TWI281524B - A spandex fiber with discoloration-resistance and chlorine-resistance and a method for manufacturing the same - Google Patents

Abstract

The present invention relates to a spandex fiber having excellent discoloration-resistance and chlorine-resistance and keeping the intrinsic properties of polyurethane polymers by preventing the spandex fiber from being discolored in the spinning process, and a method for manufacturing the same. The spandex fiber of the present invention contains the hydrotalcite coated with melamine-based compounds from which water of crystallization is removed. The spandex fiber of the present invention may be distinguished from that of the conventional art in that the former does not be discolored in spinning process and has excellent discoloration-resistance and chlorine-resistance. The spandex fiber of the present invention may be utilized in the field of clothes such as underwear and socks, in particular sports wear because of the excellent discoloration-resistance and chlorine-resistance.

Description

1281524 λ IX. Description of the Invention: [Technical Field of the Invention] [1] The present invention relates to a method for producing Dex fiber having high fading resistance and high gas resistance, and the present invention also relates to a new manufacturing method It has the characteristics of the original spandex fiber. [Prior Art] [2] Spandex fiber generally has the high elasticity of rubber-like rubber and the physical properties of rat, such as high tensile force and restoring force, etc., so it has been used in 谂φ clothing, socks and sporting goods. . [3] However, if the spandex, which is mainly composed of p〇lyUrethane, is washed with a chlorine-containing lotion, the physical properties of the polyurethane may be I> Similarly, after the spandex and polyamide-weaved swimsuits are exposed to chlorine-containing water (the concentration of active chlorine is 〇·5 to 3.5 ppm), the physical properties of the spandex f are also degraded. $ [4] In order to solve the problem of quality degradation caused by chlorine, many research efforts have been made to develop compounds containing high chlorine resistance, for example, zinc oxide of U.S. Patent No. 4,340,527, and Coke Town of US Patent No. US 5,626,960 _ (huntite) and hydromagnesite mixture, Korean carbonate number 92-3250 calcium carbonate and barium carbonate, Japanese patent number JP H6-81215 magnesium oxide / zinc oxide ( MgO/ZnO) solid, magnesium oxide, magnesium hydroxide or hydrotalcite of Japanese Patent No. JP S 59-133248, Japanese Patent No. JP Η 3-292364 fatty acid (fatty acid) And hydrotalcite coated with the saline coupling agent, US Patent No. US 5,447,969 with stearic acid and its crystal water • coated magnesium hydrotalcite, US Patent No. U.S. Patent No. 6,692,828, the disclosure of which is incorporated herein by reference. hydrotalcite) an average particle size of less than 1 μιη square

