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A kind of corrosion-resistant polyvinyl chloride resin and preparation method thereof

A polyvinyl chloride resin and corrosion-resistant technology, which is applied in the field of corrosion-resistant polyvinyl chloride resin and its preparation, can solve the problems of deteriorating the chemical resistance of the polyvinyl chloride resin, and achieves ensuring corrosion resistance, improving corrosion resistance, Density-enhancing effect

Active Publication Date: 2021-02-19
江苏新汇烽塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyvinyl chloride resin has good solvent resistance and corrosion resistance, most inorganic acids, alkalis, salts and many non-polar organic solvents, but it will swell or dissolve in some polar solvents; in addition, plasticizing The addition of additives will deteriorate the chemical resistance of polyvinyl chloride resin

Method used

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  • A kind of corrosion-resistant polyvinyl chloride resin and preparation method thereof

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Effect test

Embodiment 1

[0027] A preparation method of corrosion-resistant polyvinyl chloride resin, the specific steps are as follows:

[0028] (1) Dissolve the first dispersant in deionized water, then add the initiator and vinyl chloride monomer, disperse evenly and transfer to the polymerization kettle;

[0029] (2) Add the first part of cross-linking agent and heat to 50°C for polymerization;

[0030] (3) When the conversion rate of vinyl chloride monomer reaches 42%, add silane coupling agent, second dispersant, second part of crosslinking agent, toluene diisocyanate, isophorone diisocyanate, butyl acrylate, benzene peroxide Formyl, heat up to 75°C at a heating rate of 12°C / min for polymerization until the conversion rate of vinyl chloride monomer reaches 85%, end the polymerization, recover unreacted monomers, centrifuge and dry the obtained slurry to obtain polyvinyl chloride resin ;

[0031] (4) Kneading and extruding the polyvinyl chloride resin obtained in step (3) with rock wool and hig...

Embodiment 2

[0042] A preparation method of corrosion-resistant polyvinyl chloride resin, the specific steps are as follows:

[0043] (1) Dissolve the first dispersant in deionized water, then add the initiator and vinyl chloride monomer, disperse evenly and transfer to the polymerization kettle;

[0044] (2) Add the first part of cross-linking agent and heat to 60°C for polymerization;

[0045] (3) When the conversion rate of vinyl chloride monomer reaches 46%, add silane coupling agent, second dispersant, second part of crosslinking agent, toluene diisocyanate, isophorone diisocyanate, butyl acrylate, benzene peroxide Formyl, heat up to 80°C at a heating rate of 15°C / min for polymerization until the conversion rate of vinyl chloride monomer reaches 85%, then end the polymerization, recover unreacted monomers, centrifuge and dry the obtained slurry to obtain polyvinyl chloride resin ;

[0046] (4) kneading and extruding the polyvinyl chloride resin obtained in step (3) with rock wool an...

Embodiment 3

[0057] A preparation method of corrosion-resistant polyvinyl chloride resin, the specific steps are as follows:

[0058] (1) Dissolve the first dispersant in deionized water, then add the initiator and vinyl chloride monomer, disperse evenly and transfer to the polymerization kettle;

[0059] (2) Add the first part of cross-linking agent and heat to 50°C for polymerization;

[0060] (3) When the conversion rate of vinyl chloride monomer reaches 46%, add silane coupling agent, second dispersant, second part of crosslinking agent, toluene diisocyanate, isophorone diisocyanate, butyl acrylate, benzene peroxide Formyl, heat up to 80°C at a heating rate of 12°C / min for polymerization until the conversion rate of vinyl chloride monomer reaches 85%, end the polymerization, recover unreacted monomers, centrifuge and dry the obtained slurry to obtain polyvinyl chloride resin ;

[0061] (4) Kneading and extruding the polyvinyl chloride resin obtained in step (3) with rock wool and hig...

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Abstract

The invention provides a corrosion-resistant polyvinyl chloride resin and a preparation method thereof. The polyvinyl chloride resin is obtained by polymerization reaction of vinyl chloride monomer as a raw material. The two-stage heating polymerization is adopted, and the cross-linking agent is fed twice. Polymerize at a low temperature, then heat up to a higher temperature at a faster heating rate for polymerization, use the polymerization reaction under two temperature conditions to obtain molecular chains of different lengths, promote molecular chain entanglement, and the product has good compactness; toluene diisocyanate , isophorone diisocyanate, butyl acrylate, and benzoyl peroxide can be added to modify and improve the corrosion resistance of the product. The obtained polyvinyl chloride resin is then passed through rock wool and high-silica glass fiber to further improve The corrosion resistance of the product.

Description

technical field [0001] The invention relates to the technical field of resin preparation, in particular to a corrosion-resistant polyvinyl chloride resin and a preparation method thereof. Background technique [0002] The main component of polyvinyl chloride resin is polyvinyl chloride, and its heat resistance, toughness and ductility are generally enhanced by adding other components. It has an extremely wide range of applications, such as in construction, agriculture, chemical industry and other fields. The figure of vinyl chloride resin, its global usage ranks second among all kinds of synthetic materials; [0003] There are five main polymerization processes for the production of polyvinyl chloride PVC in the world, namely suspension method, emulsion method, bulk method, microsuspension and solution polymerization process; among them, the suspension polymerization process has always been the main process of industrial production, most of the homopolymerization and The co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L1/28C08L29/04C08K9/02C08K9/04C08K7/14C08K7/10
CPCC08L27/06C08L2205/03C08L1/284C08L29/04C08K9/02C08K9/04C08K7/14C08K7/10
Inventor 徐红军
Owner 江苏新汇烽塑胶有限公司
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