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Polystyrene fire-retardant foam material and prepapration method thereof

A technology for flame retardant foam and polystyrene, which is applied in the field of polystyrene flame retardant foam material and its preparation, can solve the problems of complex preparation method, unsatisfactory flame retardant performance of products, and many components involved in flame retardant polystyrene foam. , to achieve the effect of simple and easy preparation method, low cost and good flame retardant performance

Inactive Publication Date: 2014-11-19
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame-retardant polystyrene foam prepared by these methods involves many components, the preparation method is complicated, and the flame-retardant performance of the product is not ideal.

Method used

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  • Polystyrene fire-retardant foam material and prepapration method thereof
  • Polystyrene fire-retardant foam material and prepapration method thereof

Examples

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preparation example Construction

[0041] The present invention also provides a preparation method of polystyrene flame-retardant foam material, comprising the following steps:

[0042] (a), pre-expanding and curing the expandable polystyrene particles;

[0043] (b) Mix the liquid thermoplastic phenolic resin with the mature expandable polystyrene particles, and vacuumize at 50-70°C for 25-35min;

[0044] (c) Add expanded graphite and mix evenly, vacuumize at 50-70° C. for 1-2 hours, and then foam molding to obtain the final product.

[0045] In the preparation method of the polystyrene flame-retardant foam material provided by the embodiment of the present invention, the expandable polystyrene particles are pre-foamed and matured, mixed evenly with the thermoplastic phenolic resin dissolved in the organic solvent, and part of the organic solvent is removed to increase the Viscosity, then adding expanded graphite, then vacuum drying to completely remove the organic solvent, and finally foaming to prepare polys...

Embodiment 1

[0049] In percent by weight, get the following materials, expandable polystyrene particles 65%, thermoplastic phenolic resin 20%, expanded graphite 15%, wherein, thermoplastic phenolic resin is dissolved with ethanol, and the addition of ethanol is 8% of thermoplastic phenolic resin weight %;

[0050] Pre-expand the expandable polystyrene particles, the pre-expansion temperature is 120°C, the pre-expansion time is 5min, and then aged at room temperature for 24h;

[0051] Mix the liquid thermoplastic phenolic resin with the cured expandable polystyrene particles, and vacuumize at 60°C for 30 minutes;

[0052] Add expanded graphite and mix well, vacuumize at 60°C for 2h, and then foam molding to obtain the final product.

[0053] The measured limit oxygen index value of the final product is 30.5%, and the amount of carbon residue at 400-600 °C measured by thermogravimetric loss is 37.8% of the total mass; and the heat release rate is determined for the final product polystyrene...

Embodiment 2

[0055] In percent by weight, get the following materials, expandable polystyrene particles 85%, thermoplastic phenolic resin 5%, expanded graphite 10%, wherein, thermoplastic phenolic resin is dissolved with acetone and chloroform, and the addition amount of acetone and chloroform is thermoplastic phenolic resin 7% of resin weight;

[0056] Pre-expand the expandable polystyrene particles, the pre-expansion temperature is 105°C, the pre-expansion time is 15min, and then aged at room temperature for 10h;

[0057] Mix the liquid thermoplastic phenolic resin with the cured expandable polystyrene particles, and vacuumize at 60°C for 30 minutes;

[0058] Add expanded graphite and mix well, vacuumize at 60°C for 1.5h, and then foam molding to obtain the final product.

[0059] The measured limiting oxygen index value of the final product is 25.3%, and the amount of carbon residue at 400-600 °C measured by thermogravimetric loss is 20.8% of the total mass; and the heat release rate i...

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Abstract

The invention relates to the field of polystyrene fire-retardant materials, and especially relates to a polystyrene fire-retardant foam material and a preparation method thereof. The polystyrene fire-retardant foam material is prepared from the raw materials of, by weight, 30-85% of expandable polystyrene particles, 5-40% of thermoplastic phenolic resin, and 10-50% of expansion graphite. According to the polystyrene fire-retardant foam material, when the added expansion graphite is heated, the volume thereof is rapidly increased, such that contact among pellets is inhibited. Also, expansion graphite has a good thermal insulation effect, such that internal heat transfer is reduced, polystyrene fire-retardant foam material pellet thermal degradation is inhibited, and material fire-retardant performance can be enhanced. The raw materials act synergetically. All the obtained polystyrene fire-retardant foam materials have limiting oxygen index values higher than 24%. The preparation method is simple and feasible, and cost is low. With the method, material fire-retardant property is effectively improved, and polystyrene fire-retardant foam material char residue amount is improved.

Description

technical field [0001] The invention relates to the field of polystyrene flame-retardant materials, in particular to a polystyrene flame-retardant foam material and a preparation method thereof. Background technique [0002] Polystyrene is easy to process and shape, and has the advantages of transparency, cheapness, rigidity, insulation, and good printability. It can be widely used in the light industry market, daily decoration, lighting instructions, and packaging. Insulation materials and heat insulation materials can be used to make various instrument casings, lampshades, optical and chemical instrument parts, transparent films, capacitor dielectric layers, etc. However, since the limiting oxygen index of polystyrene itself is only 18%, it will degrade and release ethylene monomer, dimer, benzene and low molecular weight alkylbenzene and other combustible substances under high temperature conditions. For its use, in order to improve its combustion properties and expand i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L61/06C08K3/04
Inventor 辛菲钱立军杨溢锴
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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