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Flame-retarded expandable polystyrene copolymer

A technology of expandable polystyrene and copolymers, applied in the field of expandable polystyrene, can solve the problems of flame retardants not being uniformly dispersed, foam shrinkage and collapse, and poor compatibility, so as to avoid foam shrinkage and collapse , Improve heat resistance, increase the effect of flame retardant ability

Inactive Publication Date: 2014-09-17
ZHEJIANG QUZHOU WANNENGDA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The flame-retardant expandable polystyrene products of the above patents and known technologies are all modified by introducing a flame retardant during polymerization, but because the flame retardant cannot be dispersed uniformly in the polymerization system, the compatibility with styrene monomer is poor. Prone foam shrinkage and collapse affect the performance of flame retardant expandable polystyrene products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1. Preparation of water phase

[0020] In a 2 cubic meter reactor, add 800Kg of pure water and 2Kg of polyvinyl alcohol, and stir evenly.

[0021] Step 2. Preparation of oil phase

[0022] In a 1 cubic meter reactor, add 100Kg styrene monomer, 10Kg vinylidene chloride, 3Kg chlorotrifluoroethylene, 1Kg glycidyl methacrylate, 0.3Kg white oil, 0.3Kg polyethylene wax, and then add 0.2Kg over Benzoyl oxide, stir well.

[0023] Step 3. Polymerization

[0024] Add the prepared oil phase solution in step 2 to the reaction kettle equipped with the prepared water phase in step 1, react at 90°C for 12 hours, remove the residual monomer by vacuum desorption after the reaction, and filter the material. get the product. Numbered M-1.

Embodiment 2

[0026] Step 1. Preparation of water phase

[0027] In a 2 cubic meter reactor, add 500Kg of pure water and 0.5Kg of polyvinyl alcohol, and stir evenly.

[0028] Step 2. Preparation of oil phase

[0029] In a 1 cubic meter reactor, add 100Kg styrene monomer, 5Kg vinylidene chloride, 1Kg chlorotrifluoroethylene, 0.5Kg glycidyl methacrylate, 0.1Kg white oil, 0.1Kg polyethylene wax, and then add 0.05Kg Benzoyl peroxide, stir well.

[0030] Step 3. Polymerization

[0031] Add the prepared oil phase solution in step 2 to the reaction kettle equipped with the prepared water phase in step 1, react at 100°C for 10 h, remove the residual monomer by vacuum desorption after the reaction, and filter the material. get the product. Numbered M-2.

Embodiment 3

[0033] Step 1. Preparation of water phase

[0034] In a 2 cubic meter reactor, add 1000Kg of pure water and 2Kg of polyvinyl alcohol, and stir evenly.

[0035] Step 2. Preparation of oil phase

[0036] In a 1 cubic meter reactor, add 100Kg styrene monomer, 20Kg vinylidene chloride, 5Kg chlorotrifluoroethylene, 2Kg glycidyl methacrylate, 0.5Kg white oil, 0.5Kg polyethylene wax, and then add 0.5Kg over Benzoyl oxide, stir well.

[0037] Step 3. Polymerization

[0038] Add the prepared oil phase solution in step 2 to the reaction kettle equipped with the prepared water phase in step 1, react at 80°C for 15 hours, remove residual monomers by vacuum desorption after the reaction, and filter out the material. get the product. Numbered M-3.

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PUM

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Abstract

The invention discloses a flame-retarded expandable polystyrene copolymer. In a reaction kettle, pure water is filled, a certain amount of a dispersant, an initiator, styrene, vinylidene chloride, trifluorochlor oethylene and glycidyl methacrylate monomers are added, and after the obtained mixture is heated to a reaction temperature, the obtained product is polymerized so as to obtain a product of the invention.

Description

technical field [0001] The invention relates to an expandable polystyrene, in particular to a flame-retardant expandable polystyrene copolymer. technical background [0002] Due to the excellent performance of flame-retardant expandable polystyrene, it is increasingly widely used in the building materials industry. For example, plates made of flame-retardant expandable polystyrene can be used as new color steel building materials, highway foundation bedding and gymnasium construction materials. [0003] CN1200016 discloses a flame-retardant expandable polystyrene particle and its production method. The flame-retardant expandable polystyrene particles can be used in the production of building materials and packaging materials. It is composed of 90-110 parts of styrene, 1.2-4.0 parts of calcium phosphate, 0.08-0.20 parts of buffer, 0.04-0.10 parts of glyceryl monostearate, 0.10-0.30 parts of sodium pyrophosphate, 0.30-0. 0.50 parts of benzoyl peroxide, 0.40-0.60 parts of di...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F214/08C08F214/24C08F220/32
Inventor 王琪宇
Owner ZHEJIANG QUZHOU WANNENGDA SCI & TECH
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