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Resin composition and molded body thereof

A technology of resin composition and compounding amount, which is applied in the field of resin composition containing polylactic acid, and can solve the problems of plasticizer leakage and low plasticizing effect

Pending Publication Date: 2021-04-23
KANEKA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, as plasticizers for polylactic acid, isobutyl adipate, dioctyl sebacate (Patent Document 1), acetyl tributyl citrate, triacetylene (Patent Documents 2 and 3), etc. have been reported. , but all have the disadvantages of low plasticizing effect or leakage of plasticizer

Method used

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  • Resin composition and molded body thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] Hereinafter, although an Example is shown and this invention is demonstrated in more detail, this invention is not limited to these Examples.

[0052] (raw material)

[0053] Copolyester raw material A: P(LA-co-3HB) manufactured according to the description of the literature: Journal of Biotechnology, 154 (2011), pp. 255-260 was obtained from Tokyo University of Agriculture and used. The mole fraction of lactic acid constituting the copolyester raw material A was 45 mol%, and the weight average molecular weight was about 110,000. The measurement of the mole fraction and weight average molecular weight of these lactic acids is based on the measurement method described in the said document. In addition, the monomer unit derived from lactic acid in this copolyester raw material A is a monomer unit derived from D-lactic acid.

[0054] Copolyester raw material B for comparison: A copolymer of 3-hydroxybutyric acid and 3-hydroxyhexanoic acid: P(3HB-co-3HH) produced accordin...

Embodiment 2

[0065] The weight ratio of the polylactic acid raw material A and the copolyester raw material A was changed to 60:40 (66.7 parts by weight of the copolyester relative to 100 parts by weight of polylactic acid), and obtained by the same method as in Example 1 except that Granules and tablets were measured for haze, total light transmittance and elongation at break. These results are shown in Table 1.

Embodiment 3

[0067] The weight ratio of polylactic acid raw material A and copolyester raw material A was changed to 40:60 (150 parts by weight of copolyester relative to 100 parts by weight of polylactic acid), and obtained by the same method as in Example 1 except that Granules and tablets were measured for haze, total light transmittance and elongation at break. These results are shown in Table 1.

[0068]

[0069] Except for using only the polylactic acid raw material A instead of the copolyester raw material A, pellets and sheets were obtained in the same manner as in Example 1, and the haze, total light transmittance, and elongation at break were measured. These results are shown in Table 1.

[0070] [Table 1]

[0071]

[0072] From Table 1, it is clear that the haze of polylactic acid does not substantially increase by compounding P(LA-co-3HB) to polylactic acid, but the elongation at break increases significantly. From this, it can be seen that the complexation with P(LA-co...

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Abstract

The invention relates to a resin composition containing: a polylactic acid; and a copolyester of a lactic acid and another hydroxycarboxylic acid. The other hydroxycarboxylic acid may be 3-hydroxybutanoic acid, 3-hydroxypentanoic acid, 3-hydroxyhexanoic acid, 3-hydroxyheptanoic acid, 3-hydroxyoctanoic acid, 3-hydroxynonanoic acid, 3-hydroxydecanoic acid, 3-hydroxydodecanoic acid, 3-hydroxytetradecanoic acid, 3-hydroxypentadecanoic acid, or 3-hydroxyhexadecanoic acid.

Description

technical field [0001] The present invention relates to a resin composition containing polylactic acid, and a molded body thereof. Background technique [0002] Polylactic acid is a biodegradable polyester resin that can be produced by polymerizing lactic acid obtained by microbial fermentation of renewable plant-derived raw materials such as starch. In recent years, the use of polylactic acid has attracted attention from the viewpoints of building a recycling society and suppressing climate change due to an increase in carbon dioxide emissions. [0003] However, since polylactic acid is a very hard resin, its usable applications are limited. Accordingly, various studies have been conducted on the softening technology of polylactic acid. As a technique for softening polylactic acid, a method of adding a plasticizer is known. So far, as plasticizers for polylactic acid, isobutyl adipate, dioctyl sebacate (Patent Document 1), acetyl tributyl citrate, triacetylene (Patent Do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L101/16
CPCC08L67/04C08J5/18C08J2367/04C08J2467/04C08L2201/06C08L2201/10C08L2205/025
Inventor 佐藤俊辅桥口朋晃田口精一
Owner KANEKA CORP
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