High-efficiency soft PVC antibacterial plastic and preparation method thereof

An antibacterial plastic and PVC resin technology, which is applied in the field of high-efficiency soft PVC antibacterial plastic and its preparation, can solve the problems of strong surface polarity, shortened antibacterial life, toxicity and safety, etc., and achieves stable performance, low price, and low addition amount. Effect

Inactive Publication Date: 2009-09-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic antibacterial agents have good antibacterial effects, but their lifespan is short, and they have toxicity and safety problems, which will cause microbial resistance, poor chemical stability, and easy migration in plastics (resulting in shortened antibacterial lifespan) and other deficiencies.
In addition, the Achilles heel of poor heat resistance of organic antibacterial agents makes it easy to decompose and fail under the processing conditions of high temperature, high pressure and high shear of many plastics, and its decomposition products are even toxic.
Inorganic antibacterial agents are the most widely used silver-based antibacterial agents. The advantages are safety, heat resistance, and durability; the disadvantages are high price and poor antibacterial durability. Silver ions are easy to generate silver oxide or be reduced to metal by photocatalysis. Silver, so there is a defect of discoloring the product
In addition, due to the small particle size, strong surface polarity, and high surface energy of inorganic antibacterial agents, inorganic antibacterial agents are prone to agglomeration and are not easy to disperse uniformly in PVC resin, so that the performance of composite plastics in all aspects cannot meet the expected goals. The surface must be modified first, and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Mix 0.6g methyl tin 181 and 50g DOP, stir well; mix 100g SG3 type PVC resin, 0.2gHSt, 0.5gCaSt, 1.5g calcium-zinc composite stabilizer, 10g light active CaCO 3 and 0.4g of zinc pyrithione were added to the high-speed mixer in turn, fully stirred and mixed; under high-speed stirring, the mixed liquid of methyl tin 181 and DOP was added, fully stirred and mixed, when the temperature rose to 42 ° C, stop stirring, Taking material; mixing and plasticizing the pre-plasticized mixture on a twin-screw extruder, and then extruding to obtain the product of the present invention. The third zone is 150°C, the fourth zone is 155°C, and the head is 155°C.

Embodiment 2

[0052] Mix 0.6g methyl tin 181 and 60g DOP, stir well; mix 100g SG3 type PVC resin, 0.2gHSt, 0.7gCaSt, 1.5g calcium zinc composite stabilizer, 15g light active CaCO 3 and 0.8g of zinc pyrithione were added to the high-speed mixer in turn, fully stirred and mixed; under high-speed stirring, the mixed liquid of methyl tin 181 and DOP was added, fully stirred and mixed, when the temperature rose to 42 ° C, stop stirring, Taking material; mixing and plasticizing the pre-plasticized mixture on a twin-screw extruder, and then extruding to obtain the product of the present invention. The third zone is 150°C, the fourth zone is 155°C, and the head is 155°C.

Embodiment 3

[0054] Mix 0.8g methyl tin 181 and 40g DOP, stir well; mix 100g SG3 type PVC resin, 0.2gHSt, 1.0gCaSt, 1.0g calcium-zinc composite stabilizer, 5g light active CaCO 3 and 0.4g of zinc pyrithione were added to the high-speed mixer in turn, fully stirred and mixed; under high-speed stirring, the mixed liquid of methyl tin 181 and DOP was added, fully stirred and mixed, when the temperature rose to 42 ° C, stop stirring, Taking material; mixing and plasticizing the pre-plasticized mixture on a twin-screw extruder, and then extruding to obtain the product of the present invention. The third zone is 150°C, the fourth zone is 155°C, and the head is 155°C.

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PUM

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Abstract

The invention discloses a high-efficiency soft PVC antibacterial plastic, comprising, based on the weight part, 100 parts of PVC resin, 0.4 to 0.8 part of zinc pyrithione, 40 to 60 parts of DOP, 0.1 to 0.3 part of Hst, 0.5 to 1.0 part of CaSt, 1.0 to 1.5 parts of calcium-zinc compound stabilizing agent, 0.6 to 0.8 part of methyl tin181 and 5 to 15 parts of filling. The invention also discloses a preparation method for the high-efficiency soft PVC antibacterial plastic. The invention has the advantages: the antibacterial property is high, the antibacterial plastic can effectively inhibit the growth of gram positive and negative bacteria and the mould, the zinc pyrithione is taken as the antiseptic, the production is simple, the cost is lower and the performance is steady.

Description

(1) Technical field [0001] The invention relates to a high-efficiency soft PVC antibacterial plastic and a preparation method thereof, which is suitable for soft plastic products such as household pads, food packaging, children's toys and inflatable products. (2) Background technology [0002] The plastic products that people come into contact with in daily life, especially the surfaces of household pads, food packaging, children's toys and inflatable products, may be contaminated and breed a variety of pathogenic bacteria, which will become the infectious agent of diseases, thus affecting human health. threatening. In order to inhibit bacteria, antibacterial plastics prepared by organic antibacterial agents and inorganic antibacterial agents are usually used. Organic antibacterial agents have good antibacterial effect, but their lifespan is short, and they have toxicity and safety problems, and they will have deficiencies such as microbial resistance, poor chemical stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K5/36B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/9185B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 钟明强蒋东升王永忠杨晋涛
Owner ZHEJIANG UNIV OF TECH
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