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Polyamide-modified polyester and preparation method thereof, and fibers prepared from polyamide-modified polyester

A technology for modifying polyester and polyamide. It is applied in the chemical characteristics of fibers, single-component synthetic polymer rayon, textiles and papermaking. It can solve the problems of poor hydrophilicity and high dye uptake of polyester, and achieve water absorption High performance, lower modification costs, and excellent dyeing properties

Inactive Publication Date: 2015-09-09
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a polyamide-modified polyester containing a bio-based structure, which effectively improves the shortcoming of polyester with poor hydrophilicity at low cost, and to make it with the polyamide-modified polyester Fiber-forming, cationic dyeable and high dye uptake

Method used

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  • Polyamide-modified polyester and preparation method thereof, and fibers prepared from polyamide-modified polyester

Examples

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Effect test

Embodiment 1

[0092] Example 1 Preparation of polyamide-modified polyester

[0093] Add 19.4kg of dimethyl terephthalate and 11.6kg of ethylene glycol into a 200L reactor, raise the temperature to 202°C, and carry out the reaction, and fractionate the low boiling point components. The reaction is carried out for 90 minutes, and the fraction reaches the theoretical amount. At 98%, the transesterification reaction was terminated. Raise the temperature of the system to 226°C, then add 10g of tetrabutyl titanate polycondensation catalyst, 0.12kg of nylon 66 with a relative viscosity of 2.0, evacuate to 40Pa, and gradually raise the temperature to 280°C, and carry out the reaction for 4 hours. When the polyester amide in the kettle After the intrinsic viscosity is 0.80dL / g, fill the polymerization kettle with 0.5MPa nitrogen gas, and then draw and granulate. The obtained polyamide-modified polyester had a melting point of 258° C. and a saturated water absorption of 0.32%.

Embodiment 2

[0094] Example 2 Preparation of polyamide-modified polyester

[0095] Add 19.4kg of dimethyl terephthalate, 12.4kg of ethylene glycol and 3.8g of tetrabutyl titanate into a 200L reaction kettle, raise the temperature to 198°C, and carry out the reaction, and fractionate the low boiling point components, and the reaction is carried out for 80 minutes , when the fraction reaches 98% of the theoretical amount, the transesterification reaction is terminated. Raise the temperature of the system to 260°C, then add 10g of tetrabutyl titanate polycondensation catalyst, 0.58kg of nylon 56 with a relative viscosity of 1.8, evacuate to 50Pa, and gradually raise the temperature to 275°C, and carry out the reaction for 4 hours. When the polyester amide in the kettle After the intrinsic viscosity is 0.86dL / g, fill the polymerization kettle with 0.5MPa nitrogen gas, and draw and granulate. The obtained polyamide-modified polyester had a melting point of 244° C. and a saturated water absorpt...

Embodiment 3

[0096] Example 3 Preparation of polyamide-modified polyester

[0097] Add 16.6kg of terephthalic acid, 11.1kg of ethylene glycol, 0.9kg of butanediol and 2.2g of tetrabutyl titanate into a 200L reactor, raise the temperature to 205°C to react, and fractionate the low boiling point components, react Carried out for 80 minutes, and when the fraction reached 99% of the theoretical amount, the esterification reaction was terminated. Raise the temperature of the system to 260°C, then add 8.2g of tetrabutyl titanate polycondensation catalyst, 1.16kg of nylon 56 with a relative viscosity of 2.2, evacuate to 60Pa, and gradually raise the temperature to 275°C, the reaction is carried out for 4 hours, when the polyester in the kettle After the intrinsic viscosity of the amide is 0.82dL / g, 0.5MPa nitrogen gas is charged into the polymerization kettle, and the amide is drawn and granulated. The obtained polyamide-modified polyester had a melting point of 235° C. and a saturated water abs...

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Abstract

The present invention relates to a polyamide-modified polyester and a preparation method thereof, and fibers prepared from the polyamide-modified polyester. The polyamide-modified polyester comprises structure units represented by the following structural formula I and II, wherein x is an integer of 2-18, y is an integer of 2-18, z is an integer of 2-18, and R1-R4 are respectively and independently selected from H or C1-C4 alkyl. According to the present invention, the polyamide-modified polyester has the high water absorption, wherein the saturated water absorption can be up to 5-6%; and the fibers prepared from the polyamide-modified polyester have the excellent dyeing property, the polyamide adding amount can be effectively reduced, and the modifying cost can be reduced, and the problems of the influence of the residual monomer on spinning and the like of nylon 6 and other amino acids or lactam type nylon are avoided. The formulas I and II are defined in the instruction.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular, the invention relates to a polyamide-modified polyester, a preparation method thereof and fibers prepared from the polyamide-modified polyester. Background technique [0002] Polyester fiber has been widely used due to its good performance. However, due to its lack of hydrophilic groups, it has poor affinity with rubber in industrial yarns and needs to be dipped multiple times. In civil yarns, dispersion must be used. Dyes are dyed at high temperature and high pressure. Due to the low solubility of disperse dyes and the addition of azo promoters, serious environmental pollution is caused. In recent years, my country's chemical fiber output has developed rapidly, among which the output of polyester ranks first in the world, and the production capacity is still developing at a high speed. At present, more and more polyester fibers are used for blending with natural protein fibers su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/44D01F6/82
Inventor 郑毅秦兵兵刘驰
Owner CATHAY R&D CENT CO LTD
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