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Polyester chip modified by blend with side chain aliphatic diol and preparation method thereof

An aliphatic diol and blend technology, applied in the direction of single-component polyester rayon, etc., can solve the problems of unstable spinning, difficult to control polymerization reaction, and high production cost, and achieve low cost and polymerization. The effect of easy control of physical properties and low cost

Inactive Publication Date: 2011-07-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When CDP is dyed with cationic dyes, it needs to be dyed under high temperature and high pressure. If it is dyed with natural fibers such as cotton, wool, silk and linen, it will affect the performance of natural fibers; normal pressure cationic dyes are easy to dye polyester ECDP spinning is unstable and has poor spinnability. , the heat resistance of the fiber is poor; normal pressure cationic dyes are easy to dye polyester HCDP and fiber, the polymerization reaction is difficult to control, and the production cost is relatively high

Method used

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  • Polyester chip modified by blend with side chain aliphatic diol and preparation method thereof
  • Polyester chip modified by blend with side chain aliphatic diol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Using continuous polymerization equipment, the first esterification kettle is filled with 1 ton of PTA, 600 kg of EG, and at the same time 0.2 kg of the catalyst antimony trioxide and 0.2 kg of triphenyl phosphate are added to carry out the esterification reaction. The reaction temperature is 260°C. After 3h, the materials were transferred to the second esterification kettle, and at the same time, a blend of aliphatic diols with side chains equivalent to 10mol% of PTA was injected (the molar ratio of MPO to NPG in the blend was 90: 10) With SIPE equivalent to 1.5mol% of PTA, further esterification, reaction temperature 250℃, after 2h reaction, the materials are transferred to polycondensation kettle, reaction temperature 270℃, gradually reduce to vacuum degree less than 130Pa, polycondensation 3h After discharging, pelletizing, and drying, the modified copolyester chip SULET is obtained. The intrinsic viscosity of SULET chips is 0.650, and the melting point is 238°C.

Embodiment 2

[0036] Using continuous polymerization equipment, the first esterification kettle is filled with 1 ton of PTA and 410 kg of EG, while adding 0.32 kg of the catalyst antimony trioxide and 0.6 kg of triphenyl phosphate to carry out the esterification reaction. The reaction temperature is 260°C. After 3h, the materials were transferred to the second esterification kettle, and at the same time, a blend of aliphatic diols with side chains equivalent to 20mol% of PTA was injected (the molar ratio of MPO to NPG in the blend was 50: 50) With SIPM equivalent to 2mol% of PTA, further esterification, reaction temperature 252℃, after 2h reaction, the materials are transferred to polycondensation kettle, reaction temperature 286℃, gradually reduce to vacuum degree less than 130Pa, after polycondensation 3h , Discharging, pelletizing and drying to obtain modified copolyester chips SULET. The intrinsic viscosity of SULET chips is 0.570 and the melting point is 225°C.

Embodiment 3

[0038] Using continuous polymerization equipment, the first esterification kettle is filled with 1 ton of PTA, 450 kg of EG, and at the same time 0.1 kg of the catalyst antimony trioxide and 0.2 kg of triphenyl phosphate are added to carry out the esterification reaction. The reaction temperature is 260°C. After 3h, the materials were transferred to the second esterification kettle, and the aliphatic glycol blend with side chains equivalent to 15mol% of PTA was injected at the same time (the molar ratio of MPO to NPG in the blend was 10: 90) With SIPE equivalent to 3mol% of PTA, further esterification, reaction temperature 250℃, after 2h reaction, the material is transferred to polycondensation kettle, reaction temperature 270℃, gradually reduce to vacuum degree less than 130Pa, after polycondensation 3h , Discharging, pelletizing and drying to obtain modified copolyester chips SULET. The intrinsic viscosity of SULET chips is 0.62, and the melting point is 231°C.

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Abstract

The invention relates to a polyester chip modified by the blend with side chain aliphatic diol and a preparation method thereof. The polyester chip is copolymerized by the following monomers: (1) terephthalic acid; (2) ethylene glycol; (3) sodium or potassium 5-sulfoisophthalic acid dibasic ester; and (4) the blend of 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol. The preparation method comprises the following steps: adding terephthalic acid and ethylene glycol in a first esterification kettle, adding catalyst and stabilizer simultaneously to perform esterification reaction, transferring the material to a second esterification kettle, injecting the blend of 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol to perform esterification with sodium or potassium 5-sulfoisophthalic acid dibasic ester; and (2) transferring the material to a polycondensation kettle, discharging, pelletizing and drying. The modified polyester chip of the invention is used to prepare the cationic or disperse dye atmospheric deep dyeing copolyester fiber; and the method is simple, has low cost and is suitable for industrial production.

Description

Technical field [0001] The invention belongs to the field of modified copolyester chips and their preparation, and particularly relates to a copolyester chip modified by a blend of aliphatic diols with side chains and a preparation thereof. Background technique [0002] One of the main uses of polyester chips is to make polyester fibers. Since the advent of polyethylene terephthalate (PET) fiber in the 1950s, its fabric is stiff and non-iron, easy to wash, quick to dry, and durable. Excellent performance such as durability, high modulus, high strength, light resistance, wear resistance, heat resistance, corrosion resistance and low cost, plays an important role in apparel, decoration and industrial fields. However, the polyester molecular structure is regular, all the benzene rings are almost on the same plane, the molecular chains are closely arranged, and the polyester molecule lacks active groups that can bind to the dye, so it can only be dyed with disperse dyes at high tempe...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78D01F6/92
Inventor 顾利霞付昌飞李发学龚静华
Owner DONGHUA UNIV
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