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Preparation method of composite flame-retardant soft PVC (Polyvinyl Chloride) resin

A PVC resin and composite flame-retardant technology, which is applied in the field of preparation of composite flame-retardant soft PVC resin, can solve problems such as large market demand, limited antimony metal resources, and rising prices of antimony trioxide, so as to improve the flame-retardant effect , excellent mechanical properties and flame retardant properties, the effect of continuous surface

Active Publication Date: 2018-12-07
NORTH CHINA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antimony trioxide can play a flame-retardant role in the gas phase and condensed relative materials at the same time. Only adding antimony trioxide to soft PVC can improve its flame-retardant performance. However, antimony metal resources are limited and the market demand is large, resulting in The price of antimony trioxide keeps rising

Method used

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  • Preparation method of composite flame-retardant soft PVC (Polyvinyl Chloride) resin
  • Preparation method of composite flame-retardant soft PVC (Polyvinyl Chloride) resin
  • Preparation method of composite flame-retardant soft PVC (Polyvinyl Chloride) resin

Examples

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Effect test

Embodiment 1

[0023] A preparation method of a composite flame-retardant soft PVC resin, comprising the following steps:

[0024] (1) After montmorillonite and water are mixed according to the mass ratio of 1:2, slowly add ammoniacal liquor with a mass fraction of 25% to it, when the pH of the mixed solution is 8, add ferric nitrate thereto, and After the temperature of the mixture rises to 75°C, heat preservation and continuous stirring for 20 hours, centrifuge, wash the precipitate, and perform drying treatment. The temperature during the precipitation drying treatment is 105°C, and the drying treatment time is 24 hours. Modified montmorillonite, wherein every gram of montmorillonite adds 15mmol ferric nitrate;

[0025] (2) Put the modified montmorillonite in sulfuric acid solution, soak it for 8 hours, dry it, grind it to an average particle size of 200 mesh, sieve it, and finally calcinate it at 550°C for 4 hours to obtain iron Super acid, wherein the temperature during drying treatmen...

Embodiment 2

[0028] A preparation method of a composite flame-retardant soft PVC resin, comprising the following steps:

[0029] (1) After montmorillonite and water are mixed according to the mass ratio of 1:3, slowly add ammoniacal liquor with a mass fraction of 27% to it, when the pH of the mixed solution is 9, add ferric nitrate thereto, and After the temperature of the mixture rises to 78°C, heat preservation and continuous stirring treatment for 22 hours, centrifuge, wash the precipitate, and perform drying treatment. The temperature during the precipitation drying treatment is 110°C, and the drying treatment time is 24 hours. Modified montmorillonite, wherein every gram of montmorillonite adds 20mmol ferric nitrate;

[0030] (2) Put the modified montmorillonite in sulfuric acid solution, soak for 10 hours, dry, grind to an average particle size of 220 mesh, sieve, and finally calcined at 600°C for 5 hours to obtain iron super acid, wherein the drying temperature is 80°C, and the dry...

Embodiment 3

[0033] A preparation method of a composite flame-retardant soft PVC resin, comprising the following steps:

[0034] (1) after montmorillonite and water are mixed according to the mass ratio of 1:5, slowly add the ammoniacal liquor that mass fraction is 28% to wherein, when the pH of mixed solution is 10, add ferric nitrate wherein, will After the temperature of the mixture rises to 80°C, heat preservation and continuous stirring for 24 hours, centrifuge, wash the precipitate, and perform drying treatment. The temperature during the precipitation drying treatment is 115°C, and the drying treatment time is 24 hours. Modified montmorillonite, wherein every gram of montmorillonite adds 25mmol ferric nitrate;

[0035] (2) Put the modified montmorillonite in sulfuric acid solution, soak for 12 hours, dry, grind to an average particle size of 250 mesh, sieve, and finally calcined at 650°C for 6 hours to obtain iron super acid, wherein the temperature during the drying treatment is 8...

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Abstract

The invention discloses a preparation method of a composite flame-retardant soft PVC (Polyvinyl Chloride) resin. The preparation method comprises the following operation steps of: (1) after mixing montmorillonite and water, slowly adding ammonia water and ferric nitrate into the mixture, after insulation and continuous stirring treatment, centrifuging, washing precipitates, carrying out drying treatment and preparing modified montmorillonite; (2) placing the modified montmorillonite into sulfuric acid solution, carrying out soaking treatment, drying, grinding, sieving, calcining and preparingmontmorillonite superacid; (3) uniformly mixing and stirring PVC resin, dioctyl phthalate, a stabilizer, a lubricant, the montmorillonite superacid and antimony trioxide, mixing, carrying out hot pressing, after standing, preparing the composite flame-retardant PVC resin. The preparation method disclosed by the invention has the beneficial effects that the use amount of the antimony trioxide can be effectively reduced, and the flame-retardant property of the soft PVC resin can be improved.

Description

technical field [0001] The invention belongs to the technical field of PVC resin preparation, and in particular relates to a preparation method of composite flame-retardant soft PVC resin. Background technique [0002] Polyvinyl chloride (PVC) is a kind of thermoplastic with a long history, and it is also the second largest general-purpose plastic in the world. It is widely used in various fields with excellent cost performance. By adding different amounts of plasticizers to it, it can be made into soft, hard and semi-rigid PVC products, and can also be blended with other polymers for modification to make a wide variety of PVC products with different properties. Has a very wide range of applications. The chlorine content of PVC itself can reach up to 56%, and the oxygen index (LOI) can reach as high as 45%-49%. Rigid PVC itself is self-extinguishing. Quality PVC, in order to improve its processing performance, plasticity and reduce its hardness, a large amount of extremely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/02C08K3/34C08K5/12C08K3/22
CPCC08K3/2279C08K3/346C08K5/12C08K9/02C08K13/06C08L2201/02C08L2203/18C08L27/06
Inventor 高明王雨欣陈飞陈学习
Owner NORTH CHINA INST OF SCI & TECH
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