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Production method for improving heat stability of polyvinyl chloride resin

A polyvinyl chloride resin and thermal stability technology, which is applied in the production field of improving the thermal stability of polyvinyl chloride resin, can solve the problems of low whiteness of products, poor initial coloring ability, etc., prolong the cleaning cycle and solve the initial discoloration problem , The effect of eliminating the thermal degradation trigger site

Active Publication Date: 2016-02-03
昊华宇航化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a production method for improving the thermal stability of polyvinyl chloride resin, which can solve the problems of poor initial coloring ability and low whiteness of products in the processing and application process of downstream users, and at the same time, the further optimized technical scheme can be Prolong the maintenance cycle in the production process

Method used

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  • Production method for improving heat stability of polyvinyl chloride resin
  • Production method for improving heat stability of polyvinyl chloride resin
  • Production method for improving heat stability of polyvinyl chloride resin

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0036] The production process after the improvement of the production process of polyvinyl chloride resin is as follows: figure 2 As shown, the details are as follows:

[0037] (1) After coating the kettle, start the main feeding procedure, first add buffer, then add pure water, vinyl chloride monomer, dispersant 1, dispersant 2, and initiator in sequence;

[0038] (2) After the reaction is completed, add the compound fatty acid zinc and terminator to terminate the reaction; use the discharge pump to pump the slurry in the kettle into the discharge tank, and then strip and further dry it through the stripper;

[0039] Taking the production process of SG5 type PVC resin as an example, the above process is further introduced in detail as follows:

[0040] (1) at 70m 3 In the reaction kettle, after coating the kettle, start the main feeding procedure, and add 60kg of buffer, 31t of pure water, 25.5t of vinyl chloride monomer, 285kg of dispersant 1, 150kg of dispersant 2, and 9...

Embodiment 2

[0050] Identical to the preparation method in Example 1, the present embodiment only appropriately adjusted the consumption of adding fatty acid zinc, and the addition of each material is:

[0051] at 70m 3 Add 60kg of buffer, 31t of pure water, 25.5t of vinyl chloride monomer, 285kg of dispersant 1, 150kg of dispersant 2, and 90kg of initiator into the reactor in sequence;

[0052] The polymerization reaction temperature was 56.5°C, and 40kg of terminator and 7kg of fatty acid zinc were added after the reaction;

[0053] The concrete type of each material is with embodiment 1.

Embodiment 3

[0055] Identical to the preparation method in Example 1, the present embodiment only appropriately adjusted the consumption of adding fatty acid zinc, and the addition of each material is:

[0056] at 70m 3 Add 60kg of buffer, 31t of pure water, 25.5t of vinyl chloride monomer, 285kg of dispersant 1, 150kg of dispersant 2, and 90kg of initiator into the reactor in sequence;

[0057] The polymerization reaction temperature is 56.5°C, and 40kg terminator and 8kg fatty acid zinc are added after the reaction is completed;

[0058] The concrete type of each material is with embodiment 1.

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Abstract

The invention belongs to the technical field of chlorine-alkali chemical industry, and particularly relates to a production method for improving the heat stability of polyvinyl chloride resin. The production method comprises the following steps: coating a kettle, starting a main feeding program, firstly adding a buffer agent, then sequentially adding pure water and a polyvinyl chloride monomer, a dispersing agent 1, a dispersing agent 2 and an initiator; after the reaction is ended, adding a terminating agent, and carrying out the termination reaction; pumping out a sizing agent in the kettle by utilizing a discharging pump into a discharging tank, steam stripping and further drying by virtue of a steam striping tower. During the reaction process, by adding fatty acid zinc, a resin product with high heat stability can be obtained. Under the condition that the main production device is not changed, the fatty acid zinc is added during the reaction process, so that the performance indexes of the polyvinyl chloride resin product such as heat stability, heat aging whiteness and the like can be well guaranteed; by optimizing the production process, the problem that insoluble matters are adhered on a plate of the steam stripping tower can be solved, the cleaning period is prolonged, the cleaning expense is saved, and the production capacity of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of chlor-alkali chemical industry, and in particular relates to a production method for improving the thermal stability of polyvinyl chloride resin. Background technique [0002] In the prior art, for the polyvinyl chloride resin product prepared by the applicant (Haohua Aerospace Company), downstream users have problems such as poor initial coloring ability and low whiteness of the product during processing and application, so improving the thermal stability of the resin This problem can be better solved, and the technical index of thermal stability greater than or equal to 6 minutes is proposed. For the thermal stability of the resin, most of the existing technologies are optimized from the aspects of material selection, material dosage ratio, reaction temperature, etc., and some improvement effects have been obtained, but none of them can achieve thermal stability greater than or equal to 6 minutes and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/06C08F2/42C08K5/098
Inventor 徐素霞赵光明郑世红王振华韩艳利赵豫生
Owner 昊华宇航化工有限责任公司