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A polyurethaneurea elastic fiber, and a process of preparing the same

A polyurethane urea and elastic fiber technology, applied in the direction of single-component polyurethane artificial filament, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problem that the performance and color of polyurethane elastic fiber are easily changed and deteriorated by sunlight, and cannot prevent elasticity Body performance and other issues, to achieve the effect of excellent UV resistance, excellent light resistance, excellent heat resistance

Inactive Publication Date: 2001-08-29
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the polyurethane-based elastic fiber is exposed to the atmosphere, there is a problem that its original performance and color will be changed by sunlight, and it is easily changed by exhaust gas in the atmosphere, and it is also easily oxidized by the natural air outside, making it Its original performance deteriorates
[0003] In order to remedy these defects, Korean patent application No.90-10867 discloses the method of using phenolic antioxidants, amine UV light stabilizers and methacrylate yellowing inhibitors as additives, but its disadvantage is that methyl Acrylics have poor heat resistance, which causes the polymer to flow out and sublimate when spinning at high temperatures, causing troubles in processing
[0004] In U.S. Patent No. 4,548,975, a method for improving the thermal and oxidation stability of fibers by using phenolic antioxidants and phosphite antioxidants is disclosed, but it has a disadvantage that the polyurethane elastic fibers made performance and color are easily changed by sunlight
[0005] In Korean Patent Laid-Open No. 93-11337, a method for producing weatherable elastomers using phenolic antioxidants, phosphite antioxidants, amino acid yellowing inhibitors, and benzotriazole light stabilizers is described , but it has a problem that benzotriazole light stabilizers have almost no heat resistance and compatibility with polyurethane elastomers, making it flow out and sublimate during spinning, which has a bad effect on the process
[0006] Korean Patent Application No. 93-28704 describes a method for producing chlorine-resistant elastic fibers using inorganic salts, but it has a problem that the technology cannot prevent deterioration of elastomer properties caused by light and heat
[0007] Korean Patent Laid-Open No. 97-7688 discloses a composition using a phenolic antioxidant and a metal salt chlorine resistant agent, but it has a problem that this method cannot prevent fading and deterioration of physical properties caused by sunlight
[0008] In Korean Patent Laid-Open No. 96-11609, benzophenol-based light-resistant agents and inorganic salt chlorine-resistant agents are used to improve the performance of resistance to ultraviolet light and chlorine, but it has a problem that it cannot prevent the deterioration of physical properties due to heat or exhaust gas and fade
[0009] As described above, there are many proposals for compositions containing various stabilizers that improve the weather resistance of polyurethane-based elastomers, but there is no description of a technology that combines total weather resistance with light resistance, exhaust gas resistance, chlorine resistance, oxidation resistance, etc., and Method for producing polyurethane elastic fiber capable of running for a long time in a stable processing state

Method used

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  • A polyurethaneurea elastic fiber, and a process of preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A mixture of 4,4′-diphenylmethane diisocyanate and polytetramethylene ether glycol with a molar ratio of 2.0 was reacted at 90° C. for 90 minutes to prepare isocyanate-terminated polyurethane urea (prepolymer).

[0045] After cooling the prepolymer to 40°C, N,N'-dimethylacetamide was added to prepare a 45% solution containing the prepolymer. Cool the prepolymer solution to 5°C, then, for the preparation of the polyurethaneurea solution, slowly add a N,N'-dimethylacetamide solution containing 96% equivalents of ethylenediamine and 6% equivalents of diethylamine under vigorous stirring , to grow and / or terminate its chain.

[0046] In the prepared polyurethaneurea solution, add 1.2% (weight) of 1,3,5-tri(4-tert-butyl-3-hydroxyl-2,6-xylene)-1 ,3,5-Triazine-2,4,6-(1H,3H,5H)trione, 1.0% by weight of 1,1,1′,1′-tetramethyl-4,4′-( Methylene-two-p-phenylene) diamino acid exhaust gas stabilizer, 1.2% (weight) of zinc oxide chlorine resistance agent, 2.0% (weight) of N 2 -(4-ca...

Embodiment 2

[0048] Use the method identical with embodiment 1, make polyurethane urea elastic fiber, difference is to use the additive N of 1.5% (weight). 2 -(4-carboethoxyphenyl)-N 1 -Methyl-N 1 - phenylformamidine UV absorber. Then, the light resistance, oxidation resistance (heat resistance), chlorine resistance and exhaust gas resistance of the fibers were evaluated, and the results are shown in Table 1 below.

Embodiment 3

[0050] Use the method identical with embodiment 1, make polyurethane urea elastic fiber, difference is to use the additive N of 1.0% (weight). 2 -(4-carboethoxyphenyl)-N 1 -Methyl-N 1 - phenylformamidine UV absorber. Then, the light resistance, oxidation resistance (heat resistance), chlorine resistance and exhaust gas resistance of the fibers were evaluated, and the results are shown in Table 1 below.

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Abstract

This invention relates to a polyurethaneurea elastic fiber of which the weatherability is excellent and the preparing method thereof. The invention prepares the polyurethaneurea elastic fiber by adding the formamidine type ultraviolet absorber of formula I to the spinning dope and the strength maintenance rate of the polyurethaneurea elastic fiber is over 90 % after being left for 24 hours at the Fade-O-Meter in which the sunshine carbon arc is installed, wherein, R1 and R2 represent an each alkyl group of 1 to 5 carbon atoms.

Description

technical field [0001] The invention relates to a polyurethane urea elastic fiber with excellent weather resistance and a preparation method thereof. technical background [0002] Polyurethane elastic fiber has excellent elasticity and elastic recovery, so it is widely used in socks, women, underwear, sportswear, swimwear, etc. However, if the polyurethane-based elastic fiber is exposed to the atmosphere, there is a problem that its original performance and color will be changed by sunlight, and it is easily changed by exhaust gas in the atmosphere, and it is also easily oxidized by the natural air outside, making it Its original performance deteriorates. [0003] In order to remedy these defects, Korean patent application No.90-10867 discloses the method of using phenolic antioxidants, amine UV light stabilizers and methacrylate yellowing inhibitors as additives, but its disadvantage is that methyl Acrylic esters have poor heat resistance, which causes the polymer to flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00D01F1/10D01F6/70D01F6/94
CPCD01F1/106D01F6/70
Inventor 权一天刘锡哲许亨敦
Owner KOLON IND INC
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