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Synthesis method of high-polymerization-degree extinction polyvinyl chloride based on Pickering emulsion type cross-linking agent

The technology of Pickering emulsion and polyvinyl chloride is applied in the field of synthesizing high degree of polymerization extinction polyvinyl chloride, which can solve the problems of increased production cost, decreased mechanical properties, increased environmental pollution, etc., and can save production cost and reduce dosage. , Environmentally friendly effect

Active Publication Date: 2018-08-31
泰州市正大化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the preparation method of high degree of polymerization matting polyvinyl chloride with a degree of polymerization greater than 1700, most manufacturers adopt the first method, that is, to prepare high degree of polymerization matting polyvinyl chloride by acrylate coating and surface embossing to obtain high polymerization degree. High-degree matting PVC, but this method leads to unfavorable factors such as increased production costs, uneven matting effect, decreased mechanical properties, and increased environmental pollution when manufacturers produce high-polymerized matted PVC.
At present, there are also chemical modifications such as adding a compound that can copolymerize with vinyl chloride and cross-link PVC molecular chains, that is, a cross-linking agent, during the polymerization of vinyl chloride, so that PVC molecules form branches or cross-linked structures that are insoluble in solvents—— At the same time, the degree of polymerization increases, and a high degree of polymerization matting PVC resin with matting effect is obtained, but more crosslinking agents are used, the cost increases, and the resin has more "fish eyes"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of Pickering emulsion type cross-linking agent: Weigh 1.2g of nano-montmorillonite solid particles and disperse them in 60mL of deionized water, stir them with a magnetic stirrer for 40min, place them in an ultrasonic generator for ultrasonic dispersion for 40min, and the suspension Stand still for more than 20 hours to fully wet and expand the montmorillonite particles, then use a high-speed shear emulsifier to stir and disperse for 2 minutes at a speed of 3000rpm to make a solid particle suspension, and set aside; weigh 10g of diallyl phthalate, Add 20g polyethylene glycol dimethacrylate and 10g decene into the beaker, stir with a magnetic stirrer for 15min to mix the three evenly; then add 60g of the prepared montmorillonite solid particle suspension to the beaker, Next, use a high-speed shear emulsion machine to shear and emulsify for 6 minutes to obtain a Pickering emulsion type cross-linking agent, which is sealed and stored for subsequent use;

[...

Embodiment 2

[0035] (1) Preparation of Pickering emulsion type cross-linking agent: Weigh 2.0g of nano-bentonite solid particles and disperse them in 150mL of deionized water, stir with a magnetic stirrer for 40min, place them in an ultrasonic generator for ultrasonic dispersion for 40min, and let the suspension stand More than 20 hours to fully wet and expand the bentonite particles, and then use a high-speed shear emulsifier to stir and disperse for 2 minutes at a speed of 3000rpm to make a solid particle suspension, and set aside; weigh 10g diallyl maleate, 30g ethylene glycol di Add acrylate and 10g decene into the beaker, stir with a magnetic stirrer for 15min to mix the three evenly; then add 150g of the prepared bentonite solid particle suspension into the beaker, and use a high-speed shear emulsifier to emulsify at room temperature 6min, the Pickering emulsion type cross-linking agent was prepared, sealed and preserved, for subsequent use;

[0036] (2) Synthesis of high degree of p...

Embodiment 3

[0039] (1) Preparation of Pickering emulsion type cross-linking agent: Weigh 2.0g of nano-montmorillonite solid particles and disperse them in 320mL of deionized water, stir them with a magnetic stirrer for 40min, place them in an ultrasonic generator for ultrasonic dispersion for 40min, and the suspension Stand still for more than 20 hours to fully wet and expand the montmorillonite particles, then use a high-speed shear emulsifier to stir and disperse for 2 minutes at a speed of 3000 rpm to make a solid particle suspension for subsequent use; respectively weigh 17g of diallyl phthalate, Add 51g of polyethylene glycol diacrylate and 12g of octene into the beaker, and stir with a magnetic stirrer for 15min to mix the three evenly; then add 320g of the prepared montmorillonite solid particle suspension to the beaker, and use High-speed shear emulsification machine emulsified for 6 minutes to prepare Pickering emulsion type cross-linking agent, sealed and stored, for later use; ...

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Abstract

The invention relates to a synthesis method of high-polymerization-degree extinction polyvinyl chloride based on a Pickering emulsion type cross-linking agent. The synthesis method comprises the following steps: first preparing the Pickering emulsion type cross-linking agent by utilizing nano solid particles with a function of emulsion stability, a cross-linking agent and the like, and then synthesizing the high-polymerization-degree extinction polyvinyl chloride by a suspension method. The prepared Pickering emulsion type cross-linking agent is environmentally friendly and has strong stability, and the Pickering emulsion type cross-linking agent is added through a plurality of times, so that the cross-linking effect and the formation of a gel is uniform, the utilization rate is high, theadaptability in a polyvinyl chloride suspension system is good, and the usage amount is little. The prepared high-polymerization-degree extinction polyvinyl chloride resin has the advantages of good processing performance, uniform extinction, small ''fisheye'' number, high strength and strong environmental adaptability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for synthesizing high-polymerization-degree matting polyvinyl chloride based on a Pickering emulsion-type crosslinking agent. Background technique [0002] Polyvinyl chloride (PVC) resin is one of the five general-purpose plastics, widely used in industry, agriculture, construction and other fields. In recent years, polyvinyl chloride resin, especially high-polymerization polyvinyl chloride (HPVC) resin, has developed from generalization to high-performance, specialization, engineering and specialization, and with the gradual improvement of domestic and foreign consumers' requirements for product appearance Improvement, many applications require the appearance of HPVC resin to have low gloss and a certain matting effect, so that the demand for matting HPVC resin is increasing. In order to achieve the matting effect, one method, such as the traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F218/18C08F222/20C08F210/14C08F2/44C08F2/22C08K3/34C08F222/28C08F222/14C08F226/06
CPCC08F214/06C08K3/346C08K2201/011C08F218/18C08F222/1063C08F210/14C08F222/103C08F222/102C08F220/14C08F226/06C08F222/28
Inventor 刘湘顾正明丁维均方云夏咏梅
Owner 泰州市正大化工有限公司
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