Resin composition and molded article

A technology of resin composition and skeleton, applied in the field of resin composition and molded products, can solve the problem of no proposal and the like

Inactive Publication Date: 2011-01-05
TEIJIN LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current situation where a method for stably forming polylactic acid in a stereocomplex phase has not been established, there is no proposal for a resin composition of PBT and polylactic acid sufficiently expressing a stereocomplex phase

Method used

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  • Resin composition and molded article
  • Resin composition and molded article
  • Resin composition and molded article

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0257] (Preparation of resin composition)

[0258] The resin composition of the present invention can be prepared by mixing aromatic polyester (component A), polylactic acid (component B), modifier (component C), and other components as necessary. Mixing Mixing may be performed by any method as long as it can be mixed uniformly by melt mixing, solution mixing, or the like. It is particularly preferable to knead in a molten state in a kneader, a single-screw kneader, a twin-screw kneader, a melting reactor, or the like.

[0259] The kneading temperature may be a temperature at which the two resins melt, but in consideration of the stability of the resins, kneading is preferably performed at 230 to 280°C, more preferably at 230 to 260°C. When kneading, it is more preferable to use a compatibilizing agent because it improves the uniformity of the resin and lowers the kneading temperature.

[0260] Examples of compatibilizing agents include inorganic fillers, polymer compounds o...

Embodiment

[0265] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples. The physical properties were measured by the following methods.

[0266] (1) Molecular weight

[0267] The weight-average molecular weight and number-average molecular weight of the polymer were measured by gel permeation chromatography (GPC) and converted to standard polystyrene.

[0268] The GPC measuring instrument is as follows.

[0269] Detector: Differential refractometer RID-6A manufactured by Shimadzu Corporation

[0270] Chromatographic column: Use Tosoh-(Co., Ltd.) TSKgelG3000HXL, TSKgelG4000HXL, TSKgelG5000HXL, TSKguardcokumnHXL-L chromatographic columns connected in series, or Tosoh-(Co., Ltd.) TSKgelG2000HXL, TSKgelG3000HXL, TSKguardcokumnHXL-L chromatographic columns connected in series.

[0271] Using chloroform as an eluent, at a temperature of 40° C. and a flow rate of 1.0 ml / min, 10 μl of a sample with a concentration of 1 m...

preparation example 1-1

[0307] Preparation Example 1-1 (Preparation of PLLA1)

[0308] With respect to 100 parts by weight of L-lactide (manufactured by Musashino Chemical Research Institute, optical purity 100%), 0.005 parts by weight of tin octylate was added, and in a reaction machine with a stirring blade under nitrogen atmosphere, the After reacting at 180° C. for 2 hours, adding 1.2 equivalents of phosphoric acid to tin octylate, the remaining lactide was removed at 13.3 Pa to form fragments to obtain poly-L-lactic acid (PLLA1). The obtained PLLA1 had a weight average molecular weight of 152,000, a glass transition temperature (Tg) of 63°C, a melting point (Tm) of 180°C, a carboxyl content of 14eq / ton, and a lactide content of 350wtppm.

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Abstract

Provided is a resin composition that produces molded articles with excellent shock resistance and stiffness. Also provided is a resin composition with 50% or more biomass content. Also provided is a resin composition with a low coefficient of moisture absorption, excellent hydrolysis resistance and high recyclability. Also provided is a resin composition that produces molded articles with excellent heat resistance. This invention is a resin composition that comprises an aromatic polyester (component A) that has a butylene terephthalate backbone as the main structural unit, and a polylactide (component B) made from poly-L-lactide and poly-D-lactide, as well as a modifier (component C). Said resin composition (i) exhibits a crystal fusion peak in the stereocomplex phase polylactide of 190 DEG C or greater with differential scanning calorimetry, (ii) has biomass content of 50% or more, (iii) has a notched Izod impact strength of 4-15 kJ / m2 and (iv) has a bending elastic modulus of 2.5-6 GPa.

Description

technical field [0001] The present invention relates to an aromatic polyester (component A), polylactic acid (component B), and modified agent (C component) resin composition. Background technique [0002] Engineering plastics such as polybutylene terephthalate (hereinafter sometimes abbreviated as PBT) are widely used in vehicle parts, electrical Materials for electronic instrument parts, precision instrument parts, etc. However, engineering plastics consume a large amount of petroleum resources and form waste after use, destroying the landscape and bringing adverse effects on the ecosystem. In addition, when incineration is carried out, the amount of carbon dioxide in the atmosphere increases, which is worrying about the impact on global warming. [0003] Against this background, expectations for biodegradable plastics made from non-petroleum resources have been further raised, and research has been conducted on the expression of biomass, which indicates the ratio of us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/32C08K5/29C08K5/3415C08L67/02C08L77/00C08L101/16
CPCC08L51/04C08K5/0083C08K3/34C08K5/29C08L51/085C08L77/12C08L77/06C08L67/02C08L67/04C08L2666/18C08L2666/02
Inventor 丰原清纲小田实生
Owner TEIJIN LTD
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