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Polylactic acid resin composition

A kind of technology of polylactic acid resin and composition, applied in the field of packaging materials

Inactive Publication Date: 2013-09-25
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, as a resin that can replace various plastics, the conventional polylactic acid resin needs to be further improved.

Method used

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  • Polylactic acid resin composition
  • Polylactic acid resin composition
  • Polylactic acid resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0200] Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not limited to a following example. In addition, room temperature means 15-30 degreeC.

[0201] [Average molecular weight of plasticizers and nonionic surfactants]

[0202] The saponification value was obtained according to the method described in JIS K0070, and the average molecular weight was obtained by calculation according to the following formula.

[0203] Average molecular weight = 56108 × (number of ester groups) / saponification value

preparation example 1

[0204] Preparation example 1 of plasticizer (dibasic ester of succinic acid and triethylene glycol monomethyl ether)

[0205] In a 3L flask equipped with a stirrer, a thermometer, and a dehydration tube, 500 g of succinic anhydride, 2,463 g of triethylene glycol monomethyl ether, and 9.5 g of p-toluenesulfonic acid monohydrate were added, and nitrogen gas (500 mL / min) was blown into the inner space. Under reduced pressure (4-10.7 kPa), it was made to react at 110 degreeC for 15 hours. The acid value of the reaction liquid was 1.6 (KOHmg / g). Add 27g of adsorbent Kyoward (キヨ一ワ一ド) 500SH (manufactured by Kyowa Chemical Industry Co., Ltd.) to the reaction solution, then stir at 80°C and 2.7kPa for 45 minutes and filter, then filter at a liquid temperature of 115 to 200°C and a pressure of 0.03kPa. Triethylene glycol monomethyl ether was distilled off, and after cooling to 80°C, the residual liquid was filtered under reduced pressure as the filtrate to obtain the dibasic ester of s...

preparation example 2

[0206] Preparation example 2 of plasticizer (oligoester of succinic acid and diethylene glycol)

[0207] Add 999g (9.41 moles) of diethylene glycol and 23.6g (0.122 moles of sodium methoxide) of 28% methanol solution containing sodium methoxide in a four-necked flask (with stirrer, thermometer, dropping funnel, distillation tube, nitrogen inlet pipe), After methanol was distilled off while stirring at normal pressure (101.3 kPa) and 120° C. for 0.5 hours, 4125 g (28.2 moles) of dimethyl succinate (manufactured by Wako Pure Chemical Industries, Ltd.) was added dropwise over 3 hours to allow reaction. Simultaneously, the methanol produced by the reaction was distilled off. Next, methanol was distilled off at a pressure of 50 to 760 mmHg and 75°C, and then 4.4 g of a methanol solution containing 28% sodium methoxide (0.023 mol of sodium methoxide) was added, and methanol was distilled off at a pressure of 22 to 760 mmHg and 100°C. After adding 41 g of Kyoward 600S (manufactured ...

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Abstract

A polylactic acid resin composition comprising: a polylactic acid resin; a plasticizer, preferably a plasticizer represented by formula (4) and / or formula (5); a nonionic surfactant such as a fatty acid polyoxyethylene glycol ester represented by formula (1) or a polyoxyethylene-polyoxypropylene copolymer; and a crystal nucleating agent represented by formula (2) and / or formula (3). This polylactic acid resin composition is appropriately usable for various industrial purposes, for example, convenience goods, food-packing materials, parts of home appliances, packing materials for home appliances, automobile parts and so on.

Description

technical field [0001] The present invention relates to a polylactic acid resin composition. More specifically, the present invention relates to a polylactic acid resin composition with improved secondary processability, especially thermoformability, a sheet obtained by using the composition, and a molded body obtained by secondary processing the sheet. The secondary processing method of the material and the packaging material containing the molded body. Background technique [0002] For food containers and packaging containers, various plastics such as polyolefins such as polyethylene, polypropylene, and polystyrene, and polyesters represented by polyethylene terephthalate (PET) are used. [0003] On the other hand, due to the improvement of environmental awareness, as a substitute for such resins, the development of environmentally friendly resins that have good biodegradability and are safe and excellent even for food containers is being developed. Among them, polylactic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04B29C51/10C08K5/06C08K5/10C08K5/20C08L71/02C08L101/16
CPCC08L67/04B29C51/002B29C51/10C08K5/10C08L71/02C08K5/20C08K5/06C08K5/103C08K5/11C08L67/00
Inventor 奥津宗尚桥本良一武中晃
Owner KAO CORP
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