Herbicide compositions comprising imidazolinone acid, methods of preparation, and methods of use
AssigneePlatte Chemical Company
InventorsAnthony E. Herold, Scott K. Parrish, Richard A. Beardmore
Life of this patent
Estimating the term…
Abstract
Described are herbicide compositions (including suspension concentrates, herbicide compositions prepared therefrom), and others that include imidazolinone acid, which can optionally and preferably also include an acidifying agent, and methods of making and using such compositions.
Claims49
A herbicide composition comprising
- a suspension concentrate comprising an imidazolinone acid, and
- acidifying agent other than sulfuric acid in an amount so the pH of the composition is below the pKa of the imidazolinone acid.
A herbicide composition comprising
- imidazolinone acid, and
- acidifying agent other than sulfuric acid in an amount so the pH of the composition is below the pKa of the imidazolinone acid.
A suspension concentrate comprising imidazolinone acid and a short chain alcohol ethoxylate nonionic surfactant having a short chain branched or linear alkyl having from 3 to 23 or fewer carbon atoms.
A suspension concentrate comprising an imidazolinone acid and anionic surfactant.
A suspension concentrate comprising imidazolinone acid and surfactant, comprising from greater than 30 parts by weight imidazolinone acid to about 50 parts by weight imidazolinone acid, per 1 part by weight surfactant.
A herbicide composition comprising:
- aqueous suspension concentrate comprising
- about 25 to about 45 weight percent imidazolinone acid, and
- about 0.5 to about 1.5 weight percent surfactant selected from the group consisting of:
- short chain alcohol ethoxylate nonionic surfactant, anionic surfactant, cationic surfactant, and mixtures thereof, and
- about 40 to about 60 parts by weight water;
- and
- acidifying agent selected from the group consisting of sulfuric acid, hydrochloric acid, nitric acid, acetic acid, phosphoric acid, perchloric acid, polyphosphoric acid, an adduct of sulfuric acid and urea, and combinations thereof, in an amount so the pH of the composition is below the pKa of the imidazolinone acid.
A herbicide composition comprising:
- aqueous suspension concentrate comprising
- about 25 to about 45 weight percent imidazolinone acid, and
- about 0.5 to about 1.5 weight percent surfactant selected from the group consisting of:
- nonionic surfactant, anionic surfactant, cationic surfactant, and mixtures thereof, and
- about 40 to about 60 parts by weight water;
- and
- acidifying agent selected from the group consisting of hydrochloric acid, nitric acid, acetic acid, phosphoric acid, perchloric acid, and polyphosphoric acid, an adduct of sulfuric acid and urea, and combinations thereof, in an amount so the pH of the composition is below the pKa of the imidazolinone acid.
A method of killing or controlling unwanted vegetation growth, the method comprising
- preparing a herbicide composition comprising an imidazolinone acid and an amount of acidifying agent other than sulfuric acid to reduce the pH of the herbicide composition to a pH below the pKa of the imidazolinone acid, and
- applying the herbicide composition to control plant growth.
A method of killing or controlling unwanted vegetation growth, the method comprising
- preparing a herbicide composition comprising a suspension concentrate comprising an imidazolinone acid and surfactant selected from the group consisting of short chain alcohol ethoxylate nonionic surfactant, anionic surfactant, cationic surfactant, and mixtures thereof, and
- applying the herbicide composition to control plant growth.
A method of preparing a herbicide composition comprising imidazolinone acid, the method comprising
- combining imidazolinone acid particles with water and surfactant,
- mixing or agitating the water, imidazolinone acid particles, and surfactant,
- wet milling water, imidazolinone acid particles, and surfactant to produce a suspension concentrate, and
- combining the suspension concentrate with acidifying agent in an amount to produce a herbicide composition having a pH below the pKa of the imidazolinone acid.
A method of preparing a suspension concentrate, the method comprising
- combining imidazolinone particles with surfactant and water, the surfactant comprising a surfactant selected from the group consisting of:
- a short chain alcohol ethoxylate nonionic surfactant, anionic surfactant, cationic surfactant, and mixtures thereof,
- mixing the water, imidazolinone particles, and surfactant, and
- wet milling the mixture to produce a suspension concentrate.
Dependencies are inferred from the claim text.