[5] In particular, according to the method of stearic acid and crystal water-coated magnesium hydrotalcite, which is described in U.S. Patent No. 5,447,969, the present invention describes that this highly chlorine-resistant compound prevents aluminum during the manufacture of spandex fibers. The aggregation of magnesium carbonate, the risk of discharge pressure, the prevention of breakage of the thread during the spinning process, and the yellowing of the fiber, no expansion during the drying and tannin solution treatment, even at a high temperature dry spinning process of 330 ° C _ There is also no yellowing. [6] However, according to the content of U.S. Patent No. 5,447,969, it has also been found that spandex fibers made of fatty acid-coated crystalline aluminum silicate magnesium carbonate can be yellowed during the high temperature and high pressure dry spinning process at 250 °C. The phenomenon. [7] In general, even if it has a high resistance to chlorine, the problem of fiber fading and the inability to whiten it will undoubtedly detract from its value, so the problem is overcome and the improvement is further improved. It must be done. [8] According to the content of US Pat. No. 5,447,969, if a fiber made of magnesium carbonate containing crystal water is used, it does not cause fading and swelling during the dyeing and tannin solution treatment, but it is also found to be free. The fiber yarn made of magnesium crystallization of crystal water does not have the problem of fading and swelling. [9] According to the content of US Pat. No. 6,692,828, a fiber made of aluminum magnesium sulphate coated with a melamine compound excellent in heat resistance, in a high temperature spinning process at 250 ° C, and a US patent No. US 5,447,969 results in the same fading, and the degree of fading resistance is better than the former. [10] According to the method described in European Patent No. EP 1,262,499 A1, magnesium aluminocarbonate is ground into powder. After the addition, it is added to the polymer. This technique is widely known in the art as 1,281,524, and the aluminum magnesium carbonate used is uncoated and has no crystal water. If the uncoated aluminum magnesium carbonate is added to the spandex polymer, the aggregation and gelation will occur during the manufacturing process, so it is important to use the coated aluminum magnesium carbonate. [11] According to European Patent No. EP 1,262,499 A1, the aluminum magnesium carbonate structure used is different from the conventional aluminum magnesium carbonate structure, part of the carbon ions are decomposed, a small amount of oxygen is added, and the above-mentioned aluminum is added. The structure of magnesium carbonate may be formed by heat treatment at 300 C and disintegration of crystal structure. The crystal structure of the aluminum carbonate town and its carbon ion content have an important influence on the presence or absence of chlorine resistance of the fiber. Therefore, if the crystal is disintegrated and the carbon ion content is too low, the chlorine resistance of the fiber may be promoted. reduce. [12] In order to verify the above speculation, according to the contents of European Patent No. Ep 1,262,499 A1, a magnesium aluminum carbonate material containing oxygen and having a low carbon ion content and subjected to heat treatment at a temperature higher than 300 ° C is prepared, and then It is further mixed with other additives in dimethylacetamide to form a slurry, and then the raw material is mixed with a spandex polymer by a mill to prepare a spandex. [13] This spandex fiber does not produce fading during the spinning process above 2〇〇c, but there is a problem of clogging and spinning breakage during the spinning process. This phenomenon may be due to both The aluminum magnesium carbonate is mixed very uniformly, but due to the unaltered aluminum magnesium sulphate, the absorption of water in the polymer and the aggregation of the aluminum acid-breaking town occur too quickly, resulting in the final preparation of the silk Chlorine resistance is still inferior to that prepared by other conventional methods. SUMMARY OF THE INVENTION [14] The present invention relates to solving the problems of the conventional technology, in the heat-resistant melamine compound coated aluminum magnesium carbonate method, in the heat treatment process below 3 cc, water of crystallization Will be removed without causing a decrease in carbon ion content. 1281524 This magnesium carbonate material is added to the polymer and has excellent chlorine resistance, even above 20 (TC). The spinning process also has ^, ^, and cookware [15] The object of the present invention is mainly to provide the color of the carbonated town containing the carbonic acid. The preparation method of the dimension, whether it is higher than 200 ° C Or the ^ke fiber process, has the advantages of anti-fading and chlorine resistance. && spinning system [16] spinning or spinning process mentioned in the present invention, spoon #, and Dry spinning, the spinning temperature indicates that the spandex polymer is melted at a high temperature, for example, the temperature at which the polymer melts during the melt spinning process, and the temperature of the furnace body in the middle of the process, the fading property indicates that the fiber changes from white to yellow. Spinning [Embodiment] ^ In order to achieve the above In the spandex, the weight percentage of ▲Lu carbon is the OP/Q~1〇% of the fiber. The weight percentage of the melamine compound is 0.1%~10% of the carbonated town, and the magnesium aluminum carbonate must be [ 18] The molecular formula of magnesium aluminum carbonate is represented by (1): , ... 1 ° M2+xAlm(OH)y (Αη·)ζ - (1) Μ represents a town ion (Mg2) or a zinc ion (Zn2+), and An- represents any Thai η valence anion, \ and y represent 2 or more digits, 2 and m represent any positive number, and then An_ represents OH·, F-, Cl·, Br-, N〇3-, s〇42- , one of ch3CO〇-, C〇32-, HP042-, Fe(CN)63-, oxalic acid anion (〇xalate i〇n), salicylate ion. [19] At least aluminum magnesium carbonate The compounds listed below (2) to (5)

Mg4.5Al2(〇H)i3C〇3 ---- (2) (3) (4)

