KR100780602B1 - Chlorine resistant polyurethaneurea composition - Google Patents

Abstract

A polyurethaneurea elastic fiber, a method for producing the same, and a composition for the same are provided to improve the chlorine-resistant property and the spinnability of the polyurethaneurea elastic fiber, by using basic magnesium carbonate as a chlorine-resistant additive. A composition for a polyurethaneurea elastic fiber contains 0.1-1.0 wt% of basic magnesium carbonate as a chlorine-resistant agent. The basic magnesium carbonate is coated with a coating agent in a wet type or a dry type, or capsuled in the coating agent. The 0.1-1.0 wt% of coating agent is used based on the basic magnesium carbonate. The coating agent is one or more selected from fatty acid of C1-C30, fatty-acid metal salt, fatty-acid ester, fatty-acid phosphoric ester, silica, silane, polyorganosiloxane, and a mixture of polyorganosiloxane and polyorganohydroxygensiloxane.

Description

Chlorine Resistant Polyurethaneurea Composition

The present invention relates to a composition for producing a polyurethane urea elastic fiber having excellent anti-chlorine properties and uniformity, resistant to chlorine water in a swimming pool and interwoven with nylon to provide an excellent fabric quality, and an anti-chlorine polyurethane urea elastic fiber using the same.

Polyurethane urea elastic fiber is a polymer obtained by stretching the chain of isocyanate-end prepolymer synthesized from high molecular weight polyol and excess organic diisocyanate with diamine, mainly through dry and melt spinning to produce polyamide fiber or polyester fiber and It is interwoven with natural fibers and is used as a stretch material for various fields of clothing such as foundation, socks, pantyhose and swimwear.

However, polyurethaneurea elastic fiber is decomposed in the polyetherglycol structure forming the soft segment of the polymer by chlorine water bleaching or active chlorine for disinfection of the swimming pool, thereby deteriorating physical properties. Therefore, in order to improve the anti-chlorine properties of the polyurethane urea elastic yarn used in swimwear, polyurethane elastic yarn using polyester glycol has been produced. However, due to the high biological activity, the aliphatic esters were not easily attacked by the fungus, and the anti-chlorine was not satisfactory. Various anti-chlorine additives have been used to improve the anti-chlorine properties of polyether based polyurethanes. Japanese Patent No. 57-29609 and US Patent No. 4340527 used zinc oxide to improve anti-chlorine properties. However, zinc oxide has a problem of yellowing by reacting with additives and eluting under acidic dyeing conditions of pH 3-4. In particular, zinc has a problem that cannot be used as an environmental regulatory substance in Europe. In Japanese Patent No. 59-133248, hydrotalcite was used to improve anti-chlorine properties. However, the hygroscopicity of hydrotalcite used as an anti-chlorine additive caused a problem of increased gel formation, increased filter pressure and lower radioactivity of the polymer. Japanese Patent No. Hei 91-243446 improved the anti-chlorine properties of polyurethaneurea elastic yarn by using hydrotalcite coated with fatty acid to improve the water absorption prevention and dispersibility of the anti-chlorine additive. However, the used hydrotalcite reacts with additives for light resistance and gas resistance of polyurethane urea elastic yarn, causing yellowing during spinning. U.S. Pat.No.5626960 used a mixture of huntite and hydromagnesite to improve anti-chlorine properties. However, there is a problem in the generation and dispersion of the polymer of the polymer due to the moisture absorption of the material without using the coating agent increases the filter pressure and trimming rate in the spinning process, there was a problem that the final product yellowing.

An object of the present invention is to provide a composition for producing a polyether-based polyurethane urea elastic fiber excellent in anti-chlorine properties.

It is another object of the present invention to provide an additive composition having good compatibility with additives, anti-chlorine additives, and polyurethane urea, which are added to supplement anti-oxidation, light resistance, and waste gas stability of polyurethane elastic yarns, and polyurethane urea elastic fibers using the same. It aims to do it.

In order to achieve the object of the present invention, the present invention produces a polyurethaneurea elastic fiber using basic magnesium carbonate as an anti-chlorine additive. The basic magnesium carbonate used in the present invention may be used without coating, but it is more advantageous to use it by coating with organic and inorganic materials to improve dispersibility and to prevent moisture.

