Preparation method of automotive glass antifogging agent

Abstract

The invention relates to a preparation method of an automotive glass antifogging agent. The automotive glass antifogging agent comprises the following raw materials in percentage by mass: 50-99% of nano titanium dioxide hydrosol, 0.02-40% of lignin coupling agent, 0.001-30% of surfactant, 0.01-5% of initiator, 0.001-2% of dispersing agent, 0-10% of compatilizer and 0-10% of acid regulator. The preparation method comprises the following steps: stirring and mixing the nano titanium dioxide hydrosol, lignin coupling agent, initiator and dispersing agent, and sufficiently reacting; then adding a mixture of the surfactant and compatilizer, and stirring for 0.5-4 hours; and regulating the pH value with the pH regulator to obtain the nano antifogging agent having the pH value of 8-10. The antifogging agent has favorable antifogging effect; the addition of the lignin coupling agent and initiator realizes firm bonding and achieves a long-lasting effect; and meanwhile, the antifogging agent is simple in process, low in cost and convenient to use.

Description

technical field [0001] The invention relates to a liquid used for cleaning and anti-fog functions and a preparation method thereof, in particular to a preparation method of an anti-fog agent for automobile glass containing nano-titanium dioxide. Background technique [0002] The pollution and atomization of automobile glass bring a lot of inconvenience to people. There are many ways to remove pollution and prevent atomization, but anti-fogging agent is a relatively economical method with low energy consumption and wide application prospects. [0003] The basic principle of anti-fogging agent is to use surfactant as the main component to form a layer of hydrophilic film on the surface of the base material to prevent the generation of fog beads and maintain the transmittance of light. [0004] At present, some methods of making antifogging agents are to directly apply surfactants to the substrate, and more to coat polymer films on the substrate, which include acrylate antifogg...

AI Technical Summary

Problems solved by technology

[0004] At present, some methods of making antifogging agents are to directly apply surfactants to the substrate, and more to coat polymer films on the substrate, which include acrylate antifogging coatings, organopolysiloxane antifogging agents, Polyoxyethylene polyol antifogging agents, etc., such as U.S. Patent US3212909 discloses a kind of antifogging agent with sodium lauryl sulfonate as the main component; preparation method; European patent EP5244935 discloses a method for realizing anti-fog with a polymer active agent containing a hydroxyl group; however, the anti-fog component in the above-mentioned method lacks effective interaction with the matrix material, resulting in a short duration of anti-fog effect

Chinese patent CN03117059.5 introduces nano titanium dioxide (TiO 2 ) particles, the photocatalytic activity in titanium dioxide will degrade the surface active components in the antifogging agent, which is not conducive to improving the stability and durability of the antifogging agent

Chinese patent 200810099062.7 discloses a method for preparing a silica coating with acidic nano-silica and tetraalkoxysilane Si(OR)4 as components to improve hydrophilicity. It shows anti-fog properties, and at the same time, because a slightly stronger acid promotes the hydrolysis and polymerization of siloxane bonds, the nano-silica particles are easy to agglomerate in the formed network structure with a tendency to gel, resulting in a decrease in stability. In particular, four alkoxysilanes are hydrolyzed under acid catalysis to form chain-like branched silicone polymers. The chain-like silicone polymers have limited interaction with the matrix material, and the absence of surface groups on the chains leads to polymer Lack of toughness and become brittle, making the anti-fog effect of the coating last for a short time