Mg6Al2(OH)16CO

Mg8Al2(OH)2〇C03 8 1281524

Mg4Al2(〇H)i2C03 —- (5) [20] Preferably, the melamine compound is at least a phosphorus-containing tripolyamine compound, a phosphorus melamine compound, a melamine cyanurate compound, an organic acid-substituted melamine compound, An organophosphate-substituted phosphorus melocyanate compound or an organic acid-substituted melamine cyanurate compound. [21] The non-crystalline aluminum aluminate carbonate after drying at 240 ° C for 2 hours must have a dry weight loss of less than 3% by weight. Wood [22] A method for preparing a spandex fiber which is resistant to fading and chlorine, and the ruthenium step comprises the steps of removing the crystallization water by drying the aluminum magnesium carbonate at a high temperature iStrc to 2503⁄4, and adding aluminum magnesium carbonate to the spandex. The spinning step of the polymer. [23] The aluminum magnesium carbonate material is preferably a 〇% to 10% melamine compound. € [24] The method for preparing the anti-blocking and anti-chlorinated spandex is described in detail below. [25] In explaining the present invention, it should be understood that the specifications used in the present invention are only considered in terms of their functions, but the meaning thereof can be modified according to the contents of the technology, and is not limited to the functions. ® [26] According to the present invention, in order to prevent the fading of the spandex produced by the spinning process at a high temperature of 200 ° C, the magnesium carbonate of 0.1% to 10% of the melamine slope compound must be heat treated to remove the water of crystallization, and then The reagent which is further added to the polymer for spinning 'aluminum magnesium carbonate may include a fatty acid, a fatty acid ester, a fatty acid salt, a phosphonic acid ester. ), styrene/maleic acid anhydride copolymer and its derivatives, silane coupling agent, titanate coupling agent, polyorganism Burning (polyorganosiloxane),? Inflammatory organic hydrazine (P〇ly〇rgan〇 hydrogen siloxane) and melamine 1281524 (melamine) compound. The preferred coating material is excellent in heat resistance to β, because in the process of heat treatment to remove the magnesium carbonate crystal water, the ruthenium can be fading, and only the melamine compound coated with the sputum acid . Bamboo is not [27] In order to prevent the high temperature spinning process above 200 °C, the smelting of smothers, the aluminum sulphate coated with melamine must be crystallized with hot gram, and then added to the spandex polymer. In this way, the two products are: The Dexter polymer has excellent anti-fading and chlorine resistance. Pan [28] The invention is used to prepare spandex aluminum magnesium carbonate (1): ... subformulae such as M2+xAlm(〇H)y (Αη·)ζ (1) Μ2+ represents magnesium ion (Mg2+) or Word Ζ(Ζη2+), Αη- represents any anion having η valence, x&y represents a number of 2 or more, 2 and m represent a positive number, Αη represents OH., F-, Cl·, Br' NCV, One of S042·, CH3C〇〇-, C〇32-, Hp〇4, Fe(CN)63·, oxalate i〇n, and salicylate ion (saliCyiate丨011). The aluminum magnesium carbonate formula of the spandex fiber produced in the present invention is represented by the following compounds (2) to (5).

Mg45Al2(〇H)13C03 -... (2)

Mg6Al2(〇H)16C03 -... (3)

Mg8Al2(OH)2〇C〇3 ---- (4)

Mg4 Al2(0H) 12CO3 ---- (5) [29] The above-mentioned aluminum magnesium carbonate formula indicates that the inner layer of crystal water has been removed. Preferably, the β [30] melamine compound may comprise a melamine compound, a Phosphorus-combined melamine compound, a triammonium uranium urate 1281524 compound (melamine cyanurate). Compounds), an organic acid-substituted dicyanamide compound, an organic acid-substituted melamine-containing compound, and an organic acid-substituted melamine cyanurate compound, the above-mentioned compounds may be used singly or in combination. [31] The melamine compound may comprise methylene dimelamine, ethylene dimelamine, trimethylene dimelamine, tetramethylammonium dimelamine, tetramethylammonium double melamine

(tetramethylene dimelamine), hexamethylene dimelamine, decamethylene dimelamine, dodecamethylene dimelamine, 1,3-cyclohexene double

(p-phenylene dimelamine), p-xylene dimelamine, diethylene trimelamine, triethylene tetramelamine, tetraethylene pentamelamine, hexaethylene sulfonate Hexaethylene heptamelamine and melamine formaldehyde and the like. [32] A melamine compound combined with phosphorus, which may comprise a compound in which melamine is combined with _phosphoric acid or a phosphate group, such as dimelamine pyrophosphate, melamine primary phosphate, melamine primary glycerate A compound which reacts with bis-(pentaerythritol phosphate) phosphoric acid, such as melamine secondary phosphate, melamine polyphosphate, melamine salts, and the like. [33] Melamine cyanurate compound, which may comprise unsubstituted or at least one substituent is methyl, phenyl, carboxymethyl, 2-methylmethyl ), cyanomethyl 11 1281524 (cyanomethyl), 2-cyanoethyl melamine cyanurate compound.

