High-hardness and high-flowability PC/PMMA/AS (polycarbonate/polymethyl methacrylate/acrylonitrile-styrene copolymer) alloy and preparation method thereof

A technology of alloys and high-speed mixers, which is applied in the field of polymer materials, can solve the problems of failure to reasonably solve the scratch resistance of PC alloys, poor fluidity and gloss of alloys, and insufficient surface hardness, so as to avoid post-processing The effect of process, high melt index and good mechanical properties

Active Publication Date: 2012-12-05
深圳市中塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has some obvious disadvantages: poor fluidity, insufficient surface hardness, poor chemical resistance, etc.
In view of the shortcomings of polycarbonate, this problem is solved by blending polycarbonate and polymethyl methacrylate in the prior art: patent 201010153417.3 discloses a method of adding polymethyl methacrylate to polycarbonate to obtain A PC / PMMA alloy with high hardness, high strength, and good chemical resistance, but this alloy solves the problem of chemical resistance, and fails to reasonably solve the scratch resistance of PC alloy; patent 201210005100.4 discloses a polycarbonate Add polymethyl methacrylate and anti-scratch modifier to obtain high hardness PC alloy, but the fluidity and gloss of the alloy are deteriorated by adding anti-scratch modifier

Method used

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  • High-hardness and high-flowability PC/PMMA/AS (polycarbonate/polymethyl methacrylate/acrylonitrile-styrene copolymer) alloy and preparation method thereof
  • High-hardness and high-flowability PC/PMMA/AS (polycarbonate/polymethyl methacrylate/acrylonitrile-styrene copolymer) alloy and preparation method thereof
  • High-hardness and high-flowability PC/PMMA/AS (polycarbonate/polymethyl methacrylate/acrylonitrile-styrene copolymer) alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A PC / PMMA / AS alloy with high hardness and high fluidity, its raw material composition and parts by weight are:

[0039]

[0040] The preparation method of above-mentioned PC / PMMA / AS alloy comprises the steps:

[0041] (1) Dry polycarbonate (PC) at 110°C for 6 hours, polymethyl methacrylate (PMMA) and acrylonitrile-styrene copolymer (AS) at 80°C for 6 hours; after cooling, put Add polycarbonate, polymethyl methacrylate, and acrylonitrile-styrene copolymer to a high-speed mixer for pre-mixing;

[0042] (2) After adding toughening agent EMA, compatibilizer GMA-g-EMA, antioxidant 1076, antioxidant 168 and PETS to another high-speed mixer for mixing, add the mixture to step (1) Mix in a high-speed mixer;

[0043] (3) Place the mixed pre-mixture in a parallel twin-screw extruder for melt extrusion and granulation. The process parameters are as follows: the temperature of the first zone is 220°C, the temperature of the second zone is 225°C, the temperature of the third zo...

Embodiment 2

[0045] A PC / PMMA / AS alloy with high hardness and high fluidity, its raw material composition and parts by weight are:

[0046]

[0047] The preparation method of above-mentioned PC / PMMAAS alloy comprises the steps:

[0048] (1) Dry polycarbonate (PC) at 110°C for 6 hours, polymethyl methacrylate (PMMA) and acrylonitrile-styrene copolymer (AS) at 80°C for 6 hours; after cooling, put Add polycarbonate, polymethyl methacrylate, and acrylonitrile-styrene copolymer to a high-speed mixer for pre-mixing;

[0049] (2) After adding toughening agent EMA, compatibilizer GMA-g-EMA, antioxidant 1076, antioxidant 168 and PETS to another high-speed mixer for mixing, add the mixture to step (1) Mix in a high-speed mixer;

[0050](3) Put the mixed pre-mixture in a parallel twin-screw extruder to melt and extrude, and granulate. The process parameters are as follows: the temperature of the first zone is 200°C, the temperature of the second zone: 205°C, the temperature of the third zone is ...

Embodiment 3

[0052] A PC / PMMA / AS alloy with high hardness and high fluidity, its raw material composition and parts by weight are:

[0053]

[0054] The preparation method of above-mentioned PC / PMMA / AS alloy comprises the steps:

[0055] (1) Dry polycarbonate (PC) at 110°C for 6 hours, and dry polymethyl methacrylate (PMMA) and acrylonitrile-styrene copolymer (AS) at 80°C for 6 hours. After cooling, polycarbonate, polymethyl methacrylate, and acrylonitrile-styrene copolymer are added to a high-speed mixer for pre-mixing;

[0056] (2) After adding toughening agent EMA, compatibilizer GMA-g-EMA, antioxidant 1076, antioxidant 168 and PETS to another high-speed mixer for mixing, add the mixture to step (1) Mix in a high-speed mixer;

[0057] (3) Place the mixed pre-mixture in a parallel twin-screw extruder to melt and extrude and granulate. The process parameters are as follows: the temperature of the first zone is 215°C, the temperature of the second zone is 220°C, the temperature of the...

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Abstract

The invention discloses a PC / PMMA / AS (polycarbonate / polymethyl methacrylate / acrylonitrile-styrene copolymer) alloy and a method thereof. The PC / PMMA / AS alloy with excellent mechanical properties, high hardness and high flowability is prepared. The PC / PMMA / AS alloy comprises the following raw materials in part by weight: 52-80 parts of polycarbonate, 10-20 parts of polymethyl methacrylate, 7-15 parts of acrylonitrile-styrene copolymer, 1-5 parts of ethylene-methyl acrylate copolymer, 1-5 parts of ethylene-methyl acrylate copolymer grafted glycidyl acrylate, 0.1-1 part of main antioxidant, 0.1-1 part of auxiliary antioxidant and 0.1-1 part of lubricating agent. The prepared PC / PMMA / AS alloy can be used for preparing communication equipment housings and electronic appliance product housings with higher requirements on surface hardness and surface luster.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PC / PMMA / AS alloy with high hardness and high fluidity and a preparation method thereof. Background technique [0002] Polycarbonate (PC) has high impact strength and excellent mechanical, thermal, and electrical properties, and is widely used in automobiles, aerospace, medical equipment, electronic appliances, electrical appliances, display casings, communication equipment casing components, etc. field. However, it also has some obvious disadvantages: poor fluidity, insufficient surface hardness, poor chemical resistance, etc. [0003] Polymethyl methacrylate (PMMA) is a thermoplastic with a density of 1.19 to 1.20. It has extremely high transparency and a transmittance as high as 91% to 93%. times, the mechanical strength and toughness are more than 10 times greater than that of ordinary glass, the hardness is more than 2H before treatment, and the surface hardness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L33/12C08L25/12C08L23/08C08L51/06C08K5/134C08K5/526C08K5/103B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 朱怀才杨东方王忠强
Owner 深圳市中塑新材料有限公司
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