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Antistatic, antibacterial, halogen-free and flame-retardant PC/ABS composition and preparation method thereof

A composition and antistatic technology, applied in the field of PC/ABS composite materials, can solve the problems of breeding bacteria, high surface resistance, affecting the appearance of products, etc., and achieve the effect of preventing the breeding of bacteria

Inactive Publication Date: 2020-06-23
上海瑞昱实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface resistance of existing halogen-free flame-retardant PC / ABS products is relatively high, about 1×10 16 ~1×10 17 Ω, which makes its products easy to be charged and absorb dust and breed bacteria, which affects the appearance of the final product and indoor air biological pollution. If the static electricity accumulates to a high level, it will cause fire and cause some electrical products to short-circuit and explode.

Method used

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  • Antistatic, antibacterial, halogen-free and flame-retardant PC/ABS composition and preparation method thereof
  • Antistatic, antibacterial, halogen-free and flame-retardant PC/ABS composition and preparation method thereof

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Experimental program
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Effect test

Embodiment 1～4

[0021] The raw materials are shown in Table 1.

[0022] ABS is 8391 from Gaoqiao Petrochemical Company; PC is SABIC 2200R, its polycarbonate weight content is 70%, and its melt index is 20.5g / 10min (300℃×1.2kg); BDP is produced by Zhejiang Wansheng with a phosphorus content of 8.5 %,; the toughening agent is DuPont AC@1330, the antistatic agent is single-walled carbon nanotubes produced in Russia; the antioxidant is 168 from Ciba Specialty Chemicals.

[0023] Table 1

[0024] Raw materials (parts by weight) Example 1 Example 2 Example 3 Example 4 ABS8391 10 10 10 10 PC2200R 74 74 74 74 BDP 13 13 13 13 AC@1330 3 3 3 3 antistatic agent 0.1 0.2 0.3 0.4 Silver ion antibacterial agent 0.1 0.2 0.3 0.6 antioxidant 0.2 0.2 0.2 0.2

[0025] Add the above-mentioned raw materials into a high-speed mixer in turn and mix at high speed for 2 minutes, then place the fully mixed mixture in a twin-screw extrud...

Embodiment 5

[0030] Chitosan modified carbon nanotubes are self-made, the specific process is as follows:

[0031] (1) After mixing concentrated sulfuric acid (98%) and concentrated nitric acid (68%) at a volume ratio of 3:1, add single-walled carbon nanotubes, react at 70°C for 3 hours, centrifuge, wash, and dry to obtain carboxylated carbon nanotube.

[0032] (2) dissolving chitosan in the acetic acid solution of pH=5, adding carboxylated carbon nanotubes, the consumption of chitosan is 10% of the quality of carboxylated carbon nanotubes, after stirring for 5h, centrifugal, washing, Dry to obtain chitosan-modified carbon nanotubes.

Embodiment 6

[0034] Chitosan modified carbon nanotubes are self-made, the specific process is as follows:

[0035] (1) adding concentrated nitric acid (68%) to single-walled carbon nanotubes, ultrasonically reacting at 120°C for 3h, centrifuging and washing, then dispersing the carbon nanotubes in water, adding potassium permanganate (concentration is 1g / L) and After reacting with perchloric acid (concentration: 10 wt%) for 10 min, the reaction was quenched with citric acid, centrifuged, washed, and dried to obtain carboxylated carbon nanotubes.

[0036] (2) dissolving chitosan in the acetic acid solution of pH=6, adding carboxylated carbon nanotubes, the consumption of chitosan is 3% of the quality of carboxylated carbon nanotubes, after stirring for 5h, centrifugal, washing, Dry to obtain chitosan-modified carbon nanotubes.

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Abstract

The invention discloses an antistatic, antibacterial, halogen-free and flame-retardant PC / ABS composition. The composition is prepared from the following components in parts by weight: 10 to 30 partsof styryl block copolymer resin, 40 to 80 parts of polycarbonate, 10 to 30 parts of phosphate, 0 to 10 parts of toughening agent, 0.1 to 0.6 part of carbon nano tube and 0.1 to 0.6 part of silver ionantibacterial agent. Compared with the existing halogen-free flame-retardant PC / ABS, the halogen-free flame-retardant PC / ABS has the advantages, the carbon nanotubes are added; a conductive channel can be established in the polymer to bring charges to a ground wire to form a conductive network; the silver ion antibacterial agent can react with cell wall peptidoglycan adsorbed on bacteria on the surface of the product to cause bacterial dysfunction, and finally cell wall rupture is caused, so that bacteria are killed, and the antibacterial effect of the product is achieved.

Description

technical field [0001] The invention belongs to the field of PC / ABS composite materials, and in particular relates to an antistatic, antibacterial, halogen-free, flame-retardant PC / ABS composition and a preparation method thereof. Background technique [0002] PC / ABS, a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer, is a combination of polycarbonate (Polycarbonate, PC) and acrylonitrile-butadiene-styrene copolymer (ABS) The thermoplastic plastic combines the excellent characteristics of the two materials, the formability of the ABS material and the mechanical properties, impact strength, temperature resistance, and ultraviolet (UV) resistance of the PC material. Adding phosphate ester to the material can make the material reach UL94 1.6mm flame retardant V-0 level. Once a fire occurs, it will not produce toxic and corrosive hydrogen halide gas during combustion, which will cause secondary harm to the human body and the environment. These advantages...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L55/02C08L23/08C08K5/523C08K9/04C08K9/02C08K3/04C08K5/526C08K13/06
CPCC08K2201/017C08L69/00C08L2201/02C08L2201/04C08L2201/22C08L2205/03C08L55/02C08L23/0869C08K5/523C08K9/08C08K9/02C08K3/041C08K5/526C08K13/06
Inventor 刘建波廖志荣凌雅
Owner 上海瑞昱实业有限公司
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