CN107858766B - Preparation method of antistatic easy-to-color polyurethane elastic fiber - Google Patents
Preparation method of antistatic easy-to-color polyurethane elastic fiber Download PDFInfo
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- CN107858766B CN107858766B CN201711299448.8A CN201711299448A CN107858766B CN 107858766 B CN107858766 B CN 107858766B CN 201711299448 A CN201711299448 A CN 201711299448A CN 107858766 B CN107858766 B CN 107858766B
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 33
- 239000004814 polyurethane Substances 0.000 title claims abstract description 33
- 210000004177 elastic tissue Anatomy 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920003226 polyurethane urea Polymers 0.000 claims abstract description 29
- 229920002334 Spandex Polymers 0.000 claims abstract description 27
- 239000004759 spandex Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000009987 spinning Methods 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000000578 dry spinning Methods 0.000 claims abstract description 6
- 239000004970 Chain extender Substances 0.000 claims abstract description 5
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 5
- 239000002798 polar solvent Substances 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims description 14
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 10
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 10
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 6
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 6
- 229940043237 diethanolamine Drugs 0.000 claims description 6
- BJZYYSAMLOBSDY-QMMMGPOBSA-N (2s)-2-butoxybutan-1-ol Chemical compound CCCCO[C@@H](CC)CO BJZYYSAMLOBSDY-QMMMGPOBSA-N 0.000 claims description 5
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 5
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 5
- BMVXCPBXGZKUPN-UHFFFAOYSA-N 1-hexanamine Chemical compound CCCCCCN BMVXCPBXGZKUPN-UHFFFAOYSA-N 0.000 claims description 3
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 claims description 3
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 28
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009941 weaving Methods 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 description 11
- 238000004040 coloring Methods 0.000 description 9
- 238000004043 dyeing Methods 0.000 description 9
- 239000000975 dye Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical group 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000004383 yellowing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 2
- ZLCUIOWQYBYEBG-UHFFFAOYSA-N 1-Amino-2-methylanthraquinone Chemical compound C1=CC=C2C(=O)C3=C(N)C(C)=CC=C3C(=O)C2=C1 ZLCUIOWQYBYEBG-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- -1 dimethyl quaternary ammonium salt Chemical class 0.000 description 1
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001048 orange dye Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- TZYULTYGSBAILI-UHFFFAOYSA-M trimethyl(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC=C TZYULTYGSBAILI-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/94—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of other polycondensation products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The invention provides a preparation method of antistatic easy-to-color polyurethane elastic fiber, which comprises the following steps: s1, mixing diisocyanate and oligomer dihydric alcohol for reaction; s2: dissolving the polyurethane prepolymer from S1 with an aprotic polar solvent; s3: cooling the prepolymer solution from S2 and adding a chain extender and a chain terminator; s4: adding an N-N-alkyldiethanolamine additive to the polyurethaneurea solution from S3; s5: and (3) curing the spandex spinning solution from S4, and then obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning. The antistatic performance is excellent, the colorability is excellent, the production process is simple, the cost is low, the investment is low, the industrial production is facilitated, the molecular structure of the fiber is not changed, the application of the fiber in subsequent weaving is not influenced, the heat resistance of the fiber is not reduced, and the spinnability of the fiber is not influenced.
Description
Technical Field
The invention relates to the technical field of preparation of high polymer materials, in particular to a preparation method of antistatic easy-to-color polyurethane elastic fibers.
Background
The polyurethane elastic fiber is a segmented copolymer with alternating soft and hard segments, and has wide application in various garment materials due to excellent tensile property and resilience. Polyurethane elastic fibers, which are one of synthetic fibers, have the same problem as other synthetic fibers in that static electricity is easily generated. The generation of static electricity adversely affects the production and post-processing of spandex fibers on the one hand; on the other hand, the spandex-containing textile generates the phenomena of fuzzing and pilling in the using process, which causes discomfort for human bodies. In addition, spandex fibers also have the disadvantages of difficult coloring and poor color fastness. The main reason is that the hard segment in the spandex fiber has strong polarity, the dye is difficult to enter, the soft segment has weak polarity, and the acting force between the soft segment and the dye molecules is weak.
