Abstract: The basic properties (foaming performance,emulsification performance,wetting ability,detergency and water solubility) of fatty acid methyl ester ethoxylates FMEE-24-9 were tested and formed a contrast with AEO-9.A preliminary study was conducted on the replacement of AEO-9 by FMEE-24-9 in concentrated laundry detergent.The effect of FMEE-24-9 in place of AEO-9 on detergent foaming performance,stability and detergency in a concentrated laundry detergent formula system was examined.Results show that the FMEE-24-9 aqueous solution at the mass fraction of about 50%,the viscosity of which is at its maximum value,and no gel is found.Compared with AEO-9,FMEE-24-9 has a lower foaming performance,better wetting ability and water solubility while equivalent detergency.The use of FMEE-24-9 instead of AEO-9 in a concentrated laundry detergent formula system shows a minor change in foaming performance and stability,and the detergency has been slightly improved.

Key words: fatty acid methyl ester ethoxylates, performance, concentrated laundry detergent, applied research