Polylactic acid-based resin composition and molded article

A technology of resin composition and polylactic acid resin, which is applied in the field of polylactic acid resin composition and moldings, can solve the problems of insufficient hydrolysis resistance and durability, and achieve excellent hydrolysis resistance, good appearance, and long-term hydrolysis resistance excellent effect

Inactive Publication Date: 2012-05-23
UNITIKA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, it was evaluated at a very low level under the conditions of 38°C and 85% relative humidity for 10 days, and the long-term hydrolysis resistance and durability were insufficient.

Method used

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  • Polylactic acid-based resin composition and molded article
  • Polylactic acid-based resin composition and molded article
  • Polylactic acid-based resin composition and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] 100 mass parts of PLA1 as polylactic acid resin, 4 mass parts of CD1 as monocarbodiimide compound, and 0.5 mass parts of A as hydrotalcite compound are dry-blended, and then using a twin-screw extruder (Chibei Made by the company, brand name "PCM-30 type"), melt-kneading was carried out under conditions of a temperature of 190° C. and a screw rotation speed of 150 rpm. After melt-kneading, strands were extruded from a die with a diameter of 0.4 mm x 3 holes, cut into pellets, and dried at a temperature of 60° C. for 48 hours with a vacuum dryer (manufactured by Yamato Scientific Co., Ltd., trade name “Vacuum Dryer DP83”). Hours of drying treatment to obtain pellets (polylactic acid-based resin composition).

Embodiment 2～8

[0160] As shown in Table 1, except that B, C, D, E, F, G, and H were used instead of A as the hydrotalcite compound, the same operation as Example 1 was carried out to obtain particles of the polylactic acid-based resin composition.

Embodiment 9

[0162] Except having used CD2 as a monocarbodiimide compound, the operation similar to Example was performed, and the pellet of the polylactic acid-type resin composition was obtained.

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Abstract

Disclosed is a polylactic acid-based resin composition including a polylactic acid resin, a monocarbodiimide compound and a hydrotalcite compound, wherein the content of the monocarbodiimide compound is 0.1 to 10 parts by mass in relation to 100 parts by mass of the polylactic acid resin and the content of the hydrotalcite compound is 0.05 to 2 parts by mass in relation to 100 parts by mass of the polylactic acid resin.

Description

technical field [0001] The present invention relates to a polylactic acid-based resin composition and a molded body obtained from the polylactic acid-based resin composition. Background technique [0002] In recent years, various biodegradable aliphatic polyester resins represented by polylactic acid have attracted attention from the viewpoint of environmental protection. Even among aliphatic polyester resins, polylactic acid resin is one of the resins with good transparency and the highest heat resistance. In addition, since it can be mass-produced from plant-derived raw materials such as corn and sweet potatoes, it is inexpensive, and it can also contribute to the reduction of the use of petroleum raw materials, so it is highly useful. [0003] However, polylactic acid resins have disadvantages of low hydrolysis resistance and low durability during long-term use. This tendency is very obvious especially under high temperature and high humidity. The hydrolysis reaction o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J5/00C08K13/02C08L33/14C08L91/00C08K3/26C08K5/29C08L101/16
CPCC08K3/26C08K5/29C08L67/04C08L101/16C08L2666/02
Inventor 记虎佑次上田一惠西条健人椛岛洋平
Owner UNITIKA LTD
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