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Uses of methallyl hydroxide sodium dimercaptosulphanate in PVC processing aid

A technology of sodium methallyl oxypropane sulfonate and processing aid, applied in the application field of reactive emulsifier in PVC processing aid, can solve the problem of increasing labor intensity of spray tower, reducing spray drying rate and affecting processing aid. Problems such as the degree of fusion between the agent and the PVC resin

Inactive Publication Date: 2009-04-08
SHANDONG RUIFENG CHEM
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  • 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 methallyl hydroxide sodium dimercaptosulphanate in PVC processing aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 800kg of soft water, one stage of emulsifier sodium methallyl hydroxypropyl sulfonate 1.1kg, one stage of 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 emulsifier sodium methallyl hydroxypropyl sulfonate and 2-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, one section of emulsifier sodium methallyl hydroxypropyl sulfonate 3.3kg, one section of 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 sodium methallyl 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 react...

Embodiment 3

[0014] Add 800kg of soft water, one section of emulsifier sodium methallyl hydroxypropyl sulfonate 5.5kg, one section of monomer (ethyl acrylate 220kg, methyl methacrylate 220kg and butyl acrylate 660kg) in the reactor, close the reactor, 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 sodium methallyl 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 comple...

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Abstract

The invention provides methyl allyl hydroxypropyl sodium sulfonate as an emulsifier for a PVC processing aid ACR emulsion polymerization reaction. The methyl allyl 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 reaction 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 reactive 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): C08F220/18C08F216/04C08F220/14C08F2/26C08L27/06C08L33/08C08L33/12
Inventor 赵立峰蔡全国冯健
Owner SHANDONG RUIFENG CHEM
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