizers such as lead and tin are due to their performance and The limitations of price and other aspects, the restrictions on the market and economic effects are becoming more and more obvious. In order to meet the requirements of society, market and economy, the development of stabilizers must be developed in the direction of non-toxicity and high ef...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K5/00C08K5/053C08K5/37
Inventor 于跃华张维学
Owner MATRIX GUANGZHOU CHEM CORP
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