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Biodegradable resin composition

A biodegradable, resin composition technology, applied in the field of biodegradable resin compositions, can solve the problem of underutilization of biodegradability, and achieve the effects of excellent biodegradability, excellent transparency, and avoiding the increase of garbage

Active Publication Date: 2013-09-25
TOYO SEIKAN GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, its biodegradability property is underutilized

Method used

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  • Biodegradable resin composition

Examples

Experimental program
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Effect test

preparation example Construction

[0070]

[0071] The biodegradable resin composition of the present invention containing the above-mentioned various components can be prepared as follows: the above-mentioned (A) and (B), and various additives such as an appropriate ester decomposition promoting agent (C) are mixed, and the It is prepared by melt-kneading at a temperature (for example, about 150° C. to 240° C.) at which each component does not decompose during discharge. In this case, the ester decomposition accelerator (B) (copolymerized polyester) may be directly mixed with the biodegradable resin (A), or a masterbatch of the ester decomposition accelerator (B) and other components may be prepared and mixed with Biodegradable resin (A) mixed.

[0072] The resin composition is used as a molded body of various shapes by a molding method known per se, such as extrusion molding, injection molding, compression molding, and the like.

[0073] In particular, the resin composition of the present invention is exce...

Embodiment

[0087] In the following examples and comparative examples, measurements of haze, TOC (measurement of eluted total organic carbon), and enzymatic decomposability were performed by the following methods.

[0088] Haze measurement:

[0089] The haze of each film was measured based on JIS K6714 using a color discriminator (color computer) [SM-4: Suga Test Instruments Co., Ltd.].

[0090] Determination of TOC (total organic carbon dissolved) (evaluation of hydrolyzability):

[0091] The sample polymer was frozen and pulverized using a freeze pulverizer (JFC-300 manufactured by Japan Analytical Industry Co., Ltd.). 100 mg of a powdered sample polymer and 10 ml of distilled water were put together into a 25 ml vial, and shaken at 45° C. and 100 rpm for hydrolysis. Take out 1ml of the supernatant of the sample liquid every certain time (every day) from the beginning of the test, pass through a 0.45 μm filter, dilute 10 times, and measure the amount of dissolved total organic carbon ...

Embodiment 2、3

[0126] Except having used the copolymerization polyester R2575, R5050 as an ester decomposition accelerator, it carried out similarly to Example 1, the biodegradable resin composition was prepared, and it molded into a film. R2575 is a random copolymerized polyester obtained by adding lactide / glycolide in a weight ratio of 25 / 75. It carried out similarly to Example 1, and measured the haze and the enzymatic decomposition amount. Table 2 shows the compounding amount of each component used in the preparation of the composition, and the measurement results of haze and enzymatic decomposition amount.

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Abstract

The present invention is a biodegradable resin composition which contains a hardly hydrolyzable biodegradable resin (A) and an ester degradation accelerator (B), and is characterized in that a copolyester, which contains a hardly hydrolyzable polyester segment (X) and a readily hydrolyzable polyester segment (Y) at a weight ratio such that 75 / 25 < X / Y < 10 / 90, is blended as the ester degradation accelerator (B). The biodegradable resin composition of the present invention has excellent biodegradability and excellent transparency.

Description

technical field [0001] The present invention relates to a biodegradable resin composition containing a refractory biodegradable resin such as polylactic acid as a main component. More specifically, it relates to a biodegradable resin composition having improved biodegradability and transparency. Background technique [0002] In recent years, biodegradable resins have attracted attention in various fields from the viewpoint of environmental issues and the like. In particular, biodegradable resins such as polylactic acid are hardly hydrolyzable and are stable even in contact with water, so various molded articles using such hardly hydrolyzable biodegradable resins have been put into practical use. For example, Patent Document 1 proposes a lactic acid-based resin composition containing polylactic acid as a main component and a molded product thereof. [0003] However, since molded articles made of biodegradable resins such as polylactic acid are difficult to hydrolyze, decomp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K3/10C08L67/00C08L101/16
CPCC08G63/08C08L101/16C08K3/26C08K2201/018C08L67/04C08K3/10C08L67/00
Inventor 吉川成志片山传喜小暮正人
Owner TOYO SEIKAN GRP HLDG LTD
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