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Preparation method of modified expanded polystyrene

A foamed polystyrene and modified technology, applied in the field of foamed plastics, can solve the problems affecting the performance of flame-retardant expandable polystyrene products, poor compatibility with styrene monomers, and inability of flame retardants to be dispersed uniformly and other problems, to achieve the effect of good chemical corrosion resistance, improved thermal insulation performance, and easy control.

Inactive Publication Date: 2015-05-20
芜湖市京桥精密智造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, flame retardants are often introduced into the polymerization process of expandable polystyrene to modify them, but because the flame retardants cannot be uniformly dispersed in the polymerization system and have poor compatibility with styrene monomers, it is easy to appear Foam shrinkage and collapse, affecting the performance of flame retardant expandable polystyrene products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of a kind of modified expanded polystyrene proposed by the present invention is prepared according to the following process: after adding bis(dioctyl phosphite group) tetraisopropyl titanate into acetone and stirring evenly, then adding carbon nanotubes Ultrasonic dispersion is carried out, and the nucleating agent is obtained after drying, wherein the weight ratio of carbon nanotubes and bis(dioctyl phosphite) tetraisopropyl titanate is 100:1.2; 170 parts of water, 2 parts of hard Add barium fatty acid, 3 parts of active calcium phosphate, 2 parts of pull-off powder, 0.15 parts of defoamer, 0.2 parts of antioxidant, 1.2 parts of flame retardant and 95 parts of styrene into the reaction vessel and stir evenly, then add 0.4 parts in sequence Stir dibenzoyl peroxide, 0.05 parts of tert-butyl peroxybenzoate, 0.3 parts of dicumyl peroxide and 4 parts of nucleating agent evenly, raise the temperature to 90°C, and keep it warm for 4 hours to obtain polys...

Embodiment 2

[0019] The preparation method of a kind of modified expanded polystyrene proposed by the present invention is prepared according to the following process: after adding bis(dioctyl phosphite group) tetraisopropyl titanate into acetone and stirring evenly, then adding carbon nanotubes Carry out ultrasonic dispersion 25min, the power of ultrasonic dispersion is 580w, the frequency of ultrasonic dispersion is 1MHz, after drying, obtain nucleating agent, wherein the weight ratio of carbon nanotubes and di(dioctyl phosphite) tetraisopropyl titanate is 50:0.7; By weight, 155 parts of water, 3.4 parts of barium stearate, 1.5 parts of active calcium phosphate, 7 parts of pulling powder, 0.07 part of defoamer, 0.4 part of antioxidant, 0.8 part of flame retardant and 102 Add 1,000,000,000,000,000,000,000, and 1,000,000,000,000,000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,00,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,00,0,0,0,0,0,0,0,0,0 of, and 0,000 parts of dicumyl peroxid...

Embodiment 3

[0021] The preparation method of a kind of modified expanded polystyrene proposed by the present invention is prepared according to the following process: after adding bis(dioctyl phosphite group) tetraisopropyl titanate into acetone and stirring evenly, then adding carbon nanotubes Ultrasonic dispersion is carried out, and the nucleating agent is obtained after drying, wherein the weight ratio of carbon nanotubes and bis(dioctyl phosphite) tetraisopropyl titanate is 100:1.6; 150 parts of water, 4 parts of hard Add barium fatty acid, 1 part of active calcium phosphate, 8 parts of pull-off powder, 0.05 part of defoamer, 0.5 part of antioxidant, 0.4 part of flame retardant and 105 parts of styrene into the reaction vessel and stir evenly, then add 0.3 parts in sequence Stir dibenzoyl peroxide, 0.1 part of tert-butyl peroxybenzoate, 0.2 part of dicumyl peroxide and 8 parts of nucleating agent evenly, raise the temperature to 90°C, and keep it warm for 3 hours to obtain polystyrene...

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Abstract

The invention discloses a preparation method of modified expanded polystyrene. The preparation method of the modified expanded polystyrene comprises the following steps: adding di(dioctyl phosphite) tetraisopropyl titanate into acetone, uniformly stirring, then adding carbon nano tubes for carrying out ultrasonic dispersion, and drying to obtain a nucleating agent; adding water, barium stearate, activated calcium phosphate, nekal, a defoaming agent, an antioxidant, a flame retardant and styrene into a reaction container, uniformly stirring, then sequentially adding dibenzoyl peroxide, tert-butyl peroxybenzoate, dicumyl peroxide and the nucleating agent, uniformly stirring, heating up to the temperature of 90 DEG C, and carrying out heat preservation for 3-4 hours, so that polystyrene is obtained; adding liquid butadiene-acrylonitrile rubber and melamine formaldehyde resin into a reaction container containing polystyrene, heating up to the temperature of 100-110 DEG C, uniformly stirring, adding a foaming agent, and carrying out heat preservation for 3-4 hours, wherein pressure in a heat preservation process is 1-1.2MPa; and cooling to room temperature, and filtering, so that the modified expanded polystyrene is obtained.

Description

technical field [0001] The invention relates to the technical field of foamed plastics, in particular to a preparation method of modified foamed polystyrene. Background technique [0002] Expanded polystyrene resin is a foam material with excellent low density and thermal insulation properties. Expanded polystyrene resin is widely used. Due to its high strength, light weight, excellent thermal insulation performance and high energy absorption capacity, it can be used as packaging materials for various valuables, precision instruments and vegetables and fruits; and because of its Low thermal conductivity, low water absorption, electrical insulation, sound insulation, moisture resistance, and simple molding process are widely used in roadbed laying of roads and bridges, building construction, and insulation materials in the refrigeration industry. [0003] The structure of expanded polystyrene is characterized by a large specific surface area, and the internal structure of th...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L9/02C08L61/28C08F112/08C08F4/34C08K13/06C08K9/04C08K7/24C08K3/32C08J9/14
Inventor 彭其周
Owner 芜湖市京桥精密智造有限公司
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