Uses of allyloxy hydroxide sodium dimercaptosulphanate in transparent MBS resin for PVC

A transparent technology of sodium allyloxy hydroxypropyl sulfonate, applied in the application field of reactive emulsifiers in MBS resins, can solve the problem of aggravating the severity of MBS resins, affecting the stability of MBS intermediate emulsions, and reducing the rate of spray drying And other issues

Active Publication Date: 2011-01-12
SHANDONG RUIFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the polymerization process of MBS resin, the existence of emulsifier is absolutely indispensable, and it is one of the necessary raw materials for the production of MBS resin. However, when the intermediate emulsion is spray-dried to obtain a powdery finished product, the emulsifier becomes In addition to impurities, the presence of emulsifiers has disadvantages for MBS resins: affecting the stability of the MBS intermediate emulsion, affecting the transparency of the MBS resin powder itself, and affecting the degree of fusion between MBS and PVC resin
It affects the wall-sticking performance of transparent PVC during extrusion, aggravates the severity of MBS resin sticking in 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 transparent MBS resin for PVC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 840 kg of soft water, a stage of emulsifier sodium allyloxy hydroxypropanesulfonate 2.08 kg, and a stage of monomers (416 kg of methyl methacrylate, 936 kg of styrene and 728 kg of butadiene) into the reactor. The reactor is closed and the temperature is raised. Under nitrogen protection, when the temperature rises to 49℃, add initiator (potassium persulfate or ammonium persulfate 20.8kg) to initiate the reaction. After the reaction starts, the temperature rises, turn on the cooling water to control the reaction temperature below 652, and the reaction is completed for one stage After that, when the temperature drops to 50℃, add 2.08kg of the second-stage emulsifier sodium allyloxy hydroxypropanesulfonate and the second-stage monomer (416kg of methyl methacrylate, 936kg of styrene and 728kg of butadiene), and 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 ...

Embodiment 2

[0012] Add 840 kg of soft water, 6.24 kg of sodium allyloxy hydroxypropane sulfonate, a stage of emulsifier, and a stage of monomers (416 kg of methyl methacrylate, 936 kg of styrene and 728 kg of butadiene) into the reactor. The reactor is closed and the temperature is raised. Protected by nitrogen, when the temperature rises to 49℃, add initiator (potassium persulfate or ammonium persulfate 20.8kg) to initiate the reaction. After the reaction starts, the temperature rises, turn on the cooling water to control the reaction temperature below 65℃, one stage reaction After the completion, when the temperature drops to 50℃, add 6.24kg of second-stage emulsifier sodium allyloxy hydroxypropanesulfonate, and second-stage monomers (416kg of methyl methacrylate, 936kg of styrene and 728kg of butadiene). Section reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature to not exceed 65°C. After the reaction is comp...

Embodiment 3

[0014] Add 840 kg of soft water, 10.4 kg of sodium allyloxy hydroxypropane sulfonate, a first stage of monomers (416 kg of methyl methacrylate, 936 kg of styrene and 728 kg of butadiene) into the reactor, close the reactor, and increase the temperature. Protected by nitrogen, when the temperature rises to 49℃, add initiator (potassium persulfate or ammonium persulfate 20.8kg) to initiate the reaction. After the reaction starts, the temperature rises, turn on the cooling water to control the reaction temperature below 65℃, one stage reaction After the completion, when the temperature drops to 50℃, add 10.4kg of the second-stage emulsifier sodium allyloxy hydroxypropanesulfonate and the second-stage monomer (416kg of methyl methacrylate, 936kg of styrene and 728kg of butadiene). Section reaction. After the reaction starts, the temperature rises, and the cooling water is turned on to control the reaction temperature to not exceed 65°C. After the reaction is completed, the temperat...

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Abstract

The invention provides allyloxy hydroxypropyl sodium sulfonate as an emulsifier for an MBS resin 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 MBS resin 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 emulsifiernot 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 MBS intermediate emulsion prepared has better stability. Besides, thedegree of adhering to a spray tower during the drying process of the MBS resin emulsion is reduced, spray drying rate is improved and the labor intensity to cleaning the spray tower by workers is decreased.

Description

Technical field [0001] The invention belongs to the field of MBS resins for transparent PVC, and particularly relates to the application of a reactive emulsifier in MBS resins. Background technique [0002] As the only available impact modifier for transparent PVC, MBS resin is becoming more and more fierce in market competition. Manufacturers are stepping up efforts to optimize formulas, improve production processes, and strive to increase production efficiency and reduce production costs. MBS resin generally adopts emulsion polymerization process, and emulsifier generally adopts non-reactive emulsifier that does not react with monomer. In the process of MBS resin polymerization, the presence of emulsifier is absolutely indispensable, and it is one of the necessary raw materials for the production of MBS resin. However, when the intermediate emulsion is spray-dried to produce a powdery product, the emulsifier becomes In addition to impurities, the presence of emulsifiers has di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F216/14C08F220/14C08F2/26C08L27/06C08F236/06C08L25/08C08L33/12
Inventor 刘春信张海瑜赵立峰朱西堂
Owner SHANDONG RUIFENG CHEM
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