Compound flame-retardant polystyrene granules and method for preparing same

A technology of polystyrene particles and polystyrene, which is applied in the field of new materials, can solve the problems of large waste water pollution in the production process, unsatisfactory graphite dispersion, and low production efficiency, and achieve diversified formulas, space saving, and high production efficiency. Effect

Inactive Publication Date: 2016-06-08
南京法宁格节能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production method is an intermittent production method, which has a large production energy consumption, low production efficiency, unsatisfactory dispersion of graphite in raw materials, and large waste water pollution in the production process.

Method used

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  • Compound flame-retardant polystyrene granules and method for preparing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Raw materials: select the polystyrene raw material with a melt index range of 5.05g / 10min. The polystyrene is a model of 158K polystyrene produced by Yangzi BASF Company. The graphite masterbatch is 600 mesh natural flake graphite, which is flame retardant The agent is hexabromododecane, and the physical foaming agent is pentane;

[0032] (2) Through the weightless multi-component feeding system, the feeding amount of each component is precisely controlled, and according to the predetermined production formula, the feeding amount of polystyrene resin is set to 81 parts by weight, and the amount of flame retardant is 5 parts by weight, graphite masterbatch is 7 parts by weight.

[0033] (3) Set the working temperature of each part of the extruder system: the barrel temperature is 180°C, 180°C, 175°C, 175°C, 170°C, 165°C, set the temperature of the connecting section between the extruder and the heat exchanger 160°C, set the heat exchanger temperature to 140°C;

[0...

Embodiment 2

[0040] (1) Raw material preparation: select the polystyrene of HIPS6075 model produced by Hong Kong Dow, the graphite masterbatch is 800 mesh natural flake graphite, the flame retardant is hexabromododecane, and the physical foaming agent adopts butane;

[0041] (2) Through the loss-in-weight multi-component feeding system, accurately control the feeding amount of each component, according to the predetermined production formula, set the amount of polystyrene resin to 100 parts by weight, and the amount of flame retardant to 3 Parts by weight, the amount of graphite masterbatch is 10 parts by weight;

[0042] (3) Set the working temperature of each part of the extruder system: the barrel temperature is 180°C, 180°C, 175°C, 175°C, 170°C, 165°C, set the temperature of the connecting section between the extruder and the heat exchanger 160°C, set the heat exchanger temperature to 140°C;

[0043] (4) Adjust the pressure of the extruder system, then start to inject 5 parts by weigh...

Embodiment 3

[0046] (1) Prepare materials: select the polystyrene of HIPS6075 model produced by Hong Kong Dow, the graphite masterbatch is 700 mesh natural flake graphite, the flame retardant is hexabromododecane, and the physical foaming agent adopts the mixture of carbon dioxide and nitrogen;

[0047] (2) Through the weightless multi-component feeding system, the feeding amount of each component is precisely controlled, and according to the predetermined production formula, the amount of polystyrene resin is set to 70 parts by weight, and the amount of flame retardant is 70 parts by weight. Parts by weight, the amount of graphite masterbatch is 5 parts by weight;

[0048](3) Set the working temperature of each part of the extruder system: the barrel temperature is 180°C, 180°C, 175°C, 175°C, 170°C, 165°C, set the temperature of the connecting section between the extruder and the heat exchanger 160°C, set the heat exchanger temperature to 140°C;

[0049] (4) Adjust the pressure of the ex...

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Abstract

The invention belongs to the technical field of novel materials, and particularly relates to compound flame-retardant polystyrene granules and a method for preparing the same. The compound flame-retardant polystyrene granules comprise, by weight, 70-100 parts of polystyrene, 5-10 parts of foaming agents, 3-7 parts of flame retardants and 5-10 parts of graphite master batch. The method includes (1), mixing the polystyrene, the flame retardants and the graphite master batch with one another in a feeding system; (2), sufficiently melting and mixing materials of various components with one another under the shearing actions of a twin-screw extruder; (3), injecting the foaming agents into the twin-screw extruder; (4), granulating melt at mold plates of an underwater granulator; (5), sieving granulated polystyrene granules by the aid of a vibrating sieving machine, and classifying, weighing and packaging the sieved granules. The compound flame-retardant polystyrene granules and the method have the advantages that technological parameters can be adjusted, so that graphite can adapt to different component proportions without being pre-treated, and heat conductivity coefficients of the compound flame-retardant polystyrene granules can be effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a composite flame-retardant polystyrene particle and a preparation method thereof. Background technique [0002] So far, most of the literature reports on expandable graphite polystyrene are chemical synthesis methods, in which graphite particles are coated in the emulsion during the emulsion synthesis process through styrene, from the polymerization process or after the polymerization is completed to the reaction system Pentane is introduced into the medium and diffused into the polystyrene particles to form expandable graphite polystyrene particles. Since graphite is an inorganic material, the compatibility with organic polystyrene has a great influence on the content of graphite in its products. The production of expandable graphite polystyrene by this method also requires chemical treatment of graphite so that it has better dispersibility in styrene emulsio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L51/04C08K5/02C08K3/04C08J9/14C08J9/12B29C47/92B29C48/92
CPCC08K5/02B29C48/92B29C2948/92704C08J9/122C08J9/141C08J2325/06C08J2351/04C08K3/04C08K2201/005C08L2201/02C08L2203/14C08L25/06C08L51/04
Inventor 郭鑫齐许鹏
Owner 南京法宁格节能科技股份有限公司
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