Synthesis method for polyvinyl chloride with high polymerization degree on the basis of Pickering emulsion type chain extender

A technology of Pickering emulsion and polyvinyl chloride, which is applied in the field of high-polymerization polyvinyl chloride synthesis, can solve the problems of wide resin molecular weight distribution, increase the complexity of the process, and increase the environmental load, so as to reduce the dosage and avoid poisoning The effect of saving the production cost of emulsification

Active Publication Date: 2018-08-14
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

Whether the chain extender is added at one time or in batches or continuously, the resin produced has problems such as wide molecular weight distribution, uneven quality, and many fish eyes.
At present, there are chain extenders that can be used after being made into emulsions to reduce this impact, but a certain amount of organic surfactants must be added in the preparation process of these chain extender emulsions to increase the degree of environmental load, and some chain extenders The agent emulsion also needs to be pumped in at a constant speed, which increases the complexity of the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of Pickering emulsion-type chain extender: Weigh 0.5g of nano-montmorillonite solid particles and disperse them in 50mL of deionized water, stir with a magnetic stirrer for 30min, and place them in an ultrasonic generator for ultrasonic dispersion for 30min. Stand still for more than 24 hours to fully wet and expand the montmorillonite particles, and then use a high-speed shear emulsifier to stir and disperse for 2 minutes at a speed of 3000rpm to prepare a suspension of montmorillonite solid particles, which is then used; weigh 3g of phthalic acid diene Add propyl ester, 5g ethylene glycol dimethyl acrylate, and 2g octene into the beaker, stir with a magnetic stirrer for 15min to mix the three evenly; then add 30g of montmorillonite solid particle suspension to the beaker, and use High-speed shear emulsification machine emulsified for 4 minutes to prepare Pickering emulsion-type chain extender, sealed and stored, for later use;

[0035](2) Synthesis of ...

Embodiment 2

[0038] (1) Preparation of Pickering emulsion-type chain extender: Weigh 0.5g of nano-montmorillonite solid particles and disperse them in 50mL of deionized water, stir them with a magnetic stirrer for 30 minutes, and then place them in an ultrasonic generator for ultrasonic dispersion for 30 minutes. Stand still for more than 24 hours to fully wet and expand the montmorillonite particles, and then use a high-speed shear emulsifier to stir and disperse for 2 minutes at a speed of 3000rpm to make a suspension of montmorillonite solid particles, and set aside; weigh 2g of diallyl maleate Ester, 10g polyethylene glycol diacrylate and 6g decene were added to the beaker, and stirred with a magnetic stirrer for 15min to mix the oil phase evenly; then 27g montmorillonite solid particle suspension was added to the beaker, and the Emulsion cutting machine shears and emulsifies for 3 minutes to obtain a Pickering emulsion type chain extender, which is sealed and stored for later use;

[...

Embodiment 3

[0042] (1) Preparation of Pickering emulsion-type chain extender: Weigh 0.5g of nano-montmorillonite solid particles and disperse them in 50mL of deionized water, stir them with a magnetic stirrer for 30 minutes, and then place them in an ultrasonic generator for ultrasonic dispersion for 30 minutes. Stand still for more than 24 hours to fully wet and expand the montmorillonite particles, and then use a high-speed shear emulsifier to stir and disperse for 2 minutes at a speed of 3000rpm to make a suspension of montmorillonite solid particles, which is set aside; weigh 2g of cyanuric acid triene respectively Propyl ester, 5g glycerol di(meth)acrylate, 3g dodecene join in the beaker, stir 15min with magnetic stirrer and make the three mix homogeneously; Then add 15g montmorillonite solid particle suspension in the beaker, At room temperature, use a high-speed shear emulsion machine to shear and emulsify for 4 minutes to obtain a Pickering emulsion-type chain extender, which is se...

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Abstract

The invention relates to a synthesis method for polyvinyl chloride with a high polymerization degree on the basis of Pickering emulsion type chain extender. The synthesis method comprises the following steps: firstly, preparing the Pickering emulsion type chain extender from montmorillonite solid particles with an emulsification stability function, the chain extender and the like; then, with a suspension method, synthesizing the polyvinyl chloride with the high polymerization degree. The prepared Pickering emulsion type chain extender is environmentally friendly and high in stability; the Pickering emulsion type chain extender is added in one time when being used and has the advantages of even chain extension function, high utilization ratio, good adaptation in a polyvinyl chloride suspension system, small use amount, moderate polymerization condition and relatively simple technology. The obtained polyvinyl chloride with the high polymerization degree has good resin performance, small'fisheye' amount, good product appearance, higher intensity and better environmental adaptation.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a method for synthesizing polyvinyl chloride with a high degree of polymerization based on a Pickering emulsion type chain extender. Background technique [0002] High degree of polymerization polyvinyl chloride (HPVC for short) resin refers to a polyvinyl chloride (PVC for short) resin with an average degree of polymerization of 1700-4000 or a slightly cross-linked structure between its molecules. Compared with ordinary PVC, it has many excellent properties, such as higher resilience, lower compression set, excellent heat deformation resistance, higher tensile strength and excellent wear resistance, resistance Tear resistance, oil resistance, heat resistance, cold resistance, ozone resistance, etc. The hardness of the product changes little with temperature, and has the matting property of rubber materials. It is suitable as a rubber substitute for sealing materials, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F222/28C08F222/14C08F210/14C08F283/06C08F226/06C08K3/34
CPCC08F214/06C08F283/065C08K3/34C08F226/06C08F222/103C08F210/14C08F222/28C08F222/102
Inventor 顾正明刘湘丁维均方云夏咏梅
Owner 泰州市正大化工有限公司
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