Solid powdery organosilicon quaternary ammonium salt antibacterial agent and preparation method thereof

Abstract

The invention relates to a solid powdery organosilicon quaternary ammonium salt antibacterial agent, wherein silicon quaternary ammonium salt is used as the main component of the antibacterial agent; boric acid or octyl isothiazolinone is used as the synergist of the antibacterial agent; precipitated silica, the specific surface area of which is more than 150 m<2>/g is used as the carrier; and anhydrous silica gel, anhydrous calcium chloride and the like are used as the desiccants. The disadvantages of being high in investment and technical difficulty in the prior art are overcome; a solvent is unnecessary to distil off; the silicon quaternary ammonium salt is also unnecessary to react with triethanolamine or urea; the only necessary thing is to spray organosilicon quaternary ammonium salt stoste and the synergist in inorganic powder with the specific surface area of being more than 100 m<2>/g and mix uniformly; the solid powdery organosilicon quaternary ammonium salt antibacterial agent can be stored for a long time after being packaged in a sealing manner; the content of the organosilicon quaternary ammonium salt in the solid powder can be more than 30%, some 50%; and the content of the organosilicon quaternary ammonium salt is determined by the concentration of the initial organosilicon quaternary ammonium salt and the specific surface area and the use amount of carrier powder.

Description

technical field [0001] The invention belongs to the technical field of antibacterial agents, and relates to a solid powdery organic silicon quaternary ammonium salt antibacterial agent and a preparation method thereof. Background technique [0002] Organosilane antimicrobial agent γ-(trimethoxysilyl)propyloctadecyldimethylammonium chloride is a broad-spectrum general-purpose reactive water-resistant and durable antibacterial agent. Invented by Dow Corning in the 1970s, it generally exists as a liquid or paste product with a content of 40%, 60% or 72%. The defect of liquid packaging is that the product contains methanol, ethanol, isopropanol and other alcohols Alcohols have a low boiling point, are flammable, explosive, unsafe, and some are poisonous (such as methanol). The present invention disperses and adsorbs high-concentration (60-72%) organosilane quaternary ammonium salts and synergists such as boric acid and isothiazoline on the powdery silica carrier with large spec...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that some high-boiling point solvents are not easy to evaporate, and manufacturers generally use high-boiling point solvents to increase the reaction temperature to above 100°C in order to speed up the reaction rate of silane quaternary ammonium salts.