Anti-chlorine additive used in the present invention is selected from a mixture of C1 ~ C30 fatty acid, fatty acid metal salt, fatty acid ester, fatty acid phosphate ester, silica, silane, polyorganosiloxane, polyorganosiloxane / polyorganohydroxygensiloxane It relates to a composition for producing an anti-chlorine polyurethane urea elastic fiber, characterized in that it contains 0.1 to 10% by weight of basic magnesium carbonate coated with a dry or wet method of a species or two or more coating agents.

In another aspect, the present invention provides a polyurethane urea elastic fiber with improved anti-chlorine by adding a basic magnesium carbonate coated as an anti-chlorine additive together with other additives in the production of polyurethane urea elastic fiber.

The method for producing basic magnesium carbonate used in the present invention includes a soda ash method using a reaction of soluble magnesium salts such as magnesium chloride and sodium carbonate, a tannic method using a reaction of soluble magnesium salts and ammonium carbonate, magnesium hydroxide and carbonate And a gas method using a gas reaction.

Magnesium carbonate (expressed by the formula MgCO ₃ · nH ₂ O, typically n = 3), or magnesium bicarbonate (Mg (HCO ₃ ) ₂ ) obtained as an intermediate product by the reaction of a magnesium source and a carbonic acid source in the above method. ) Is aged for a long time to produce basic magnesium carbonate. 12.5 g of magnesium sulfate heptahydrate was mixed with 100 g of water at 85 ° C. to form an aqueous magnesium sulfate heptahydrate solution. 20 g of anhydrous sodium carbonate was mixed with 100 g of water at 85 ° C. to produce anhydrous sodium carbonate solution, and then added to an aqueous magnesium sulfate heptahydrate solution. The reaction proceeds by stirring for 1 hour while maintaining the temperature of 85 ℃. After the completion of the reaction, the product obtained by filtering and washing the solid content was dried to obtain basic magnesium carbonate. The basic magnesium carbonate obtained in the reaction was ground several times with a hammer mill or a jet mill in order to adjust the particle size to the required size. The finally obtained basic magnesium carbonate was agglomerated particles consisting of flaky primary particles having a thickness of 0.01 to 0.2 µm and a diameter of 0.1 to 2 µm, and the average particle size of the aggregated particles was an irregular shape of 0.5 to 15 µm.

The basic magnesium carbonate coating method includes a dry method and a wet method. In the dry coating method, stearic acid is coated with 100 parts by weight of stearic acid in an amount of 3 parts by weight for 20 minutes in a supermixer at a temperature of 110 ° C. at 500 rpm for preparing basic magnesium carbonate coated with stearic acid. In the wet coating method, 600 parts by weight of water was added to 100 parts by weight of basic magnesium carbonate, and the mixture was stirred well. Then, 3 parts by weight of stearic acid dissolved in ethanol was added and reacted with stirring at 90 ° C. for 30 minutes. After the reaction was completed, filtered, and heated to 150 ℃ dried to prepare a basic magnesium carbonate coated with stearic acid.

The coating agent is used in an amount of 0.1 to 20 parts by weight based on the weight of basic magnesium carbonate, an anti-chlorine additive. More preferably, it is used in 1-10 weight part.

The basic magnesium carbonate used in the present invention is represented by the structure of the following formula (1).

_{^{M 2 + x (A n-)}} y M 2 + (OH) z · mH 2 O [ Chemical Formula 1]

(Wherein, M ^{2 +} is Mg ^{2 +} or Ca ^{2 +,} and A ^n- is CO ₃ ^{2 -} a, x is 1 ~ 5, y is 1 ~ 5, z is 0 ~ 2, m is 0 to 5. )

More specifically, it may be represented by the following Chemical Formulas 2 to 6. In particular, hydromagnesite, dihydromagnesite, magnesite and the like can be used.

