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Production method of flame-retardant antibacterial PET (Polyethylene Terephthalate) copolyester

A production method and technology of copolyester, applied in the field of PET copolyester, can solve the problems of limiting the development of PET application fields, breeding bacteria in PET textiles, and lowering the melting point of PET polyester, so as to provide antibacterial properties, improve product color value, The effect of reducing polymerization time

Pending Publication Date: 2021-12-03
浙江凯普奇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous revision and supplementation of the applicable norms and standards for textiles, and people's demand for multifunctional and high-quality textiles, PET has some defects in performance: PET is a flammable material, which is flammable in case of fire, and it is easy to cause a fire or make a fire Spreading has become one of the main hidden dangers of various indoor and outdoor fires; PET textiles are prone to bacteria and mildew during long-term use. These defects directly limit the development of PET applications.
However, phosphorus-containing flame retardants are reactive flame retardants, but adding the reaction system of polyester will prolong the polymerization time of polyester, resulting in longer production cycle
At the same time, the addition of phosphorus-containing flame retardants will also lead to a decrease in the melting point of PET polyester, which will have an adverse effect on the subsequent spinning stage.

Method used

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  • Production method of flame-retardant antibacterial PET (Polyethylene Terephthalate) copolyester
  • Production method of flame-retardant antibacterial PET (Polyethylene Terephthalate) copolyester

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of phosphorus-containing flame retardant pre-esterification solution: Take phosphorus-containing flame retardant and ethylene glycol at a mass ratio of 1:1 and add them to the esterification kettle, add an appropriate amount of catalyst and antioxidant, and The temperature is 150° C., the pressure is 0.1 MPa, and the esterification reaction is carried out for 3 hours under the condition of stirring, and the phosphorus-containing flame retardant pre-esterification liquid is obtained. (2) Preparation of antibacterial agent dispersion: take zinc oxide and ethylene glycol at a mass ratio of 1:10, stir and mix, and then disperse by ultrasonic to obtain an antibacterial agent dispersion. (3) Esterification reaction: add terephthalic acid and ethylene glycol into the polyester esterification device at a molar ratio of 1:1.4, and carry out esterification reaction at an esterification temperature of 240°C and a pressure of 0.3MPa 150min, obtain the esterification...

Embodiment 2

[0026](1) Preparation of phosphorus-containing flame retardant pre-esterification solution: take phosphorus-containing flame retardant and ethylene glycol and add them to the esterification kettle at a mass ratio of 1:1, add an appropriate amount of catalyst and antioxidant, and The temperature is 150°C, the pressure is 0.1 MPa, and the esterification reaction is carried out for 3 hours under the condition of stirring, and the phosphorus-containing flame retardant pre-esterification liquid is obtained. (2) Preparation of antibacterial agent dispersion: take zinc oxide and ethylene glycol at a mass ratio of 1:20, stir and mix, and then disperse by ultrasonic to obtain an antibacterial agent dispersion. (3) Esterification reaction: add terephthalic acid and ethylene glycol into the polyester esterification device at a molar ratio of 1:1.4, and carry out esterification reaction at an esterification temperature of 240°C and a pressure of 0.3MPa 150min, obtain the esterification pr...

Embodiment 3

[0028] (1) Preparation of phosphorus-containing flame retardant pre-esterification liquid: take phosphorus-containing flame retardant and ethylene glycol and add them to the esterification kettle at a mass ratio of 1:2, add an appropriate amount of catalyst and antioxidant, and The temperature is 170°C, the pressure is 0.1 MPa, and the esterification reaction is carried out for 2.5 hours under the condition of stirring, and the phosphorus-containing flame retardant pre-esterification liquid is obtained. (2) Preparation of antibacterial agent dispersion: take zinc oxide and ethylene glycol at a mass ratio of 1:30, stir and mix, and then disperse by ultrasonic to obtain an antibacterial agent dispersion. (3) Esterification reaction: add terephthalic acid and ethylene glycol into the polyester esterification device at a molar ratio of 1:1.2, and carry out esterification reaction at an esterification temperature of 245°C and a pressure of 0.3MPa 180min, obtain the esterification p...

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Abstract

The invention relates to a production method of flame-retardant antibacterial PET copolyester. The production method comprises the following steps: (1) preparing a phosphorus-containing flame retardant pre-esterification liquid; (2) preparing an antibacterial agent dispersion liquid, stirring and mixing a nano inorganic metal oxide antibacterial agent and ethylene glycol, and performing ultrasonic dispersion to obtain the antibacterial agent dispersion liquid; (3) performing esterification reaction; and (4) performing condensation polymerization to obtain the flame-retardant antibacterial PET copolyester. Compared with the prior art, the PET copolyester has the advantages of good flame-retardant antibacterial performance, washing resistance, simple and convenient preparation process and low cost.

Description

technical field [0001] The invention relates to a PET copolyester and belongs to the technical field of polymer materials. Background technique [0002] Polyethylene terephthalate (PET) is the most important variety of thermoplastic polyester, commonly known as polyester resin. PET has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120°C. It has good creep resistance, fatigue resistance, friction resistance and dimensional stability. It is widely used in the textile field. Its usage occupies more than 50% of the textile fiber market. However, with the continuous revision and supplementation of applicable norms and standards for textiles, and people's demand for multifunctional and high-quality textiles, PET has some defects in performance: PET is a flammable material, which is flammable in case of fire, and it is easy to cause a fire or make a fire Spreading has become one of the main hidden dangers of vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08G63/692C08K3/22
CPCC08G63/6926C08G63/78C08K3/22C08K2003/2296C08K2003/2248C08K2201/011
Inventor 凌锋蒲新明郑兵陈玉星唐云峰沈志刚杨利平
Owner 浙江凯普奇新材料科技有限公司
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