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A kind of preparation method of polyester amide and product thereof

A polyester amide and polyamide technology, which is applied in the field of polyester amide preparation, can solve problems such as complex recycling process operations, difficult degradation of PET waste, harsh reaction conditions, etc., and achieve short reaction time, energy saving, and reaction The effect of mild conditions

Active Publication Date: 2021-12-07
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art that PET waste is difficult to degrade in the natural environment, the recycling process is complicated, and the reaction conditions are harsh, a method for preparing polyester amide based on PET waste is provided

Method used

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  • A kind of preparation method of polyester amide and product thereof
  • A kind of preparation method of polyester amide and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (A) Add 2kg of PET waste (wherein the PET content is 99.5%), 6kg of ethylene glycol and 10g of catalyst zinc acetate into the reactor, replace nitrogen three times, heat up to 195°C, and react for 5h to obtain the reactant, the content of BHET in the reactant Be 95% (mass percentage);

[0052] (B) Mix the reactant in step (A) with 200g polyamide 66 salt and 1g stabilizer trimethyl phosphate, heat up to 250°C, distill off excess ethylene glycol, vacuumize to 20Pa, and react for 2h, Fill the kettle with 0.2MPa nitrogen, extrude and granulate.

[0053] The intrinsic viscosity of the obtained polyester amide is 0.69 dL / g, and the melting point is 238° C.; its mechanical strength is shown in Table 1.

Embodiment 2

[0055] (A) Add 2kg PET waste (wherein the PET content is 99%), 8kg ethylene glycol and 5g catalyst zinc acetate into the reactor, replace the nitrogen three times, heat up to 200°C, and react for 3h to obtain the reactant, the content of BHET in the reactant Is 94% (mass percentage);

[0056] (B) Mix the reactants in step (A) with 400g of polyamide 56 salt and 2g of stabilizer trimethyl phosphate, heat up to 270°C, distill off excess ethylene glycol, vacuumize to 30Pa, and react for 1.5 h, fill the kettle with 0.2MPa nitrogen, extrude and granulate.

[0057] The intrinsic viscosity of the obtained polyester amide is 0.65 dL / g, and the melting point is 235° C.; its mechanical strength is shown in Table 1.

Embodiment 3

[0059] (A) Add 2kg PET waste (wherein the PET content is 99%), 3kg ethylene glycol and 40g catalyst zinc acetate into the reactor, replace nitrogen three times, heat up to 170°C, react for 4h, and obtain the reactant, the content of BHET in the reactant Be 85% (mass percentage);

[0060] (B) Mix the reactant in step (A) with 60g polyamide 6T salt and 3g stabilizer trimethyl phosphate, mix evenly, heat up to 280°C, distill off excess ethylene glycol, vacuumize to 50Pa, and react for 3h , fill the kettle with 0.2MPa nitrogen, extrude and granulate.

[0061] The intrinsic viscosity of the obtained polyester amide is 0.72dL / g, and the melting point is 242°C; its mechanical strength is shown in Table 1.

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Abstract

The invention discloses a preparation method of polyester amide and a product thereof, comprising the following steps: A) reacting polyethylene terephthalate waste with ethylene glycol in the presence of a catalyst, and the temperature of the reaction is 170-220°C to obtain a reactant; B) mix the reactant described in step (A) with one or more of the mixture of diamine and diacid, polyamide salt and polyamide oligomer, Reaction under vacuum conditions, the vacuum degree of the vacuum is 10-200Pa, and the reaction temperature is 220-300°C. The preparation method of the present invention fills up the blank of polyester amide preparation based on PET waste that has not yet appeared in the prior art, has short reaction time, relatively mild reaction conditions, simple process operation, and can save a lot of energy consumption. Control and adjustment, the product performance can be compared with the existing routinely synthesized polyester amides.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of polyester amide and a product thereof. Background technique [0002] Polyethylene terephthalate (PET) has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C. It has excellent electrical insulation. Even at high temperature and high frequency, It can still maintain good electrical properties, and has good creep resistance, fatigue resistance, friction resistance, and dimensional stability. The application of PET has developed from the initial synthetic fiber to the current bottle, film, engineering plastic and other fields. China is the largest producer and consumer of PET in the world, and its production capacity has exceeded 20 million tons in 2008. [0003] PET is a non-degradable polymer, and the use of a large number of PET products will cause serious "white pollution". ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/44
Inventor 季薇芸秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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