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High-impact-resistance heat-resistant polylactic acid alloy material and preparation method thereof

A high-impact, alloy material technology, applied in the field of high-impact and heat-resistant polylactic acid alloy material and its preparation, can solve the problems of low thermal deformation temperature, poor impact resistance, etc., and achieves low cost, impact resistance and resistance. The effect of improved thermal properties and good impact resistance

Active Publication Date: 2012-06-20
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polylactic acid is brittle, has poor impact resistance and low heat distortion temperature. Therefore, the use of polylactic acid as a general-purpose plastic is subject to certain restrictions. It is necessary to modify the toughness and heat resistance of polylactic acid to apply it to higher requirements.

Method used

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  • High-impact-resistance heat-resistant polylactic acid alloy material and preparation method thereof
  • High-impact-resistance heat-resistant polylactic acid alloy material and preparation method thereof
  • High-impact-resistance heat-resistant polylactic acid alloy material and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a preparation method of the above-mentioned high-impact heat-resistant polylactic acid alloy material, the method includes the following steps: polylactic acid, heat-resistant polymer, impact modifier and hydrolysis inhibitor, melt reinforcing agent and anti-corrosion The oxygen agent is placed in the mixer according to the above-mentioned ratio and stirred to make it evenly mixed, and then the mixed components are put into the twin-screw extruder for reaction and extruded. A polylactic acid alloy material with high impact resistance and heat resistance.

[0031] Specifically, the above-mentioned vacuum drying condition is 0.5×10 -2 MPa-2.0×10 -2 Dry at 50-80°C for 3-8 hours under MPa.

[0032] The above polylactic acid, heat-resistant polymer, and impact modifier were vacuum-dried at 50-80°C for 3-8 hours before stirring to remove moisture, and the vacuum degree was 0.5×10 -2 MPa-2.0×10 -2 MPa.

[0033] The screw speed of the tw...

Embodiment 1

[0038] Weigh 39 parts of polylactic acid (molecular weight is 100000), 35 parts of polycarbonate, 10 parts of polymethyl methacrylate, 15 parts of ABS, 0.4 part of hydrolysis inhibitor DIC, 0.5 part of melt enhancer PO, 0.1 part of antioxidant Tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate)pentaerythritol ester. Among them, polylactic acid, polycarbonate, polymethyl methacrylate, and ABS need to be vacuum-dried at 50°C for 8 hours to remove moisture before use, and the vacuum degree is 2.0×10 -2 MPa.

[0039] Put each component in a mixer and stir for 3 minutes to make it evenly mixed, then react and extrude in a twin-screw extruder, the screw speed is 180rpm, and the temperature of each zone of the twin-screw extruder is: the first zone: 250 ℃, the second zone: 270℃, the third zone: 270℃, the fourth zone: 260℃, the fifth zone: 240℃, the sixth zone: 230℃, the seventh zone: 210℃, the eighth zone: 200℃ , Ninth Zone: 200°C, Tenth Zone: 200°C, Eleventh Zone: 200°C. Th...

Embodiment 2

[0042] Weigh 48 parts of polylactic acid (molecular weight is 200000), 40 parts of polyoxymethylene, 10 parts of acrylate polymer, 0.8 part of hydrolysis inhibitor DCC, 0.7 part of melt enhancer XDI, 0.5 part of antioxidant (3,5-di Octadecyl tert-butyl-4-hydroxyphenyl)propionate. Among them, polylactic acid, polyoxymethylene, and acrylate polymers need to be vacuum-dried at 70°C for 5 hours to remove moisture before use, and the vacuum degree is 0.9×10 -2 MPa.

[0043] Put each component in a mixer and stir for 3 minutes to make it evenly mixed, then react and extrude in a twin-screw extruder, the screw speed is 100rpm, the temperature of each zone of the twin-screw extruder is: the first zone: 160 ℃, the second zone: 160℃, the third zone: 165℃, the fourth zone: 165℃, the fifth zone: 165℃, the sixth zone: 165℃, the seventh zone: 165℃, the eighth zone: 170℃ , Ninth Zone: 170°C, Tenth Zone: 165°C, Eleventh Zone: 160°C. The extruded product is cooled and diced, in a vacuum of ...

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Abstract

The invention provides a high-impact-resistance heat-resistant polylactic acid alloy material and a preparation method thereof. The alloy material comprises the following components in percentage by weight: 39-70 percent of polylactic acid, 20-45 percent of heat-resistant macromolecules, 6-15 percent of an impact-resistant modifier, 0.4-1 percent of a hydrolysis inhibitor, 0.5-1 percent of melt reinforcing agent and 0.1-2 percent of an antioxidant. The high-impact-resistance heat-resistant polylactic acid alloy material is obtained by uniformly mixing the components with a stirrer, putting a mixture into a double screw extruder, and extruding and pelletizing. The method has the advantages of simple process, high benefit and low cost. The prepared alloy material can be applied in the fieldof engineering plastic for automobiles, buildings, aviation and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a polylactic acid alloy material, more specifically, to a polylactic acid alloy material with high impact resistance and heat resistance and a preparation method thereof. Background technique [0002] With the depletion of fossil resources such as petroleum and coal, renewable biomaterials have become the research focus of the materials industry. Polylactic acid (PLA) is a polymer obtained by polymerization of lactic acid as the main raw material. Its production process is non-polluting and biodegradable, so it is an ideal green polymer material. In recent years, due to its high transparency, high strength, good biocompatibility, biodegradability and other advantages, the application of polylactic acid in the fields of automotive interior, textile, packaging and medicine has been greatly developed. [0003] However, polylactic acid is brittle, has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L33/12C08L55/02C08L59/00C08L33/08C08L77/02C08L53/02C08L77/06C08L67/02C08L51/00C08K5/29C08K5/14C08K5/32B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 张正光陈效华唐少俊
Owner CHERY AUTOMOBILE CO LTD
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