Aiming at the problems that spandex fibers are easy to generate static electricity and are difficult to color, related spandex manufacturing enterprises and research institutions provide some solutions. Chinese patent CN106868614A discloses a conductive spandex fiber and a preparation method thereof, wherein a melt-spun spandex skin layer containing a certain proportion of conductive particles is attached to the outside of dry-spun spandex, so that the polyurethane fiber has good conductive performance, but the process is tedious, the investment is large, and the requirement for conductive master batch is high. Chinese patent CN106319681A discloses a preparation method of an easily-colored antistatic spandex fiber, wherein a color fixing agent is prepared by taking dimethyl diallyl ammonium chloride and allyl trimethyl ammonium chloride as raw materials, and then the color fixing agent is stirred and reacted with succinic acid diester sodium sulfonate to obtain the easily-colored antistatic spandex fiber, but the preparation process is quite complicated and is not beneficial to industrial production. Chinese patent CN101096779A discloses a preparation method of polyether type easy-to-dye spandex filament, which introduces organic compounds with special structures to remarkably improve the dyeability and the dye fastness of the prepared spandex fiber, but the technical proposal of the kind changes the molecular structure of the fiber and influences the application of the fiber in the subsequent weaving. Chinese patent CN105420843B discloses polyurethane elastic fiber with excellent dyeing property by using a polyurethane resin polymer containing dialkyl dimethyl quaternary ammonium salt, but such substance reduces the heat resistance of the fiber and affects the spinnability of the fiber.
In summary, a preparation method of polyurethane elastic fiber needs to be developed, and the prepared polyurethane elastic fiber not only has the advantages of easy coloring and antistatic property, but also has the advantages of simple production process, low investment, no influence on the application of the fiber in subsequent weaving, no influence on the spinnability of the fiber and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a preparation method of antistatic easy-to-color polyurethane elastic fiber, which solves the problems that the existing spandex fiber is easy to generate static electricity and is difficult to color, and simultaneously solves the problems that the existing preparation method of the easily-to-color antistatic spandex fiber is complicated in process and large in investment, the application of the fiber in back weaving is influenced, and the spinnability of the fiber is influenced.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of antistatic easy-to-color polyurethane elastic fiber comprises the following steps:
s1, mixing diisocyanate and oligomer dihydric alcohol for reaction to obtain a polyurethane prepolymer;
s2: dissolving the polyurethane prepolymer from S1 with an aprotic polar solvent to obtain a prepolymer solution;
s3: cooling the prepolymer solution from S2 and adding a chain extender and a chain terminator to form a polyurethaneurea solution;
s4: adding N-N-alkyl diethanol amine additives into the polyurethane urea solution from S3, and fully and uniformly mixing to form a spandex spinning solution;
s5: and (3) curing the spandex spinning solution from S4, and then obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning.
Further, the oligomer diol in S1 is polytetrahydrofuran ether glycol PTMG with the number average molecular weight of 1500-3000.
Further, the diisocyanate in S1 is 4, 4' -diphenylmethane diisocyanate.
Further, the aprotic polar solvent in S2 is N, N-dimethylformamide or N, N-dimethylacetamide.
Further, the chain extender in S3 is one or more of ethylenediamine, propylenediamine, and pentylenediamine, and the chain terminator in S3 is one or more of diethylamine, dipropylamine, ethanolamine, and n-hexylamine.
Further, the N-alkyldiethanolamine additive in S4 is represented by the following formula:
further, the R group is C10～C24Normal alkyl of (a).
Further, the R group is C12～C18Normal alkyl of (a).
Furthermore, the adding amount of the N-N-alkyl diethanol amine additive in the S4 is 0.01-20% of the mass of the polyurethane urea polymer.
Further, the apparent viscosity of the spandex spinning solution at 40 ℃ is 4000-6000 poise.
Compared with the prior art, the invention has the following beneficial effects: the antistatic performance is excellent, the colorability is excellent, the production process is simple, the cost is low, the investment is low, the industrial production is facilitated, the molecular structure of the fiber is not changed, the application of the fiber in subsequent weaving is not influenced, the heat resistance of the fiber is not reduced, and the spinnability of the fiber is not influenced.
Detailed Description
Example one
A preparation method of antistatic easy-to-color polyurethane elastic fiber comprises the following steps:
s1, mixing 87.004Kg of 4, 4' -diphenylmethane diisocyanate with the NCO/OH molar ratio of 1.636 and 376.15Kg of polytetrahydrofuran ether glycol PTMG with the number average molecular weight of 1810 for reaction at the reaction temperature of 85 ℃ for 2 hours to obtain an isocyanate group-terminated polyurethane prepolymer;
s2: 727.521Kg of N, N-dimethylacetamide was added to dissolve the polyurethane prepolymer from S1 to obtain a prepolymer solution;
s3: cooling the prepolymer solution from S2 to below 15 ℃, adding a mixture of ethylenediamine and propylenediamine to perform a chain extension reaction, adding 6.745Kg of ethylenediamine by mass, adding 1.2431Kg of propylenediamine by mass, adding diethylamine to perform a chain termination reaction, and adding 1.348Kg of diethylamine by mass to form a polyurethaneurea solution, wherein the polyurethaneurea solution comprises a polyurethaneurea polymer and N, N-dimethylacetamide;
s4: adding a flatting agent, an anti-yellowing agent, an ultraviolet absorbent, an antioxidant, a lubricating and unwinding agent and an N-N-alkyldiethanolamine additive with antistatic and easy-coloring effects into the polyurethane urea solution from S3, wherein the N-N-alkyldiethanolamine additive is represented by the following formula:
s5: and (3) curing the spandex spinning solution from S4, and then obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning.