[34] The melamine cyanurate compound may be substituted with various organic acids, and the organic acid having a carboxyl group may comprise an aliphatic mono-carboxylic acid such as caprylic acid or undecanoic acid. ), lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, Stearic acid, nonadecanoic acid, eicosanoic acid, behenic acid, adiphatic dicarboxyl acid such as malonic acid ), succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaric acid, Sebasic acid, 1,9-nonanedicarboxyl acid, 1,10-decanedicarboxyl acid, 1,11-undecanoic acid (1,11 -undecanedicarboxyl acid) 1,12- dodecanoic acid (1,12-dodecanedi Carboxyl acid) U3-tridecanedicarboxyl acid or 1,14-tetradecanedicarboxyl acid, aromatic monocarboxylic acid such as benzoic acid , phenylacetic acid, alpha-naphthoic acid, beta-naphthoic acid, cynnamic acid, p-amino hippuric acid ^ (4-(2-thiazo(l)ylsulfamyl)-phthalaninoic acid, aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid, sarcophagus Phthalic acid, aromatic tricarboxylic acid such as trimellitic acid, 1,3,5-benzenetricarboxylic acid 12 1281524 (1,3,5-benzenetricarboxylic acid), tris (2-carboxy ethyl) isocyannurate ' aromatic arornatic tetracarboxylic acid such as pyromellitic acid, biphenyltetracarboxylic acid ' direct bond ί 一 一 叛 叛 (al Iphatic cyclic monocarboxylic acid), such as cyclohexane carboxylic acid, a linear cyclic dicarboxylic acid such as 1,2_cyclohexane dicarboxylic acid ° [35] the present invention The content of the medium aluminum magnesium carbonate coating agent is 0.1% to 10% by weight of the aluminum magnesium carbonate. If the weight percentage of the coating agent is less than 〇·1%, the drape effect can be neglected, and if it is greater than 10%, Increase manufacturing costs and the effect will not be enhanced. [36] A method of coating aluminum magnesium carbonate particles, comprising adding a coating agent of 〇·%% to 1% by weight to a solvent such as water, alcohol, diethyl ether or 1,4-dioxane, and then adding Magnesium aluminum carbonate, the solution is stirred while heating from 50 ° C to 170 ° C, and if necessary, a high pressure reactor can be used. The drape reaction lasts for 30 to 120 minutes and is filtered and dried to obtain magnesium aluminum carbonate. Another coating method is a physical mixing method in which a mixture of a melamine compound and an aluminum magnesium carbonate is mixed by a high speed mixer and dried. [37] The coating prevents the aluminum magnesium carbonate from absorbing too much moisture and improves the dispersion of the magnesium aluminate in the polymer, so that it can avoid the deterioration of the spinning quality caused by the gelation. The melamine-coated aluminum magnesium carbonate does not fade even during the heat treatment to remove the crystal water, mainly because the melamine compound has excellent heat resistance. It is important that the aluminum magnesium carbonate material after removal of the water of crystallization must be packaged immediately to reduce the time of contact with air and to avoid direct absorption of moisture. If the temperature of the heat treatment is higher than 300 ° C, the magnesium aluminum carbonate may change its structure or the surface of the material may fade, so the temperature is of considerable importance for fading and structural changes. The details of the invention will be described in the following 13 1281524 [39] The invention is characterized in that the water of crystallization in the magnesium aluminocarbonate is removed at a certain temperature, and the water of crystallization of the aluminum magnesium carbonate is not only present on the surface. The inner layer of the material also has the presence of crystal water. The content of the inner layer of crystal water is about 12%. The inner layer of crystal water generally indicates water which can be removed by heating in the conventional oven method to 180 to 250 ° C. If it is dried below 180 ° C, The time for removing the crystal water will be too long, but if it is dried above 300 ° C, the crystal structure of the carbonated town will disintegrate to form magnesium or the oxide of the name. In the spinning process, if the temperature of the cavity is maintained between 200 and 300 ° C for evaporation and recovery of the solvent, it is found that in this temperature range, the 0 polymer material containing the inner layer of crystalline aluminum aluminum carbonate will be discolored. However, the crystal water on the surface of the magnesium aluminum carbonate evaporates at 10 ° C, and does not discolor the fibers during the spinning process. [40] Therefore, the optimum temperature for removing the crystalline water of the aluminum magnesium carbonate inner layer is between 180 and 250 ° C. If it is lower than 180 ° C, the time for removing the crystal water will be too long, but if it is higher than 250 ° C Dry, aluminum magnesium carbonate coating material may fade or decompose. [41] Any method of heating or drying aluminum magnesium carbonate can be used as long as the temperature is maintained above 180 ° C. These methods can include convection, conduction, radiation, etc., and microwave or vacuum heating drying methods can also be used. [42] A square formula for verifying whether the crystallization water of the aluminum silicate inner layer is actually removed, which is the weight reduction ratio of the relatively dry aluminum magnesium carbonate and the additionally dried aluminum magnesium carbonate, if it is at 240 ° C After the drying for 2 hours, the rate of weight reduction is less than or equal to 3%, it can be assumed that the inner layer of crystal water has been removed (to check whether the inner layer of crystal water is removed). If the crystallization water of the aluminum magnesium carbonate inner layer is not removed, the rate of decrease in weight under the above conditions will be greater than 12%, and the reason why the inner layer crystallization water is removed at a weight reduction rate of 3% or less is to The inner layer of crystal water of magnesium strontium silicate has been removed, but the dried aluminum magnesium carbonate absorbs moisture immediately after contact with air, so the heat-treated aluminum magnesium carbonate is preferably packaged in an aluminum sealed bag to prevent it. Absorb moisture. 14 1281524 [43] In the air, the heat-treated unsloped Ilu carbonate town absorbs moisture more easily and quickly than the overlying magnesium. Therefore, the coated aluminum magnesium carbonate material is more suitable for use and storage. According to the present invention, the content of magnesium aluminum carbonate is preferably from 0.01% to 10% by weight of the total fiber. If the content is less than 〇·1%, the chlorine resistance is negligible. If the content is higher than 10 〇/〇, the fiber is The excessive inorganic content will result in a decrease in strength, ductility and modulus. [44] The average particle diameter of the aluminum magnesium carbonate according to the present invention is preferably equal to or less than 10 μm, preferably less than 5 μm, in spinning. During the process, magnesium magnesium carbonate having an average particle size of more than 10 μm will cause packaging pressure and the risk of sand damage. [45] The present invention relates to a polyurethane polymer used in the preparation of spandex fibers, as is well known in the art, according to the preparation method of polyurethane, first with organic isocyanate and The polymer glycol is reacted to obtain a precursor, and the precursor is dissolved in an organic solvent and reacted with a diamine or a monoamine to obtain a polyurethane-urea polymer (46). Organic diisocyanate, which may contain diphenylmethane-4,4'-isocyanate, hexamethylene isocyanate Toluene diisocyanate, butylene isocyanate, p-methylene diisocyanate, and the like. The polymer diol may include polytetramethylene ether glycol, polypropylene glycol, polycarbonate diol, and the like. Diamines as chain extenders may contain ethylene diamine, propylene diamine, hydrazine and the like. The monoamines as a chain terminator may contain 15 1281524 diethyl amine, mono-ethanol amine, dimethyl amine and the like. [47] The phenol compound stabilizers of the present invention comprise benzofuranone, semi-carbazide, benzotriazol compounds, amines (amines). The compound stabilizers comprise a polyurethane having a tertiary nitrogen atom and a polydialkylaminoalkyl methacylate which can be added to the spandex.

