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Chlorinated polyvinyl chloride resin and preparation method thereof

A technology of chlorinated polyvinyl chloride and resin, which is applied in the chemical industry, can solve the problems of poor chlorination uniformity of chlorinated polyvinyl chloride resin, low product production efficiency, low product comprehensive performance, etc., and achieve the improvement of chlorination reaction efficiency and production Efficiency improvement and response time shortening effects

Active Publication Date: 2019-03-26
山东高信化学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, there are the following problems in the chlorination method of the aqueous suspension method in the prior art: the prepared chlorinated polyvinyl chloride resin has poor chlorination uniformity; thermal stability is not enough; the chlorination conditions are harsh, the reaction time is long, and the production efficiency of the product is low. Low; low comprehensive product performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Chlorinated polyvinyl chloride resin and production method thereof, comprising the following steps: preparation of suspension solution and infiltration of PVC resin, chlorination process, deacidification, neutralization, centrifugal dehydration, and drying

[0043] (1) Preparation of suspension solution and infiltration with PVC resin

[0044] In the batching tank, prepare 4m hydrochloric acid solution with a concentration of 3% (weight ratio) from hydrochloric acid and condensed water 3 , Add 1050kg of PVC resin, 10kg of sodium methacrylate, and 1.2kg of benzoyl peroxide, stir to make a suspension solution, raise the temperature to 80°C, and soak for 30 minutes.

[0045] PVC resin is chlorinated special polyvinyl chloride, the degree of polymerization is 1000, the average particle size is 200μm, and the apparent density is 0.50g / ml.

[0046] (2) Chlorination

[0047] Press the suspended solution into the chlorination kettle, feed nitrogen gas at a pressure of 0.1 MPa...

Embodiment 2

[0058] Chlorinated polyvinyl chloride resin and production method thereof, comprising the following steps: preparation of suspension solution and infiltration of PVC resin, chlorination process, deacidification, neutralization, centrifugal dehydration, and drying

[0059] (1) Preparation of suspension solution and infiltration with PVC resin

[0060] In the batching tank, prepare 20m hydrochloric acid solution with a concentration of 15% (weight ratio) from hydrochloric acid and condensed water 3 , add 3000kg of PVC resin, 15kg of copolymer of ethylene oxide and propylene oxide, 5kg of polyvinylpyrrolidone, 2.8kg of benzoyl peroxide, 1.2kg of hydrogen peroxide, 40kg of talcum powder, stir to make a suspension solution, heat up to 50°C for infiltration, Infiltrate for 10min.

[0061] PVC resin is chlorinated special polyvinyl chloride, the degree of polymerization is 1300, the average particle size is 250μm, and the apparent density is 0.45g / ml.

[0062] (2) Chlorination

[...

Embodiment 3

[0074] Chlorinated polyvinyl chloride resin and production method thereof, comprising the following steps: preparation of suspension solution and PVC resin infiltration, chlorination process, deacidification, neutralization, centrifugal dehydration and drying

[0075] (1) Preparation of suspension solution and infiltration with PVC resin

[0076] In the batching tank, add condensed water 4m 3 , add PVC resin 720kg, dispersant sodium dodecylbenzenesulfonate 2.0kg, polyether surfactant 1.2kg, initiator benzoyl peroxide 3.0kg, azobisisobutyronitrile 1.8kg, stir, prepare Form a suspension solution, raise the temperature to 75°C, and soak for 40 minutes.

[0077] PVC resin is special polyvinyl chloride for chlorination, the degree of polymerization is 800, the average particle size is 180μm, and the apparent density is 0.50g / ml.

[0078] (2) Chlorination

[0079] Press the suspended solution into the chlorination kettle, feed nitrogen gas at a pressure of 0.1 MPa for 40 minutes,...

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Abstract

The invention discloses a chlorinated polyvinyl chloride resin and a preparation method thereof. The preparation method comprises the following steps: a step of suspension preparation and PVC (Polyvinyl Chloride) resin infiltration, a chlorination process step, a deacidification step, a neutralization step, a centrifugation step and a drying step, wherein the chlorination process step is in an anaerobic atmosphere; chlorine is introduced into the chlorination process step according to a chlorination program; and a chlorine introduction manner is to introduce liquid chlorine into the bottom ofa chlorination kettle. The chlorine content of the prepared product chlorinated polyvinyl chloride resin reaches 66-72%, the tensile strength is more than or equal to 50MPa, the Vicat softening temperature is more than or equal to 120 DEG C, and the dynamic thermal stabilization time is more than or equal to 25 minutes. Compared with the prior art, the chlorinated polyvinyl chloride resin disclosed by the invention has the advantages that the Vicat softening temperature is improved by 5-10 DEG C, the dynamic heat resistance is improved by 5-15 minutes, and the comprehensive performance is excellent; the reaction time is shortened, the production efficiency is improved by 25-50%, and the service life of the equipment is prolonged by 50-200%; and hydrochloric acid and condensate water neededin preparation of the suspension come from the chlorination process and the drying process, recycling of the hydrochloric acid is realized, the heat value of the condensate water is effectively utilized, comprehensive utilization of heat and water resources is realized, and the chlorinated polyvinyl chloride resin is energy-saving and environmental-friendly.

Description

technical field [0001] The invention relates to a chlorinated polyvinyl chloride resin and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] In recent years, with the advancement of science and technology, new materials have made great progress in various fields in our country. Chlorinated polyvinyl chloride has broad prospects as a new material. In addition to many excellent properties of polyvinyl chloride, it also has strong corrosion resistance, heat resistance, flame retardancy, high mechanical strength, and good electrical properties. It can replace some traditional thermoplastic engineering plastics within a certain range, and has excellent cost performance. Widely used in chemical industry, building materials, electrical appliances and adhesives and other fields. [0003] The production of CPVC by aqueous phase suspension method is a production method commonly used at present. The method uses water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F14/06C08F8/20
CPCC08F8/20C08F14/06
Inventor 金胜波王曙光韩风凌玉英胡海波侯兰明
Owner 山东高信化学股份有限公司
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