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Nanometer titania antibacterial plastic and production process thereof

A technology of nano-titanium dioxide and antibacterial plastics, applied in the field of antibacterial plastics, can solve the problems of difficult dispersion, shedding and shedding of titanium dioxide particles, and achieve the effect of improving antibacterial durability, uniformity and dispersion uniformity

Inactive Publication Date: 2018-06-05
GUANGDONG GUOLI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the existing plastic resin is cured, it loses its adhesion performance, and the titanium dioxide particles are easy to fall off from the plastic resin, especially after long-term use, the titanium dioxide particles on the surface of the plastic will fall off more, which seriously reduces the antibacterial durability of the plastic. performance
In addition, the diameter of titanium dioxide particles is very small and is in powder form. It is not easy to disperse in organic matter, and it is easy to unite, resulting in uneven antibacterial properties of plastics, and the agglomerated titanium dioxide particles are also easy to fall off in plastic resins.

Method used

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  • Nanometer titania antibacterial plastic and production process thereof
  • Nanometer titania antibacterial plastic and production process thereof
  • Nanometer titania antibacterial plastic and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1: Preparation of Epoxy Modified Resin

[0043] (1) According to the formula, weigh 380g of polyacrylic acid, 285g of epoxy resin, 285g of butyl acetate, 5g of methylmagnesium iodide and 14g of hydroxyethyl methacrylate. Mix to obtain the first mixture, then mix the epoxy resin with methylmagnesium iodide to obtain the second mixture, mix the first mixture, the second mixture and butyl acetate and react at 100°C for 3h, Obtain epoxy-modified resin, stand-by;

[0044] The second step: surface treatment of nano-titanium dioxide:

[0045] (1) Weigh 4.2 g of nano-titanium dioxide and 8.4 g of water, and mix them uniformly under ultrasonic treatment, so that the nano-titanium dioxide is quickly dispersed, the mixing temperature is 60 ° C, and the mixing time is 20 minutes to obtain a titanium dioxide dispersion;

[0046] (2) Weigh 4.2 g of hydroxyethyl quaternary ammonium salt, add it into the titanium dioxide dispersion and mix, and continue to mix with ultrasonic co...

Embodiment 2

[0060] Step 1: Preparation of Epoxy Modified Resin

[0061] (1) Weigh respectively 432g of polyacrylic acid, 356g of epoxy resin, 285g of butyl acetate, 9g of methylmagnesium iodide and 20g of hydroxyethyl methacrylate, first mix polyacrylic acid and hydroxyethyl methacrylate to obtain the first One mixture, then epoxy resin is mixed with methylmagnesium iodide to obtain a second mixture, the first mixture, the second mixture and butyl acetate are mixed and reacted at 110°C for 5h to obtain epoxy Modified resin, ready for use;

[0062] The second step: surface treatment of nano-titanium dioxide:

[0063] (1) Weigh 7.5 g of nano-titanium dioxide and 14 g of water, and mix them uniformly under ultrasonic treatment, so that the nano-titanium dioxide is quickly dispersed, the mixing temperature is 70 ° C, and the mixing time is 40 minutes to obtain a titanium dioxide dispersion;

[0064] (2) Weigh 7.5g of hydroxyethyl quaternary ammonium salt, add it into the titanium dioxide di...

Embodiment 3

[0078] Step 1: Preparation of Epoxy Modified Resin

[0079] (1) Weigh respectively 521g of polyacrylic acid, 278g of epoxy resin, 256g of butyl acetate, 10g of methylmagnesium iodide and 25g of hydroxyethyl methacrylate, first mix polyacrylic acid and hydroxyethyl methacrylate to obtain the first One mixture, then epoxy resin is mixed with methylmagnesium iodide to obtain a second mixture, the first mixture, the second mixture and butyl acetate are mixed and reacted at 110°C for 5h to obtain epoxy Modified resin, ready for use;

[0080] The second step: surface treatment of nano-titanium dioxide:

[0081] (1) Weigh 4.7 g of nano-titanium dioxide and 14 g of water, and mix them uniformly under ultrasonic treatment, so that the nano-titanium dioxide is quickly dispersed, the mixing temperature is 70 ° C, and the mixing time is 40 minutes to obtain a titanium dioxide dispersion;

[0082] (2) Weigh 4.7g of hydroxyethyl quaternary ammonium salt, add it into the titanium dioxide d...

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Abstract

The invention relates to the technical field of antibacterial plastics and in particular relates to a nanometer titania antibacterial plastic and a production process thereof. The nanometer titania antibacterial plastic is prepared from 70-90 parts of epoxy modified resin, 0.2-1 part of a plasticizer, 0.2-1.5 parts of a foaming agent, 0.5-1 part of ethylene bis-stearamide, 0.5-1 part of zinc stearate, 0.1-0.7 part of an initiator, 0.2-0.8 part of an antioxidant, 0.3-0.8 part of a surfactant, 0.3-0.8 part of nanometer titania and 1-2 parts of water. The nanometer titania antibacterial plastic has uniform and lasting antibacterial effects. The production process of the nanometer titania antibacterial plastic comprises the following steps: 1, preparing epoxy modified resin; 2, performing surface treatment on nanometer titania; 3, performing melt mixing on the epoxy modified resin and the nanometer titania subjected to surface treatment; and 4, performing extruded granulation. The nanometer titania antibacterial plastic has the advantage of being easy to operate.

Description

technical field [0001] The invention relates to the technical field of antibacterial plastics, in particular to a nano-titanium dioxide antibacterial plastic and a production process thereof. Background technique [0002] Since most diseases are caused by a series of reactions caused by bacteria, molds, etc. as pathogenic bacteria invading humans and animals, it has become a trend to make antibacterial plastics from plastics that are widely used in human activities. Existing artificial synthetic materials are divided into inorganic antibacterial materials and organic antibacterial materials. Among them, organic antibacterial synthetic materials have problems such as poor antibacterial properties, poor heat resistance and stability, and are restricted in use. Therefore, inorganic antibacterial materials are now used as the main host. [0003] In recent years, titanium dioxide antibacterial plastics have been extensively studied. This is because titanium dioxide can undergo p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08K13/06C08K5/098C08K5/20C08K9/04C08K3/22C08J9/30C08G81/02
CPCC08G81/024C08J9/0023C08J9/0028C08J9/0033C08J9/0071C08J9/009C08J9/30C08J2387/00
Inventor 罗文平
Owner GUANGDONG GUOLI SCI & TECH CO LTD
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