In the polymer, the fading and deterioration of the spandex fiber caused by UV light, smoke, and heat treatment are prevented. [48] The spandex fiber according to the present invention may further comprise titanium dioxide, such as stearate, and magnesium stearate (magnesium additive. The degree of the spandex color is added to the spandex high. Titanium dioxide in the molecule, which accounts for 0.1% to 5% by weight of the polymer, is added to the spandex town of stanndex, which is 0.1% by weight of the spandex fiber, depending on the characteristics of the improved spandex unwinding. It is to be understood that the general description and details of the present invention are merely illustrative, and that the claimed invention will be further described. Embodiments Embodiment 1 to Embodiment 4. [5] 518] 518 g of diphenylmethane-4, 4-diisocyanate and 2328 g of tetramethylene ether glycol (polytetramethylene-ether glyco molecular weight U00) The mixture was stirred under nitrogen for 8 minutes at 90 ° C to obtain a polyurethane prepolymer (p〇lyuretha plus prepolymer), and the polyurethane prepolymer was cooled to room temperature, and then keke 16 1281524 dimethylacetonitrile was added. Amine Thylacetamide) to obtain a polyurea S prepolymer solution containing 34.4 g of ethylene diamine, 10.6 g of propylene diamine, and 9.1 g of diethyl diamine. A mixed solution of methyl acetamide is added to the polyurethane prepolymer solution at 10 ° C to obtain a polyurethane urea solution. [51] Based on the total weight of the polyurethane solution, 1.5% of ethylene Bis(oxyethylene) bis-(3-(5-t-butyl-4-hydoroxy-m-toil)-propionate), 0.5% 5?7-di-t-butyl-3-(3,4-dimethyl phenyl) )-3H-benzofuran-2-one '1% 1,1,1 ',r-tetramethyl-4-4'-(methylene-di-p-phenylene)disemicarba zide, 1% p〇ly(N, N-diethyl-2-aminoethyl methacrylate), 0.1% titanium dioxide, 0.5% magnesium stearate, and aluminum magnesium carbonate as shown in Tables 1 and 2, added together to polyamine A urea solution (p〇lyUrethane-urea) for spinning applications was prepared. [52] Prior to the addition of the additives mentioned above, the additives were uniformly dispersed in dimethyl acetamide solvent using an Advantis V3 instrument manufactured by Drais Mannheim, Germany. [53] After the defoaming of the polyurethane urea solution, the solution was prepared by a dry spinning machine with 4 〇D/4f spandex fibers, and the upper half of the body was controlled at 250 ° C. The physical properties of the obtained fibers are shown in Table 1. And Table 2. ~ [54] <Corrosion resistance test> Test of strength retention in chlorine water··Extended 5〇% of spandex treated with water 4.2, 97 C to 98 °C ·) for 2 hours and at room temperature After cooling, Spandex was immersed in 45 liters of 3.5 ppm chlorine-containing chlorine water (pH 7.5) for 24 hours, and the strength retention of the spandex was analyzed. 17 1281524 * Strength retention rate (%) = S/S〇X 1 〇〇S〇: strength before treatment, S: strength after treatment * by Instron 4301 ( Instron Co., USA) measured the intensity with a sample length of 5 cm and a cross head rate of 30 mm/min. <Method for checking whether or not the magnesium silicate inner layer crystallization water is removed> [55] Whether aluminum magnesium carbonate containing the inner layer crystallization water is added to the polyurethane urea solution, and the weight of the aluminum magnesium carbonate after drying at 240 ° C for 2 hours To decide. (i) Weigh the aluminum foil for 30 minutes and weigh it one by one (A) (ii) Weigh the aluminum foil together with the sample (B) (iii) Dry the aluminum foil in an oven at 240 °C ± 5 °C for 2 hours. (iv) The sample is weighed immediately after it is taken out of the oven - (c) (v) The amount of dry weight loss is calculated by the following formula

