Organosilicon antimicrobial solution, organosilicon antimicrobial agent, antimicrobial glass, preparation method therefor and use thereof
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Publication Number
US-11219217-B2
Publication Date
2022-01-11
Expiration Date
Abstract
An organosilicon antimicrobial solution, an organosilicon antimicrobial agent, an antimicrobial glass, a preparation method therefor, and use thereof. The organosilicon antimicrobial solution comprises, in percentage by mass: 30% to 65% of an organosilicon quaternary ammonium salt; 10% to 40% of ethyl orthosilicate; 10% to 40% of a double bond-containing organosilicon; 5% to 20% of an epoxy group-containing organosilicon; 5% to 20% of methyltrimethoxysilane; and 0.1% to 3% of an organotin catalyst. The organosilicon quaternary ammonium salt is selected from at least one of methyldiethoxysilane quaternary ammonium salt, N,N-dimethyl-N-octadecylaminopropyltrimethoxysilane quaternary ammonium salt, (trimethoxysilylpropyl)octadecyldimethylammonium chloride and 3-(trimethoxysilyl)propyldimethyldodecylammonium chloride. An antimicrobial glass prepared by the organosilicon antimicrobial solution above has strong versatility and small influence on the light transmittance of the glass.
Core Innovation
The disclosed invention provides an organosilicon antimicrobial solution that is used to prepare bactericidal glass. The solution includes an organosilicon quaternary ammonium salt, tetraethyl orthosilicate, an organosilicon containing double bond, an organosilicone containing an epoxy group, methyltrimethoxysilane, and an organotin catalyst, with defined by-weight mass percentage ranges for each component.
The method forms bactericidal glass by reacting the organosilicon quaternary ammonium salt and the other specified organosilicon components at 40°C to 80°C for 1 hour to 8 hours, followed by coating the glass surface with the silicone bactericide obtained from the solution. The coated layer is then baked/curried to cure the silicone bactericide and obtain a bactericidal film.
The bactericidal film is described as providing effective sterilization without UV, while maintaining strong adhesion to glass via covalent bonding to glass hydroxyl groups. The film is further characterized by wear resistance and resistance to acid, alkali, disinfectant, solvent, boiling water, and UV, and by minimal impact on visible light transmittance with a reported decrease of ≤~3%.
Claims Coverage
The independent claim is clm-00001. It covers a method of preparing bactericidal glass by coating glass with a silicone bactericide formed from a specifically defined organosilicon-quaternary-ammonium formulation with constrained component mass percentages, and curing it by baking.
Coating silicone bactericide from a defined organosilicone bactericidal solution
Coating a silicone bactericide on a glass surface, wherein the silicone bactericide is obtained by reacting an organosilicone bactericidal solution comprising 30% to 65% of organosilicone quaternary ammonium salt, 10% to 40% of tetraethyl orthosilicate, 10% to 40% of organosilicone containing double bond, 5% to 20% of organosilicone containing epoxy group, 5% to 20% of methyltrimethoxysilane, and 0.1% to 3% of organic tin catalyst.
Specific organosilicone quaternary ammonium salt selection and reaction conditions
Wherein the organosilicone quaternary ammonium salt is at least one selected from methyldiethoxysilane ammonium chloride, N,N-dimethyl-N-octadecylaminopropyltrimethoxysilane ammonium chloride, (trimethoxysilylpropyl)octadecyldimethyl ammonium chloride, and 3-(trimethoxysilyl)propyldimethyldodecyl ammonium chloride at a temperature of 40°C to 80°C for 1 hour to 8 hours.
Baking treatment to cure the silicone bactericide and obtain bactericidal glass
Performing a baking treatment to the silicone bactericide coated on the glass surface to cure the silicone bactericide, thus obtaining the bactericidal glass.
Selecting vinyl double-bond organosilane
Using the organosilicone containing double bond selected from vinyltrimethoxysilane and vinyltriethoxysilane.
Selecting epoxy-functional organosilane
Using the organosilicone containing an epoxy group selected from γ-(2, 3-epoxypropoxy)propyltrimethoxysilane, 3-(2, 3-epoxypropoxy)propyltriethoxysilane, and 3-(2, 3-epoxypropoxy)propylmethyldiethoxysilane.
Selecting organic tin catalyst from specified tin compounds
Using an organic tin catalyst selected from dibutyltin diacetate, dibutyltin dilaurate, stannous octoate, or dibutylbis(dodecylthio)tin.
Baking at 260°C to 300°C for 10 to 15 minutes
Performing the baking treatment at a temperature ranging from 260°C to 300°C for a duration of 10 to 15 minutes.
The inventive coverage centers on preparing bactericidal glass by coating glass with a silicone bactericide formed from an organosilicon bactericidal solution having specified mass percentage ranges and defined quaternary ammonium salt selection, followed by baking to cure the coated bactericide into bactericidal glass; dependents further specify vinyl double-bond organosilane and epoxy-functional organosilane selections, constrain the organic tin catalyst to named tin compounds, and set baking temperature and time ranges.
Stated Advantages
Effective sterilization without UV.
Strong adhesion via covalent bonding to glass hydroxyl groups.
Wear resistance.
Resistance to acid, alkali, disinfectant, solvent, boiling water, and UV.
Minimal impact on visible light transmittance (reported decrease ≤~3%).
Documented Applications
Hollow glass.
Low emissivity glass.
Laminated glass.
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