Organic composite heat stabilizer and preparation method thereof

A composite heat stabilizer, an organic technology, applied in the field of composite materials, can solve the problems of accelerated PVC decomposition, short-acting heat stabilizers, poor stability, etc., and achieve the effects of dust reduction, excellent static thermal stability, and thermal stability improvement

Active Publication Date: 2015-09-02
杭州鸿雁管道系统科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional Zn soap stabilizers have poor stability to PVC, are short-acting heat stabilizers, and are prone to serious zinc burning phenomenon in the later stage of stability (mainly because the ZnCl produced is a strong Lewis acid, which has catalytic HCl removal, thereby The phenomenon of catalyzing and accelerating the decomposition of PVC), but it has the characteristics of excellent initial colorability and strong weather resistance

Method used

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  • Organic composite heat stabilizer and preparation method thereof
  • Organic composite heat stabilizer and preparation method thereof
  • Organic composite heat stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Add 0.1mol sodium metal to 100ml absolute ethanol, stir and reflux for 0.5h to prepare a concentrated sodium ethylate / ethanol solution; 0.1mol urea, 0.2mol cyanoacetic acid, and 0.1mol acetic anhydride are reacted and refluxed for 40min at 80°C in a 500ml three-necked flask Finally, add 100ml of the prepared concentrated sodium ethylate / ethanol solution and continue to heat and reflux for 3h, then slowly add hydrochloric acid solution dropwise to adjust the pH to 7, then add 0.1mol of stearic acid until it completely melts and dissolves; after raising the temperature to 95°C, Slowly add 0.1mol of zinc chloride dropwise, and then stir for 2.5h after dropping, after cooling to room temperature, filter the product with suction, soak and wash with water mist, dry at 80-90°C to constant weight, and prepare N,N-di Methyl-6-aminouracil zinc salt, yield 83%.

[0055] Convert the anion to CO 3 2- 0.95 kg of hydrotalcite, 0.05 kg of bisphenol A epoxy resin (E44) with an epoxy v...

Embodiment 2

[0058] Add 0.1mol sodium metal to 100ml absolute ethanol, stir and reflux for 0.5h to obtain a concentrated sodium ethylate / ethanol solution; add 0.1mol urea and continue to reflux for 0.5h, then add 10.6ml of ethyl cyanoacetate dropwise and continue to reflux for 3h before cooling Slowly add hydrochloric acid solution dropwise to adjust the pH to 7, then add 0.1mol of stearic acid until it is completely melted and dissolved; after raising the temperature to 90-95°C, slowly add 0.1mol of zinc chloride dropwise, and then stir for 2.5h after the dropwise completion. After cooling to room temperature, the product was suction-filtered, soaked and washed with water mist, and dried at 80-90° C. to constant weight to prepare N-methyl-6-aminouracil zinc salt with a yield of 93%.

[0059] Convert the anion to CO 3 2- 0.95 kg of hydrotalcite, 0.05 kg of bisphenol A epoxy resin (E44) with an epoxy value of 0.4 to 0.6, pre-mixed evenly, and sheared and mixed for 20 minutes on a mixer at ...

Embodiment 3

[0063] Add 0.1mol sodium metal to 100ml absolute ethanol, stir and reflux for 0.5h to obtain a concentrated sodium ethylate / ethanol solution, then add 0.1mol thiourea and continue to reflux for 0.5h, then add 10.6ml of ethyl cyanoacetate dropwise and continue to reflux for 3h . After cooling, add 4mol / L hydrochloric acid solution dropwise to adjust the pH to 7, then add 0.1mol stearic acid until it completely melts and dissolves; after raising the temperature to 90-95°C, slowly add 0.1mol zinc sulfate heptahydrate dropwise. Stir for another 2.5h, after cooling to room temperature, filter the product with suction, soak and wash with water mist, and dry at 80-90°C to constant weight to prepare N-methyl-6-thiosemicarbazide zinc salt with a yield of 95% .

[0064] Convert the anion to CO 3 2- 0.95 kg of hydrotalcite, 0.05 kg of bisphenol A epoxy resin (E44) with an epoxy value of 0.4 to 0.6, after pre-mixing uniformly, shear and knead for 20 minutes on a mixer at 140 ° C to obt...

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Abstract

The invention discloses an organic composite heat stabilizer and a preparation method thereof. The organic composite heat stabilizer comprises the following components in weight percentage: 30-65% of uracil derivative-based zinc salt, 5-30% of diketone compound, 10-40% of organic hydrotalcite and 2-15% of polyhydric stearate. According to the preparation method of the organic composite heat stabilizer, in the above formula ratio, the uracil derivative-based zinc salt, the diketone compound, the organic hydrotalcite and the polyhydric stearate are mixed up at a high speed at 60-85 DEG C, and then the obtained mixture is added into a single screw extruder to be cohered and extruded at 60-85 DEG C. After that, the mixture is cooled by air, and diced as 2-3mm master batches. According to the invention, the synergistic effect of all the above components is realized, and the initial colorability of the PVC is effectively improved. Meanwhile, the zinc-firing phenomenon and the environment-friendliness of conventional calcium-zinc stabilizers are improved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an organic composite heat stabilizer and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose resins (PE, PVC, PP, PS, ABS) in the world. However, the structure of PVC is unstable, and it is easy to degrade during processing and molding. When the processing temperature reaches 90°C, a slight thermal decomposition reaction occurs; when the temperature reaches 120°C, an obvious thermal decomposition reaction occurs, making the color of PVC gradually deepen. Therefore, heat stabilizers must be used to prevent thermal decomposition of PVC during processing. [0003] Commonly used heat stabilizers mainly include lead salts, metal soaps, organotins, rare earths, and calcium-zinc stabilizers. Lead salt stabilizers are low in price, good in thermal stability, and large in dosage, but they are highly toxic, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/06C08K9/04C08K3/26C08K5/098C08K5/07C08K5/3462C08K5/405C08L27/06
Inventor 朱杭琦盛仲夷徐康马骥郭芷含谢松桂
Owner 杭州鸿雁管道系统科技有限公司
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