Mg ₄ (CO ₃ ) ₄ Mg (OH) ₂ 4H ₂ O [Formula 2]

Mg ₃ (CO ₃ ) ₃ Mg (OH) ₂ · 3H ₂ O [Formula 3]

Mg ₄ (CO ₃ ) ₄ Mg (OH) ₂

Mg ₃ (CO ₃ ) ₃ Mg (OH) ₂ [Formula 5]

MgCO ₃ [Formula 6]

The size of the basic inorganic average particle | grains used for this invention is 10 micrometers or less, It is good to use what is 3 micrometers or less more preferably. If the size of the particles exceeds 10㎛ the milling process is performed more during the additive slurry production, the heat history of the anti-chlorine material is increased. In the case of using a thermal history additive, the color of the final product may turn gray (a value lower), resulting in poor product quality and economic loss of energy. In addition, since the trimming rate of the spinning is increased, the size of the inorganic particles used for the continuity of the spinning and the stability of the production should be 10 µm or less, and more preferably 3 µm or less, which is advantageous for the process application.

The basic inorganic material used as anti-chlorine material has secondary aggregation in polar solvents such as N, N-dimethylacetamide and N, N-dimethylformamide, which are used for the production of polyurethaneurea elastic yarn, May cause trimming. Therefore, the basic magnesium carbonate used in the present invention is coated with an acidic or neutral coating agent to adjust the pH of the anti-chlorine material to about 7-9 neutral or weakly basic to lower the basicity of the material and the charge of the surface to reduce the secondary aggregation of the material. It can reduce the occurrence. In addition, by preventing the absorption of moisture due to the storage of the material and exposure to the outside air, the problem of suppressing the gel generation in the dope, the rise of the pressure of the spinneret and the generation of the trimming during the spinning were solved, and the coloring and discoloration of the yarn after the spinning can be suppressed.

In addition, the anti-chlorine additive of the present invention can increase the activity through heat treatment. The treatment may be performed at a temperature of 300 ° C. or lower to remove some of the epidermal or crystallized water, or may be heat treated at 400 ° C. or higher to completely remove the crystallized water to increase activity.

The coating agent usable in the anti-chlorine material of the present invention is one selected from fatty acids, fatty acid esters, fatty acid metal salts, fatty acid phosphate esters, silica, silanes, polyorganosiloxanes, polyorganosiloxanes / polyorganohydrogensiloxanes, or It may be used by coating in an amount of 1 to 20 parts by weight based on basic magnesium carbonate by a dry or wet method in two or more kinds.

More specifically, the coating agent may be a higher fatty acid such as stearic acid, oleic acid, palmitic acid, lauryl acid or higher alcohols such as stearyl alcohol, oleyl alcohol, lauryl alcohol, and the like, and glyceryl as the fatty acid ester. Monostearate, stearyl oleate, lauryl oleate, etc. may be used, and the fatty acid metal salt may be sodium stearate, magnesium stearate, calcium stearate, sodium oleate, sodium palmitate, or lauric acid. Sodium, sodium lauryl sulfonate, and the like may be used, and the fatty acid phosphate ester may include stearyl phosphate, oleyl phosphate, lauryl phosphate, tridecyl phosphate, or butyl acid having a linear or branched alkyl group having 4 to 30 carbon atoms. Phosphate may be used, and the silica may include calcium silicate silicate (Tongyang). Steel Chemical No. 3) may be used, and as the silane, a compound having the formula (R'O) ₃ SiR "(R ', R" is the same or different aliphatic or aromatic hydrocarbon having 1 to 40 carbon atoms), Polydimethylsiloxane may be used as the organosiloxane, and polydimethylhydrogensiloxane may be used as the polyorganohydrogensiloxane.

Coating of the material can be carried out by wet and dry methods. In the wet method, a coating agent may be added to a slurry of basic magnesium carbonate particles in a liquid phase or an emulsion phase, mixed sufficiently, and then dried. In the dry process, the basic magnesium carbonate particles are sufficiently mixed with a liquid such as an emulsion or solid form while sufficiently stirring with a mixer such as a supermixer or Henschel mixer, and mixed sufficiently under heating or non-heating.

The anti-chlorine material of the present invention can be treated by coating and encapsulation to improve moisture absorption prevention and dispersibility. Typical coatings are methods of attaching organic and inorganic coatings to only a portion of the anti-chlorine surface, and encapsulation is a method of attaching inorganic coatings to the entire surface of the anti-chlorine material. Nanoporous micropores are distributed on the surface of the capsule so that the anti-chlorine agent inside can react with the active chlorine. When the capsule coating on the anti-chlorine material can improve the problem that the anti-chlorine material is eluted in an acid salt bath under the acid dyeing conditions of pH 3-4 of the post-processing.

