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Polylactic acid-based thermoplastic resin composition and molded article thereof

A thermoplastic resin and polylactic acid resin technology, which is applied in the field of polylactic acid-based thermoplastic resin compositions, can solve the problems of non-conformity and longer molding time, and achieve the effects of good heat resistance, reduced environmental load, and short molding cycle.

Active Publication Date: 2016-12-07
大科能宇菱通株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is a special molding method, and the molding time becomes longer, so it is not a general-purpose production method

Method used

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  • Polylactic acid-based thermoplastic resin composition and molded article thereof
  • Polylactic acid-based thermoplastic resin composition and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0118]

[0119] The rubber-containing graft copolymer was synthesized by emulsion polymerization according to the following recipe.

[0120] [formula]

[0121] Styrene (ST): 25 parts

[0122] Acrylonitrile (AN): 10 parts

[0123] Polybutadiene latex: 65 parts (based on solid content)

[0124] Potassium disproportionated abietate: 1 part

[0125] Potassium hydroxide: 0.03 parts

[0126] Tertiary dodecyl mercaptan (t-DM): 0.04 parts

[0127] Cumyl hydroperoxide: 0.3 parts

[0128] Ferrous sulfate: 0.007 parts

[0129] Sodium pyrophosphate: 0.1 parts

[0130] Crystalline glucose: 0.3 parts

[0131] Distilled water: 190 parts

[0132] Put distilled water, disproportionated potassium rosinate, potassium hydroxide and polybutadiene latex (gel content 80% by weight, average particle size 0.3μm) into the autoclave, after heating to 60°C, add ferrous sulfate and sodium pyrophosphate , Crystalline glucose. ST, AN, t-DM, and cumene hydroperoxide were continuously added over ...

Synthetic example 2

[0133]

[0134] In the raw material formulation of Synthesis Example 1, 50 parts (in terms of solid content) of polybutadiene (average particle diameter: 0.3 μm) with a gel content of 97% by weight were used as a rubbery polymer, and styrene as a monomer Except having reacted 37 parts of (ST) and 13 parts of acrylonitrile (AN), graft polymerization was performed similarly to the synthesis example 1, and the ABS graft copolymer (b-1-2) was obtained.

Synthetic example 3

[0135]

[0136] In the raw material formulation of Synthesis Example 1, 60 parts (calculated as solid content) of polybutyl acrylate (gel content 65% by weight, average particle diameter 0.34 μm) were used as a rubbery polymer, and methacrylic acid as a monomer Except having reacted 36 parts of methyl esters (MMA) and 4 parts of methyl acrylates (MA), graft polymerization was performed similarly to the synthesis example 1, and the graft copolymer (b-1-3) was obtained.

[0137] The measurement results of the rubber content, the weight composition ratio of the monomers, the graft ratio, and the weight-average molecular weight of the acetone-soluble component of the rubber-containing graft copolymers produced in Synthesis Examples 1, 2, and 3 are as follows.

[0138] Rubber-containing graft copolymer (b-1-1):

[0139] Rubber content = 66.2% by weight

[0140] AN / ST=28 / 72

[0141] Graft rate = 40% by weight

[0142] Weight average molecular weight (Mw) = 154000

[0143] Rubb...

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Abstract

A polylactic acid-containing thermoplastic resin composition which enables the production of a molded article that can be molded in a practically satisfactory molding cycle and has excellent mechanical properties including impact resistance, excellent heat resistance, excellent weld appearance and the like. The polylactic acid-containing thermoplastic resin composition comprises: 100 parts by weight of a polylactic acid-containing thermoplastic resin component which comprises 50 to 95 parts by weight of a polylactic acid resin (A) and 5 to 50 parts by weight of a rubber-reinforced resin (B); 0.1 to 3 parts by weight of a nucleating agent (C); 1 to 15 parts by weight of a filler (D); and 0.03 to 3 parts by weight of a dispersant (E). The rubber-reinforced resin (B) comprises 30 to 100% by weight of a rubber-containing graft copolymer (b-1) and 0 to 70% by weight of a hard (co)polymer (b-2).

Description

【Technical field】 [0001] The present invention relates to a polylactic acid-based thermoplastic resin composition capable of providing a molded article having a short molding cycle and excellent mechanical properties such as impact resistance, heat resistance, and appearance, and a molded article obtained by molding the polylactic acid-based thermoplastic resin composition . 【Background technique】 [0002] Rising concentrations of carbon dioxide in the atmosphere have been pointed to as the main cause of global warming and the need to limit carbon dioxide emissions on a global scale has been advocated. The effective use of plant resources that absorb and fix carbon dioxide is attracting attention as carbon neutrality. [0003] For plastics, the development of plastics using biomass has also shifted from conventional plastics based on petroleum. These plastics, which initially attracted attention as biodegradable resins, have recently begun to re-examine their significance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K7/00C08L51/04C08L55/02C08L101/16
CPCC08L67/04C08K3/013C08K5/10C08L51/04C08L55/02C08L101/16
Inventor 川口英一郎广本恭之
Owner 大科能宇菱通株式会社
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