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Biodegradable resin composition

A biodegradable, resin composition technology, applied in the field of biodegradable resin compositions, can solve the problems of decreased transparency, plasticizer exudation, insufficient crystallization speed, etc.

Active Publication Date: 2009-09-02
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystallization rate of the heat treatment after forming is insufficient, and if a large amount of crystal nucleating agent such as talc is added, the transparency of the sheet or film after thermoforming will decrease, and if the molded product is placed under high temperature and high humidity, there will be plasticizer oozing problem

Method used

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  • Biodegradable resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1～1-9

[0067] Examples 1-1 to 1-9, Comparative Examples 1-1 to 1-9

[0068] As a biodegradable resin composition, the products of the present invention (1A to 1I) shown in Table 1-1 and the comparative products (1a to 1i) shown in Table 1-2 were mixed with a kneader (DS3 manufactured by Moriyama Seisakusho Co., Ltd.). -20MWB-E) Melt and knead at 180°C for 10 minutes, then immediately stretch it to a thickness of about 5mm with an 8-inch roll (manufactured by Japan Roll Manufacturing Co., Ltd.) at 80°C, and cut it into length×width=8cm×8cm After the size was determined, it was pulverized with a pulverizer (S-20 manufactured by DAIKO Seiki Co., Ltd.) at a temperature below 40° C. to obtain a pulverized product of a biodegradable resin composition.

[0069] The obtained pulverized product was dried at 70° C. under reduced pressure for 1 day to reduce the water content to 500 ppm or less.

[0070] Table 1-1

[0071]

[0072] Table 1-2

[0073]

[0074] * 1: Polylactic acid resi...

Embodiment 1-10～1-11

[0098] Embodiment 1-10~1-11, comparative example 1-10~1-11

[0099] As the biodegradable resin composition, the products of the present invention (1A to 1B) shown in the above Table 1-1 and the comparative products (1a to 1b) shown in the above Table 1-2 were used in the same manner as in Example 1-1. A pulverized product of the biodegradable resin composition was obtained.

[0100] The obtained crushed product was injection-molded using an injection molding machine (J75E-D manufactured by Nippon Steel Works) at a mold temperature of 80° C. and a mold holding time shown in Tables 1-5. The mold releasability was evaluated with respect to the obtained test piece [a flat plate (70 mm x 40 mm x 3 mm) and a prismatic test piece (125 mm x 12 mm x 6 mm)] according to the following criteria. In addition, the thermal deformation temperature of the prismatic test piece (125 mm x 12 mm x 6 mm) was evaluated by the following method, and the crystallinity of the flat plate (70 mm x 40 mm ...

Embodiment 2-1～2-9、 comparative example 2-1～2-9

[0116] As the biodegradable resin composition, the products of the present invention (2A to 2I) shown in Table 2-1 and the comparative products (2a to 2i) shown in Table 2-2 were used to obtain biodegradable resin compositions in the same manner as in Example 1-1. A pulverized product of a degradable resin composition.

[0117] The obtained pulverized product was dried at 70° C. under reduced pressure for 1 day to reduce the water content to 500 ppm or less.

[0118] table 2-1

[0119]

[0120] Table 2-2

[0121]

[0122] * 1, * 2, * 4 to * 12 is the same as Table 1-1.

[0123] * 3: 12-Hydroxystearic acid triglyceride (manufactured by Kao Corporation, Kao-Waxus 85P)

[0124] Next, the mold holding time was evaluated for the pulverized product obtained above in the same manner as in Example 1-1. In addition, the bleeding resistance of the obtained flat plate (70 mm x 40 mm x 3 mm) was evaluated by the following method. The results are shown in Table 2-3 and Tabl...

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Abstract

The invention relates to a biodegradable resin composition containing a biodegradable resin, a plasticizer and a crystal nucleus agent, the plasticizer being a compound containing two or more ester groups in the molecule thereof, wherein at least one alcohol component constituting the ester contains an alkylene oxide having 2 to 3 carbon atoms, added in the average amount of 0.5 to 5 moles per one hydroxyl group, and the crystal nucleus agent is a mixture of the following crystal nucleus agent (1) and crystal nucleus agent (2); the crystal nucleus agent (1) being the following crystal nucleus agent (1-1) or crystal nucleus agent (1-2): crystal nucleus agent (1-1): at least one selected from compounds having a hydroxyl group and an amide group in the molecule thereof; and crystal nucleus agent (1-2) : at least one selected from hydroxy fatty acid esters; crystal nucleus agent (2): at least one selected from a metal salt of phenylphosphonic acid, a metal salt of a phosphate, a metal salt of an aromatic dialkyl sulfonate, a metal salt of rosinic acids, an aromatic carboxylic acid amide, rosinic acid amide, carbohydrazides, N-substituted ureas, salts of melamine compounds and uracils.

Description

technical field [0001] The present invention relates to a biodegradable resin composition. Background technique [0002] General-purpose petroleum-based resins such as polypropylene and polyvinyl chloride are used in various fields such as daily sundries, home appliances, automobile parts, construction materials, and food packaging due to their excellent processability and durability. However, when these resin products are used up and discarded, their good durability becomes a disadvantage, and their degradability in nature is poor, so there is a possibility that they may affect the ecosystem. [0003] In order to solve the above problems, polylactic acid and copolymers of lactic acid and other aliphatic hydroxycarboxylic acids, aliphatic polyhydric alcohols and aliphatic polycarboxylic acids have been developed as biodegradable resins among thermoplastic resins. Biodegradable resins such as polyester. [0004] Among these biodegradable resins, as far as polylactic acid re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/5317C08K5/10C08L101/16C08K5/20
Inventor 武中晃岸本洋昭
Owner KAO CORP
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