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Plastic composition, plastic and preparation method of the plastic

A technology of plastic composition and polymer, applied in the field of plastic composition, can solve the problems of poor mechanical properties, no fragrance, etc.

Active Publication Date: 2013-01-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of poor mechanical properties and no fragrance of polycarbonate and polylactic acid blend materials in the prior art, the invention provides a plastic composition, the plastic prepared by the composition has fragrance, and its mechanical properties excellent

Method used

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  • Plastic composition, plastic and preparation method of the plastic

Examples

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preparation example Construction

[0032] During the preparation process of the above-mentioned plastics, the presence of moisture will have a great influence on the properties of the prepared plastics. Therefore, preferably, when preparing the above-mentioned plastic, firstly, each component in the plastic composition is dried at 0.04-0.08 MPa, 30-120° C. for 4-8 hours to remove moisture in the plastic composition. The plastic composition is then melt-extruded in an extruder. The method of said melt extrusion is well known to those skilled in the art, for example, it can be 180-250r / min when the aspect ratio is 20-40, the screw speed is 180-250r / min, and the temperature of each section is respectively 140-160 ℃, 220-230℃, 230-240℃, 230-245℃, 230-245℃, 240-245℃, 240-245℃, 240-250℃, 240-250℃, 245-255℃, each section The melt extrusion is carried out under the condition that the vacuum degree is 0.02-0.06MPa.

[0033]In the above method, the degree of vacuum is the absolute pressure. The extrusion can be carrie...

Embodiment 1

[0037] This example is used to illustrate the plastic composition, plastic and its preparation method provided by the present invention.

[0038] 1. Raw material pretreatment

[0039] Polylactic acid (polylactic acid produced by Natureworks, USA, injection molding grade, viscosity-average molecular weight: 200,000, melting point: 165°C), polycarbonate, and mint flavor were dried at 0.08 MPa and 120°C for 4 hours.

[0040] Put ethylene-ethyl acrylate-glycidyl methacrylate (the content of glycidyl methacrylate is 5wt%) in a vacuum drying oven, and dry at 0.06MPa and 50°C for 4h.

[0041] 2. Raw material mixing and extrusion

[0042] Take 100 parts by weight of the above-mentioned treated polylactic acid (water content is 0.02wt%), 180 parts by weight of polycarbonate, 5 parts by weight of mint essence and 13 parts by weight of ethylene-ethyl acrylate-glycidyl methacrylate In the screw extruder, when the length-to-diameter ratio is 25, the screw speed is 180r / min, and the tempe...

Embodiment 2

[0046] This example is used to illustrate the plastic composition, plastic and its preparation method provided by the present invention.

[0047] 1. Raw material pretreatment

[0048] Polylactic acid (polylactic acid produced by Natureworks, USA, injection molding grade, viscosity-average molecular weight: 250,000, melting point: 170°C), polycarbonate, and lemon essence were dried at 0.08 MPa and 110°C for 4 hours.

[0049] Put ethylene-propyl acrylate-glycidyl methacrylate (the content of glycidyl methacrylate is 8wt%) in a vacuum drying oven, and dry at 0.06MPa and 50°C for 4h.

[0050] 2. Raw material mixing and extrusion

[0051] Take 100 parts by weight of the above-mentioned treated polylactic acid (water content is 0.02wt%), 200 parts by weight of polycarbonate, 6 parts by weight of lemon essence and 18 parts by weight of ethylene-propyl acrylate-glycidyl methacrylate, 1 weight part Part four [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (an...

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Abstract

The invention provides a plastic composition, and plastic prepared from the plastic composition and a preparation method of the plastic. The plastic composition comprises a polymer matrix, a compatibilizer and an essence. The polymer matrix includes polylactic acid and polycarbonate, and the compatibilizer is an ethylene-acrylate-glycidyl methacrylate copolymer. The plastic prepared from the plastic composition has fragrance and excellent mechanical properties.

Description

technical field [0001] The invention relates to a plastic composition with fragrance, plastic prepared by the composition and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a thermoplastic material with excellent performance. It has excellent impact performance, chemical resistance and dimensional stability. It is widely used in electronic products, such as mobile phones and computer casings. However, polycarbonate materials cannot be degraded, which is not conducive to environmental protection. [0003] Polylactic acid (PLA) is a green material derived from plants. It is made from the fermentation products of agricultural economic crops (jade, cassava, etc.) as the basic raw material. It has good biodegradability and can be completely degraded into carbon dioxide and water after use. , will not pollute the environment. Polylactic acid has good mechanical properties, thermoplasticity, fiber-forming properties, and high transparency. It is...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/04C08L23/08C08K3/26C08K3/34C08K5/134B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92895
Inventor 祝学远何晓斌李江辉
Owner BYD CO LTD
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