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Uses of allyloxy hydroxide sodium dimercaptosulphanate in PVC processing aid

The technology of sodium allyloxy hydroxypropanesulfonate and processing aid is applied in the application field of reactive emulsifier in PVC processing aid, which can solve the problem of affecting the wall-sticking performance of PVC and aggravating the processing aid ACR in spray tower. Severity of sticking towers, reduced spray drying rate, etc.

Inactive Publication Date: 2009-04-08
SHANDONG RUIFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of ACR emulsion polymerization, the presence of emulsifier is absolutely indispensable, and it is one of the necessary raw materials for the production of processing aid ACR high molecular polymer. The emulsifier becomes an impurity instead in the finished product. The existence of the emulsifier has disadvantages for the processing aid ACR: it affects the stability of the intermediate ACR emulsion, affects the fusion between the processing aid and the PVC resin, and affects the processing aid. The plasticizing effect on PVC affects the wall-sticking performance of PVC during extrusion, aggravates the severity of the processing aid ACR sticking to the spray tower, reduces the spray drying rate, and increases the labor intensity of workers cleaning the spray tower

Method used

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  • Uses of allyloxy hydroxide sodium dimercaptosulphanate in PVC processing aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 800kg of soft water, 1.1kg of one-stage emulsifier sodium allyloxy hydroxypropyl sulfonate, one-stage monomer (220kg of ethyl acrylate, 220kg of methyl methacrylate and 660kg of butyl acrylate) in the reactor, close the reactor, and heat up , nitrogen protection, when the temperature rises to 75°C, add an initiator (potassium persulfate or ammonium persulfate 8.8kg) to initiate the reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature below 88°C. After completion of the reaction, when the temperature dropped to 75° C., 1.1 kg of the second-stage emulsifier allyloxy hydroxypropyl sulfonate, two-stage monomers (220 kg of ethyl acrylate, 220 kg of methyl methacrylate and 660 kg of butyl acrylate) were added, Start the second stage reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature not to exceed 85° C. After the rea...

Embodiment 2

[0012] Add 800kg of soft water, 3.3kg of one-stage emulsifier sodium allyloxy hydroxypropyl sulfonate, one-stage monomer (220kg of ethyl acrylate, 220kg of methyl methacrylate and 660kg of butyl acrylate) in the reactor, close the reactor, and heat up , nitrogen protection, when the temperature rises to 75°C, add an initiator (potassium persulfate or ammonium persulfate 10kg) to initiate the reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature below 88°C. After completion, when the temperature drops to 75°C, add 3.3 kg of the second-stage emulsifier allyloxy hydroxypropyl sulfonate, and the second-stage monomer (220 kg of ethyl acrylate, 220 kg of methyl methacrylate and 660 kg of butyl acrylate), and start Second stage reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature not to exceed 85° C. After the reaction is completed...

Embodiment 3

[0014] Add 800kg of soft water, 5.5kg of one-stage emulsifier sodium allyloxy hydroxypropyl sulfonate, one-stage monomer (220kg of ethyl acrylate, 220kg of methyl methacrylate and 660kg of butyl acrylate) in the reactor, close the reactor, and heat up , nitrogen protection, when the temperature rises to 75°C, add an initiator (potassium persulfate or ammonium persulfate 18kg) to initiate the reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature below 88°C. After completion, when the temperature drops to 75°C, add 5.5 kg of the second-stage emulsifier allyloxy hydroxypropyl sulfonate, the second-stage monomer (220 kg of ethyl acrylate, 220 kg of methyl methacrylate and 660 kg of butyl acrylate), and start Second stage reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature not to exceed 85° C. After the reaction is completed, th...

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Abstract

The invention provides allyloxy hydroxypropyl sodium sulfonate as an emulsifier for a processing aid ACR emulsion polymerization reaction. The allyloxy hydroxypropyl sodium sulfonate is taken as a reactive emulsifier, which can carry out polymerization reaction with the monomer of raw material during the processing aid ACR emulsion polymerization reaction process. The adoption of the reactive emulsifier has following advantages: as the reactive emulsifier has polymerization activity, the carbon-carbon double bond functional group can participate in the emulsion polymerization reaction, the reaction emulsifier not only has the function of a conventional emulsifier but also can be bonded to the surface of polymer particles by a manner of covalent bond and become part of the polymer; therefore, after polymerization, the emulsifier molecules are bonded to the surface of emulsoid particles by a manner of more stable covalent bond and the processing aid ACR emulsion prepared has better stability. Besides, the degree of adhering to a spray tower during the drying process of the processing aid ACR emulsion is reduced and spray drying rate is improved. The degree of fusion between the processing aid ACR and a PVC resin is not affected and the plasticizing time of PVC can be shortened to some extent.

Description

technical field [0001] The invention belongs to the field of PVC processing aids, and in particular relates to the application of a reactive emulsifier in PVC processing aids. Background technique [0002] With the intensification of competition in the processing aid ACR market, manufacturers are making greater efforts to optimize formulas, improve production processes, and strive to improve production efficiency and reduce production costs. The processing aid ACR generally adopts the emulsion polymerization process, and the emulsifier generally adopts a non-reactive emulsifier that does not react with the monomer. In the process of ACR emulsion polymerization, the presence of emulsifier is absolutely indispensable, and it is one of the necessary raw materials for the production of processing aid ACR high molecular polymer. The emulsifier becomes an impurity instead in the finished product. The existence of the emulsifier has disadvantages for the processing aid ACR: it aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F216/14C08F220/14C08F2/26C08L27/06C08L33/08C08L33/12
Inventor 刘春信蔡全国赵立峰朱西堂
Owner SHANDONG RUIFENG CHEM
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