Long-service-life organic silicon polymer antibacterial liquid, preparation method thereof and preparation method of antibacterial coating

Abstract

The invention belongs to the field of antibacterial materials and discloses long-service-life organic silicon polymer antibacterial liquid, a preparation method thereof and a preparation method of antibacterial coating. The long-service-life organic silicon polymer antibacterial liquid comprises, by weight, 60-80 parts of organosilicon quaternary ammonium salt, 3-8 parts of glacial acetic acid, 5-10 parts of methyltris(methylethylketoximino)silane, 0.1-3 parts of organic bismuth catalyst and 10-20 parts of amino-alkyl alkoxy silane. The organic silicon polymer antibacterial and anti-mildew liquid is simple in preparation process, safe, nontoxic, green, environmentally friendly, lasting and high in antibacterial effect, long in service life and capable of satisfying the living space requirements of safety, health and cleanness and conforms to the green and environment-friendly consumption concept of people.

Description

technical field [0001] The invention belongs to the field of antibacterial materials, in particular to a long-life organic silicon polymer antibacterial liquid, a preparation method thereof, and a preparation method of an antibacterial coating. Background technique [0002] Antibacterial coating technology has always been an effective means to resist harmful bacteria from invading human beings. Antibacterial coatings in a broad sense are composed of adhesives (usually a resin or emulsion), antibacterial agents, various additives, etc., and then coated on the surface of different substrates to obtain a coating with antibacterial function. ; Wherein, antibacterial agent can be organic antibacterial agent or inorganic antibacterial agent. [0003] Antibacterial coatings currently on the market mainly include two categories: (1) UV / TiO 2 Photocatalytic antibacterial coatings; (2) antibacterial coatings doped with silver ions as antibacterial agents, but these two technologies ...

AI Technical Summary

Problems solved by technology

However, this coating cannot achieve antibacterial effect without UV light or in the dark, thus greatly limiting its antibacterial application indoors.

[0005] Silver-based antibacterial coatings have three major defects: (1) Although they can show good antibacterial properties without ultraviolet light, after long-term use, the coatings are likely to cause discoloration of the surface of silver-loaded products, ranging from light yellow to brown-black The greater the concentration of silver ions incorporated, the darker the color becomes, which seriously affects the appearance of the product

(2) The silver-doped coating is to slowly release silver ions to achieve the killing effect on bacteria. Over time, the release of silver ions will eventually be exhausted, resulting in failure. Therefore, the antibacterial coating doped with silver ions The service life of the layer is limited, generally about 1 to 3 years

(3) Silver ion is also a well-known heavy metal ion, which will cause protein denaturation after being absorbed by the human body, make the protein inactive, and have toxicity to the human body

[0006] Chinese patent CN1850924A discloses a nano-silver antibacterial coating and its manufacturing method, which uses hydroxyacrylic resin or acrylic synthetic emulsion as an adhesive, uses nano-silver as an antibacterial agent, and prepares a small amount of additives and water. The resulting coating opaque

[0009] Most of the antibacterial coatings obtained from these antibacterial coatings rely on binders such as resins or emulsions to ensure a certain durability of the coating; although a large amount of antibacterial agents are added to enhance the antibacterial ability of the coating, in fact most of them All antibacterial agents are covered by adhesives such as resins or emulsions, and only the bare most surface antibacterial agent can play an antibacterial effect. Relatively speaking, the effective antibacterial agent on the surface of the coating is a very small amount.

Therefore, the antibacterial coatings obtained by these antibacterial coatings usually show less than ideal antibacterial effects in practical applications.

In addition, such coatings usually add some fillers to make the coating opaque and cover the texture of the substrate surface, thus affecting the appearance of the substrate and limiting the application of such antibacterial coatings

Furthermore, the antibacterial agent exposed on the coating surface is easy to fall off due to the slow dissolution of itself or the friction in the long-term use, resulting in a shorter antibacterial life of the coating.

[0010] Chinese patent CN107987722A discloses organosilicon sterilizing liquid, organosilicon bactericide, antibacterial glass and its preparation method and application. It uses organosilicon quaternary ammonium salt as antibacterial agent without binders such as resin or emulsion, and the bactericidal rate can reach 99%. above, and the resulting coating is also transparent and colorless, but the patent does not mention how long the service life of the coating is

[0012] In general, among the many invention patents of antibacterial and antifungal coatings, no resin or emulsion and other adhesives are used to achieve strong adhesion between the antibacterial agent and the substrate, the coating is colorless and transparent, and the antibacterial rate is as high as More than 99.9%, and the coating antibacterial life of more than 20 years has not been reported

Images