Loss on drying (%) = [1 - (C - A) / (B - A)] X 100 (vi) If the dry weight loss is equal to or less than 3%, the inner water can be considered to have been removed. Pandex's method of yellowness> [56] Spandex's yellowness value "b" is measured by Color-view spectrophotometer (BYK-Gardener Co., US) (test parameters: Instrument Geometry = 450 / 00, Illuminant / Observer = D65/100, the sample port aperture is 11 mm and the number of detections is 3). 18 1281524

Table 1

Example 1 Example 2 Example 3 Example 4 CC Stearic acid substituted melamine poly phosphate Stearic acid substituted melamine Melamine cyanurate Melamine pyrophosphate CA 3 wt% 3 wt% 3 wt% 3 wt% Hy Mg6A12(OH)16 C03 Mg6A12(OH)16 C03 Mg4 .5A12(OH)13 C03 Mg4.5A12(OH)l 3C03 A.Hy 4 wt% 4 wt% 4 wt% 4 wt% SRR 94% 93% 92% 92% Yv -0.7 -0.4 -0.5 -0.5 Sw 0.01 0.01 0.02 0.01

Table 2

Comp. 1 Comp.2 Comp.3 Comp.4 Comp.5 CC Stearic acid Strearic acid substituted poly phosphate Melamine cyanurate none None CA 3 wt% 3 wt% 3 wt% None None Hy Mg 6A1 2(OH)16 C03 Mg 6A1 2(0H)16C03'5 H2〇Mg 4.5A1 2(0H)13C03'3.5 H20 Mg 6A1 2(〇H)16G 03 Mg 4.5A1 2(OH)13(CO3)0 .800.2 A.Hy 4 wt% 4 Wt% 4 wt% 4 wt% 4 wt% SPR 92% 85% 85% 86% 77% Yv 6.1 10 11 -0.3 -0.3 Sw 0.01 0.01 0.02 3 5

