Environment-friendly, low-smoke and lead-free PVC electrical tube and preparation method thereof

A technology for smoke and lead-free polyvinyl chloride and electrical pipes is applied in the field of environmental protection and low-smoke lead-free polyvinyl chloride electrical pipes and its preparation. The effect of improved stability, good synergy, and improved processing performance

Active Publication Date: 2015-09-02
HANGZHOUSNGOOSE ELECTRICAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this type of flame retardant is used alone, the flame retardant effect is not ideal, and the addition amount is large, which not only increases the cost of the product but also affects the bending properties of the material
[0005] Moreover, the current production of PVC electrical pipes uses a large amount of

Method used

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  • Environment-friendly, low-smoke and lead-free PVC electrical tube and preparation method thereof
  • Environment-friendly, low-smoke and lead-free PVC electrical tube and preparation method thereof
  • Environment-friendly, low-smoke and lead-free PVC electrical tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 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%.

[0069] 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

[0072] 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%.

[0073] 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

[0077] 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% .

[0078] 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 environment-friendly, low-smoke and lead-free PVC electrical tube and a preparation method thereof. The electrical tube comprises the following components in mass part: 100 parts of PVC resin, 20-25 parts of calcium carbonate, 3.0-5.0 parts of organic composite heat stabilizer, 8-12 parts of impact-resistant agent, 2-3 parts of hydrotalcite, 5-8 parts of reinforcing agent, 2-4 parts of halogen-free anti-smoke flame retardant, 1-2 parts of internal and external lubricants, and 0.7-1.3 parts of TiO2. According to a formula ratio, the calcium carbonate is added firstly to be mixed at a high speed, and water in the calcium carbonate is removed. After that, the PVC resin is added to be mixed at a high speed for 2-3 min, and then other components are added to be thermally mixed and kneaded at a high speed for 10-15 mins. In this way, the temperature of an obtained product is up to 120-130 DEG C. Later, the product is cooled with the provision of cooling water at a stirring speed of 10-15 r/min to be discharged at 40-50 DEG C. Finally, the product is reheated to be plasticized, extruded and molded at 150-220 DEG C. The electrical tube is good in rigidness, anti-bending performance, heat resistance, aging resistance and insulativity, low in manufacturing cost and simple in machining process.

Description

technical field [0001] The invention relates to the field of polyvinyl chloride electrical pipe materials, in particular to an environment-friendly low-smoke lead-free polyvinyl chloride electrical pipe 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. With the further enhancement of people's awareness of envir...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/26C08K3/22C08K5/098C08K5/3462C08K5/405C08K5/07
CPCC08K2201/011C08K2201/014C08L27/06C08L2201/08C08L2203/20C08L23/06C08K13/06C08K9/08C08K3/26C08K2003/265C08K2003/2241C08K5/098C08K5/3462C08K5/405C08K5/07
Inventor 朱杭琦盛仲夷马骥徐康郭芷含谢松桂
Owner HANGZHOUSNGOOSE ELECTRICAL
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