Preparation method for high-temperature-resistant and fatigue-resistant irradiation-crosslinked polyurethane fibers

A cross-linked polyurethane and fatigue-resistant technology, which is applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of high-temperature resistance, fatigue resistance and aging resistance of polyurethane fibers, and achieve high production efficiency and improved The effect of high temperature resistance and low cost

Active Publication Date: 2015-11-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] What the present invention is to solve is the problem of poor high temperature resistance, fatigue resistance and aging resistance of existing polyurethane fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 200Kg of polytetrahydrofuran ether glycol PTMG (number average molecular weight 2500) and 43Kg of 4,4'-toluene diisocyanate were reacted at 75°C for 2.5h to generate an isocyanate group-terminated polyurethane prepolymer. Add 220Kg of N,N-dimethylacetamide solvent to the prepolymer to dissolve the prepolymer in the polar solvent.

[0031] Cool the prepolymer solution to below room temperature, add 12Kg of 2,2'-bis(trifluoromethyl)-4,4'-diaminophenyl ether and 0.4Kg of diethylamine in N,N-di Methylacetamide solution carries out chain extension reaction and chain termination reaction; then add 0.05kg of butynediol, 20kg high-density polyethylene, 2kgTAIC and 0.3kg phthalocyanine photosensitizer and fully stir to obtain polyurethane spinning stock solution; polyurethane spinning The silk stock solution was matured and spun dry to obtain 40D polyurethane fibers, and the polyurethane fibers were irradiated and cross-linked with electron beams, and the irradiation dose was 7....

Embodiment 2

[0036] 100Kg of polypropylene glycol PPG (number average molecular weight 1810) and 20Kg of 2,4-toluene diisocyanate were reacted at 85°C for 1.5h to generate an isocyanate-terminated polyurethane prepolymer. Add 100Kg of N,N-dimethylacetamide solvent to the prepolymer to dissolve the prepolymer in the polar solvent.

[0037] Cool the prepolymer solution to below room temperature, add the N,N-dimethylacetamide solution containing 5Kg of 2-trifluoromethyl-4,4'-diaminodiphenyl ether and 0.4Kg of dipropylamine for expansion chain reaction and chain termination reaction; then add 0.01kg of butynediol, 8kg low-density polyethylene, 0.9kgTAIC and 0.5kg phthalocyanine photosensitizer and fully stir to obtain polyurethane spinning stock solution; polyurethane spinning stock solution is matured, 40D polyurethane fibers were obtained by dry spinning, and the polyurethane fibers were irradiated and crosslinked with an electron beam, and the irradiation dose was 5 Mrad.

[0038] Table 2 ...

Embodiment 3

[0042] 100Kg of polypropylene glycol PPG (number average molecular weight 1810) and 30Kg of 2,4-toluene diisocyanate were reacted at 90°C for 1 hour to generate an isocyanate-terminated polyurethane prepolymer. Add 75Kg of N,N-dimethylacetamide solvent to the prepolymer to dissolve the prepolymer in the polar solvent.

[0043] Cool the prepolymer solution to below room temperature, add N,N-dimethylacetamide solution containing 4.5Kg of 2-trifluoromethyl-4,4'-diaminodiphenyl ether and 0.5Kg of dipropylamine Chain extension reaction and chain termination reaction; then add 0.01kg of butynediol, 8kg of medium density polyethylene, 0.9kgTAIC and 0.5kg of phthalocyanine photosensitizer and fully stir to obtain the polyurethane spinning stock solution; the polyurethane spinning stock solution is matured, 40D polyurethane fibers were obtained by dry spinning, and the polyurethane fibers were cross-linked by ultraviolet radiation for 2.5 minutes.

[0044] table 3

[0045] H...

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Abstract

The invention discloses a preparation method for high-temperature-resistant and fatigue-resistant irradiation-crosslinked polyurethane fibers. The preparation method is characterized by comprising the following steps of preparing an isocyanate-terminated polyurethane prepolymer from raw materials dihydric alcohol and diisocyanate, adding a butynediol catalyst and polyolefin powder into the prepolymer, and dissolving the polyurethane prepolymer with an aprotic polar solvent to obtain a prepolymer solution; adding a mixed amine solution into the prepolymer solution, and performing chain extension reaction and chain termination reaction to form a polyurethane urea solution; adding a crosslinking additive and a photosensitizer into the polyurethane urea solution to prepare a spandex spinning solution; after the spandex spinning solution is cured, preparing polyurethane fibers by adopting a drying spinning method, and improving three-dimensional crosslinked networks in the fibers by adopting irradiation crosslinking or ultraviolet crosslinking. The polyurethane fibers prepared by the method have the characteristics of high temperature resistance, fatigue resistance and aging resistance, and have broader prospect in the fields of high-end civilian use and industrial use.

Description

technical field [0001] The present invention relates to a preparation method of high-temperature-resistant fatigue-resistant irradiation cross-linked polyurethane fiber, in particular to a method for producing high-performance polyurethane fiber with high temperature resistance, fatigue resistance and aging resistance by adopting radiation cross-linking or ultraviolet cross-linking processing technology processing methods. Background technique [0002] With the development of the global economy and society and the increasing awareness of human living standards and safety and environmental protection, the demand for new materials with green environmental protection, safety and health, and special properties is becoming stronger and stronger. Polyurethane fiber is a synthetic fiber with excellent properties such as high elongation at break and high elastic recovery rate, and is widely used in knitted apparel, household products and other fields. When polyurethane fiber is wea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/66C08G18/48C08G18/10D06M10/00
Inventor 王依民倪建华郑伟邹黎明夏于旻庄园园黄烁涵李宗昊郑楚昱
Owner DONGHUA UNIV
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