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Aliphatic polyester copolymer and process for producing same, biodegradable resin molding based on aliphatic polyester, and lactone-containing resin

A technology of aliphatic polyester and manufacturing method, applied in Group IV involving biodegradable aliphatic polymer, Group VI involving lactone-containing resin, 03] the second field of the present invention, to achieve the effect of excellent impact resistance

Inactive Publication Date: 2004-02-18
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, almost none of the biodegradable agricultural multilayer films currently on the market can fully satisfy these two properties. Therefore, in recent years, biodegradable agricultural multilayer films with controlled biodegradation speed and sufficient physical properties are being sought.

Method used

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  • Aliphatic polyester copolymer and process for producing same, biodegradable resin molding based on aliphatic polyester, and lactone-containing resin
  • Aliphatic polyester copolymer and process for producing same, biodegradable resin molding based on aliphatic polyester, and lactone-containing resin
  • Aliphatic polyester copolymer and process for producing same, biodegradable resin molding based on aliphatic polyester, and lactone-containing resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0963] Hereinafter, Groups I to VII of the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited thereto.

[0964] Various measured values ​​of the aliphatic polyester copolymers in Examples and Comparative Examples were obtained by the following methods.

[0965] (molecular weight and molecular weight distribution)

[0966] A standard curve was drawn from standard polystyrene by gel permeation chromatography (GPC), and the number average molecular weight (Mn), weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn) were obtained. Chloroform was used as the eluent.

[0967] (acid value and hydroxyl value)

[0968] Measured in accordance with JIS K0070.

[0969] (thermal properties)

[0970] The melting point and glass transition temperature were determined by a differential scanning calorimeter (DSC).

[0971] (Mechanical strength)

[0972] The tensile elongation and s...

Embodiment I-1

[0980] In the pre-polymerization tank equipped with stirrer, fractional condenser and temperature regulating device, 2.91 kg of 1,4-butanediol, 3.63 kg of succinic acid and 0.62 kg of ε-caprolactone were added together. Here, [B] / [A]=1.05 in the aforementioned formula (i), and [C] / ([A]+[C])=0.15 in the aforementioned formula (ii).

[0981]4.37 g of tetraisopropyl titanate and 0.89 g of magnesium hydrogen phosphate trihydrate were added thereto, stirred under normal pressure at a temperature of 145-225° C., and esterified. When the amount of distillate exceeds 0.8 kg, the prepolymerization process is terminated, and the reaction liquid is moved to the polymerization tank. The reaction solution was stirred at a temperature of 220-240° C., finally depressurized to 1.0 mmHg (133 Pa), and stirred for 3 hours to carry out the glycol removal reaction (transesterification reaction). The obtained low molecular weight polyester (D) had a weight average molecular weight of 56,000 and an...

Embodiment I-2

[0986] In the pre-polymerization tank equipped with stirrer, fractional distillation condenser and temperature regulating device, 36.25 kilograms of 1,4-butanediol, 43.18 kilograms of succinic acid and 10.32 kilograms of ε-caprolactone were added together. Here, [B] / [A]=1.09 in the aforementioned formula (i), and [C] / ([A]+[C])=0.20 in the aforementioned formula (ii). Then, 52.01 g of tetraisopropyl titanate and 10.46 g of magnesium hydrogen phosphate trihydrate were added thereto, and stirred under normal pressure at a temperature of 145-225° C. to carry out esterification reaction. When the amount of the distillate exceeds 10.0 kg, the prepolymerization process is terminated, and the reaction liquid is moved to the polymerization tank. The reaction liquid was stirred at a temperature of about 230° C., finally depressurized to 1.0 mmHg (133 Pa), and stirred for 4 hours to carry out the glycol removal reaction (transesterification reaction). The obtained low molecular weight p...

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Abstract

A high molecular weight aliphatic polyester copolymer, a high molecular weight aliphatic polyester copolymer containing polylactic acid; process for industrially producing these copolymers; composition of these copolymers; and various uses thereof. These copolymers have practical properties which make the copolymers moldable. They are free from the problem of plasticizer bleeding and can be degraded by microorganisms present in soils or water. They give moldings, such as sheets and films, which combine a sufficient strength with tear resistance. When the copolymers are ones having a branched structure, they give a molding having excellent mechanical properties. The moldings obtained from compositions containing either of these copolymers are excellent in elongation and biodegradability and have a satisfactory balanc therebetween. In particular, blending with one or more other biodegradable resins gives a molding having better moldability.

Description

technical field [0001] Group I of the present invention relates to a high molecular weight aliphatic polyester copolymer, a method for producing the same, and a film-like molded article obtained by molding the above-mentioned copolymer, and more specifically relates to a molded article in which the copolymer has physical properties capable of being molded and processed. A high-molecular-weight aliphatic polyester copolymer having practical physical properties that can be degraded by microorganisms in soil or water, and a film-shaped molded article formed from the copolymer can be supplied to an industrial production method. [0002] Group II of the present invention relates to polylactic acid-based high-molecular-weight aliphatic polyester copolymers with biodegradability and their production methods, more specifically, to practical physical properties that can be molded and processed, and can be processed by microorganisms in soil or water. Degraded polylactic acid-based high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G63/08C08G63/60C08G63/91C08L75/06
CPCC08G18/4277C08G2230/00C08L75/06C08G2310/00C08G63/60C08G63/91C08G63/08C08L2666/18C08G63/68
Inventor 片山弘冈野善道饭山尚志伊滕雅章寺西直史大前比登美角本智西村健二仲田幸司清水邦雄村上祯
Owner DAICEL CHEM IND LTD