KR970010721B1 - Process for preparing antistatic electricity polyester fiber - Google Patents

Abstract

The polymer vessel that contains a polyethylene terephthalate oligomer 10[kg is kept to the temperature, 260 degree C, while the slurry produced by terephthalic acid and ethyleneglycol properly compounded, is fed to the vessel for 6 hours to produce 20[kg of an oligomer. And after being transferred 10[kg to another polymer, this oligomer is mixed with antimony trioxide, C12H2509(C2H40)40H, C12H25SO3Li and non reactive lithium amide, and the temperature is kept to 280 degree C.

Description

Manufacturing method of polyester maker

The present invention relates to an improved method for producing polyester yarns that have excellent antistatic performance but do not lose the advantages of ordinary polyester fibers.

Polyester fiber is attracting much attention for clothing because it has excellent properties such as heat resistance, chemical resistance, elongation, crystallinity, and flexural strength, but in low temperature and low humidity areas, it is lining, lingerie, foundation, and other dust-free clothing in winter. In order to use it as a special functional clothing such as sportswear, there is a problem in that dust is easily adsorbed and contaminated by the generation of static electricity due to friction, and shock is uncomfortable to the wearer. Many methods have been proposed to solve this electrostatic disturbance. There is a method of imparting antistatic function by using methacrylate or bisphenol in polyoxyalkylene glycol and post-processing by the plasma method, but this method has a disadvantage in that the antistatic property is sharply reduced after washing. In order to solve the problem of washing resistance and to impart permanent antistatic properties, a method of modifying a polymer using polyalkylene glycol and sodium alkyl sulfonate introduced in Japanese Patent Laid-Open Nos. 52-47071 and 52-47072 This has been used a lot lately. Sodium alkyl sulfonate has an advantage of introducing an ionic group into the polymer to promote charge transfer and to express excellent antistatic performance by synergistic action with the copolymer of polyalkylene glycol. However, sodium alkyl sulfonate is poor in dispersibility inside the polymer and causes a pack pressure increase during spinning. In addition, sodium metal salts may remain inside the spinning nozzles, resulting in poor spinning and shorter pack replacement cycles, resulting in poor spinning workability, poor dispersibility within the polymer, and inferior dyeing.

The present invention solves this problem and will be described in more detail as follows. The present invention is a polyester agent, characterized in that non-reactive lithium amide is used together with a polyoxyalkylene glycol compound and an unreacted alkylsulfonate lithium salt as a copolymerization component in preparing polymerization by adding a copolymerization component to a polyester. It relates to a method for producing a transfer.

In the present invention, the polyoxyalkylene glycol compound is particularly suited to the compound of formula (I) having a number average molecular weight of 2,000 or more and 30,000 or less. It copolymerizes in the terminal of. If the input amount is 0.01% by weight or less, the antistatic property is extremely low, when the 3.5% by weight or more, the basic physical properties of the yarn is lowered.

(Wherein, R _l: C ₁ ~C ₁₃ alkyl group or _{H, R 2: C 2 ~C} 16 alkyl group, n: an integer of 20-150)

The non-reactive lithium sulfonate salt used in the present invention is different from conventional sodium polyalkyl sulfonate, and it is particularly preferable to use non-reactive polyalkyl sulfonate lithium of the following general formula (II).

(Wherein, R _3: C ₃ ~C ₂₅ alkyl group or C ₇ ~C ₃₀ aryl group)

At this time, when the amount of lithium polyalkylsulfonate used is large, the content of DEG is high, so that when the polymer is discharged at the same melt viscosity, the intrinsic viscosity becomes high, so that the elongation is too low in the physical property, and in the case of less, the viscosity is difficult to decrease. Therefore, preferable addition amount is 0.01 to 2 weight%.

