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US 4,396,415 AGranted
Herbicide
AssigneeBASF SE
InventorsGotthard Synnatschke, Walter Gueckel
Life of this patent
Estimating the term…
Abstract
Herbicide based on 1-phenyl-4-amino-5-chloro (or 5-bromo-)-pyridazone-(6) in the form of an aqueous suspension containing from 20 to 50 wt % of active ingredient, and silica and a block copolymer of propylene glycol, propylene oxide and ethylene oxide.
Claims6
A herbicidal composition in the form of an aqueous suspension, comprising:
- from 20 to 50% of 1-phenyl-4-amino-5-chloropyridazone-(6) or 1-phenyl-4-amino-5-bromopyridazone-(6) as active ingredient,
- from 2 to 10 wt% of dispersant consisting essentially of condensate product of a phenolsulfonic acid, urea and formaldehyde and water, and
- from 0.5 to 5%, respectively, of (a) silica and (b) a block copolymer of propylene glycol, propylene oxide and ethylene oxide, wherein said block copolymer is formed by reacting propylene glycol with propylene oxide to form a propylene oxide backbone and then reacting said propylene oxide backbone with ethylene oxide such that the molecular weight of the resulting block copolymer is about 6,000 to 7,000.
A herbicidal composition in the form of an aqueous suspension, consisting essentially of:
- from 20 to 50% of 1-phenyl-4-amino-5-chloropyridazone-(6) or 1-phenyl-4-amino-5-bromopyridazone-(6) as active ingredient,
- from 2 to 10 wt% of dispersant consisting of the sodium salt of a condensate product of phenolsulfonic acid, urea and formaldehyde, and water, and
- from 0.5 to 5%, respectively, of (a) silica and (b) a block copolymer of propylene glycol, propylene oxide and ethylene oxide, wherein said block copolymer is formed by reacting propylene glycol with propylene oxide to form a propylene oxide backbone and then reacting said propylene oxide backbone with ethylene oxide such that the block copolymer has a polypropylene oxide backbone of molecular weight 3,000 to 3,500 and contains about 50% by ethylene oxide units.
Dependencies are inferred from the claim text.