Method for continuous production of biodegradable aliphatic/aromatic polyester copolymer

An aromatic polyester, aliphatic degradation technology, applied in the field of continuous manufacturing of biodegradable aliphatic/aromatic polyester copolymers, which can solve problems such as failures

Inactive Publication Date: 2015-08-26
LOTTE FINE CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, 1,4-butanediol is not only converted to tetrahydrofuran during the reaction, causing frequent breakdowns in the vacuum lines of manufacturing equipment, but also requires excessive use of 1,4-butanediol, so there is much room for improvement

Method used

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  • Method for continuous production of biodegradable aliphatic/aromatic polyester copolymer
  • Method for continuous production of biodegradable aliphatic/aromatic polyester copolymer
  • Method for continuous production of biodegradable aliphatic/aromatic polyester copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Embodiment 1: biodegradable PBAT (poly (butylene adipate-co-terephthalate), poly (hexyl Manufacture of diacid-co-butylene terephthalate))

[0146] [1st slurry tank]

[0147] 1,4-butanediol and adipic acid in a molar ratio of 1.3:0.52 were added to the first slurry tank, and mixed while stirring at 70°C to prepare a slurry.

[0148] [1 esterification reaction]

[0149] The primary esterification reaction of 1,4-butanediol and adipic acid was implemented while the slurry in the 1st slurry tank was continuously charged into the primary esterification reactor. At this time, the conditions are that the flow rate is about 35 kg / h, the reaction temperature is 180° C., and the pressure is normal pressure.

[0150] As the reactor for the above-mentioned primary esterification reaction, a vertical reactor (refer to http: / / www.hado) equipped with a stirrer with a pitched paddle impeller (Hado, Korea) of HADO Co., Ltd. was used. .co.kr / default1.html). Triphenyl phosphate and ...

Embodiment 2

[0179] Embodiment 2: the manufacture of biodegradable PBAT

[0180] [1 esterification reaction]

[0181] Add 1,4-butanediol and adipic acid in a molar ratio of 1.3:0.52 to a batch reactor, and perform an esterification reaction at 180° C. under normal pressure to obtain bishydroxybutylene adipate ( bishydroxy butylene adipate, hereinafter referred to as BHBA), and store it in the storage tank.

[0182] The water generated during the above-mentioned esterification reaction is removed by a condenser, and triphenyl phosphate and tetra-n-butyl titanate are continuously added to the batch reactor used for the above-mentioned esterification reaction of 1,4-butanediol and adipic acid ester. Triphenyl phosphate and tetra-n-butyl titanate were pre-mixed at a concentration of 10% by weight relative to 1,4-butanediol, and then continuously fed into a batch reactor. Triphenyl phosphate and tetra-n-titanate The content of butyl ester is 0.1 g and 0.3 g per 0.52 mole of adipic acid.

...

Embodiment 3

[0202] Embodiment 3: the manufacture of biodegradable PBAT

[0203] [1st slurry tank]

[0204] 1,4-butanediol, adipic acid, and terephthalic acid were added to the first slurry tank at a molar ratio of 1.3:0.52:0.48, and stirred and mixed at 60° C. to prepare a slurry.

[0205] [1 esterification reaction]

[0206] The esterification reaction was carried out while continuously charging the slurry prepared in the first slurry tank into the primary esterification reactor. The conditions at this time were flow rate 48 kg / h, reaction temperature 180° C., and pressure normal pressure.

[0207] Triphenyl phosphate and tetra-n-butyl titanate were added to the reaction mixture in the primary esterification reactor to perform esterification reaction.

[0208] The aforementioned triphenyl phosphate and tetra-n-butyl titanate were mixed in advance so as to have a concentration of 10% by weight relative to 1,4-butanediol, and then continuously charged. Adjust the flow rate so that th...

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Abstract

Provided is a method for a continuous production of biodegradable aliphatic / aromatic polyester, the method comprising the steps of: reacting an aliphatic dihydroxy compound and aliphatic dicarboxylic acid at 185℃ or lower in a primary ester reaction; continuously reacting the product obtained from the previous step in a secondary ester reaction; reacting the product obtain from the previous step in a continuous primary polycondensation reaction and obtaining a preliminary polymer having a weight-average molecular weight of 6,900-14,000; reacting the preliminary polymer in a continuous secondary polycondensation reaction and obtaining a product therefrom; and reacting the product obtained from the previous step in a continuous tertiary polycondensation reaction, and the biodegradable aliphatic / aromatic polyester polymer is produced by adding an aromatic dicarboxylic acid in the step for the first ester reaction or in the step for the continuous second ester reaction. The method for a continuous production of biodegradable aliphatic / aromatic polyester as described above allows obtaining a biodegradable aliphatic / aromatic polyester having superb processability, capability for film formation, tensile and tear strengths, and blending capability with other polymer resin, and additionally, reduces the quantity consumed of the aliphatic dihydroxy compound, which is a starting material, thereby reducing the per unit production costs.

Description

technical field [0001] Relating to a method for the continuous production of biodegradable aliphatic / aromatic polyester copolymers, in particular, to the continuous production of biodegradable aliphatic / aromatic polyester copolymers using aliphatic dicarboxylic acids and aromatic dicarboxylic acids and aliphatic dihydroxy compounds Process for aromatic polyester copolymers. Background technique [0002] As non-degradable plastics such as nylon, polyethylene terephthalate, polypropylene, polyethylene, etc. have been considered as the main cause of environmental pollution in the past, biodegradable polyesters have attracted attention from the perspective of environmental protection, etc. s material. Such biodegradable polyesters can be produced by a batch production method or a continuous production method. [0003] In the batch production method, in order to achieve the intrinsic viscosity and molecular weight of the target polyester, not only a long residence time is requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08G63/16C08L67/02
CPCC08G63/78C08G63/16C08L67/02C08G63/916
Inventor 姜景敦尹基哲金相烨卞吉锡廉正金釜成金世勋朴成培
Owner LOTTE FINE CHEM CO LTD
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