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Modified poly- p-benzene dicarboxylic acid trimethylene glycol ester and method for producing the same

A technology of propylene glycol phthalate and terephthalic acid, which is applied in the field of modified poly(trimethylene terephthalate) and its production, and can solve the problem of large fluctuations in intrinsic viscosity between batches, low intrinsic viscosity of resin, and variable crystallization performance. To achieve better dyeing effect, improved spinning performance and excellent crystallization performance

Inactive Publication Date: 2008-02-27
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is reported that sulfonic acid group compounds such as SIPE are added. The addition of this organic acid component makes the melting point of the resin too low and the crystallization performance deteriorates. During the drying and pre-crystallization process of the slices, it is easy to cause adhesion, and the operation is very difficult; On the one hand, due to the addition of SIPE, the intrinsic viscosity of the resin is too low, and the intrinsic viscosity fluctuates greatly from batch to batch, resulting in a sharp increase in wool and broken filaments during spinning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Carry out transesterification reaction with 296 parts of dimethyl isophthalate-5-sodium sulfonate and 770 parts of 1,3-propanediol to obtain 40% propylene glycol solution of propylene glycol isophthalate-5-sodium sulfonate Stand-by; 146 parts of adipic acid and 545 parts of 1,3-propanediol were esterified to obtain a propylene glycol ester solution of propylene glycol adipate for use.

[0017] 2. Put 166 parts (weight) of terephthalic acid and 91 parts of 1,3-propanediol into the esterification kettle, then add 0.02% tetrabutyl titanate catalyst to carry out the esterification reaction; when the outflow of esterification water reaches the target After the value, it is transferred to the polycondensation kettle, adding the used stabilizer and antioxidant of conventional production polytrimethylene terephthalate (such as adopting 0.01% weight portion of phosphorus-containing compound as stabilizer, adopting IR1010 as antioxidant), Add 11.55 parts of the propylene glyco...

Embodiment 2

[0019] 1. Carry out transesterification reaction with 296 parts of dimethyl isophthalate-5-sodium sulfonate and 770 parts of 1,3-propanediol to obtain 40% propylene glycol solution of propylene glycol isophthalate-5-sodium sulfonate Stand-by; 146 parts of adipic acid and 475 parts of ethylene glycol were esterified to obtain a solution of ethylene glycol adipate for use.

[0020] 2. Put 166 parts (weight) of terephthalic acid and 91 parts of 1,3-propanediol into the esterification kettle, and then add 0.02% tetrabutyl titanate to carry out the esterification reaction; when the outflow of esterification water reaches the target value Afterwards, it is transferred to the polycondensation kettle, and the used stabilizer and antioxidant (such as adopting 0.01% by weight of phosphorus-containing compound as stabilizer and IR1010 as antioxidant) for conventional production of polytrimethylene terephthalate are added, and then Add 23.1 parts of the propylene glycol solution of the ab...

Embodiment 3

[0022] 1. Carry out transesterification reaction with 296 parts of dimethyl isophthalate-5-sodium sulfonate and 770 parts of 1,3-propanediol to obtain 40% propylene glycol solution of propylene glycol isophthalate-5-sodium sulfonate Stand-by; 146 parts of adipic acid and 625 parts of 1,4-butanediol were esterified to obtain a solution of butanediol adipate for use.

[0023] 2. Put 166 parts (weight) of terephthalic acid and 91 parts of 1,3-propanediol into the esterification kettle, and then add 0.02% tetrabutyl titanate to carry out the esterification reaction; when the outflow of esterification water reaches the target value Afterwards, it is transferred to the polycondensation kettle, and the used stabilizer and antioxidant (such as adopting 0.01% by weight of phosphorus-containing compound as stabilizer and IR1010 as antioxidant) for conventional production of polytrimethylene terephthalate are added, and then Add 34.7 parts of the above-mentioned propylene glycol solution...

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PUM

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Abstract

The invention discloses a preparing method of modified poly-p-phthalic acid methyl glycol ester, which comprises the following steps: proceeding esterification reaction with terephthalic acid and 1, 3-methyl glycol under existence of accelerant; preparing BHTT flux; proceeding ester exchanging reaction with m-phthalic acid di-methyl ester-5-mahogany and 1, 3-methyl glycol; getting methyl glycol solution of m-phthalic acid propylene glycol ester-5-mahogany; mixing adipic acid, ethylene alcohol, 1, 3-methyl glycol or 1, 4-butylene glycol; proceeding esterification reaction; getting adipic acid glycol ester solution; putting the m-phthalic acid methyl glycol ester-5-mahogany solution into BHTT flux; stirring; inputting the adipic acid glycol ester solution; proceeding polycondensation reaction; getting the product. This product can dye positive ion under normal temperature and normal pressure, which possesses great crystallization property and spinning property.

Description

Technical field: [0001] The invention relates to a polytrimethylene terephthalate and a production method. Background technique: [0002] Polytrimethylene terephthalate is PTT (hereinafter referred to as PTT). The strange carbon effect of the three methylene groups in the molecular structure of PTT makes the resilience and softness of PTT fibers better than that of acrylic fibers, and has natural antistatic properties. performance. The fabric made of PTT fiber is particularly soft and resilient, and has excellent skin-friendly performance. Therefore, PTT fiber is expected to be an epoch-making fiber. As the most suitable fiber for clothing, PTT fiber is also widely used in carpets, non-woven fabrics, etc. However, PTT fiber cannot be dyed with cationic dyes with good environmental protection effect and bright dyeing color, but can only be dyed with disperse dyes. The cost of dyeing with disperse dyes is high and the environmental protection effect is poor. Therefore, PT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/78
Inventor 成娟李旭本田圭介
Owner TORAY FIBER RES INST(CHINA) CO LTD
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