SYMPOSIA PAPER Published: 01 January 1993

Physical Properties of Silicone Surfactants for Agrochemical Applications


Aqueous solutions of four silicone surfactants, and two hydrocarbon surfactants were studied over a range of concentrations for dynamic surface tension lowering, spreading on paraffin wax film, and static surface tension. Dynamic surface tension profiles were obtained by both the oscillating jet method and the maximum bubble pressure method. It was found that aqueous solutions of the silicone surfactants lower surface tension more quickly, spread better on paraffin wax film, and yielded lower static surface tension values than corresponding aqueous solutions of the hydrocarbon surfactants. Implications of the findings as regards effectiveness of these adjuvants are discussed.

Author Information

Murphy, DS
Union Carbide Corporation, Tarrytown, NY
Policello, GA
Union Carbide Corporation, Tarrytown, NY
Goddard, ED
Union Carbide Corporation, Tarrytown, NY
Stevens, PJG
Forest Research Institute, Rotorua, New Zealand
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Developed by Committee: E35
Pages: 45–56
DOI: 10.1520/STP20182S
ISBN-EB: 978-0-8031-5221-2
ISBN-13: 978-0-8031-1439-5