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Polyvinyl chloride thermal suspension polymerization terminating agent and application thereof

A suspension polymerization and polyvinyl chloride technology, which is applied in the field of polyvinyl chloride thermal suspension polymerization terminator, can solve the problems of high cost and low thermal stability of the terminator, achieve cheap raw materials, improve thermal stability and thermal aging whiteness The effect of simple indicators and preparation methods

Active Publication Date: 2018-09-07
鄂尔多斯市瀚博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a polyvinyl chloride thermal suspension polymerization terminator and its application in order to solve the problems of low thermal stability and high cost of the terminator in the traditional polyvinyl chloride polymerization production

Method used

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  • Polyvinyl chloride thermal suspension polymerization terminating agent and application thereof
  • Polyvinyl chloride thermal suspension polymerization terminating agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A polyvinyl chloride thermal suspension polymerization terminator of this embodiment is composed of the following components in terms of mass percentage: 30% sodium dimethyldithiocarbamate, 20% sodium perchlorate, and 50% deionized water.

[0028]The preparation method of the terminator is: add a certain amount of deionized water, add the sodium perchlorate of the formula amount, stir until it is completely dissolved, then add the sodium dimethyl dithiocarbamate of the formula amount, stir until it is completely dissolved, and make up the formula Measure the water, stir it for 15 minutes, pump it out and pack it in a 200L blue plastic bucket, and store it in a cool and ventilated place.

[0029] The specific process of applying the terminator of this embodiment to the polyvinyl chloride suspension polymerization reaction, taking the production of SG5 type resin as an example: at 105m 3 Atomize and add 12 kg of anti-sticking agent to the polymerization kettle to coat the...

Embodiment 2

[0031] A polyvinyl chloride thermal suspension polymerization terminator of this embodiment is composed of the following components in terms of mass percentage: 30% sodium dimethyldithiocarbamate, 20% sodium perchlorate, 2% sodium isooctanoate, D - Sodium Erythorbate 3%, Deionized Water 45%.

[0032] The preparation method of the terminator is: add a certain amount of deionized water, add the sodium perchlorate of the formula, stir until it is completely dissolved, then add the sodium dimethyl dithiocarbamate of the formula, stir until it is completely dissolved, add the formula A certain amount of organic heat stabilizer (sodium isooctanoate 2%, D-sodium isoascorbate 3%), stirred until fully dissolved, supplemented with the amount of formula water, stirred for 15min, pumped out and packaged in a 200L blue plastic bucket, stored in A cool and ventilated place.

[0033] The specific process applied to the termination of the polyvinyl chloride suspension polymerization reaction...

Embodiment 3

[0035] A polyvinyl chloride thermal suspension polymerization terminator of this embodiment is composed of the following components in terms of mass percentage: 20% sodium dimethyldithiocarbamate, 20% sodium perchlorate, and 60% deionized water.

[0036] The preparation method of the terminator and the specific process of applying it to the suspension polymerization of polyvinyl chloride to terminate the reaction: the same as in Example 1.

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Abstract

The invention provides a polyvinyl chloride thermal suspension polymerization terminating agent and application thereof. The terminating agent is prepared from the following components by mass percent: 20 to 40 percent of alky substituted dithiocarbamate, 10 to 30 percent of perchlorate, and the balance of deionized water. According to the polyvinyl chloride thermal suspension polymerization terminating agent, under the synergistic acceleration effect of the alky substituted dithiocarbamate and the perchlorate, the free radicals and initiator in the polymerization reaction can be rapidly eliminated, the polymerization reaction can be rapidly terminated, the low-molecular-weight polyvinyl chloride molecules, the branch-chained polyvinyl chloride molecules, the terminal dual-bond polyvinyl chloride molecules and the polyvinyl chloride molecules with an allyl chloride structure can be greatly reduced, so that the thermal stability and thermal aging whiteness index of the finished productresin can be increased; and the terminating agent is simple in preparation method, cheap in raw material and capable of decreasing the production cost of polyvinyl chloride.

Description

technical field [0001] The invention relates to the field of polyvinyl chloride resin synthesis, in particular to a polyvinyl chloride thermal suspension polymerization terminator and application thereof. Background technique [0002] Polyvinyl chloride plays an important role in plastic products. It has the advantages of superior performance, strong versatility and low price, and is widely used in the world. The production methods of polyvinyl chloride mainly include suspension polymerization, bulk polymerization, emulsion polymerization and solution polymerization. At present, the suspension polymerization method is the most widely used method in my country's PVC production enterprises. [0003] Suspension polymerization production is a method in which vinyl chloride monomer is dispersed in an aqueous medium in a polymerization kettle, and polyvinyl chloride is prepared through the action of various additives. Auxiliaries used in suspension polymerization include anti-st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/38C08F2/18C08F114/06C08L27/06C08K5/00
CPCC08F2/18C08F2/38C08F114/06C08K5/005C08L2201/08C08L27/06
Inventor 赵长森王会昌王鑫龙苏浩夏伟牛强
Owner 鄂尔多斯市瀚博科技有限公司
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