A kind of preparation method of aqueous phase suspension method cpvc resin

A technology of CPVC resin and PVC resin, which is applied in the field of preparation of CPVC resin by aqueous phase suspension method, can solve the problems of weakening the absorption capacity of CPVC resin additives, poor plasticization uniformity of CPVC resin, insufficient physical and mechanical properties, etc., and achieve good processing performance , good stability and easy plasticization

Active Publication Date: 2020-07-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, it hinders the deep chlorination of the resin and the uniformity of chlorination, causing defects in the structure of CPVC resin; on the other hand, it weakens the absorption capacity of CPVC resin additives, making the plasticization uniformity of CPVC resin poor, difficult to process, and the product is rough and dull , there are deficiencies in physical and mechanical properties

Method used

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  • A kind of preparation method of aqueous phase suspension method cpvc resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 80kg of deionized water into a 100L chlorination reaction kettle, and evenly spray 167g of glycerol aqueous solution with a mass ratio of 30% on the surface of 10kg of chlorinable PVC special resin QS-C65, and then add it to the chlorination reaction kettle , start the stirring device, PVC resin is quickly and evenly suspended in the water phase, add 125g of peroxydicarbonate with a concentration of 40%, use chlorine gas to discharge the air in the kettle, heat up the reaction kettle, slowly feed chlorine gas, and the temperature of the reaction kettle reaches 85°C When it is around, the chlorination reaction accelerates. Control the temperature of the reactor at 95°C, the rate of chlorine flow at 50g / min, and the pressure of the reactor at 0.2-0.4MPa. When the amount of chlorine flow reaches 6.8kg, stop the flow of chlorine and add a terminator with a concentration of 20%. 200g of diethylhydroxylamine, after 10 minutes, vacuumize to remove residual chlorine, cool do...

Embodiment 2

[0027] Add 80kg of deionized water into a 100L chlorination reaction kettle, and evenly spray 600g of glycerol aqueous solution with a mass ratio of 10% on the surface of 10kg of chlorinable PVC special resin QS-C65, and then add it to the chlorination reaction kettle , start the stirring device, the PVC resin is quickly and evenly suspended in the water phase, add 150g of peroxydicarbonate with a concentration of 40%, use chlorine gas to discharge the air in the kettle, heat up the reactor, slowly feed chlorine gas, and the temperature of the reactor reaches 85°C At about 100°C, the chlorination reaction accelerates, the temperature of the reactor is controlled at 100°C, the rate of chlorine flow is 50g / min, the pressure of the reactor is maintained at 0.2-0.4MPa, and when the amount of chlorine flow reaches 6.8kg, the flow of chlorine is stopped and a terminator with a concentration of 20% is added 200g of diethylhydroxylamine, after 10 minutes, vacuumize to remove residual c...

Embodiment 3

[0029] Add 80kg of deionized water into a 100L chlorination reaction kettle, and evenly spray 129g of glycerin aqueous solution with a mass ratio of 70% on the surface of 15kg of chlorinable PVC special resin QS-C65, and then add it to the chlorination reaction kettle , start the stirring device, the PVC resin is quickly and evenly suspended in the water phase, add 150g of peroxydicarbonate with a concentration of 40%, use chlorine gas to discharge the air in the kettle, heat up the reactor, slowly feed chlorine gas, and the temperature of the reactor reaches 85°C At about 100°C, the chlorination reaction accelerates, the temperature of the reactor is controlled at 100°C, the rate of chlorine flow is 50g / min, the pressure of the reactor is maintained at 0.2-0.4MPa, and when the amount of chlorine flow reaches 6.8kg, the flow of chlorine is stopped and a terminator with a concentration of 20% is added 200g of diethylhydroxylamine, after 10 minutes, vacuumize to remove residual c...

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Abstract

The invention discloses a CPVC resin preparation method by using a water phase suspension method, and belongs to the technical field of chemical raw materials. The preparation method is characterized in that the preparation steps comprise uniformly spraying a polyhydric alcohol aqueous solution on the surface of PVC resin by using a spraying device; then uniformly suspending the PVC resin which is sprayed with the polyhydric alcohol into a deionized water polymerizing kettle; adding an initiating agent and introducing chlorine gas for chlorination reaction; after the finish of introducing the chlorine gas, adding a chain terminating agent to stop the reaction; and performing washing and drying to obtain a product. The preparation method provided by the invention aims at the characteristics of CPVC resin production process by using the water phase suspension method, gives up the use of dispersing agents, first performs surface activating treatment on the PVC resin by using the polyhydric alcohol, and then performs the chlorination reaction. The prepared CPVC resin has high chlorine content and aging whiteness, has a good stability property, is easy to plasticize uniformly, and has good processability. As a chemical raw material, the CPVC resin can be widely used in preparing various products such as tubular materials, board materials, sectional materials, sheet materials, injection molded parts, foam materials and the like.

Description

technical field [0001] The invention discloses a method for preparing CPVC resin by an aqueous phase suspension method, which belongs to the technical field of chemical raw materials. Background technique [0002] CPVC resin is an important polymer material. According to different dispersion media, there are three main production methods of CPVC: solvent method, solid phase method and aqueous phase suspension method. Affected by environmental protection, energy consumption, process, etc., solvent method has been Basically eliminated. At present, domestic CPVC resins have two production methods: solid phase method and water phase suspension method, and the water phase suspension method is the main method. Internationally famous CPVC manufacturers all use this method as the main method. The specific steps of the traditional water-phase suspension method CPVC resin production process are as follows: suspend the PVC resin in water or hydrochloric acid solution, add initiator and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/06C08F8/22C08F8/00
CPCC08F8/22C08F8/00C08F14/06
Inventor 张学明贾小波孔秀丽肖恩琳李长春张强许永森孙丽朋
Owner CHINA PETROLEUM & CHEM CORP
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