A kind of preparation method of polyvinyl chloride resin special for chlorination

A technology of polyvinyl chloride resin and vinyl chloride monomer, which is applied in the field of organic synthesis, can solve the problems of film thickness and low film coverage, achieve less film, improve particle distribution concentration and apparent density, and small particle size Effect

Active Publication Date: 2019-07-26
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two kinds of polyvinyl alcohol with high degree of alcoholysis and hydroxypropyl methylcellulose are used as composite dispersants, polyvinyl alcohol with low degree of alcoholysis is used as auxiliary dispersant, and sorbitan fatty acid ester is added as porosity regulator. Perform vinyl chloride suspension polymerization to prepare resin with high porosity and low film coverage, but the film is still thick

Method used

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  • A kind of preparation method of polyvinyl chloride resin special for chlorination
  • A kind of preparation method of polyvinyl chloride resin special for chlorination
  • A kind of preparation method of polyvinyl chloride resin special for chlorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The DCS control system automatically controls the addition of 62.5 kg of quality agent and 25 tons of vinyl chloride monomer into the closed polymerization kettle. After pre-mixing for 40 minutes, 29 tons of deionized water, 4.3 kg of main dispersant I, 8.2 kg main dispersant II, 8kg dibutyltin dilaurate, 5kg ammonium bicarbonate, 8.5kg tert-butyl peroxyneodecanoate, 8.5kg bis(3,5,5)-trimethylhexanoyl peroxide, 0.85kg mercapto Ethanol and other materials are automatically and accurately added to 70m through the closed feeding technology under the control of the DCS system 3 In the polymerization kettle, after cold stirring for 20 minutes, the temperature is automatically raised to the reaction temperature of 61.5°C for polymerization. After 90 minutes of reaction, 2.5kg of mercaptoethanol is added again, and the polymerization reaction is carried out for 4.5 hours. The pressure is reduced by 0.05MPa and 15kg of terminator is automatically added to terminate. The polyvin...

Embodiment 2

[0047] The DCS control system automatically controls adding 50kg of quality agent and 25 tons of vinyl chloride monomer into the closed polymerization kettle. After premixing for 30 minutes, 29 tons of deionized water, 4.3kg of main dispersant I, and 8.2kg of Main dispersant II, 8kg containing thioctyl tin, 5kg ammonium bicarbonate, 8.5kg tert-butyl peroxyneodecanoate, 8.5kg bis(3,5,5)-trimethylhexanoyl peroxide, 0.85kg mercaptoethanol and other materials , through closed feeding technology, under the control of DCS system, automatically and accurately add 70m 3 In the polymerization kettle, after cold stirring for 30 minutes, the temperature is automatically raised to the reaction temperature of 61.5°C for polymerization. After 90 minutes of reaction, 2.5kg of mercaptoethanol is added again, and the polymerization reaction is 4.0h. The pressure is reduced by 0.01MPa and 15kg of terminator is automatically added to terminate. The polyvinyl chloride resin slurry specially used ...

Embodiment 3

[0049] The DCS control system automatically controls the addition of 31.25 kg of quality agent and 25 tons of vinyl chloride monomer into the closed polymerization kettle. After pre-mixing for 20 minutes, 29 tons of deionized water, 4.3 kg of main dispersant I, 8.2 kg main dispersant II, 8kg fatty acid zinc, 5kg ammonium bicarbonate, 8.5kg tert-butyl neodecanoate, 8.5kg bis(3,5,5)-trimethylhexanoyl peroxide, 0.85kg mercaptoethanol and other materials , through closed feeding technology, under the control of DCS system, automatically and accurately add 70m 3 In the polymerization kettle, after cold stirring for 40 minutes, the temperature is automatically raised to the reaction temperature of 61.5°C for polymerization. After 90 minutes of reaction, 5.5kg of trichlorethylene is added again, and the polymerization reaction is 4.0h. The pressure is reduced by 0.01MPa and 15kg of terminator is automatically added. The polymerization reaction is terminated to obtain polyvinyl chlori...

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Abstract

The invention relates to a preparation method of special polyvinyl chloride resin for chlorination. The method comprises the following steps: uniformly premixing a quality agent and vinyl chloride monomer in advance, adding deionized water, a dispersing agent I, a dispersing agent II, a PH regulator, a heat stabilizer, a chain transfer agent and an initiator into a polymerization reactor to perform polymerization reaction, ensuring that the quality agent adopts water soluble polyvinyl alcohol with low polymerization degree and low alcoholysis degree, and the dispersing agent I adopts grafted polyvinyl alcohol copolymer resin, and adopting special production technology to premix the quality agent and the vinyl chloride monomer in advance. The special polyvinyl chloride resin for chlorination, prepared through the method, has the advantages that the particle surface films are less or no film exists, the resin particle shapes are regular, the structure is loose, pore distribution is uniform, the degree of concentration of resin particle sizes is high, polymerization reaction is stable during production, and the quality repeatability of all batches of resin is good, and the special polyvinyl chloride resin is particularly applicable to the preparation of chlorinated polyvinyl chloride resin through chlorination.

Description

technical field [0001] The invention belongs to the field of organic synthesis, and relates to a preparation method of polyvinyl chloride resin, in particular to a preparation method of polyvinyl chloride resin special for chlorination. Background technique [0002] Polyvinyl chloride resin (PVC resin for short) is a thermoplastic polymer compound polymerized from vinyl chloride monomer. Due to its excellent flame retardancy, abrasion resistance, chemical resistance, transparency, electrical insulation and other characteristics, PVC resin is widely used in industry, construction, agriculture, packaging, electric power and other fields, and has become the most widely used in the world. One of the wide variety of plastics. With the rapid expansion of PVC resin production in my country, the production technology of suspended PVC resin in my country has also made great progress in recent years. However, compared with foreign advanced technologies, there are still certain gaps ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C08F2/38C08F2/01C08F2/44C08F2/20C08L27/06C08L29/04C08F8/20
CPCC08F2/01C08F2/20C08F2/38C08F2/44C08F8/20C08L27/06C08L29/04C08F114/06
Inventor 宋晓玲黄东王祖芳周军王明亮王志荣赵浩淼
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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