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Production method of polyimide color silk

A polyimide, production method technology, applied in the directions of single-component synthetic polymer rayon, adding pigments in spinning solution, chemical characteristics of fibers, etc., can solve the problems of limited application, difficult to dye, difficult to dye, etc., Achieve the effect of high color fastness, low production cost and simple process

Active Publication Date: 2016-07-20
JIANGSU AOSHEN HI TECH MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyimide fiber is widely used in high-temperature filtration, high-temperature heat insulation, electrical insulation and other industrial applications due to its excellent heat resistance, but at the same time, due to its inherent golden yellow or dark brown color, it is not easy to dye. It limits its application in high temperature protection and clothing fields, so the development of polyimide colored yarn is particularly important for its expanded application range
[0003] Most aromatic polyimides are golden yellow or dark brown due to the existence of highly conjugated structures and / or the formation of charge transfer complexes between molecules that make them strongly absorb in the visible light region, making it difficult to dye

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of production method of polyimide color silk, its steps are as follows:

[0023] (1) Preparation of color paste: Take 50 parts by weight of N,N-dimethylacetamide solvent into the blending kettle, add 1 part of dispersant, stir for 1 hour; add 10 parts of pigment, grind and disperse for 8 hours ;

[0024] (2) Preparation of spinning slurry: add diamine monomer A and 4,4'-diaminodiphenyl ether (ODA) to an appropriate amount of N,N-dimethylacetamide (DMAC) solvent in a certain molar ratio In the process, stir evenly to dissolve, add a certain amount of dianhydride monomer B at -5°C, react for 2 hours, control the viscosity of the stock solution to 100poise, start the circulation pump of the stock solution circulation line outside the kettle, and place the static mixer at the entrance of the stock solution circulation line with Add an appropriate amount of color paste at a rate of 300g / min, continue the reaction for 1 hour, and finally add the dianhydr...

Embodiment 2

[0027] Embodiment 2, a kind of production method of polyimide color silk, its steps are as follows:

[0028] (1) Preparation of color paste: Take 90 parts by weight of N,N-dimethylacetamide solvent into the blending kettle, add 15 parts of dispersant, stir for 3 hours; add 40 parts of pigment, grind and disperse for 16 hours ;

[0029] (2) Preparation of spinning slurry: add diamine monomer A and 4,4'-diaminodiphenyl ether (ODA) to an appropriate amount of N,N-dimethylacetamide (DMAC) solvent in a certain molar ratio , stir to dissolve evenly, add a certain amount of dianhydride monomer B at 20°C, react for 2 hours, control the viscosity of the stock solution to 1000poise, start the circulation pump of the stock solution circulation line outside the kettle, and use 1500g Add an appropriate amount of color paste at a rate of / min, continue the reaction for 1 hour, and finally add the dianhydride monomer pyromellitic dianhydride (PMDA), stir and polymerize for 5 hours to obtain...

Embodiment 3

[0032] Embodiment 3, a kind of production method of polyimide color silk, its steps are as follows:

[0033] (1) Preparation of color paste: Add 75 parts of N,N-dimethylacetamide solvent into the blending kettle according to the weight ratio, add 10 parts of dispersant, stir for 2 hours; add 25 parts of pigment, grind and disperse for 12 hours ;

[0034] (2) Preparation of spinning slurry: add diamine monomer A and 4,4'-diaminodiphenyl ether (ODA) to an appropriate amount of N,N-dimethylacetamide (DMAC) solvent in a certain molar ratio , stir to dissolve evenly, add a certain amount of dianhydride monomer B at 10°C, react for 2 hours, control the viscosity of the stock solution to 500poise, start the circulation pump of the stock solution circulation line outside the kettle, and use 1000g Add an appropriate amount of color paste at a rate of / min, continue the reaction for 1 hour, and finally add the dianhydride monomer pyromellitic dianhydride (PMDA), stir and polymerize for...

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Abstract

The invention provides a production method of polyimide colored silk. The production method comprises the following steps: (1) blending color paste; (2) synthesizing light-color polyimide; (3) preparing newly spun silk with the polyamic acid under dry spinning technological conditions; (4) preparing colored polyimide fibers from the newly spun silk through cyclizing and drafting. The invention states a production technology for producing the polyimide color silk under dry-method technological skills. The production technology disclosed by the invention adopts dope dyeing, compared with a dyeing technology, the dope dyeing has the advantage of high color fastness, and besides, the method is simple in technology and low in production cost; influence on environment is small, and waste water, waste gas and the like are hardly generated; the produced polyimide color silk can be used for protective clothes of different purposes such as military and civil uses.

Description

technical field [0001] The invention relates to a production method of polyimide colored yarn, in particular to a method for producing polyimide colored yarn under a dry spinning process, and belongs to the technical field of producing differentiated fibers. Background technique [0002] Polyimide fiber is widely used in high-temperature filtration, high-temperature heat insulation, electrical insulation and other industrial applications due to its excellent heat resistance, but at the same time, due to its inherent golden yellow or dark brown color, it is not easy to dye. Its application in high temperature protection and clothing fields is limited, so the development of polyimide colored yarn is particularly important for expanding its application range. [0003] Most aromatic polyimides are golden yellow or dark brown due to the existence of highly conjugated structures and / or the formation of charge transfer complexes between molecules, which make them strongly absorb in...

Claims

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Application Information

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IPC IPC(8): D01F6/78D01F6/74D01F1/04C08G73/10
CPCC08G73/1071D01F1/04D01F6/74D01F6/78
Inventor 王士华郭涛苗岭陈斌仲明明王瑾张清华陶明东关佃波王庆龙陆飞
Owner JIANGSU AOSHEN HI TECH MATERIALS CO LTD
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