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A kind of preparation method of polyvinylidene chloride copolymer emulsion for flame retardant material

A technology of polyvinylidene chloride and copolymer emulsion, which is applied in the field of polyvinylidene chloride resin, and can solve problems not involved in the production process of polyvinylidene chloride copolymer emulsion

Active Publication Date: 2016-08-17
QUZHOU ZHONGTONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above patents and known technology polyvinylidene chloride emulsion products introduce comonomers for modification, but do not involve the production process of polyvinylidene chloride copolymer emulsions that can be used for flame retardant materials

Method used

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  • A kind of preparation method of polyvinylidene chloride copolymer emulsion for flame retardant material
  • A kind of preparation method of polyvinylidene chloride copolymer emulsion for flame retardant material
  • A kind of preparation method of polyvinylidene chloride copolymer emulsion for flame retardant material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1. Preparation of water phase

[0027] In parts by weight, add 500 parts of pure water and 1 part of emulsifier (preferably 1 part) into the reactor, and stir evenly.

[0028] Step 2. Preparation of oil phase

[0029] Mix the oil phase components in the following proportions in a beaker and stir well.

[0030]

[0031]

[0032] Step 3. Suspension Polymerization

[0033] Add the oil phase solution prepared in the beaker in step 2 to the reaction kettle with the prepared water phase in step 1, stir slowly and then quickly, add 0.07 parts of glacial acetic acid, and then heat up from 60°C for 10 hours, and react After the end, the residual monomer is removed by vacuum desorption method, and the material is filtered and discharged with a stainless steel filter net of 100 mesh or more. get the product. Numbered M-1

Embodiment 2

[0035] In step 2, the weight part of N-cyclohexylmaleimide is 5, and the others are the same as in Example 1. The resulting product number was M-2.

Embodiment 3

[0037] In step 2, the weight part of N-cyclohexylmaleimide is 1, and the others are the same as in Example 1. The resulting product number was M-3.

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Abstract

The invention relates to a preparation method of a polyvinylidene chloride copolymer emulsion for a flame retardant material. The method comprises the following steps: pumping pure water and adding a certain amount of an emulsifier, an initiator, vinylidene chloride, N-cyclohexyl maleimide, 2-fluorostyrene and an unsaturated fatty acid ester monomer into a reaction kettle; and heating to the reaction temperature to realize polymerizing the emulsion to obtain the polyvinylidene chloride copolymer emulsion for the flame retardant material. An N-cyclohexyl maleimide compound ChMI structurally has the steric effect of a pentabasic rigid ring and has a flame retardant performance, and 2-fluorostyrene has an effect of connecting double bonds, so that the ChMI monomer is reacted in form of copolymerization. A fluorine-containing monomer 2-fluorostyrene takes part in polymerization, the fluorine element is guided to a framework of the fluorine-containing copolymer, fluorine atoms in fluorocarbon resin are arranged compactly in an outer layer of a carbon frame, and the chain deficiency of polyvinylidene chloride is optimized, so that the inner part of the main chain is prevented from being radiated by ultraviolet light and corroded by chemical reagents. The monomers are copolymerized to improve the heat resistance of the product and enhance the flame retardance, so that the invention provides the preparation method of the polyvinylidene chloride copolymer emulsion for the flame retardant material.

Description

technical field [0001] The invention relates to a method for polyvinylidene chloride resin, in particular to a preparation method for polyvinylidene chloride copolymer emulsion used for flame retardant materials. technical background [0002] The main component of polyvinylidene chloride (PVDC for short) is vinylidene chloride (VDC). Due to its symmetrical molecular structure and the presence of hydrophobic chlorine, it has high crystallinity and melting point, and is water-resistant and oxygen-resistant. The performance is good, and the gas barrier property is not affected by the ambient humidity. It is widely used in food, medicine, military industry and other fields. The disadvantage is that the thermal stability is poor, and it is easy to decompose and release hydrogen chloride at the processing temperature to form olefin chains, resulting in discoloration of the product. At the same time, these olefin chains form many cross-linked network structures, which are insoluble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/08C08F222/40C08F212/14C08F220/14C08L27/08
Inventor 许益生许丽斯王浩舟
Owner QUZHOU ZHONGTONG CHEM