In the present invention, when the basic magnesium carbonate is used without coating, moisture absorption of the material may easily occur. Therefore, careful moisture management is required from the packaging stage of the product to the use of moisture-proof packaging and storage before use. In addition, in the case of introducing a facility for drying the material in the final step, it can be used without coating. Alternatively, anti-chlorine may be dispersed in DMAc solvent in advance to prepare a slurry, and then stored in a drum to prevent water absorption and directly added to an additive slurry preparation tank in the field. However, when the material is used without coating, the problem of secondary aggregation due to the surface charge of the anti-chlorine material, inconvenience in handling the material, and the cost of water management are required. Therefore, it is more preferable to coat the anti-chlorine material with the coating agent of the present invention. Do.

Basic magnesium carbonate, which is the anti-chlorine additive in the present invention, is very important for moisture management. Due to the moisture absorbed by the anti-chlorine material, a problem of gel generation and poor dispersion occurs in the secondary polymer, which results in an increase in the filter pressure of the process and an increase in the trimming rate of spinning. In addition, when the anti-chlorine material is coated in less than 1 part by weight, it is impossible to expect sufficient moisture absorption and sufficient dispersion effect when preparing the slurry, and in the case of more than 20 parts by weight, the dispersion effect of the anti-chlorine material is increased more than when coated by 20 parts by weight or less. Since there is no economic aspect, it is preferable to use 1 to 20 parts by weight.

In the present invention, the amount of the basic magnesium carbonate to which the coating agent of fatty acids or silanes is attached is added in an amount of 0.1 to 10% by weight in the total dope solution. If less than 0.1% by weight, anti-chlorine performance does not meet the expectations, if more than 10% by weight anti-chlorine performance is increased, but the mechanical properties such as yarn strength, elongation, modulus, etc. is most preferable to use in the above range. . The coated basic magnesium carbonate added at this time is preferably dispersed by dispersing in N, N-dimethylacetamide solvent and pulverizing and dispersing it to be 40 탆 or less with a wet mill. More preferably, it is 20 micrometers or less.

In the present invention, the filterability of the additive slurry was measured to confirm the grinding and dispersion of the additive slurry. 1.5 kg of the additive slurry ground and dispersed by the wet mill was passed through a filter having a diameter of 25 mm and a pore of 20 μm at a pressure of 3 kg / cm 2. The management criteria for the pulverized and dispersed slurry are controlled when the amount of slurry passed is more than 85% of the input amount. The weight of the slurry passed through the filter is an important indicator of the working continuity of the polyurethaneurea elastic yarn spinning process. That is, the more slurry passed, the better the continuity of the operation in dry spinning.

Hydromagnesite to which fatty acids are attached in the present invention is an additive used in the conventional polyurethane urea elastic yarn An additive slurry composed of titanium dioxide, gas stabilizer, light stabilizer, antioxidant, radioactive enhancer and N, N-dimethylacetamide solvent is pulverized and dispersed with a high performance wet mill to make the particle size of the inorganic additive in the slurry less than 10 μm. After that, the average particle size is preferably made to be 3㎛ or less, and then added to the dope and spun by dry spinning, it is also possible to produce a polyurethaneurea anti-chlorine elastic fibers.

Hereinafter, a method of preparing the composition of the present invention will be described in detail.

