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Resin composition, method for producing the same and molded article

A resin composition, the technology of the composition, applied in the field of resin composition, can solve the problems such as no disclosure

Inactive Publication Date: 2009-07-29
TEIJIN LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although improvement in heat resistance is desired, it is difficult to necessarily stably form a stereocomplex (stereocomplex) phase The composition of the stereocomplex polylactic acid and PBT has not been disclosed
There is also no disclosure about the composition of polylactic acid and PBT fully expressing stereocomplex crystallization

Method used

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  • Resin composition, method for producing the same and molded article
  • Resin composition, method for producing the same and molded article
  • Resin composition, method for producing the same and molded article

Examples

Experimental program
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preparation example Construction

[0272] (Preparation method of resin composition)

[0273] The resin composition of the present invention can be prepared by mixing aromatic polyester (component A), polylactic acid (component B), and other components as necessary. It is preferable that the carboxyl group concentration of B component is 15 eq / ton or less. Furthermore, it is preferable that the lactide content of B component is 0-700 weight ppm.

[0274] The mixing of the A component and the B component can be performed by melt mixing, solution mixing, or the like. The mixing is preferably kneaded in a molten state in a kneader, a one-shaft kneader, a two-shaft kneader, a melting reactor, or the like.

[0275] The kneading temperature may be any temperature as long as the two components are melted, but considering the stability of the resin, etc., it is preferably kneaded in the range of 230 to 280°C, more preferably in the range of 230 to 260°C. When kneading, it is preferable to use a solubilizer (compatibi...

Embodiment

[0283] The present invention will be further specifically described below through examples, but the present invention is not limited thereto.

[0284] 1. Resin

[0285] As PBT, use ゥィンテ ッ コポリマ Co., Ltd. "ji ュ Lane ッ クス2002".

[0286] 2. The physical properties of polylactic acid were measured by the following methods.

[0287] (1) Melting point (Tm), glass transition point (Tg)

[0288] In the present invention, the melting point (Tm) and glass transition temperature (Tg) are measured using DSC (manufactured by TA Instruments Co., Ltd., TA-2920) to measure the melting peak and the inflection point of heat capacity when the temperature is raised at 20°C / min.

[0289] (2) Weight average molecular weight (Mw)

[0290] The weight-average molecular weight (Mw) was measured by packing a Shodex column GPC-804L in a GPC device Alliance manufactured by Waters, dissolving 50 mg of a sample in 5 ml of a mixed solvent of chloroform and HFIP, and developing with chloroform at 40°C. ...

manufacture example 1 and 2

[0364] Production examples 1 and 2 (preparation of poly-L-lactic acid: PLLA1, 2)

[0365] Add 0.005 parts by weight of tin octoate to 100 parts by weight of L-lactide (manufactured by Musashino Chemical Research Institute Co., Ltd., optical purity 100%), and in a nitrogen atmosphere, in a reactor with stirring blades, at 180 ° C React for 2 hours. Thereafter, the remaining lactide was removed at 13.3 kPa to fragment it to obtain poly-L-lactic acid. Table 1 shows the physical properties of the obtained poly-L-lactic acid.

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Abstract

Disclosed is a resin composition having high melting point and excellent heat resistance. Also disclosed is a resin composition which is excellent in melt stability and hydrolysis resistance. Specifically disclosed is a resin composition containing an aromatic polyester (component A) having a butylene terephthalate skeleton as a main structural unit, and a polylactic acid (component B) having a melting point of not less than 190 DEG C. Also disclosed are a molded article obtained from such a resin composition and a method for producing such a resin composition.

Description

technical field [0001] The present invention relates to a resin composition containing an aromatic polyester (component A) and polylactic acid (component B), and is excellent in heat resistance and hydrolysis resistance. The present invention also relates to molded articles formed from the resin composition. The present invention further relates to a preparation method of the resin composition. Background technique [0002] From the viewpoint of resource conservation and environmental protection, biodegradable polymers (bio-based polymers) have attracted attention. In particular, polylactic acid excellent in rigidity and L-lactic acid as its raw material can be produced in large quantities and at low cost by a fermentation method, and thus the expansion of its utilization is expected. [0003] However, polylactic acid still has problems in terms of practical properties compared with polymers made from petroleum resources. In particular, improvement of heat resistance or c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/34C08K5/315C08K5/51C08K5/527C08L67/02C08L101/16
CPCC08K5/527C08L67/04C08L67/025C08K3/0033C08K5/523C08L67/02C08K3/013C08L2666/18C08L67/03C08L101/16
Inventor 丰原清纲松田贵晓井野庆一郎松野勇一近藤史崇小田实生
Owner TEIJIN LTD
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