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Biodegradable aromatic-aliphatic copolyester and preparation method thereof

An aliphatic copolyester and biodegradation technology, applied in the field of biodegradation of aromatic-aliphatic copolyester and its preparation, can solve the problem of weakening the advantages of aromatic-aliphatic copolyester and affecting the biodegradation of copolyester materials Performance, the content of aromatic dibasic acid should not be too high, etc., to achieve the effect of increasing irregularity, improving hydrophilicity and dyeing performance, and meeting the requirements of diversity

Active Publication Date: 2013-05-08
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of aromatic dibasic acid in these copolyesters should not be too high, otherwise it will greatly affect the biodegradability of copolyester materials
In order to ensure that the polymer has better biodegradability, reducing the content of aromatic dibasic acid will reduce the melting point of copolyester and deteriorate the thermodynamic properties, greatly weakening the advantages of aromatic-aliphatic copolyester

Method used

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  • Biodegradable aromatic-aliphatic copolyester and preparation method thereof
  • Biodegradable aromatic-aliphatic copolyester and preparation method thereof
  • Biodegradable aromatic-aliphatic copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Add 73g of adipic acid, 75g of terephthalic acid, 13g of isophthalic acid-5-sodium sulfonate, 220g of 1,4-butanediol, and 0.10g of tetra-n-butyl titanate into a tank equipped with a mechanical stirring device In a 500mL three-neck bottle. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the esterification reaction is carried out under nitrogen conditions. Heating to 225°C. After the reactants form a homogeneous system, control the reaction temperature so that the esterification reaction is stirred at 225°C for 3 hours. During this process, water is distilled from the reaction mixture as a by-product until the amount of the distillate reaches 92% of the theoretical calculation. (The theoretically calculated amount of water is twice the sum of the molar amounts of adipic acid, terephthalic acid and isophthalic acid-5-sodium sulfonate...

Embodiment 2

[0058] Add 70g dimethyl adipate, 107g dimethyl terephthalate, 15g dimethyl isophthalate-5-sodium sulfonate, 230g 1,4-butanediol, 0.15g zinc acetate to the container In a 500mL three-necked bottle with a mechanical stirring device. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the transesterification reaction is carried out under nitrogen conditions. Heat to 220°C. After the reactants form a homogeneous system, control the reaction temperature so that the transesterification reaction is stirred at 220°C for 3.5 hours. During this process, methanol is distilled from the reaction mixture as a by-product until the amount of distillate It reaches 92% of the theoretical calculation amount. (The theoretically calculated amount of methanol is twice the sum of the molar amounts of dimethyl adipate, dimethyl terephthalate and dimethyl isophthala...

Embodiment 3

[0062] 41g succinic acid, 51g adipic acid, 47g terephthalic acid, 5g isophthalic acid-5-sodium sulfonate, 93g ethylene glycol, 135g 1,4-butanediol, 0.15g zinc acetate, 0.05 g tetraisooctyl titanate was added to a 500mL three-necked flask equipped with a mechanical stirring device. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the esterification reaction is carried out under nitrogen conditions. Heating to 230°C. After the reactants form a homogeneous system, control the reaction temperature so that the esterification reaction is stirred at 230°C for 2 hours. During this process, water is distilled from the reaction mixture as a by-product until the amount of the distillate reaches 92% of the theoretical calculation. (The theoretically calculated amount of water is twice the sum of the molar amounts of succinic acid, adipic acid, tereph...

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Abstract

The invention belongs to the technical field of polymer material synthesis and preparation, and discloses biodegradable aromatic-aliphatic copolyester and a preparation method thereof. The biodegradable aromatic-aliphatic copolyester disclosed in the invention has the a constitutional repeating unit as shown in the specification, wherein R1 is selected from groups as shown in the specification; R3 is selected from Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba or Ra; R4 is selected from Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba or Ra; R2 is selected from groups as shown in the specification; n=1-1000; p=0-11; q=2-13. According to the invention, binary acid or ester containing a sulfonate group is added, which effectively improves the hydrophilic performance of the copolyester, makes polyester plastics be easier to be adsorbed, decomposed, and absorbed by microbe such as bacteria and the like, and provides plastics with better biodegradability.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis and preparation, and relates to a biodegradable aromatic-aliphatic copolyester and a preparation method thereof. Background technique [0002] In recent years, the continuous increase of plastic waste has caused serious social and environmental problems. So far, many long-term stable high-performance polymer materials are not easy to decompose in the natural environment. Therefore, how to deal with and decompose these large amounts of plastic waste has become an environmental problem faced by the whole world. These plastic wastes include many synthetic resins, such as polyolefin resins: polyethylene, polypropylene; polyester resins: polyethylene terephthalate, polybutylene terephthalate; polyamide resins: nylon; Resin: polyvinyl chloride, polystyrene; ABS resin: polyacetal resin and polycarbonate, etc. [0003] With the improvement of people's quality of life requirements and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/183C08G63/78
Inventor 赵冬云
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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