Note: C.C: Coating material C.A: % by weight (based on the total weight of magnesium aluminum carbonate)

Hy: hydrotalcite A.Hy: percentage of magnesium aluminum carbonate (based on the total weight of spandex) SPR: spandex strength retention after 24 hours of treatment with chlorine water hundred 19 1281524 ' % Υ·ν : bobbin's yellowness value (b value) Sw: number of filament breakage during spinning per hour * The smaller the "b" value, the less the bobbin will not be colored [57] As shown in Tables 1 and 2, If aluminum magnesium carbonate is used to remove the inner layer of crystal water and the melamine compound, the spandex will not fade or have excellent chlorine resistance even in the spinning process above 200 °C. If the water is not covered with aluminum magnesium carbonate, fading will not occur, but the efficiency of spinning and the resistance to chlorine will be worse. [58] In particular, if the aluminum magnesium carbonate described in European Patent No. 1,262,499 A1, which has no partial, partial decomposition of carbonate ions and partial crystal structure disintegration, is used, the spinning efficiency and chlorine resistance will be more difference. The foregoing description of the present invention has been described by way of example only, but it should be understood that those skilled in the art can readily modify and modify the examples, and the scope of the invention is limited only by the claimed claims. [60] The present invention provides a method for preparing a spandex fiber having excellent fading resistance and chlorine resistance, and the spandex fiber prepared by the method can be used for making underwear, socks, and especially sports clothes, such as Swimsuits, etc. 20

Claims (1)

1281524 X. The scope of application for patents: ,, the second type of spandex fiber with excellent anti-fading and gas resistance, must have 3% of the total weight of spandex fiber, 铭1% to 1% of the town of Mingchao The aluminum magnesium carbonate involved in Chengguang is a melamine compound coated with 0.1% to ίο%, and the aluminum magnesium sulphate needs to be free of inner layer crystal water. 2. The spandex fiber according to item 1 of the patent application scope, wherein the molecular formula of Ilu magnesium carbonate is represented by (1): M2+xAlm(OH)y(An-)z (1) M2+ represents magnesium ion (Mg2+) Or zinc ion (Zn2+), An• represents any anion with n & ' represents a number of 2 or more, representing any positive number 'An- stands for OH-, F-, Cl-, Br-, N03-, S042- , CH3C00-, C032-, HP042_, Fe(CN)63-, oxalate ion, salicylate ion. 3. The spandex fiber according to claim 1, wherein the magnesium aluminum carbonate particles must have at least one of (2) to (5) as a representative: Mg 4.5A1 2(0H)13C03 ... -(7) Mg 6A1 2(0H)16C03 ..._ (3) Mg 8A1 2(OH)20CO3 ...-(4) Mg 4A1 2(0H)12C03 (5)· 4. As described in claim 1 Pandex fiber, wherein 'melamine compound must contain at least melamine compound' melamine compound, melamine cyanurate compound, melamine compound containing organic acid radical = phosphinate, and organic acid-substituted phosphorus-containing melamine Compound 3 is one of the compounds such as acid-substituted melamine cyanuric acid. 21 1281524 5. The spandex fiber according to claim 1, wherein if the inner layer of crystal water of magnesium aluminum carbonate is removed by drying at 240 ° C for 2 hours, the dry weight of the spandex fiber is removed. Will be less than or equal to 3%. 6. A method of preparing a spandex fiber having excellent resistance to fading and chlorine, comprising the steps of: mixing and subsequently drying a solution of magnesium aluminum carbonate and a melamine compound such that the magnesium aluminum carbonate is coated with a melamine compound, by 180 The coated aluminum magnesium carbonate is heated and dried at a temperature of 至C to 250 〇C to remove the crystallization water of the inner layer, and the obtained sloped aluminum magnesium carbonate containing no crystal water is added to the spandex polymer compound. And spinning a mixture of the generated spandex polymer compounds to form spandex fibers. 7. A method for preparing a spandex fiber having excellent resistance to fading and chlorine, as described in claim 6, wherein the magnesium aluminum carbonate involved is 0.1% by weight based on the total weight of the aluminum magnesium carbonate. 10% melamine compound. twenty two