Example two
This example is the same as that described in example one, except that the N-N-alkyldiethanolamine is added in an amount of 4% by weight based on the weight of the polyurethaneurea polymer.
EXAMPLE III
This example is the same as that described in example one, except that the N-N-alkyldiethanolamine is added in an amount of 20% by weight of the polyurethaneurea polymer.
Example four
This example is the same as the one described in example one, except that N-N-alkyldiethanolamine, an N-N-alkyldiethanolamine additive having antistatic and coloring effects, represented by the following formula, is added to the polyurethaneurea solution in S4:
Comparative example 1
This comparative example is the same as that described in example one, except that no N-N-alkyldiethanolamine-based additive having antistatic and readily colorable effects is added in S4.
The antistatic property evaluation and the coloring property evaluation were performed on the examples one to four and the comparative example one in the following manner:
(1) evaluation of the antistatic Properties of the fibers
The sample was detected by an electronic constant tension transport system at an input roller speed of 100m/min and an output roller speed of 350m/min, and an electrostatic potential measuring device was disposed at the output roller to measure the generated static electricity.
(2) Evaluation of coloring Properties of fibers
Dyeing for 30min under the conditions of 2 percent (owf) of weak acid red dye concentration, 90 ℃ of temperature, 4.0 of pH value and 1:40 of bath ratio, dyeing at room temperature with the heating rate of 2 ℃/min, and measuring the maximum absorbance of residual liquid before and after dyeing by using an ultraviolet visible spectrophotometer to calculate the dyeing rate; dyeing for 30min under the conditions of 2 percent (owf) of disperse orange dye concentration, 130 ℃ of temperature, 6.0 of pH value and 1:40 of bath ratio, dyeing at room temperature, wherein the heating rate is 2 ℃/min, and calculating the dye-uptake by measuring the maximum absorbance of residual liquid before and after dyeing by an ultraviolet visible spectrophotometer. Calculating the formula:
dye uptake rate ═ a0-A1)/A0X 100% where A0And A1The absorbance of the dye solution before and after dyeing is respectively.
The results obtained are shown in table 1 below:
TABLE 1
As can be seen from the data in Table 1, the polyurethane elastic fiber obtained by adding the N-N-alkyldiethanolamine substance to the polyurethaneurea solution is superior to the polyurethane elastic fiber without the N-N-alkyldiethanolamine substance in antistatic ability and coloring property. And the same N-N-alkyl diethanol amine substance is added, and the more the addition amount is, the better the antistatic ability and the colorability are.
EXAMPLE five
A preparation method of antistatic easy-to-color polyurethane elastic fiber comprises the following steps:
s1, mixing 87.004Kg of 4, 4' -diphenylmethane diisocyanate with the NCO/OH molar ratio of 1.636 and 376.15Kg of polytetrahydrofuran ether glycol PTMG with the number average molecular weight of 1810 for reaction at the reaction temperature of 85 ℃ for 2 hours to obtain an isocyanate group-terminated polyurethane prepolymer;
s2: 727.521Kg of N, N-dimethylformamide was added to dissolve the polyurethane prepolymer from S1 to obtain a prepolymer solution;
s3: cooling the prepolymer solution from S2 to below 15 ℃, adding a mixture of ethylenediamine and propylenediamine to perform a chain extension reaction, adding 6.745Kg of ethylenediamine by mass, adding 1.2431Kg of propylenediamine by mass, adding diethylamine to perform a chain termination reaction, and adding 1.348Kg of diethylamine by mass to form a polyurethaneurea solution, wherein the polyurethaneurea solution comprises a polyurethaneurea polymer and N, N-dimethylformamide;
s4: adding a flatting agent, an anti-yellowing agent, an ultraviolet absorbent, an antioxidant, a lubricating and unwinding agent and an N-N-alkyldiethanolamine additive with antistatic and easy-coloring effects into the polyurethane urea solution from S3, wherein the N-N-alkyldiethanolamine additive is represented by the following formula:
s5: and (3) curing the spandex spinning solution from S4, and then obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning.
