Microwave radiation melt method chlorination production method of chlorinated polyvinyl chloride (CPVC) resin

A technology of CPVC resin and chlorinated polyvinyl chloride, which is applied in the field of new technology and new polymer materials, and can solve the problems of short chlorination reaction time, high chlorine content, high utilization rate of liquid chlorine, etc.

Inactive Publication Date: 2015-07-08
深圳兰品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The advantages of the present invention are: melt method, microwave accelerated chlorination, chlorination process, and equipment have no special requirements for raw material polyvinyl chloride PVC resin, and can meet the chlorination and chlorination reaction of domestic polyvinyl chloride PVC resin in the international market. The time is short (from the conventional 4 hours to 5-10 minutes), there is basically no degradation and no branching in the chlorination process, and the chlorine content of chlorinated polyvinyl chloride CPVC products is high and the chlorine content is easy to use with screw speed and feeding Quantity control and adjustment, high utilization rate of liquid chlorine, high mechanical properties, high flame retardancy, continuous production, closed system production safety and environmental protection, no similar chlorination production method reported in the world, advanced technology

Method used

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  • Microwave radiation melt method chlorination production method of chlorinated polyvinyl chloride (CPVC) resin
  • Microwave radiation melt method chlorination production method of chlorinated polyvinyl chloride (CPVC) resin

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: Feed 8 kg / min SG8 type polyvinyl chloride PVC resin quantitatively and uniformly in a twin-screw extruder with a diameter of 62, an aspect ratio L / D=64, a set temperature of 110° C., and a rotating speed of 500 rpm. After the material is discharged, use a liquid chlorine booster pump to inject 1 kg / min (a total of 2 kg / min) of liquid chlorine into the 6th and 11th sections of the two main inlets. The extruded product is a white resin, and the measured chlorine content is 60.6 %, the measured viscosity converted into a degree of polymerization is 700;

Embodiment 2

[0037] Embodiment 2: Feed 8 kg / min SG8 type polyvinyl chloride PVC resin quantitatively and uniformly in a twin-screw extruder with a diameter of 62, an aspect ratio L / D=64, a set temperature of 110° C., and a rotating speed of 500 rpm. After the material is discharged, use the liquid chlorine booster pump to inject 1 kg / min (2 kg / min in total) of liquid chlorine into the 6th and 11th sections of the two main inlets, and turn on the microwave radiation at the same time. The power of each magnetron is 1000W. , the power distributed to each waveguide branch is about 200W, the extruded product is a white resin, the measured chlorine content is 73.1%, and the measured viscosity is converted into a degree of polymerization of 710;

Embodiment 3

[0038] Embodiment 3: Feed 8 kg / min SG8 type polyvinyl chloride PVC resin quantitatively and uniformly in a twin-screw extruder with a diameter of 62, an aspect ratio L / D=64, a set temperature of 110° C., and a rotating speed of 600 rpm. After the material is discharged, use the liquid chlorine booster pump to inject 1 kg / min (2 kg / min in total) of liquid chlorine into the 6th and 11th sections of the two main inlets, and turn on the microwave radiation at the same time. The power of each magnetron is 1000W. , the power distributed to each waveguide branch tube is about 200W, the extruded product is a white resin, the measured chlorine content is 68.8%, and the measured viscosity converted into a degree of polymerization is 708;

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Abstract

The invention discloses a microwave radiation melt method chlorination production method of chlorinated polyvinyl chloride (CPVC) resin. The production method comprises the steps of injecting liquid chlorine into molten polyvinyl chloride (PVC) in a double-screw extruder reactor at a high pressure, and feeding microwaves to assist chlorination of the molten polyvinyl chloride (PVC) at the same time, thereby realizing high-quality, high-chlorine-content, low-cost, quick, environment-friendly and continuous production of chlorinated polyvinyl chloride (CPVC) resin. Compared with international commonly-used chlorination methods including an aqueous suspension method and the like at present, the method disclosed by the invention has the advantages that polyvinyl chloride (PVC) resin is subjected to accelerated chlorination by using the microwaves in a molten state, a chlorination process does not have special requirements on the raw material namely the polyvinyl chloride (PVC) resin, the chlorination reaction is performed uniformly, the molecular chains during chlorination are basically not degraded and branched, a product is high in chlorine content which can be easily controlled and adjusted, the chlorination speed is high, the reaction is complete, the product is high in mechanical strength, the chlorine utilization ratio is high, the temperature control is accurate, the production process is green and environment-friendly, scale production can be realized easily, and the like.

Description

technical field [0001] The present invention relates to the technical field of new polymer materials and new techniques, and in particular to a unique production method of chlorinated polyvinyl chloride CPVC resin, that is, the twin-screw extruder is fed with microwaves and simultaneously injected with liquid chlorine to rapidly chlorinate polychlorinated polyvinyl chloride. Melt chlorination method of ethylene PVC resin. Background technique [0002] Polyvinyl chloride (English Poly Vinyl Chloride referred to as PVC) is an important general-purpose thermoplastic resin polymerized from vinyl chloride VCM monomer. From the discovery of vinyl chloride by Regnauk in France in 1835 to the realization of emulsion polymerization by Bitterfeld in 1935 and the creation of suspension polymerization by Goodrich in 1940, the industrial production of polyvinyl chloride began to develop rapidly. At present, the consumption of PVC in the world is second only to polyethylene PE. For quite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F14/06C08F8/20C08L27/24
Inventor 肖金亭任广鸿
Owner 深圳兰品科技有限公司
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