Process for preparating medical polyvinyl chioride resin with high polymerization

A polyvinyl chloride resin, high degree of polymerization technology, applied in the direction of pipes, etc., can solve the problems of high residual vinyl chloride content and poor thermal stability, and achieve the effect of regular particle shape, easy plasticization, and concentrated resin particle size distribution

Inactive Publication Date: 2005-08-24
上海天原集团天原化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a preparation method of medical high-polymerization polyvinyl chloride resin, t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] 14 kg of vinyl chloride monomer, 0.18 kg of diethylhexyl peroxide dicarbonate, cumene peroxide neodecanoate content of 10-50% water emulsion, 0.02 kg of high alcoholysis polyvinyl alcohol, medium Alcoholysis degree polyvinyl alcohol and low alcoholysis degree polyvinyl alcohol, 0.06 kg of additives and 25.2 kg of water are added to the polymerization kettle. There are 2 baffles in the kettle, the stirring speed is 360 rpm, and the temperature is 39 ℃ After reacting for 10-12 hours, adding 0.03 kg of terminator, an aqueous suspension of medical polyvinyl chloride resin with high degree of polymerization can be obtained, the unreacted vinyl chloride monomer is removed, and the finished product is obtained by centrifugal dehydration and drying.

Example Embodiment

[0019] Example 2

[0020] Combine 14 kilograms of vinyl chloride monomer, 0.30 kilograms of water emulsion with 10-50% diethylhexyl peroxydicarbonate content, 0.018 kilograms of high alcoholysis polyvinyl alcohol and medium alcoholysis polyvinyl alcohol, and 0.06 kilograms of additives Add 25.2 kilograms of water to the polymerization kettle, set 2 baffles in the kettle, stir at 360 rpm, react for 12 to 14 hours at a temperature of 35°C, add 0.03 kg of terminator to obtain medical high polymerization The aqueous suspension of polyvinyl chloride resin is removed from the unreacted vinyl chloride monomer, centrifuged and dried to obtain the finished product.

Example Embodiment

[0021] Example 3

[0022] 14 kg of vinyl chloride monomer, 0.18 kg of diethylhexyl peroxide dicarbonate, cumene peroxide neodecanoate, and tert-butyl peroxide neodecanoate containing 10-50% aqueous emulsion, 0.02 kg High alcoholysis degree polyvinyl alcohol and low alcoholysis degree polyvinyl alcohol, 0.06 kg of additives and 25.2 kg of water are added to the polymerization kettle. There are 2 baffles in the kettle. The stirring speed is 360 rpm and the temperature is 42°C. After reacting for 8-10 hours, adding 0.03 kg of terminator, an aqueous suspension of medical high-polymerization polyvinyl chloride resin can be obtained, the unreacted vinyl chloride monomer is removed, and the finished product is obtained by centrifugal dehydration and drying.

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PUM

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Abstract

A process for preparing the medical polyvinyl chloride resin with high polymerization degree includes such steps as adding vinyl chloride, trigger, disperser, assistant and water to reactor, polymerizing reaction, adding reaction-stopping agent, removing excessive vinyl chloride, centrifugal dewatering and drying.

Description

technical field [0001] The invention relates to a preparation method of polyvinyl chloride resin, in particular to a preparation method of medical high-polymerization polyvinyl chloride resin used in the production of disposable blood transfusion (liquid) film bags, catheters, droppers and other medical accessories . Background technique [0002] Polyvinyl chloride (PVC) resin is one of the five general-purpose plastics. It has a wide range of uses and a large output. According to statistics, it is the second largest variety after polyethylene in the world. The production capacity of PVC resin in my country accounts for the world's total production capacity. About 8% of the capacity is expected to reach 4 million tons in 2004. [0003] In the processing of PVC resin, due to the many defects of ordinary PVC resin, its application in high-end products is restricted. HPVC (highly polymerized PVC resin) was first successfully developed in Japan in the 1960s. After the 1980s, ma...

Claims

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Application Information

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IPC IPC(8): A61L29/04C08F2/20C08F4/34C08F114/06
Inventor 林宝春俞昉
Owner 上海天原集团天原化工有限公司
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