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Antimicrobial glass and glass ceramic surfaces

An anti-microbial, glass powder technology, used in biocides, animal repellents, plant growth regulators, etc., can solve the problems of insufficient fungicidal effect and no anti-microbial effect.

Inactive Publication Date: 2006-11-01
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antimicrobial action of glass disclosed in WO 03 / 018495 is not sufficient for some applications such as fungicidal action in plastics
[0010] The ground glass-ceramic powders of the composition of the above-mentioned patents also show that the antimicrobial effect is not sufficient when the glass-ceramics are ground into glass powders

Method used

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  • Antimicrobial glass and glass ceramic surfaces
  • Antimicrobial glass and glass ceramic surfaces
  • Antimicrobial glass and glass ceramic surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0113]The present invention is described below based on examples.

[0114] In Table 1 are given examples of glass compositions which produce an antimicrobial surface by ion exchange in solution.

[0115] Example 1

SiO 2

71.2

al 2 o 3

0.35

CaO

9.6

MgO

4.0

Fe 2 o 3

0.1

Na 2 o

14.1

K 2 o

0.05

[0116] The glass given in Table 1 refers to a soda-lime glass which has the composition (% by weight) given in Table 1.

[0117] The glasses given in Table 1 have been ground once in an inert solution, ie in water. This glass powder was used as a control sample in terms of antimicrobial activity.

[0118] In order to demonstrate the increased antimicrobial effect due to the antimicrobial treatment according to the invention, the glasses of Table 1 were firstly ground in a zinc nitrate solution and in another configuration in a silver nitrate solution.

[0119] The developm...

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Abstract

The invention relates to a water-insoluble silicate glass powder comprising glass particles that have the following composition (in wt. % on an oxide basis): SiO2 20-80; Na2O 5-30; K2O 0-5; P2O5 0-15; B2O3 0-10; CaO 4-30; MgO 0-8; AI2O3 0-7; Fe2O3 0-2; and common quantities of standard refining agents. The invention is characterized in that the glass particles contain at least one of the components ZnO, AgO, CuO, CeO2, GeO2, and TeO2, said components being concentrated in the subsurface of the glass particles.

Description

technical field [0001] The present invention relates to a method for producing antimicrobial glass surfaces of largely inert glass powders and glass-ceramic powders. Background technique [0002] The antimicrobial effect of silver ions is known and used in various fields, eg in water purification (AgCl) or in the medical field. At this time, silver has no safety problems for human beings. [0003] Silver-containing glass powders are described as inorganic antimicrobial agents in a series of patents. Glasses with low hydrolytic stability are generally referred to here. At this point, the glass tends to dissolve at least partially in aqueous systems or to donate ions very strongly. [0004] In US 5,290,544 a water soluble glass for use in cosmetic products is described which has a very small amount of SiO 2 and a very high B 2 o 3 or high P 2 o 5 content. Such glasses have a silver concentration greater than 0.5% by weight. Such glasses have very low hydrolytic stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00A01N25/34A01N59/16A01N59/20C03C3/087C03C10/00C03C21/00
CPCA01N59/16A01N59/20C03C3/087C03C10/0027C03C12/00C03C21/005C03C2204/02Y10T428/315Y10T428/31A01N25/34A01N25/08A01N2300/00
Inventor 约尔格·欣里希·费希纳若泽·齐默尔贝恩德·德拉普弗兰克·托马
Owner SCHOTT AG
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