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Preparation method of polyvinyl chloride resin with large particle size and narrow distribution

A technology of polyvinyl chloride resin and narrow distribution, which is applied in the field of polymer materials to achieve the effect of high chlorine content, loose particle structure, and favorable chlorine content

Pending Publication Date: 2021-11-16
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, in order to maintain technology monopoly and high profits, the production of foreign CPVC resins adopts the integrated technology of vinyl chloride-polymerization-chlorination, and no company sells chlorination-specific PVC resin as an intermediate product

Method used

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  • Preparation method of polyvinyl chloride resin with large particle size and narrow distribution
  • Preparation method of polyvinyl chloride resin with large particle size and narrow distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] S1. Mix 100kg vinyl chloride monomer, 0.05kg polyvinyl alcohol with 72% degree of alcoholysis, 0.03kg hydroxypropyl cellulose with 10% hydroxypropyl content, 0.04kg di(2-ethyl)hexyl peroxydicarbonate Ester, 0.05kg sodium bicarbonate, 0.05kg dibutyltin dilaurate and 160kg deionized water were added into the polymerization kettle and mixed evenly. Stir at 20°C for 30 minutes;

[0027] S2, heat up, and carry out the polymerization reaction under the reaction condition of 50° C., and the polymerization time is 1 hour;

[0028] S3, add 100kg vinyl chloride monomer, 0.02kg polyvinyl alcohol with 72% alcoholysis degree, 0.01kg hydroxypropyl cellulose with 10% hydroxypropyl content, 0.02kg di(2-ethyl) peroxydicarbonate Hexyl ester, 160kg deionized water, polymerized under the reaction conditions of 60°C, the polymerization time was 2 hours;

[0029] S4, adding 0.1kg bisphenol A terminator to terminate the polymerization reaction;

[0030] S5. The above resin slurry is stripp...

Embodiment 2

[0033] S1. Mix 100kg vinyl chloride monomer, 0.05kg polyvinyl alcohol with 78% degree of alcoholysis, 0.03kg hydroxypropyl cellulose with 10% hydroxypropyl content, 0.05kg di(2-ethyl)hexyl peroxydicarbonate Ester, 0.05kg sodium bicarbonate, 0.05kg dibutyltin dilaurate and 160kg deionized water were added into the polymerization kettle and mixed evenly. Stir at 20°C for 30 minutes;

[0034] S2, heat up, and carry out the polymerization reaction under the reaction condition of 50° C., and the polymerization time is 1 hour;

[0035] S3, add 100kg vinyl chloride monomer, 0.02kg polyvinyl alcohol with 78% alcoholysis degree, 0.01kg hydroxypropyl cellulose with 10% hydroxypropyl content, 0.02kg di(2-ethyl) peroxydicarbonate Hexyl ester, 160kg deionized water, polymerized under the reaction conditions of 60°C, the polymerization time was 2 hours;

[0036] S4, adding 0.1kg bisphenol A terminator to terminate the polymerization reaction;

[0037] S5. The above resin slurry is stripp...

Embodiment 3

[0040] S1. Mix 100kg vinyl chloride monomer, 0.05kg polyvinyl alcohol with 78% degree of alcoholysis, 0.03kg hydroxypropyl cellulose with 10% hydroxypropyl content, 0.02kg di(2-ethyl)hexyl peroxydicarbonate Ester, 0.05kg sodium bicarbonate, 0.05kg dibutyltin dilaurate and 160kg deionized water were added into the polymerization kettle and mixed evenly. Stir at 20°C for 30 minutes;

[0041] S2, heat up, and carry out the polymerization reaction under the reaction condition of 50° C., and the polymerization time is 2 hours;

[0042] S3, add 100kg vinyl chloride monomer, 0.02kg polyvinyl alcohol with 78% alcoholysis degree, 0.01kg hydroxypropyl cellulose with 10% hydroxypropyl content, 0.02kg di(2-ethyl) peroxydicarbonate Hexyl ester and 160kg deionized water were polymerized under the reaction conditions of 60°C, and the polymerization time was 2 hours;

[0043] S4, adding 0.1kg bisphenol A terminator to terminate the polymerization reaction;

[0044] S5. The above resin slur...

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Abstract

The invention provides a preparation method of polyvinyl chloride resin with large particle size and narrow distribution, and the polyvinyl chloride resin with large particle size and narrow distribution is prepared through two-stage polymerization reaction by using a suspension method production process. Through two-stage polymerization, the particle size of the polyvinyl chloride resin is effectively increased, and meanwhile, the particle size distribution is reduced, so that the prepared polyvinyl chloride resin has the characteristics of large particle size (D50 is more than or equal to 180 microns) and narrow distribution (span is less than or equal to 1.0), the particle structure is loose, and the plasticizer oil absorption rate is high. When the polyvinyl chloride resin produced by the method is used as the special PVC resin for chlorination for preparing the CPVC resin, the increase of the chlorine content of the CPVC resin in a chlorination reaction and the improvement of the chlorination uniformity are very facilitated, and the prepared CPVC resin is relatively high in chlorine content and can be applied to the production of the CPVC resin.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of polyvinyl chloride resin with large particle size and narrow distribution. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) resin introduces chlorine atoms into the molecular structure of PVC resin through chlorination reaction, increasing the chlorine content from 56% of ordinary PVC resin to 61%~75%. The increase of chlorine content improves the performance of PVC resin, making it have good chemical corrosion resistance, flame retardancy and insulation, and the heat resistance is much better than PVC resin, so that CPVC resin can be used in chemical industry , Building materials, metallurgy, shipbuilding, electrical appliances and adhesives. [0003] The preparation of CPVC resin requires the use of special chlorinated special PVC resin. The development of chlorinated special PVC resin is one of the difficulties...

Claims

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Application Information

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IPC IPC(8): C08F114/06C08F2/20
CPCC08F114/06C08F2/20
Inventor 张文学史万敬贾小军苏峰刘元戎裴英鸽朱睿杰袁晓霞张斌山屈智财韩文静
Owner JINCHUAN GROUP LIMITED
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