Polytetramethylene ether glycol (PTMEG, molecular weight 1815) and diphenylmethane-4,4'-diisocyanate (MDI) were charged / polymerized at a molar ratio of 1.70 (NCO / OH = 1.70) and 3.0 mol of unreacted diisocyanate at the end. The primary polymer is prepared to be% or less. The primary polymer is uniformly dissolved in N, N-dimethylacetamide (DMAc) to prepare a primary polymer mixture in which the content of unreacted diisocyanate is constantly controlled. Ethylenediamine, 1,2-diaminopropane (propylenediamine) as a chain extender, and diethylamine as a chain stopper were dissolved in N, N-dimethylacetamide, and then introduced into a secondary polymerizer together with the primary polymerization mixture. After obtaining the secondary polymer (35% by weight), the secondary polymer was composed of 4% by weight of titanium dioxide, a gas stabilizer, an antioxidant, a dyeing enhancer, magnesium stearate and hydromagnesite, and 10% by weight of a N, N-dimethylacetamide solvent. Hereinafter, a slurry having a solid content is added. The slurry is subjected to a grinding and dispersing process using a wet grinding device so that the particle size of the inorganic additive in the slurry is 10 μm or less, and then introduced into the process. After the spinning dope is passed through a pipe-type stationary mixer, the additive slurry and the secondary polymer are uniformly mixed, and the dope is dried at a spinning nozzle direct temperature of 240 to 255 ° C. and a spinning speed of 700 to 1200 m / min. Spinning to prepare a polyurethane urea anti-chlorine yarn. After spinning, the amount of residual solvent of spandex yarn is adjusted to 1.0 wt% or less. In this case, the inherent viscosity measured at a concentration of 0.5 g per 100 ml of N, N-dimethylacetamide was 1.25.

Polyurethane urea anti-chlorine yarn prepared by the above method is excellent in uniformity and radioactivity and can provide a good fabric quality of good elastic recovery, strong retention and anti-chlorine after dyeing process. The present invention is also included in the scope of the present invention the anti-chlorine polyurethane urea elastic fiber.

Prior to describing the embodiments of the present invention, various evaluation methods for property evaluation will be described.

1) Determination of the viscosity of the polymer

The polymer having completed the chain extension and the chain stop reaction was measured in a poise unit by measuring Brookfield® Viscometer, Type B at 40 ° C.

2) intrinsic viscosity measurement

The inherent viscosity of the polymer is measured by measuring the viscosity of a solution prepared at a concentration of 0.5 g of polymer per 100 ml of N, N-dimethylacetamide solution with a Uberod viscometer in a 30 ± 0.5 ° C. thermostat.

3) pH measurement of anti-chlorine material

After 2 g of the sample was dispersed in 25 ml of ethyl alcohol, the pH of the material was measured using a pH electrode. The pH of the material is controlled at about 7-9.

4) Breaking strength, breaking elongation

Using a tensile tester (manufactured by Instron Co., Ltd. UTM), the sample was pulled at a speed of 50 cm / min at 25 ° C. and 65% RH at a sample length of 5 cm to measure cutting strength (g / d) and cutting elongation (%).

5) Wet heat elastic recovery rate

After measuring between 10cm of the sample and processing it for 60 minutes under the steam atmosphere at 130 ℃ under 100% elongation, the length (Lw) recovered when the elongation is removed is measured and expressed as a ratio with respect to the length of the untreated sample. Larger heat resistance and less heat setability.

Wet Heat Elasticity Recovery Rate = [(20-Lw) / 10] × 100

6) dry heat strong retention

After the sample is treated for 1 minute in hot air at 180 ° C with 100% elongation, it is strongly measured in a tensile tester, and the ratio of the strength after dry heat treatment to the strength of untreated yarn is a strong retention rate, and the higher the retention rate, the higher the heat resistance.

7) Anti-chlorine of yarn

The sample was 50% elongated and deposited in a bath of 20 ppm of effective chlorine concentration at pH 7, making the ratio of potency according to 24, 48 and 72 hours, respectively, a strong retention rate. In addition, the elastic recovery rate is measured by measuring the length of the sample before and after chlorine treatment. The higher the recovery rate, the higher the anti-chlorine.

8) Anti-chlorine of the fabric

The specimen fabric was made in 20 cm × 2 cm in the inclined direction, and 50% elongated was deposited in a bath at 25 ° C with pH 7 and 200 ppm of effective chlorine concentration. The higher the value, the higher the anti-chlorine properties.

9) Determination of gel particle number of polymer

The polymer was dissolved in 0.5% of 1% LiCl DMAc electrolyte and the number of gels present in the polymer was measured using a Coulter counter.

10) Radioactivity Measurement Method

Spinning is performed for 24 hours, indicating the number of trimmings as a fraction of the total number of windings.

11) How to measure yarn color

The surface of the spandex winding body is measured three times with a spectrophotometer (Minolta CM-508D) to determine the L / a / b value of the yarn.

