Aliphatic/aromatic copolyester and preparation method thereof

An aromatic and copolyester technology, applied in the field of aliphatic/aromatic copolyester and its preparation, can solve problems such as incompatibility, achieve excellent mechanical properties, overcome poor mechanical properties, and improve mechanical properties.

Inactive Publication Date: 2012-06-06
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, most of these patents use the method of simultaneous melt polycondensation of aromatic polyester units and aliphatic polyester units, which is obviously not suitable for some monomers with higher polarity, such as oxalic acid and its derivatives

Method used

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  • Aliphatic/aromatic copolyester and preparation method thereof
  • Aliphatic/aromatic copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 1.46kg of dimethyl terephthalate (DMT), 1.35kg of 1,4-butanediol, and 1.5g of tetra-n-butyl titanate into a 10L reaction kettle. After all the materials are added, fill with nitrogen and deflate to remove the oxygen in the reaction kettle. To ensure that the transesterification reaction is carried out under nitrogen conditions. The transesterification reaction was stirred at 230° C. for 3 h. During this process, methanol was distilled out from the reaction mixture as a by-product until the amount of the distillate reached 92% of the theoretically calculated amount. (The theoretically calculated amount of methanol is twice the molar amount of DMT)

[0046] Add 0.87kg of cyclic ethylene glycol oxalate and 3g of dibutyltin oxide, control the reaction temperature to 250°C, keep the temperature for 2h, then vacuumize (<500Pa) and stir for 2.5h to stop the reaction.

[0047] Inflate nitrogen to pressurize, extrude the reaction mixture from the reaction kettle, cool and ...

Embodiment 2

[0050] Add 0.83kg of terephthalic acid (PTA), 1.20kg of ethylene glycol, and 2.0g of antimony trioxide into a 10L reaction kettle. After all the materials are added, fill with nitrogen and deflate to remove the oxygen in the reaction kettle. To ensure that the esterification reaction is carried out under nitrogen conditions. The esterification reaction was stirred at 200° C. for 4 h. During this process, water was distilled out from the reaction mixture as a by-product until the amount of the distillate reached 92% of the theoretically calculated amount. (The theoretically calculated amount of water is twice the molar amount of PTA)

[0051] Add 2.0 kg of cyclic butanediol adipate and 4 g of stannous octoate, control the reaction temperature to 260° C., keep the temperature for 1.5 hours, vacuumize (<500 Pa) and stir for 2 hours to stop the reaction.

[0052] Inflate nitrogen to pressurize, extrude the reaction mixture from the reaction kettle, cool and shape in water, and o...

Embodiment 3

[0055] 1.89 kg of dimethyl terephthalate (DMT), 0.44 kg of dimethyl isophthalate, 2.2 kg of 1,3-propanediol, and 2.3 g of zinc acetate were added to a 10 L reactor. After all the materials are added, fill with nitrogen and deflate to remove the oxygen in the reaction kettle. To ensure that the transesterification reaction is carried out under nitrogen conditions. The transesterification reaction was stirred at 220° C. for 3.5 h. During this process, methanol was distilled out from the reaction mixture as a by-product until the amount of the distillate reached 92% of the theoretically calculated amount. (The theoretically calculated amount of methanol is twice the molar amount of dimethyl phthalate)

[0056] Add 0.52kg of cyclic butanediol succinate, 2g of dibutyltin oxide, and 1g of aluminum triisopropoxide, control the reaction temperature at 260°C, keep the temperature for 1.5h, then vacuumize (<500Pa) and stir for 3h to stop the reaction.

[0057] Inflate nitrogen to pres...

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Abstract

The invention which belongs to the material preparation field discloses an aliphatic/aromatic copolyester and a preparation method thereof. According to the aliphatic/aromatic copolyester, the molecular weight is greater than 20000, the ultimate strength is greater than 10MPa and lower than 60MPa, the breaking elongation rate is greater than 5% and lower than 3000%, Tg is greater than -70DEG C and lower than 40DEG C, Tm is greater than 50DEG C and lower than 270DEG C, and the biodegradation rate is greater than 30%. According to the preparation method of the aliphatic/aromatic copolyester, fusion polycondensation and ring opening polymerization are simultaneously carried out on an aromatic polyester monomer and an annular aliphatic polyester monomer in the presence of a catalyst to obtain the aliphatic/aromatic copolyester with irregularly distributed aromatic units and aliphatic units. The aliphatic/aromatic copolyester has the advantages of excellent mechanical performance, high molecular weight, realization of the complete biodegradation, and the like.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to an aliphatic / aromatic copolyester and a preparation method thereof. Background technique [0002] In people's daily production and life, a lot of waste will be generated, and the main way to deal with these wastes is landfill. These municipal solid wastes sent to landfills without proper treatment and the increasing amount of non-degradable plastics in the waste stream (a large proportion of which are plastics) have drastically reduced the number of available landfills and increased waste disposal costs, although some Waste can be reused, but the effect is not ideal, and the cost of recycling is too high, and most of them are directly landfilled and degraded naturally, thus causing serious environmental problems. [0003] With the increasingly serious problem of environmental pollution, the development of biodegradable polymer materials has become a demand for eco...

Claims

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Application Information

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