Antibacterial solid surface materials containing chitosan-metal complexes

A technology of chitosan and solid surface, applied in the direction of plant growth regulator, preservation of human or animal body, biocide, etc., can solve the problems of loss, reduction of antimicrobial effect of gel coating, etc.

Inactive Publication Date: 2005-04-20
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, when the antimicrobial agent in the gel coat is depleted or the gel coat is abraded or otherwise removed, the antimicrobial effect of the gel coat is significantly reduced or completely lost

Method used

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  • Antibacterial solid surface materials containing chitosan-metal complexes
  • Antibacterial solid surface materials containing chitosan-metal complexes
  • Antibacterial solid surface materials containing chitosan-metal complexes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Preparation of chitosan-silver nitrate complex

[0104] Chitosan (42g, Chitoclear TM Food grade, Primex, Iceland) was dissolved in 2% aqueous acetic acid (1100 mL) and stirred vigorously. A solution of silver nitrate (30 g) in deionized water (100 mL) was added over a period of 10 minutes. A clear viscous gel was obtained. Additional water (300 mL) was added to the gel and stirred for 30 minutes. Concentrated ammonium hydroxide was added dropwise to raise the pH to 7-8. The product was filtered, washed with water (4 x 500 mL) and then with acetonitrile (4 x 500 mL). The resulting product was dried under vacuum for two days, ground into a fine powder, and used to prepare Corian  AB TM Material. The yield of product was 53.7 g. The amount of silver in the complex was determined by Inductively Coupled Plasma Spectroscopy (ICP), an atomic emission spectrometry method in which an Inductively Coupled Plasma is used as an excitation source (see, e.g., Inductively Co...

Embodiment 2

[0107] Preparation of chitosan-silver nitrate complexes with different silver contents

[0108] Five chitosans (each 20 g, Chitoclear TM , Primex, Iceland) in 500 mL of water containing 7.5 mL of acetic acid. There are 7.2g silver nitrate in solution A, B=3.6g, C=1.8g, D=0.9g, E=0.45g silver nitrate. The reactions were carried out as described in the previous examples. Yields of products 1A to 1E ranged from 25 to 30.0 g.

[0109] Silver content analyzed by ICP:

[0110] 1A = 10.5% silver

[0111] 1B = 9.5% silver

[0112] 1C = 5.1% silver

[0113] 1D = 2.2% silver

[0114] 1E = 1.6% silver

Embodiment 3

[0117] In the preparation of the first plate, ordinary chitosan powder (Chitoclear TM , Primex, Iceland) was added to Corian at concentrations of 0.5 wt%, 1.0 wt% and 3 wt%.  materials, mixed and cast into slabs. Such as figure 1 As shown in , no significant antimicrobial activity was observed for these samples.

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PUM

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Abstract

The present invention provides a solid surface material comprising an antimicrobial agent in a thermosetting and / or thermoplastic resin matrix, wherein the antimicrobial agent comprises a chitosan-metal complex.

Description

field of invention [0001] The present invention relates to solid surface materials having antimicrobial properties. Background of the invention [0002] Artificial or synthetic marble is a collective term for various types of materials used as architectural products such as bathroom vanities, sinks, showers and kitchen counter tops and other decorative surfaces. It is also suitable as a material in furniture, backing material and small articles for fixing. Cultured marble is easy to keep clean and tidy. As such, it is increasingly being used in hospitals, nursing homes, and commercial and domestic food preparation facilities. [0003] Artificial marble includes cultured marble, onyx, and solid surface materials that typically include some sort of resin matrix with or without fillers present in the resin matrix. Typically, cultured marble is made from a gel coat of unfilled unsaturated polyester on a filled unsaturated polyester substrate. The filler may be calcium carbon...

Claims

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Application Information

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IPC IPC(8): A47K3/02A01N43/16A47B96/18A47K3/28A61L15/46C08B37/08C08K3/00C08K3/08C08K3/10C08K5/00C08L101/00E03C1/18E04F13/02
CPCA01N43/16A61L15/46A61L2300/104A61L2300/404A61L2300/802C08B37/003C08K5/0058C08K5/0091A01N59/20A01N59/16A01N25/34A01N25/10A01N2300/00C08J5/18C08L5/08C08L23/00C08L77/00
Inventor S·萨贝桑M·C·乔尔格G·T·阿普莱顿
Owner EI DU PONT DE NEMOURS & CO
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