INFLUENCE OF THE HLB OF A NONIONIC ADDITIVE ON THE DETERGENCY OF ALKALINE CLEANERS CONTAINING AN ANIONIC SURFACTANT
COATING AND CHEMICAL LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
The resultant of the combined properties of penetrability, peptization, and wetting, as judged by asphalt detergency, shows synergism on the addition of certain nonionics to medium pHALKALINE CLEANING SOLUTIONS capH12 containing an anionic surfactant. Nonionic additives with HLB values of 13.2 to 17.1 imparted good to excellent asphalt detergency to solutions containing sodium dodecyl sulphate SDS or alkyl straight chain aryl sulphonate SKBS and nonionics with HLB values of 13.4 to 18.18 gave fair to excellent asphalt removal in cleaners containing sodium oleate. In all three systems, asphalt detergency decreased with further increase in nonionic HLB to 19.05. The anionic with the highest HLB SDS formed the most synergistic mixtures in the 13.2 to 17.1 nonionic HLB range. Increasing HLB of the nonionic additives correlates in general with increasing surface tension of their 0.39 solutions and the effectiveness of the nonionics in improving asphalt detergency increases with increasing values of nonionic surface tension until a nonionic HLB of 17.1 is reached. A number of synergistic anionic-nonionic surfactant combinations were developed.
- Solvents, Cleaners and Abrasives