Non-reactive lithium amides characteristically used with the two compounds in the present invention are for example LiNH ₂ , [(CH ₃ ) ₃ Si] ₂ NLi, (C ₆ H ₁ ) ₂ NLi, [(CH ₃ ) ₂ CH ₂ ] NLi and the like, and the content is preferably 0.001 to 1% by weight compared to the polyester. If it is 0.001 weight% or less, antistatic property will fall, and if it is 1 weight% or more, it will cause a viscosity increase and a radiation failure. In addition, as generally known, thermal stability can be improved by adding 200-400 ppm of Sb ₂ O ₃ as a catalyst during condensation polymerization, adding 10-200 ppm of phosphorus compound as described below, and reacting for 2 hours.

_Wherein R _4-6 : H or an alkyl group

The present invention can be carried out through a conventional polymerization process and spin drawing process, the detailed description is omitted, and the polyester antistatic yarn obtained according to the present invention has excellent antistatic performance without compromising the intrinsic properties of the polyester fiber clothing It can be widely used for dragon and functional clothes.

An example is given and described below.

(Example)

(How to measure)

(1) Diethylene glycol (DEG) amount: Pyrolyse the polyester with hydrazine hydrate and measure this by gas chromatography.

(2) Resistivity: Measured by using an electric resistance measuring instrument of TOA of Japan in a constant temperature and humidity room.

(3) Friction band voltage, half-life: Measured using a Kanebo friction belt voltage meter.

* The specific resistance, friction voltage, and half-life were measured at 20 ± 2 ℃ and 40 ± 2RH% humidity.

Example 1

While maintaining a polymerization tank containing 10 kg of polyethylene terephthalate oligomer at 260 ° C., a slurry mixed with 8645 kg of terephthalic acid and 3875 g of ethylene glycol was added in 6 hours to prepare a 20 kg oligomer, and then 10 kg was transferred to another polymerization tank. 5 g of antimony trioxide, compound C ₁₂ H ₂₅ O (C ₂ H ₄ O) ₄₀ H 100 g and compound C ₁₂ H ₂₅ SO ₃ Li 10 g of general formula (II) and unreactive lithium amide (C ₆ H ₁₁ ) ₂ NLi 5g was added, and reacted at 280 ℃ to prepare a polyester of the present invention. The polymer obtained was dried in a conventional manner, and spun at a rate of 1000 m / min at 295 ° C. using a mold having 36 round spherical balls having a diameter of 0.25 mm. The obtained undrawn yarn was drawn at a drawing speed of 1070 m / min by a heating roller maintained at 80 ° C. and a hot plate kept at 120 ° C. to prepare a drawn yarn of 75 d / f, and the physical properties thereof were summarized in Table-1.

(Examples 2-3 and Comparative Examples l-3)

Except having made the composition of the copolymer component as Table 1, it carried out by the same method as Example 1, and evaluated the physical property.

Table 1

Claims (4)

In adding and copolymerizing a copolymerization component to polyester to impart antistaticity, a non-reactive lithium amide is used as a copolymerization component together with a polyoxyalkylene glycol compound and a non-reactive alkyl sulfonate lithium salt. Manufacturing method. The method of claim 1, wherein the non-reactive lithium amide is at least one selected from LiNH ₂ , [(CH ₃ ) ₃ Si ₂ NLi, (C ₆ H ₁ ) ₂ NLi, [(CH ₃ ) ₂ CH] ₂ NLi A method for producing a positive woven yarn of polyester, characterized in that 0.001 to 1% by weight relative to the polyester. The polyester agent according to claim 1, wherein the polyoxyalkylene glycol compound is a compound of formula (I) having a number average molecular weight of 2,000 or more and 30,000 or less and added at 0.01 to 35% by weight relative to the total amount of polyester. Method of Making a Transcription. (Wherein, R _l: C ₁ ~C ₁₃ alkyl group or _{H, R 2: C 2 ~C} | 16 alkyl group, n: an integer of 20-150) The method of claim 1, wherein the non-reactive lithium lithium sulfonate salt is a non-reactive lithium polyalkyl sulfonate of the general formula (II) is added to the polyester quantitative agent of 0.01 to 2% by weight based on the amount of polyester Manufacturing method. (Wherein, R _3: C ₃ ~C ₂₅ alkyl group or C ₇ ~C ₃₀ aryl group)