12) Measuring method of filterability of additive slurry

1.5 kg of the additive slurry ground and dispersed by the wet mill was passed through a filter having a diameter of 25 mm and a pore of 20 μm at a pressure of 3 kg / cm 2. When the amount of slurry passed is more than 85% of the input amount, it is added to the process.

Examples are as follows and the present invention is not limited to these examples.

Example 1

Polytetramethylene ether glycol (PTMEG, molecular weight 1815) and diphenylmethane-4,4'-diisocyanate (MDI) were charged / polymerized at a molar ratio of 1.70 (NCO / OH = 1.70) to give unreacted diisocyanate at the end of 3.0. The primary polymer is prepared to be mole% or less. The primary polymer was uniformly dissolved in N, N-dimethylacetamide (DMAc) in a high performance dissolver to prepare a primary polymer mixture in which the content of unreacted diisocyanate was controlled to 2.64 ± 0.02 mol%. Ethylenediamine, 1,2-propylenediamine, and chain stopper diethylamine as chain extender were dissolved in DMAc and introduced into the secondary polymerizer together with the primary polymerization mixture. A polymer containing% solids having an apparent viscosity of about 2000 to 3500 poise at 40 ° C. was obtained, and the intrinsic viscosity of this polymer was measured at a concentration of 0.5 g per 100 ml of solution in N, N-dimethylacetamide. Was 1.0.

Polyurethane urea secondary polymer polymerized by chain extender and chain stopper maintains durability and whiteness during washing and use, improves discoloration resistance (prevents yellowing), improves stainability, and damages mechanical properties. 0.50% by weight titanium dioxide, 1,1,1 ', 1'-tetramethyl-4,4' (methylene-di-) based on the total weight of spandex fiber spun to prevent or reduce and improve durability against chlorine 1,3,5-tris (4-t-butyl-3-hydroxy-2), which is a hindered phenol compound, 0.50% by weight of p-phenylene) disemicarbazide waste gas stabilizer (HN-150, Nippon Hyrazine) , 6-dimethylbenzene) -1,3,5-triazine -2,4,6- (1H, 3H, 5H) - one of the tri-cyano Knox (CYANOX) 1790 ^® American Cynamid Co., Ltd.) 1.44 parts by weight of an antioxidant %, 0.30% by weight of magnesium stearate (Japan, Japan and Japan), poly (N, N-diethyl-2-aminoethyl Methacrylate), a dyeability improving agent 0.51% by weight of hydro-magnesite (Nanotech Co., ceramics, Airlite-S1) 4.0% by weight having an average particle size of less than 10㎛ stearate as an anti-inflammatory additive sintering was coated with 3 parts by weight of a dry process was added. The additive slurry was ground and dispersed with a wet mill so that the size of the inorganic particles was 10 μm or less. In order to grind the inorganic additive in the additive slurry, the grinding process was performed using a wet mill until the average particle of the inorganic material was 10 µm or less, and the slurry test was carried out using a 20 µm filter, followed by the introduction into the process. At this time, since uniform mixing of the final polymer and the additive is important, a cylindrical pipe static mixer was used to uniformly mix the additive and the final polymer. The polyurethaneurea product thus prepared gave a polymer solution containing about 35% solids and having a viscosity of 4350 poise (40 ° C.), a viscosity suitable for spinning.

The additive slurry mixed with the final polymer was kept at 45 ° C. Polyurethane elastic fibers were produced at a speed of 900 m / min using dry spinning to evaporate the solvent while pushing a predetermined amount of the spinning polymer solution into a spinning cylinder having an atmosphere of 250 ° C. using a gear pump. Table 2 shows.

Example 2

An elastic yarn was prepared in the same manner as in Example 1 except that stearic acid was wet-coated (nanotec ceramics, Airlite-S2) on hydromagnesite having an average particle diameter of 10 μm or less as an anti-inflammatory material.

Example 3

An elastic yarn was prepared in the same manner as in Example 1, except that hydromagnesite (Nanotec Ceramics, Airlite-S3) having an average particle diameter of 10 μm or less was used as an anti-inflammatory material.

