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Polylactic acids compsns. make-up products and prepn. process thereof

A polylactic acid and resin-like technology, which is applied in the field of heat-resistant polylactic acid-like resin molded products, can solve the problems of inability to mold, inability to improve molding cycle, and inability to obtain crystallinity and transparency.

Inactive Publication Date: 2004-10-27
ADEKA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As catalyst deactivator, wherein enumerated alkyl hydrazine, aryl hydrazine, amide, cyclic amide, hydrazone, carboxylic acid hydrazide, bisacyl hydrazine derivative, heterocyclic compound etc., preferably bis[3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] hydrazide, although the depolymerization reaction is suppressed in the molten state like this, even if added bis[3-(3,5-di-tert-butyl-4-hydroxyl Phenyl) propionic acid] hydrazide, still can not obtain the resin composition that crystallinity and transparency are excellent, can be processed at the same time as general-purpose resin molding
That is, even deactivating the catalyst does not improve the molding cycle
[0014] Further, in JP-A-9-278991, JP-A-10-87975, and JP-A-11-5849, it is described that polylactic acid or aliphatic polyester is mixed with an aromatic or aliphatic carboxylic acid amide Compounds can produce molded products with good crystallinity, transparency and heat resistance, but in actual injection molding, they cannot be molded in the same molding cycle as general-purpose resins, and it is difficult to use them for practical purposes

Method used

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  • Polylactic acids compsns. make-up products and prepn. process thereof
  • Polylactic acids compsns. make-up products and prepn. process thereof
  • Polylactic acids compsns. make-up products and prepn. process thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0138] The production method of the present invention, that is, the heat-resistant polylactic acid-based resin molded article of the present invention obtained by molding the polylactic acid-based resin composition of the present invention, and a preferred production method thereof will be described below.

[0139] As a method of crystallizing the polylactic acid-based resin composition, after forming a molded article from the polylactic acid-based resin composition, annealing the molded article at a temperature at which the polylactic acid-based resin composition can be crystallized, etc. . However, these methods have the disadvantage that the molded article is easily deformed during the crystallization process of the annealing treatment. In order to eliminate this defect, when molding the polylactic acid-based resin composition of the present invention, the mold of the molding machine is set at a temperature at which the polylactic acid-based resin composition of the present...

Embodiment 1 and comparative example 1

[0146] Dry blend the mixing components shown in Table 1, melt and mix for an average of 4 minutes in a twin-screw kneading extruder at 200 ° C, extrude in a linear form from the die, cut off after water cooling, and obtain The particles of the polylactic acid resin composition.

[0147] The crystallization initiation temperature, crystallization peak temperature, glass transition temperature, and crystallization heat of the obtained particles were measured. These measurements were carried out by DSC (DiamondDSC manufactured by Perkin Elmer Co., Ltd.). 5 mg of a particle sample was raised from room temperature to 200° C. at a rate of 50° C. / min, held for 5 minutes, and then measured at a rate of cooling of 5° C. / min. The measurement results are shown in Table 1.

[0148] Then the particles obtained are vacuum-dried at 80° C. After making it completely dry, the temperature of the mold is kept at 110° C., and the cooling time is maintained at 120 seconds. By injection molding, r...

Embodiment 2

[0159] Dry blend the mixing components shown in Table 2, melt and mix for an average of 4 minutes in a twin-screw kneading extruder at 200 ° C, extrude in a linear form from the die, and cut after water cooling to obtain The particles of the polylactic acid resin composition.

[0160] The crystallization peak temperature and the heat of crystallization were measured for the obtained pellets. These measurements were carried out by DSC (Diamond DSC manufactured by Perkin Elmer Co., Ltd.). 5 mg of a particle sample was raised from room temperature to 200° C. at a rate of 50° C. / min, held for 5 minutes, and then measured at a rate of 5° C. / min. The measurement results are shown in Table 2.

[0161] Then vacuum-dry the obtained pellets at 80°C, after making them completely dry, keep the temperature of the mold at 110°C, and keep the cooling time at 120 seconds. By injection molding, the manufacturing process of JIS K 7110 (No. 1 A test piece) The releasability and deformability d...

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Abstract

A polylactic acid resin composition, which is formed by blending the following (A) and (B) per 100 parts by weight of polylactic acid: (A) 0 to 10 parts by weight of phenolic antioxidant, and ( B) 0.01 to 10 parts by weight of 1 selected from (b-1) chain amide, (b-2) cyclic amide, (b-3) chain hydrazide, and (b-4) cyclic hydrazide More than one amide compound or (b-5) a compound represented by general formula (P). where R a and R b Each independently represents a hydrogen atom, a hydroxyl group, an alkyl group with 1 to 8 carbon atoms, an alkoxy group with 1 to 8 carbon atoms, an aryl group with 6 to 18 carbon atoms, or a combination of these Ring structure (the number of carbon atoms in the ring structure is 10 to 18 based on the total number of carbon atoms in the fused ring); R represents a direct bond, an n-valent hydrocarbon group with 2 to 30 carbon atoms, a heterocyclic ring, or In the group shown in the second formula of the chemical formula, n represents an integer of 1-3.

Description

technical field [0001] The present invention relates to a polylactic acid resin composition capable of obtaining a molded article having excellent impact strength and heat resistance with good formability (moldability), and the heat resistance obtained from the polylactic acid resin composition A polylactic acid-based resin molded article (molded article), and a method for producing the polylactic acid-based resin molded article. Background technique [0002] In recent years, from the perspective of protecting the natural environment, based on people's demand for biodegradable polymers that can be decomposed in the natural environment and molded products molded from biodegradable polymers, biodegradability of aliphatic polyesters and other Polymer research became active. In particular, lactic acid polymers have a high melting point of 140 to 180°C, and because of their good transparency, they have been given a lot of attention as molded products used in packaging materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/13C08K5/20C08K5/25
CPCC08K5/13C08K5/25C08K5/20C08L67/04
Inventor 飞田悦男川本尚史漆原刚奥山久嗣金森健志
Owner ADEKA CORP