Abstract
The foaming properties of mixtures of PEG-nonylphenylethers (p=6, 9, 12, 20) and saturated fatty acid sodium salts (C12, C14, C16) have been investigated.
The combination ratios of nonylphenylethers and soaps, having the foaming power equal or superior to soaps, are limited between a narrow range. The foaming power decreases as the amount of nonylphenylether increases. The range of the above combination ratios becomes wider as the EO mol number of nonylphenylether increases and as the alkyl chain length of fatty acid soap increases. Soap A nonylphenylether=30 : 7010 : 90 have minimum foaming power.
