Long-acting antifogging agent as well as preparation method and use method thereof

Abstract

The invention discloses a long-acting antifogging agent as well as a preparation method and a use method thereof. The long-acting antifogging agent is prepared from the following raw materials in parts by weight: 70-80 parts of polyglycerol, 20-30 parts of fatty acid, 5-20 parts of acrylate, 0.01-0.03 part of an antioxidant and 25-35 parts of food-grade ethanol. The long-acting antifogging agent disclosed by the invention has the beneficial effects that 1) the long-acting antifogging agent is high in applicability and is suitable for polyethylene resin, polypropylene resin, polyvinyl chloride resin, polystyrene resin, polycarbonate resin, poly(ethylene terephthalate), glass lenses, glass surface layers and other resin; and 2) sulfuric acid is used as a catalyst, the aqueous solution of the prepared antifogging agent is clear and transparent, and the light transmittance reaches more than 80%. (3) the long-acting antifogging agent has toughness in adhesive force and is not easy to crease and white, and the principle is that the compatibility between the antifogging agent and plastic resin is increased by adding acrylate, so that the antifogging agent has toughness, and the migration speed of the antifogging agent is slowed down.

Description

technical field [0001] The invention relates to the technical field of nonionic surfactants, in particular to a long-acting antifogging agent and its preparation and use methods. Background technique [0002] Anti-fogging agent has become a relatively urgent new material at present. At present, almost all anti-fogging agents in the domestic market are imported from developed countries. The types of polyol-type nonionic surfactants commonly used in domestic scientific research institutions include glycerol esters, polyglycerol esters, sorbitan fatty acid esters, ethoxylates, ethoxylated nonylphenols, and ethoxylated alcohols. Polyoxyethyl sorbitan fatty acid esters have anti-fog effects to varying degrees, but because the molecular weight is too low, most of them are less than 500, the decomposition temperature is too low, the migration speed is too fast, and they cannot be wiped or washed with water. Fog effects are temporary or short-lived. [0003] Therefore, it is neces...

AI Technical Summary

Problems solved by technology

[0004] First: At present, the plastic greenhouse film has exceeded 10 million tons in China. Due to the large difference between the climate / greenhouse / and the temperature / humidity outside the greenhouse, a large number of fog droplets are attached to the inner wall of the greenhouse film, which reduces the light transmittance of the greenhouse film. The sunlight cannot be very Good radiation into the greenhouse affects the photosynthesis of crops in the greenhouse

[0005] Second: The domestic demand market for food plastic packaging is huge. The food in food packaging will also affect the appearance of the food due to temperature and humidity, and will damage the food due to the generation of fog.

[0006] Third: Especially through the world’s new crown virus pandemic in 2019, there are a large number of medical staff rushing to the front line of the epidemic. Protection and prevention have become the first element. Protective glasses, protective masks, protective glass, and transparent protection are required Plates are particularly prominent, which requires these protective materials to be free from fog and droplets, which will affect sight and virus isolation

[0008] To sum up, it is particularly important to develop a non-toxic, odorless, biodegradable internally added long-acting anti-fogging agent. However, domestic anti-fogging agents have a short anti-fogging effect because of their single function and fast migration speed. Five days, and most of them are sprayed outside. When encountering hot water, scrubbing will lose the anti-fog effect

[0009] Application number is that the patent document of CN 104530412 A discloses " a kind of synthetic method of polyglycerol fatty acid monoester ", what this invention adopted is basic catalyst (NaCO 3 ), and the biggest disadvantage of basic catalysts is that some fatty acids form water-insoluble fatty acid soaps with alkalinity, which makes the aqueous solution of antifogging agent turbid and reduces transparency