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Polycarbonate resin composition comprising plant-derived component

A technology of resin composition and polycarbonate, applied in the field of resin composition, can solve problems such as difficulty

Active Publication Date: 2009-08-19
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polycarbonates used therein are all aromatic polycarbonates containing petroleum-derived components, so even though polylactic acid is used, it is difficult to say that the purpose has been sufficiently achieved from the viewpoint of reducing the environmental load of plastics.

Method used

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  • Polycarbonate resin composition comprising plant-derived component
  • Polycarbonate resin composition comprising plant-derived component
  • Polycarbonate resin composition comprising plant-derived component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] Hereafter, although an Example demonstrates this invention concretely, this invention is not limited to these examples.

[0061] (Component A) polycarbonate component (hereinafter, sometimes abbreviated as "Bio-PC") and (Component B) polylactic acid component were produced by the method shown in the following production example. On the other hand, each value in the examples was determined by the following method.

[0062] (1) Reduction viscosity: The viscosity at 35° C. of a solution obtained by dissolving 120 mg of polycarbonate in 10 ml of a mixed solvent of phenol / tetrachloroethane (50 / 50 by volume) was measured with an Ubbelohde viscometer. The unit is dl (1 / 10 liter) / g.

[0063] (2) Weight average molecular weight: The weight average molecular weight of polylactic acid was calculated|required as the value converted into polystyrene by the gel permeation chromatography (GPC).

[0064] (3) The glass transition temperature and the ratio of the melting peak above 195...

manufacture example 1

[0076] Production example 1: (Component A) Production of polycarbonate component (Bio-PC)

[0077] Isosorbide (20.0kg, 137 moles), 1,3-propanediol (4.69kg, 61.6 moles) and diphenyl carbonate (41.9kg, 196 moles) were charged into the polymerization tank, and 2 , 2-bis(4-hydroxyphenyl)propane disodium salt (13.3mg, 4.89×10 -5 mol) and tetramethylammonium hydroxide (7130mg, 1.96×10 -2 mol), melted at 180°C under a nitrogen atmosphere. The pressure was reduced and the temperature was raised while stirring, and the inside of the reaction tank was adjusted to 66.67 Pa (0.5 mmHg) and 245° C. while distilling off generated phenol. The obtained polycarbonate is abbreviated as "Bio-PC".

[0078] The reduced viscosity of Bio-PC is 0.59-0.63, and the glass transition point measured by DSC is 121-122°C.

manufacture example 2

[0079] Production Example 2: Production of (B-1 component) poly-L-lactic acid component

[0080] Add 48.75 parts by weight of L-lactide (manufactured by Musashino Chemical Research Institute Co., Ltd.) and 1.25 parts by weight of D-lactide (manufactured by Musashino Chemical Research Institute Co., Ltd.) into the polymerization tank, and replace the system with nitrogen. , add 0.05 parts by weight of stearyl alcohol, tin octoate 25×10 as catalyst -3 parts by weight, polymerized at 190° C. for 2 hours to produce a polymer. This polymer was washed with a 7% 5N hydrochloric acid solution in acetone to remove the catalyst to obtain a poly-L-lactic acid component (PLLA, component B-1). The weight average molecular weight of the obtained PLLA (component B-1) was 118,200. The melting point (Tm) was 159°C. The crystallization point (Tc) was 120°C.

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Abstract

A resin composition comprising 100 parts by weight of a polycarbonate of which a specific ether diol residue constitutes 40-100 mol% and 1-40 parts by weight of polylactic acid, wherein the polylactic acid is composed of a poly-L-lactic acid component and a poly-D-lactic acid component, and wherein in the melting peak derived from the polylactic acid component during temperature increase for measurement with a differential scanning calorimeter (DSC), the proportion of the melting peak area for 195 DEG C and above is at least 60% of the sum of the melting peak area for 195 DEG C and above (high temperature) and the melting peak area for 140-180 DEG C (low temperature), as determined by measurement of the melting peak derived from the polylactic acid component during temperature increase with a differential scanning calorimeter (DSC).

Description

technical field [0001] The present invention relates to a resin composition having a plant-derived component having improved heat resistance. More specifically, it relates to a resin composition having an improved deflection temperature under load, which comprises a resin composition comprising polycarbonate containing plant-derived components and polylactic acid composed of poly-L-lactic acid components. Composed of poly D-lactic acid components. Background technique [0002] Polycarbonate resins are excellent in transparency, heat resistance, and impact resistance, and are currently widely used in the electrical and electronic fields, automotive fields, optical parts fields, and other industrial fields. However, generally used aromatic polycarbonate resins are manufactured using raw materials obtained from petroleum resources. Therefore, in recent years, there are concerns about the depletion of petroleum resources and global warming caused by carbon dioxide generated fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08G64/02C08G64/34C08L67/04
CPCC08L69/00C08L67/04C08G64/0208C08L2666/18
Inventor 小田显通三好孝则
Owner TEIJIN LTD