Precautions for quaternary ammonium ester cationic surfactant

2022-03-11 14:47:03

The cationic surfactant obtained by quaternization of triethanolamine and natural oil can give good softness to the fabric. The amino ester obtained by the reaction of stearic acid, oleic acid, palmitic acid and triethanolamine is mixed with polyoxyethylene glycol laurate and methylated with sulfate to obtain fabric softener. In addition, a new softener amide ethyl imidazoline quaternary ammonium salt can replace dhtdmac. This kind of surfactant has low toxicity and is easy to degrade. Tubingalb, a biodegradable cationic active softener developed by chtr breitlich GmbH in Germany, has high directness and has no effect on fluorescent brightener. The treated fabric feels soft and bulky.

Diesteryl quaternary ammonium salt is obtained by esterification, tertiary amination and quaternization of glutamic acid or aspartic acid and C12 ~ C14 fatty alcohol. Its softening effect on various fabrics is the same as that of dioctadecyl dimethyl quaternary ammonium salt. It has excellent water absorption, antistatic properties, good biodegradability and almost no pollution problem. After mixing me2n (CH2) 3N (ch2ch2oh) 2 with lauric acid at a ratio of 1 ∶ 1, the quaternary ammonium monoester was obtained by quaternization with benzyl chloride, which can be used as fabric softener and lubricant. The compound of quaternary ammonium ester cationic surfactant and polyethylene terephthalate can completely clean the oil stains on the fabric.

This kind of surfactant has poor decontamination ability and can not be combined with anionic surfactant, but it has good antistatic and softness, good sterilization and disinfection ability, and can give good softening effect to the fiber. It is an important and widely used softener at present. Common types include tertiary amine salts and quaternary ammonium salts.

Among them, tertiary amine salts are only cationic in acidic medium, while quaternary ammonium salts are cationic in any medium, which is widely used. BIS octadecyl dimethyl quaternary ammonium salt is a fabric softener with outstanding softness. The ideal effect can be obtained when the dosage is only 0.1% ~ 0.2%. It also has re wetting and antistatic effects, but it has great toxicity and difficult biodegradation; Dihydrotalloyl dimethyl ammonium chloride (dhtdmac), as a softener, has excellent softening effect, but it has poor antistatic and biodegradability, and is easy to be absorbed by sludge in sewage treatment and pollute farmland. In the early 1990s, it was stopped in Germany, the Netherlands and other countries. The new generation of green products are: quaternary ammonium ester, amidoethylimidazoline quaternary ammonium salt, triethanolamine quaternary ammonium salt and ovophosphate quaternary ammonium salt.