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Amphoteric Surfactants in Alkaline Cleaners
COATING AND CHEMICAL LAB ABERDEEN PROVING GROUND MD
The object of this study was to explore the detergency and physical characteristics of soak alkaline cleaning compounds containing amphoteric surfactants to determine whether such compounds could be developed that would be satisfactory Fed. Spec. P-C-436a cleaners. Using the test procedures of P-C-436a, an investigation was make of alkaline cleaners containing amphoteric surfactants of the quaternary imidazolium hydroxide type. Compounds containing the amphoteric surfactant as the only additive were ineffective asphalt removers. Good asphalt and miner oil detergency was obtained from developed cleaners containing specific amounts of the undecyl or coconut oil amphoteric combined with specific amounts of an alkyl aryl sulphonate, or with nonionics of the alkyl aryl polyethylene glycol ether, alkyl polyethylene glycol ether or alkyl polyethylene glycol thioether types. The alkali-heat stability of such cleaners was good. Granular, free-flowing formulations were prepared, complying with the detergent and surface tension requirements of P-C-436a. It is recommended that the developed cleaners be subjected to a field test at an Ordnance Depot.
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