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Meta-aromatic poly-1,3,4-oxadiazole and fibrid containing it

A technology for precipitating fibers and oxadiazoles, applied in the field of meta-aromatic poly-1,3,4-oxadiazoles and its preparation, which can solve the problems of poor temperature resistance and flame retardancy, complicated process procedures, and poor test repeatability and other problems, to achieve the effect of uniform size, good dispersion and good fiber dispersion

Active Publication Date: 2018-04-27
JIANGSU BAODE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the length, diameter and performance of such POD fibers are difficult to guarantee, the process procedures are complicated, and it is difficult to ensure continuity and stability in actual operation.
At the same time, more polyester fibers with poor temperature resistance and flame retardancy are mixed into the raw materials, and the flame retardancy and high temperature resistance of the final paper are difficult to guarantee.
[0007] In addition, US2014 / 0184371A1 describes a preparation method of POD flocculent polymer and its paper forming method, but the process conditions are relatively random and the test repeatability is poor

Method used

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  • Meta-aromatic poly-1,3,4-oxadiazole and fibrid containing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: Preparation of meta-POD

[0092] First add 7 parts of oleum to the reaction kettle through the metering device, then mix 1 part of IPA and 0.7 parts of HS and add them together to the reaction kettle. After stirring evenly, program the temperature to 100°C and the stirring speed to 100rpm. When the stirring torque reaches 20Nm, the online viscosity at this time is 35Pa·s, and this stage is the pre-polymerization reaction. Turn on the tail gas absorption device, add 3 parts of oleum and 0.3 parts of HS at the same time to continue the reaction, and program the temperature to 120°C. Stop stirring when the stirring torque reaches 50Nm, and the online viscosity at this time is 81Pa·s, and this stage is a polymerization reaction. The concentration of the finally obtained polymer stock solution was 6%. Drop a certain amount of polymer solution into water, filter the coagulated and precipitated polymer, wash it with a large amount of water several times to become ...

Embodiment 2

[0093] Example 2: Preparation of meta-POD

[0094] First add 5 parts of oleum to the reaction kettle through the metering device, then mix 1 part of IPA and 0.5 parts of HS and add them to the reaction kettle together. After stirring evenly, program the temperature to 70°C, and the stirring speed is 100rpm. When the stirring torque reaches 30Nm, the online viscosity at this time is 22Pa·s, and this stage is the pre-polymerization reaction. Turn on the tail gas absorption device, add 3 parts of oleum and 0.3 parts of HS at the same time to continue the reaction, and program the temperature to 120°C. Stop stirring when the stirring torque reaches 50Nm, and the online viscosity at this time is 65Pa·s, and this stage is a polymerization reaction. The concentration of the finally obtained polymer stock solution was 5%. Drop a certain amount of polymer solution into water, filter the coagulated and precipitated polymer, wash it with a large amount of water several times to become ...

Embodiment 3

[0095] Embodiment 3: the preparation of meta-position POD

[0096] First add 10 parts of oleum to the reaction kettle through the metering device, then mix 1 part of IPA and 1 part of HS and add them to the reaction kettle together. After stirring evenly, program the temperature to 100°C and the stirring speed to 100rpm. When the stirring torque reaches 25Nm, the online viscosity at this time is 45Pa·s, and this stage is the pre-polymerization reaction. Turn on the tail gas absorption device, add 5 parts of oleum and 0.5 parts of HS to continue the reaction, and program the temperature to 120 °C. Stop stirring when the stirring torque reaches 65Nm, and the online viscosity at this moment is 117Pa·s, and this stage is a polymerization reaction. The concentration of the finally obtained polymer stock solution was 8%. Drop a certain amount of polymer solution into water, filter the coagulated and precipitated polymer, wash it with a large amount of water several times to become...

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Abstract

The present invention relates to meta-aromatic poly-1,3,4-oxadiazoles and fibrids comprising them, and to the use of such fibrids in the manufacture of insulating materials such as paper.

Description

technical field [0001] The present invention relates to meta-aromatic poly-1,3,4-oxadiazole and its preparation method, fibrids comprising said meta-aromatic poly-1,3,4-oxadiazole, and such precipitated Use of fibrous fibers in the manufacture of insulating materials such as paper. Background technique [0002] As an industrial basic material, insulating materials play an important role in the industrial system. Its applications involve electricity, electronics, home appliances, locomotives, and aerospace. Insulating materials are an important guarantee for the long-term safe operation of electrical products, and are also key materials that directly affect the advanced level of technical indicators of electrical products. The country has always attached great importance to the development of insulating materials. One of the more widely used insulating materials is specialty paper made of high-performance fibers such as aramid fibers. However, the temperature resistance g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/08D01F6/74D21H13/20
Inventor 吴萌徐建军叶光斗杨远凤冯娇
Owner JIANGSU BAODE NEW MATERIAL
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