Antifoaming agents
AssigneeShell Research Limited
InventorsPeter Colson, Holger Weil
Life of this patent
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Abstract
Paraffinic oils which comprise in the range of from 45% to 100% basis mass per mass of one or more paraffinic hydrocarbon(s) and have an average molecular weight in the range of from 100-200 are useful as antifoam agents, especially in a surfactant-containing concentrate or an adjuvant concentrate for crop protection use.
Claims11
An aqueous crop protection formulation comprising a crop protection agent, an alcohol alkoxylate and an effective antifoaming amount of a paraffinic oil, wherein the paraffinic oil must have a flash point of less than 100° C. and a density at 15° C. as measured according to ASTM D 1298 of from about 0.70 kg/l to about 0.85 kg/l.
A method of removing or preventing foam caused by the dilution in water or an aqueous medium of a crop protection concentrate formulation containing an alcohol alkoxylate which comprises adding an effective antifoaming amount of a paraffinic oil to the water or the aqueous medium, wherein the paraffinic oil must have a flash point of less than 100° C. and a density at 15° C. as measured according to ASTM D 1298 of from about 0.70 kg/l to about 0.85 kg/l.
Dependencies are inferred from the claim text.