EXAMPLE six
A preparation method of antistatic easy-to-color polyurethane elastic fiber comprises the following steps:
s1, mixing 87.004Kg of 4, 4' -diphenylmethane diisocyanate with the NCO/OH molar ratio of 1.636 and 376.15Kg of polytetrahydrofuran ether glycol PTMG with the number average molecular weight of 1810 for reaction at the reaction temperature of 85 ℃ for 2 hours to obtain an isocyanate group-terminated polyurethane prepolymer;
s2: 727.521Kg of N, N-dimethylacetamide was added to dissolve the polyurethane prepolymer from S1 to obtain a prepolymer solution;
s3: cooling the prepolymer solution from S2 to below 15 ℃, adding a mixture of ethylenediamine and propylenediamine to perform a chain extension reaction, adding 6.745Kg of ethylenediamine by mass, adding 1.2431Kg of propylenediamine by mass, adding diethylamine to perform a chain termination reaction, and adding 1.348Kg of diethylamine by mass to form a polyurethaneurea solution, wherein the polyurethaneurea solution comprises a polyurethaneurea polymer and N, N-dimethylacetamide;
s4: adding a flatting agent, an anti-yellowing agent, an ultraviolet absorbent, an antioxidant, a lubricating and unwinding agent and an N-N-alkyldiethanolamine additive with antistatic and easy-coloring effects into the polyurethane urea solution from S3, wherein the N-N-alkyldiethanolamine additive is represented by the following formula:
s5: and (3) curing the spandex spinning solution from S4, and then obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning.
Of course, in the above embodiment, in S3, a mixture of ethylenediamine and propylenediamine is added to perform a chain extension reaction, or one or more mixtures of ethylenediamine, propylenediamine, and pentylenediamine are added to perform a chain extension reaction; adding diethylamine to perform chain termination reaction, or adding one or more of diethylamine, dipropylamine, ethanolamine, and n-hexylamine to perform chain termination reaction.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The preparation method of the antistatic easy-to-color polyurethane elastic fiber is characterized by comprising the following steps of:
s1, mixing diisocyanate and oligomer dihydric alcohol for reaction to obtain a polyurethane prepolymer;
s2: dissolving the polyurethane prepolymer from S1 with an aprotic polar solvent to obtain a prepolymer solution;
s3: cooling the prepolymer solution from S2 and adding a chain extender and a chain terminator to form a polyurethaneurea solution;
s4: adding an N-N-alkyl diethanol amine additive into the polyurethane urea solution from S3, and fully and uniformly mixing to form a spandex spinning solution, wherein the N-N-alkyl diethanol amine additive is represented by the following formula:
the R group is C10 ~ C24Normal alkyl of (a);
s5: after the spandex spinning solution from S4 is cured, obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning;
the addition amount of the N-N-alkyl diethanol amine additive in the S4 is 0.01-20% of the mass of the polyurethane urea polymer.
2. The method for preparing an antistatic easy-to-color polyurethane elastic fiber according to claim 1, wherein: the oligomer dihydric alcohol in the S1 is polytetrahydrofuran ether glycol PTMG with the number average molecular weight of 1500-3000.
3. The method for preparing an antistatic easy-to-color polyurethane elastic fiber according to claim 1, wherein: the diisocyanate in the S1 is 4, 4' -diphenylmethane diisocyanate.
4. The method for preparing an antistatic easy-to-color polyurethane elastic fiber according to claim 1, wherein: the aprotic polar solvent in the S2 is N, N-dimethylformamide or N, N-dimethylacetamide.
5. The method for preparing an antistatic easy-to-color polyurethane elastic fiber according to claim 1, wherein: the chain extender in S3 is one or more of ethylenediamine, propylenediamine and pentylenediamine, and the chain terminator in S3 is one or more of diethylamine, dipropylamine, ethanolamine and n-hexylamine.
6. The method for preparing an antistatic easy-to-color polyurethane elastic fiber according to claim 1, wherein: said R radical C12 ~ C18Normal alkyl of (a).
7. The method for preparing an antistatic easy-to-color polyurethane elastic fiber according to claim 1, wherein: the apparent viscosity of the spandex spinning solution at 40 ℃ is 4000-6000 poise.
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| CN110373742A (en) * | 2019-06-24 | 2019-10-25 | 郑州中远氨纶工程技术有限公司 | A kind of preparation method of easy dyeing polyurethane fiber |
| CN115928243B (en) * | 2023-02-03 | 2025-01-28 | 郑州中远氨纶工程技术有限公司 | A method for preparing antistatic spandex and the prepared antistatic spandex |
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