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A flame-retardant and degradable polyphosphazene epoxy resin and its preparation technology

A technology of epoxy resin and polyphosphazene, which is applied in the field of epoxy resin preparation, can solve the problems of flammability, low hygroscopicity and insufficient toughness of epoxy resin, and achieve low hygroscopicity, excellent flame retardancy and flexibility, The effect of the simple preparation process

Active Publication Date: 2020-09-11
山东航橡新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of traditional epoxy resins such as flammability, high moisture absorption and insufficient toughness, improve the flame retardancy of the resin, the toughness of the cured product, heat resistance and low moisture absorption from the structural design, through the redox method, Provides a method for synthesizing a novel flame-retardant and degradable polyphosphazene epoxy resin prepolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Prepare 20g of linear polydichlorophosphazene according to the method of solution polymerization, and then drop 0.0207mol of 2-methallyl alcohol sodium salt and 0.3931mol of pentafluoropentanol sodium salt into polydichlorophosphazene respectively In tetrahydrofuran solution, react at room temperature for 24 hours, use 2000ml water to precipitate the polymer solution, and prepare 2-methallyloxy, 95% pentafluoropentoxy fully substituted poly Phosphazene product. Then take 10 g of the dried product in a three-necked flask, add 80 ml of tetrahydrofuran and stir to dissolve, slowly add 0.3137 g of hydrogen peroxide in an amount twice the molar amount of the unsaturated double bond, and react at 25 ° C for 2 hours, stop heating after the reaction is completed, The temperature of the reaction solution was lowered to room temperature, and then the polymer was precipitated with 1000ml of water, and vacuum-dried in an oven at 50°C for 24 hours to obtain a viscous fluid c...

Embodiment 2

[0027] Step 1: Prepare 20g of linear polydichlorophosphazene according to the method of solution polymerization, and then drop 0.1034mol of 2-methallyl alcohol sodium salt and 0.3103mol of pentafluoropentanol sodium salt into polydichlorophosphazene In tetrahydrofuran solution, react at room temperature for 24 hours, use 2000ml of water to precipitate the polymer solution, and prepare 2-methallyloxy and 75% pentafluoropentoxy fully substituted poly Phosphazene product. Then take 10g of the dried product in a three-necked flask, add 60ml of N,N-dimethylformamide and stir to dissolve, slowly add 3.8885g of peracetic acid which is twice the molar weight of the unsaturated double bond, and react at room temperature for 4 hours , and then the polymer was precipitated with 1000ml of petroleum ether, and vacuum-dried in an oven at 60°C for 24 hours to obtain a molecular weight of 9x10 6 , a solid epoxy group-containing polyphosphazene product with an epoxy value of 0.2557mol / 100g. ...

Embodiment 3

[0030] Step 1: Prepare 20 g of linear polydichlorophosphazene according to the method of solution polymerization, and then drop 0.1241 mol of ethynylmethanol sodium salt and 0.2897 mol of hexafluoroisopropanol sodium salt into polydichlorophosphazene tetrahydrofuran solution respectively , reacted at room temperature for 24 hours, and precipitated the polymer solution with 2000ml of water to prepare a fully substituted polyphosphazene product with 30% ethynylmethoxy and 70% hexafluoroisopropoxy in molar amounts of side groups. Then take 10 g of the dried product in a three-necked flask, add 80 ml of tetrahydrofuran and stir to dissolve, slowly add 3.7521 g of peroxytrifluoroacetic acid 1.5 times the molar weight of the unsaturated triple bond, and react at 0 ° C for 5 hours. The temperature of the reaction solution was returned to room temperature, and then the polymer was precipitated with 1000ml of petroleum ether, and vacuum-dried in an oven at 60°C for 24 hours to obtain a ...

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Abstract

The invention relates to a flame retardant and degradable polyphosphazene epoxy resin and a preparation technology thereof, which relates to the technical field of preparation of epoxy resin. Polyphosphazene containing unsaturated bond and fluoroalkoxy group is prepared by reaction of polydichlorophosphazene with nucleophilic reagent, then the unsaturated bond is epoxidized by an oxidant to prepare polyphosphazene epoxy resin prepolymer. Finally, the epoxy resin prepolymer is cured with curing agent to obtain the required epoxy resin. So that the fracture form of the prepared epoxy resin showsa certain toughness fracture, and the shortcoming of poor toughness of the cured epoxy resin is solved in structure.

Description

technical field [0001] The invention relates to the preparation of epoxy resin, which belongs to a novel flame-retardant and degradable polyphosphazene-type epoxy resin. The synthesis process of the method is simple, and the prepared resin has good flame retardancy, low hygroscopicity and degradability. Background technique [0002] Epoxy resin is one of the most widely used thermosetting resins. It has good adhesion, corrosion resistance, insulation, high strength and other properties. However, traditional epoxy resin has disadvantages such as flammability and high hygroscopicity. How to improve the performance of epoxy resin Comprehensive performance, expanding its application range is a major topic of applied research. [0003] Polyphosphazene is a kind of polymer material whose main chain is composed of single and double bonds of phosphorus and nitrogen atoms alternately arranged. It has excellent flame retardancy and degradability. Therefore, it is meaningful to develop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/30C08L63/00
CPCC08G59/304C08G2230/00C08L63/00C08L2201/02C08L2201/06C08L2205/025C08L2312/00
Inventor 吴战鹏吴少军张双琨刘伟武德珍张立群邹文奇苗振威
Owner 山东航橡新材料有限公司
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