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PTT polyester chip and method for preparing antistatic PTT polyester fibres

A technology of polyester chips and polyester fibers, applied in the manufacture of conductive/antistatic filaments, single-component polyester rayon, etc., can solve the problem of poor antistatic effect of PTT fibers, difficult screw dispersion, and preparation process Complicated and other problems, to achieve the effect of stable dyeing uniformity, increased flexibility, and improved hygroscopic performance

Active Publication Date: 2011-04-20
JIANGSU ZHONGLU TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation process of the masterbatch is complicated. Since the melting point of the antistatic agent is only about 50°C, while the melting point of PTT polyester is 228°C, it is difficult to fully disperse during the extrusion process of the screw.
Therefore, the process operation is difficult, and the antistatic effect of the prepared PTT fiber is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method according to the PTT polyester chips of the present embodiment comprises the steps:

[0031] (1), Esterification: Purified terephthalic acid (PTA), 1.3-propylene glycol (PDO), 0.4%wt matting agent, under the action of a titanium series esterification catalyst, carry out an esterification reaction to obtain a polymer For monomers, the esterification reaction temperature is controlled at 230-255°C, and the esterification rate is required to reach 96.6% after the esterification reaction is completed;

[0032] (2) Polymerization reaction: After the esterification reaction is completed, add an antimony-based polymerization catalyst, 50 ppm antioxidant 1222 and 140 ppm stabilizer trimethyl phosphate to the above-mentioned polymerized monomers, and mix well. Turn on the vacuum system, first polymerize in low vacuum, slowly drop to 2KPa within 40 minutes, then enter high vacuum, keep vacuum ≤ 40Pa, carry out conventional polymerization at a temperature of...

Embodiment 2

[0034] The preparation method according to the PTT polyester chips of the present embodiment comprises the steps:

[0035] (1), with embodiment 1;

[0036](2) Polymerization reaction: After completing the esterification reaction, add antimony-based polymerization catalyst, 50ppm antioxidant 1222 and 140ppm stabilizer trimethyl phosphate to the above-mentioned polymerized monomers in sequence, after mixing evenly, turn on the vacuum system and keep the vacuum When the temperature is below 40Pa, the polymerization reaction temperature is controlled at 250-265°C. When the slice reaches the specified discharge viscosity for 18 minutes, turn off the vacuum system, and add 50ppm of silicone defoamer to the polymerization system in turn under the protection of nitrogen. , 3.5%wt fully melted antistatic agent 105 and antistatic agent 308 composition, then open the vacuum system, continue to polymerize until the slice reaches the specified viscosity to terminate the polymerization reac...

Embodiment 3

[0038] The preparation method according to the PTT polyester chips of the present embodiment comprises the steps:

[0039] (1), with embodiment 1;

[0040] (2) Polymerization reaction: After completing the esterification reaction, add antimony-based polymerization catalyst, 50ppm antioxidant 1222 and 140ppm stabilizer trimethyl phosphate to the above-mentioned polymerized monomers in sequence, after mixing evenly, turn on the vacuum system and keep the vacuum When the temperature is below 40Pa, the polymerization reaction temperature is controlled at 250-265°C. When the slice reaches the specified discharge viscosity for 22 minutes, turn off the vacuum system, and add 50ppm silicone defoamer to the polymerization system in turn under the protection of nitrogen. , 2.5%wt antistatic agent 105 that has been fully melted, and then open the vacuum system to continue polymerization until the slices reach the specified viscosity to terminate the polymerization reaction, and obtain PT...

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Abstract

The invention relate to a method for preparing PTT polyester chips and antistatic PTT polyester, wherein, the PTT polyester chips are synthesized with conventional polyester synthetic method, and difference lies in that an antifoaming agent and a melt antistatic agent are added in sequence at the later stage of the polymerization, thereby not only realizing an even dispersing of the antistatic agent, but also ensuring good molecular state of the polyester, overcoming the difficulties in technological process and obtaining PTT polyester chips with a good antistatic performance. The preparationmethod of the antistatic PTT polyester comprises the following steps: obtaining PTT polyester chips, pre-crystallization, drying and carrying procedures of spinning, winding, stretching and molding, wherein, the PTT polyester chips is obtained by the method. While obtaining good antistatic performance, the prepared polyester maintains good properties of PTT polyester; compared with material manufactured with traditional antistatic PTT polyester, the material manufactured with antistatic PTT polyester prepared by the method greatly improves dressing comfort and especially meets the requirements of materials for spring and summer garments.

Description

technical field [0001] The invention relates to a preparation method of polytrimethylene terephthalate, and also relates to a preparation method of polytrimethylene terephthalate fiber with antistatic function. Background technique [0002] Polytrimethylene terephthalate (PTT) is a promising new type of polyester material successfully developed by industry in the mid-1990s. It is a new organic polymer aromatic polyester product belonging to the same polymer series as PET and PBT. The successful development of PTT has further enriched the series of chemical fiber products. First of all, unlike PET polyester which is almost linear macromolecular conformation, the molecular conformation of PTT polymer is helical. The helical molecular conformation allows the PTT fiber to be highly "expanded", making the fiber have good elasticity; secondly, the glass transition temperature of PTT polyester is low, allowing its fiber and fabric to be dyed at a lower temperature, with excellent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/78C08G63/183C08L67/02D01F6/92D01F1/09
Inventor 边树昌
Owner JIANGSU ZHONGLU TECH DEV
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