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A kind of cyclic polyester modified polyamide ester and preparation method thereof

A technology of cyclic polyester and polyamide ester, which is applied in the field of chemical fiber, can solve the problems of uneven dispersion of PA6, poor product quality, yellow color, etc., achieve no reaction heat and release of by-products, simple process and equipment , the effect of short reaction time

Active Publication Date: 2021-10-29
浙江恒逸锦纶有限公司
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AI Technical Summary

Problems solved by technology

However, the dispersion of PA6 in the polyamide ester prepared in this way is not uniform, which is mainly because there are 6-10% of monomers and cyclic oligomers in PA6 to play the role of heterogeneous nucleation, so that the overall crystallinity The phase separation occurs due to the decline, and at the same time, during the spinning process, the crystal nucleus continues to grow until the size exceeds the fiber diameter, and stress concentration may occur and break, resulting in failure to form fibers
Sinopec Yizheng Chemical Fiber Co., Ltd. has been engaged in the synthesis of polyesteramide for many years. By melt-copolymerizing aliphatic polyamide chips and esterified products of low-molecular-weight polyester, they can well avoid the problem of phase separation, but the quality of the produced products is not good. well its yellowish in color

Method used

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  • A kind of cyclic polyester modified polyamide ester and preparation method thereof
  • A kind of cyclic polyester modified polyamide ester and preparation method thereof
  • A kind of cyclic polyester modified polyamide ester and preparation method thereof

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preparation example Construction

[0037] A kind of preparation method of cyclic polyester modified polyamide ester, comprises the following steps:

[0038] 1) Under the protection of inert gas, put aliphatic polyamide and cyclic polyester into a reaction vessel and heat to 230-250°C for 10-20 minutes to melt.

[0039] 2) Add the catalyst-containing tetraethylene glycol dimethyl ether slurry, and stir at 500-1000 rpm for 10-20 minutes. Wherein, the catalyst accounts for 100-200 ppm of the total weight of the cyclic polyester, and the amount of tetraethylene glycol dimethyl ether is 1-3 percent of the total weight of the cyclic polyester.

[0040] 3) Heating reaction, carry out melt copolymerization at 250-270° C. for 10-30 minutes to obtain a melt, discharge and cool.

Embodiment 1

[0042]Put 100 parts of nylon 6 with a relative viscosity of 2 and 50 parts of cyclic polyethylene terephthalate powder in a stainless steel reactor, control the reaction temperature at 235°C, the reaction pressure at 0.25MPa, and stir at 20HZ for 20 minutes; after the reaction The catalyst is made into a slurry with tetraethylene glycol dimethyl ether, put into a reaction kettle, the temperature is controlled at 250°C, and the melt copolymerization is carried out for 20 minutes, and the obtained melt is discharged, cooled, and pelletized. In this embodiment, tetraethylene glycol dimethyl ether is 2% of the total mass of the cyclic polyester, the catalyst is ethylene glycol antimony, and the amount of the catalyst is 100 ppm of the total mass of the cyclic polyester.

Embodiment 2

[0044] Put 100 parts of nylon 6 with a relative viscosity of 2 and 60 parts of cyclic polyethylene terephthalate powder in a stainless steel reactor, control the reaction temperature at 245°C, the reaction pressure at 0.25MPa, and stir at 20HZ for 30 minutes; after the reaction The catalyst was made into a slurry with tetraethylene glycol dimethyl ether, put into a reaction kettle, the temperature was controlled at 255°C, and the melt copolymerization was carried out for 30 minutes, and the obtained melt was discharged, cooled, and pelletized. In this embodiment, tetraethylene glycol dimethyl ether is 2% of the total mass of the cyclic polyester, the catalyst is ethylene glycol antimony, and the amount of the catalyst is 150 ppm of the total mass of the cyclic polyester.

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Abstract

The invention relates to the field of chemical fibers, and discloses a cyclic polyester-modified polyamide ester and a preparation method thereof. The present invention combines aliphatic polyamide and cyclic polyester under the action of tetraethylene glycol dimethyl ether and a catalyst, The melt copolymerization is carried out at lower temperature. The resulting polyesteramide has a good hue, no yellowing, good compatibility between the two components, and has both the stiffness of polyester and the high resilience of polyamide. The multifunctional clothing made of this fiber has super wear resistance Sex, soft feel, excellent elasticity and hygroscopicity, and not easy to deform.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a cyclic polyester-modified polyamide ester and a preparation method thereof. Background technique [0002] With the improvement of domestic people's living standards and the rapid development of fiber technology, there is an increasing demand for multi-functional and differentiated clothing. The era when the elder brother wears a piece of clothing, the younger brother wears it, the new clothes are worn for three years, and the sewing and mending is worn for another three years has passed. , multi-functional demand era. Polyester and polyamide fibers are the fibers with the largest output in the world today, and nearly 70 million tons of polyester fibers and 10 million tons of polyamide fibers are produced every year. As the second largest fiber in the world, polyamide nylon fiber has the advantages of high breaking strength, excellent wear resistance, good hygroscopicity, good r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/44
CPCC08G69/44
Inventor 李院院胡舒龙胥荣威郝莱丹产文涛裴永富
Owner 浙江恒逸锦纶有限公司
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