Preparation method of acid-alkali-resistant wetting agent

Abstract

The invention discloses a preparation method of an acid-alkali-resistant wetting agent.The preparation method particularly comprises the steps that 0-15 parts by mass of maleic anhydride, 0-15 parts by mass of dodecyl polyoxyethylene ether, 0-15 parts by mass of nonylphenol polyoxyethylene ether and 0-5 parts by mass of p-toluenesulfonic acid are added into a reaction kettle, the vacuum degree is controlled within the range of 0.095 MPa-0.1 MPa at the temperature of 120 DEG C-220 DEG C, reacting is performed for 2-10 h, an acid value and a hydroxyl value of reaction liquid are measured, and if the acid value and the hydroxyl value do not reach the standard, reacting is continuously performed until the acid value and the hydroxyl value both reach the standard; if the acid value and the hydroxyl value reach the standard, the temperature of the reaction liquid is lowered to 80 DEG C-90 DEG C, 0-8 parts of by mass of sodium hydrogen sulfite and 0-5 parts by mass of sodium acetate are added, stirring is performed for 4 h, and then the acid-alkali-resistant wetting agent is obtained.The wetting agent has the advantages of being good in wetting effect, capable of resisting the extreme conditions of strong acid and strong alkali and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of surfactants, and relates to a preparation method of an acid and alkali resistant wetting agent. Background technique [0002] Wetting agents are composed of hydrophilic groups and lipophilic groups. When in contact with the surface of a wetted object, the lipophilic groups are attached to the surface of the object, and the hydrophilic groups extend outward into the liquid, making The liquid forms a continuous phase on the surface of the object, thereby playing a wetting effect. Wetting agents are mainly used in construction, coatings, paints, dyes, textiles, pesticides, leather and other polymer fields, but in practical applications, due to the There is a big difference in the acidity and alkalinity of the surface of the wetted object, which greatly limits the scope of use of the wetting agent. Contents of the invention [0003] The object of the present invention is to provide a preparation method of ...

AI Technical Summary

Problems solved by technology

[0002] Wetting agents are composed of hydrophilic groups and lipophilic groups. When in contact with the surface of a wet object, the lipophilic groups are attached to the surface of the object, and the hydrophilic groups extend outward into the liquid, making The liquid forms a continuous phase on the surface of the object, thereby playing a wetting effect. Wetting agents are mainly used in construction, coatings, paints, dyes, textiles, pesticides, leather and other polymer fields, but in practical applications, due to the There is a big difference in the acidity and alkalinity of the surface of the wetted object, which greatly limits the scope of use of the wetting agent