Meta-aramid resin for fibrid, fibrid, aramid paper and synthesis method

A technology for fibrids and synthesis methods, which is applied in the fields of fibrids, aramid paper and synthesis, and meta-aramid resins for fibrids, and can solve the problems of fibrid insulation performance, thermal stability and mechanical strength. And other issues

Active Publication Date: 2021-05-18
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the insulation properties, thermal stability and mechan...

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  • Meta-aramid resin for fibrid, fibrid, aramid paper and synthesis method
  • Meta-aramid resin for fibrid, fibrid, aramid paper and synthesis method

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[0029] The present invention uses isophthaloyl dichloride and m-phenylenediamine as the main raw materials, and 1,1'-binaphthyl-2,2'-diamine as the third monomer, through precondensation, polycondensation, neutralization and nanoscale Wollastonite doping steps to synthesize meta-aramid resin for fibrids. Such as figure 1 , the synthetic method of meta-aramid fiber resin for fibridation of a specific embodiment of the present invention, comprises the following steps:

[0030] a. Precondensation: Under the environment of dry nitrogen protection, dissolve m-phenylenediamine in a polar solvent at room temperature, the concentration of m-phenylenediamine is 0.6-0.7mol / L, and then add a certain amount of 1,1 Stir the '-binaphthyl-2,2'-diamine until it is completely dissolved to a concentration of 0.1 to 0.2 mol / L, and cool the solution to -9°C to -3°C. Add isophthaloyl chloride in an amount of 75-90% of m-phenylenediamine in batches, control the reaction temperature below 30°C, an...

Embodiment 1

[0036] The synthetic method of meta-aramid fiber resin for the precipitated fiber of the present embodiment comprises the following steps:

[0037] a. Precondensation: Under the environment of dry nitrogen protection, dissolve m-phenylenediamine in N,N-dimethylacetamide (DMAC) at room temperature, so that the concentration of m-phenylenediamine is 0.6mol / L, After stirring until it is completely dissolved, add a certain amount of 1,1'-binaphthyl-2,2'-diamine and stir until it is completely dissolved, so that the concentration is 0.1mol / L, and the solution is cooled to -9°C. Add isophthaloyl chloride in an amount of 85% m-phenylenediamine in batches, control the reaction temperature below 30°C, and react for 1.5 hours;

[0038] b. Polycondensation: add isophthaloyl chloride with an addition amount of 15% m-phenylenediamine in batches to the system in step a, stir rapidly, the reaction system gels, control the reaction temperature at 45°C to 55°C, and the reaction time is 1h ; ...

Embodiment 2

[0043] The synthetic method of meta-aramid fiber resin for the precipitated fiber of the present embodiment comprises the following steps:

[0044] a. Precondensation: Under the environment of dry nitrogen protection, dissolve m-phenylenediamine in N,N-dimethylacetamide (DMAC) at room temperature, so that the concentration of m-phenylenediamine is 0.7mol / L, After stirring until it is completely dissolved, add a certain amount of 1,1'-binaphthyl-2,2'-diamine and stir until it is completely dissolved, so that the concentration is 0.2mol / L, and the solution is cooled to -3°C. Add isophthaloyl chloride in an amount of 85% m-phenylenediamine in batches, control the reaction temperature below 30°C, and react for 2 hours;

[0045]b. Polycondensation: add isophthaloyl chloride with an addition amount of 15% m-phenylenediamine in batches to the system of step a, stir rapidly, the reaction system gels, control the reaction temperature at 45°C to 55°C, and the reaction time is 1.5 h;

...

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Abstract

The invention discloses meta-aramid resin for fibrid, the fibrid, aramid paper and a synthesis method. Under the protection of inert gas, a part of isophthaloyl dichloride is added in batches into a polar solvent dissolved with m-phenylenediamine and 1,1'-binaphthalene-2,2'-diamine, and carrying out pre-polycondensation; adding the rest isophthaloyl dichloride into a reaction system in batches, increasing a reaction temperature, and carrying out polycondensation; adding a neutralizer into the reaction system to obtain a reaction product; and adding nanoscale wollastonite into the reaction product, and conducting uniform dispersing to obtain the meta-aramid resin. According to the invention, a third monomer, namely 1,1'-binaphthalene-2,2'-diamine is introduced into an aramid fiber rigid chain system, so the viscosity of a final product system is reduced, and production efficiency is effectively improved. The nanoscale wollastonite is added into precipitation resin, so the insulating strength, the thermal stability and the mechanical strength of meta-aramid insulating paper can be improved, and the requirement for long-term safe and stable application in a high-electric-field environment can be met.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a meta-aramid resin for fibrids, fibrids, aramid paper and a synthesis method. Background technique [0002] Meta-aramid insulating paper is mainly made of poly-m-phenylene isophthalamide fibers. Compared with natural cellulose paper, meta-aramid paper has more obvious advantages in terms of thermal stability, mechanical properties and electrical properties, which can greatly improve the safety and service life of electrical appliances. The field of insulation has an irreplaceable important position. With the rapid development of high-voltage and ultra-high voltage power transmission and transformation technology in the power grid, more stringent conditions have been put forward for the safe operation of transformers, and higher requirements have been put forward for the performance and reliability of insulating paper for transformers. [0003] Meta-aramid insulatin...

Claims

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Application Information

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IPC IPC(8): C08G69/32C08G69/04D01F6/90D01F1/10
CPCC08G69/32C08G69/04D01F6/905D01F1/10
Inventor 曹凯凯李忠良伍威宋志成袁锋易勇曹卓刘含茂
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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