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Polylactic resin composition and its moulded goods

A technology of polylactic acid resin and composition, applied in the field of manufacturing polylactic acid molded products and molded products of polylactic acid resin composition, can solve problems such as turbidity and low transparency, and achieve improved heat resistance, good simplicity, and excellent resistance. Effects of heat and impact resistance

Inactive Publication Date: 2006-02-08
SUZUKI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The highly crystalline flakes have excellent strength, but are cloudy and have low clarity

Method used

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  • Polylactic resin composition and its moulded goods
  • Polylactic resin composition and its moulded goods
  • Polylactic resin composition and its moulded goods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070]The present invention is described in more detail below by way of examples. The following examples are not intended to limit the present invention.

[0071] In the following Examples and Comparative Examples, polylactic acid products were produced from various compositions at various mold temperatures, and the properties of these products were evaluated. In all the examples and comparative examples, the method for producing the test piece and the test method were the same.

[0072]

[0073] Metal phosphate (trade name: ADK STAB NA-11, NA-11SF, NA-11UF, NA-21, supplied by Asahi Denka Kogyo Co., Ltd.) and polylactic acid pellets (grade: LACTY 9030, supplied by Shimadzu Corporation supplied) or pellets mixed with polylactic acid and polybutylene succinate in a weight ratio of 4:1 (grade: Bionolle 1020, supplied by Showa Highpolymer Co., Ltd.) were mixed in the specified amount. In some comparative examples, a benzylidene sorbitol derivative (trade name: NC-4, supplied b...

Embodiment 1

[0092] 0.5 or 1.0% by weight of 2,2-methylene-bis(4,6-di-tert-butylphenyl)aluminum phosphate (trade name: ADK STAB NA-21) was mixed into 100 parts by weight of polylactic acid. , provided by Asahi Denka Co., Ltd.) or 2,2-methylene-bis(4,6-di-tert-butylphenyl) sodium phosphate (trade name: ADK STAB NA-11), through the aforementioned kneading and steps for making pellets. Using this pellet, a test piece was produced by the aforementioned method for producing a test piece at a mold temperature of 100°C, 110°C, or 120°C, and the load deflection temperature was measured. As shown in the results in Table 1, the load deflection temperature was significantly increased.

Embodiment 2

[0097] 0.1, 0.5, or 1.0% by weight of ADKSTAB NA-11 (supplied by Asahi Denka Co., Ltd.) or ADK STAB NA-21 was mixed into 100 parts by weight of polylactic acid, respectively, and pellets were produced by the aforementioned kneading step . Using this pellet, a test piece was produced by the aforementioned method for producing the test piece at a mold temperature of 35° C., and the load deflection temperature was measured. As shown in the results in Table 2, at a mold temperature of 35°C, no improvement in deflection temperature under load was observed in the test pieces containing the nucleating agent.

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Abstract

A polylactic acid composition comprising polylactic acid and at least one metal phosphate of the formula: wherein R1, R2, R3, and R4 each independently represents hydrogen or alkyl, which may be the same or different, M represents a metal atom, and m and n each independently represents an integer of 1 to 3 where the m is equal to or larger than n.

Description

technical field [0001] The present invention relates to molded articles of biodegradable plastic products, in particular molded articles of polylactic acid resin composition, and a method for producing molded articles of polylactic acid. More specifically, the present invention relates to a polylactic acid resin composition comprising polylactic acid as a main component, which can be highly crystallized in a short molding cycle as well as having an improved deflection temperature under load and excellent heat resistance. It relates to a method for manufacturing polylactic acid molded articles. Background technique [0002] Recently, from environmental considerations, it is desired to increase the recycling rate of automobile parts and to use materials with low environmental load. Under such circumstances, aliphatic polyesters such as polylactic acid, which are easily hydrolyzed in the presence of water, have drawn attention as environmentally friendly materials. Polylactic...

Claims

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Application Information

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IPC IPC(8): C08K5/52C08L67/04B29C39/00B29C39/36B29C39/02B29K67/00B29K105/16B29L31/30C08J5/04C08K3/04C08K3/32C08K3/34C08K3/36C08K5/15C08K5/20C08K5/521C08K5/527C08L101/16
CPCC08K5/527C08L67/04
Inventor 伊藤二三男
Owner SUZUKI MOTOR CO LTD
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