Example 4

An elastic yarn was manufactured in the same manner as in Example 1 except for using 2% by weight of hydromagnesite (Nanotech Co., Ltd., Airlite-S1).

Comparative Example 1

An elastic yarn was manufactured in the same manner as in Example 1 except that the anti-chlorine material was not added.

Comparative Example 2

An elastic yarn was manufactured in the same manner as in Example 1, except that 4 wt% of hydrotalcite (DHT-4A, manufactured by Kyogawa Co., Ltd.) was added instead of hydromagnesite.

Comparative Example 3

An elastic yarn was manufactured in the same manner as in Example 1, except that 4% by weight of magnesium hydroxide was added instead of hydromagnesite.

Table 1

TABLE 2

Reference) b; At 7 or more, yellowing of the yarn was observed.

As can be seen from the above examples and comparative examples, the elastic fiber according to the manufacturing method of the present invention is very excellent in anti-chlorine and spinning properties.

Polyurethane urea elastic fiber prepared by the present invention is excellent in anti-chlorine and spinning properties and can provide a good fabric with good anti-chlorine, elastic recovery rate and strong retention of the fabric after dyeing process.

Claims (10)

In the composition for producing a polyurethane urea elastic fiber containing a polyfunctional alcohol and an isocyanate compound, One or two selected from C1 to C30 fatty acid, fatty acid metal salt, fatty acid ester, fatty acid phosphate ester, silica, silane, polyorganosiloxane, polyorganosiloxane / polyorganohydroxygensiloxane mixture A composition for producing an anti-chlorinated polyurethane urea elastic fiber, characterized in that it contains 0.1 to 10% by weight of basic magnesium carbonate coated or encapsulated by a dry or wet method. The method of claim 1, The coating agent is anti-chlorine polyurethane urea elastic fiber manufacturing composition, characterized in that the coating or capsule treatment using 1 to 20 parts by weight relative to the basic magnesium carbonate. The method of claim 1, A composition for producing an anti-chlorine polyurethane urea elastic fiber, characterized in that the structure of the basic magnesium carbonate is represented by the following formula (1). _{^{M 2 + x (A n-)}} y M 2 + (OH) z · mH 2 O [ Chemical Formula 1] (Wherein, M ^{2 +} is Mg ^{2 +} or Ca ^{2 +,} A ^n- is CO ₃ ^{2 -,} x is 1 ~ 5, y is 1 ~ 5, z is 0 ~ 2, m is 0 to 5 .) The method of claim 3, wherein The basic magnesium carbonate is any one or more selected from those represented by the following formula [2] ~ [6] composition for producing an anti-chlorine polyurethane urea elastic fiber. Mg ₄ (CO ₃ ) ₄ Mg (OH) ₂ 4H ₂ O [Formula 2] Mg ₃ (CO ₃ ) ₃ Mg (OH) ₂ · 3H ₂ O [Formula 3] Mg ₄ (CO ₃ ) ₄ Mg (OH) ₂ Mg ₃ (CO ₃ ) ₃ Mg (OH) ₂ [Formula 5] MgCO ₃ [Formula 6] The method of claim 4, wherein The basic magnesium carbonate is a composition for producing an anti-chlorine polyurethane urea elastic fiber, characterized in that any one or more selected from hydromagnesite, dihydromagnesite, magnesite. The method of claim 1, Anti-chlorine polyurethane urea elastic fiber, characterized in that the basic magnesium carbonate to remove the epidermal water or some of the crystal water by heat treatment at 150 ~ 300 ℃, or heat treatment at 400 ~ 800 ℃ to completely remove the crystal water. Composition for preparation. The method of claim 1, The composition for producing an anti-chlorine polyurethane urea elastic fiber, characterized in that the size of the average magnesium carbonate average particle size is 0.1 ~ 10㎛. Using a composition of any one of claims 1 to 7 wherein the spinning nozzle immediately below the spinning temperature of 240 ~ 255 ℃, spinning speed of 700 ~ 1200 m / min Polyurethane characterized in that the production of a polyurethane urea fiber Method for producing urethane urea elastic fiber. An anti-chlorine polyurethane urea elastic fiber using the composition of any one of claims 1 to 7. An anti-chlorine polyurethane urea elastic fiber produced by the manufacturing method of claim 8.