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Biodegradable resin composition having improved mechanical properties, moldability, and weather resistance, and preparation method therefor

A resin composition and biodegradability technology, applied in the field of mechanical properties obtained from moldability and weather resistance, can solve the problem of long reaction time, unfavorable production costs, and difficulty in obtaining high molecular weight aliphatic/aromatic copolyester resins and other problems, to achieve the effect of improving formability and durability, excellent productivity and economy, and shortening the reaction rate of polycondensation.

Pending Publication Date: 2022-01-28
TLC KOREA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the above-mentioned method, the esterification reaction and polycondensation reaction cannot be carried out smoothly due to the long chain of polyols, and it is difficult to obtain high-molecular weight aliphatic / aromatic copolyester resins, and the reaction time is long, which is not conducive to production costs. Disadvantages

Method used

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  • Biodegradable resin composition having improved mechanical properties, moldability, and weather resistance, and preparation method therefor
  • Biodegradable resin composition having improved mechanical properties, moldability, and weather resistance, and preparation method therefor
  • Biodegradable resin composition having improved mechanical properties, moldability, and weather resistance, and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0136] Preparation example: preparation of multifunctional compound

[0137] Replace the gas in a 1000ml round-bottomed flask with nitrogen, put in 268.16g of DL-malic acid, 148.96g of ethylene glycol and 0.02g of monobutyltin oxide as a catalyst, and perform esterification reaction at 120°C for two hours. When 2 moles of theoretically produced water as a by-product of the reaction flowed out, the reaction was confirmed to be complete, and the reaction was terminated to prepare a polyfunctional compound. The preparation process of the above-mentioned polyfunctional compound is represented as the following Reaction Formula 1.

[0138] Reaction 1

[0139]

[0140] (In the above reaction formula 1, m is an integer of 1 to 30.)

Embodiment 1

[0141] Embodiment 1: Preparation of biodegradable aliphatic polyester resin composition (1)

[0142] Replace the gas in the 100L reactor with nitrogen, put 29.23kg of adipic acid, 22.53kg of 1,4-butanediol and 300g of the polyfunctional compound obtained in the above preparation example into the reactor, raise the reaction temperature, and finally , after being fixed at 205° C., a theoretical amount of water was allowed to flow out. At this time, 10 g of dibutyltin oxide as a catalyst, 10 g of titanium isopropoxide, and 20 g of trimethyl phosphate as a stabilizer were added. Thereafter, the temperature of the reactor was raised, and polycondensation reaction was carried out at a temperature of 245° C. under a reduced pressure of 1.5 torr for 210 minutes to obtain an aliphatic polyester resin composition. Then, after mixing 100 kg of the resin composition obtained by the polycondensation reaction and 500 g of 1,6-hexamethylene diisocyanate with a high-speed mixer, a chain exte...

Embodiment 2

[0143] Embodiment 2: Preparation of biodegradable aliphatic polyester resin composition (2)

[0144] The gas in the 100L reactor was replaced with nitrogen, and 23.62kg of succinic acid, 22.53kg of 1,4-butanediol, and 300g of the polyfunctional compound obtained in the above preparation example were charged, and the reaction temperature was raised while stirring, and finally, After fixing to 205°C, water was allowed to flow out. At this time, 4 g of tetrabutyl titanate as a catalyst, 8 g of dibutyltin oxide, 8 g of titanium isopropoxide, and 15 g of trimethyl phosphate as a stabilizer were added. Thereafter, the temperature of the reactor was raised, and polycondensation reaction was carried out at a temperature of 245° C. under a reduced pressure of 1.5 torr for 181 minutes to obtain an aliphatic polyester resin composition. Then, after mixing 100 kg of the resin composition obtained by the polycondensation reaction and 500 g of 1,6-hexamethylene diisocyanate with a high-spe...

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Abstract

The present invention relates to a biodegradable resin composition having improved mechanical properties and moldability and a preparation method therefor and, more specifically, to a biodegradable resin composition and a preparation method therefor, wherein the biodegradable resin composition is obtained by mixing an acid component, containing an aliphatic dicarboxylic acid or a mixture component of an aliphatic dicarboxylic acid and an aromatic dicarboxylic acid, with an aliphatic diol in the presence of a multi-functional compound and sequentially carrying out an esterification reaction, a transesterification reaction, a polycondensation reaction, a chain extension reaction, and a solid-state polymerization reaction, and the biodegradable resin composition has excellent productivity and economic efficiency through an improved reaction rate, retains superb tensile strength, elongation rate, and processability, and is environmentally friendly through the biodegradation thereof in nature when buried.

Description

technical field [0001] The present invention relates to the sequential esterification reaction and transesterification reaction of an aliphatic dicarboxylic acid or an acid component comprising a mixture of aliphatic dicarboxylic acid and aromatic dicarboxylic acid and aliphatic diol in the presence of a polyfunctional compound A biodegradable resin composition with improved mechanical properties, moldability and weather resistance obtained from polycondensation reaction, chain extension reaction and solid phase polymerization reaction and a preparation method thereof. Background technique [0002] Social issues related to environmental pollution are becoming prominent around the world. For various plastics used in existing industrial fields, in most cases, they are used as non-degradable raw materials that are difficult to degrade naturally, and then disposed of by landfill and incineration. In this case, there are problems of insufficient landfill and environmental polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G63/66
CPCC08G18/4244C08G63/66C08G63/80C08G63/181C08G63/672C08G63/85C08G63/60C08G18/0895C08G18/4216C08G18/4238C08G18/73C08G2230/00C08G63/916C08L67/025C08G18/4252C08G63/16
Inventor 林宪铃赵伦刘明济
Owner TLC KOREA CO LTD
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