Water-based microemulsions of a lower alkyl ester of quinoxalinyl herbicide

• US 6,187,715 B1
• Filed: 02/16/2000
• Issued: 02/13/2001
• Est. Priority Date: 02/16/2000
• Status: Expired due to Term

• Current Assignee: ISP Capital, Inc. (Ashland Global Holdings, Inc.)
• Original Assignee: ISP Investments, Inc. (Ashland Global Holdings, Inc.)
• Inventors: Narayanan, Kolazi S., Jon, Domingo I., Prettypaul, Donald I.
• Primary Examiner(s): Clardy, S. Mark
• Assistant Examiner(s): PRYOR, ALTON NATHANIEL
• Application Number:
  US09/505,306
• Time in Patent Office: 363 Days
• Field of Search: 504/118
• US Class Current: 504/118
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/02 containing liquids as carriers, diluents or solvents
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 43/60 1,4-Diazines; Hydrogenated 1,4-diazines

Abstract

Clear, high load water miscible emulsions of quinoxalinyl ester herbicides, particularly quizalofop-p-ethyl, as a single phase, translocatable composition which is free of xylene and alkylphenol ethoxylate surfactants and concentrate matrix for the active quinoxalinyl ester component at between about 9 and about 25 wt. % active concentration.

Claims

1. A concentrate of a liquid, water miscible matrix for an agrochemically active compound containing from about 9 to about 25 wt % of the agrochemical wherein the agrochemical is a quinoxalinyl ester selected from the group consisting of quizalofop-p-ethyl ester, quizalofop-p- tefuryl tetrahydrofurfuryl ester, and a C₁ to C₄ of a halogenated quinoxalinyl oxyphenoxy compound;

a mixture of one part of a heavy aromatic petroleum distillate boiling above 100 F and between 1 to 5 parts of a mixture comprising by weight (i) 0 to about 60 of a N-C₁ to C₄ alkyl lactam (ii) about 0.002 to 40% of a C₈ to C₁₈ alkyl lactam, (iii) 0 to about 30% of an ethyleneoxide/propyleneoxide block copolymer, (iv) about 0.03 to about 80% of an alkylated castor oil, tristyryl phenol ethoxylate or a mixture thereof and (v) 0 to about 10% of a phosphate ester buffer.

2. The concentrate of claim 1 containing between about by weight 0.15-40% (i), 0.05-29% (ii), 0.5-15% (iii), 40-70% (iv) and 0.005-6% (v).

3. A stable, homogeneous liquid composition comprising the concentrate of one of claims 1 or 2 and between about 0.05 to 25 wt. % of said agrochemically active compound based on total composition.

4. The composition of claim 1 wherein the quinoxalinyl ester is quizalofop-p-ethyl.

5. A stable, homogeneous liquid composition comprising the concentrate of one of claims 1 or 2 which is diluted with up to 99.9 wt. % of water and containing 0.01 to 5 wt. % of said active agrochemical compound based on total diluted concentrate composition.

6. The composition of one of claims 1 or 4 wherein said active agrochemical is a herbicide.

7. A concentrate according to claim 1 wherein the halogenated quinoxalinyl oxyphenoxy compound is selected from the group consisting of chloro quinoxalinyl oxyphenoxy propionate, 2,4-dichloro phenoxy ethyl butyrate, 1,4-dichloro phenoxy ethyl propionate, and 2,4-dichloro phenoxy butyl propionate.

8. A concentrate comprising a liquid, water soluble matrix containing from about 9 to about 25 wt. % of an agrochemically active compound selected from the group consisting of quizalofop-p-ethyl ester, quizalofop-p-tefuryl tetrahydrofurfuryl ester, a C₁ to C₄ ester of a halogenated quinoxalinyl oxyphenoxy compound and a matrix mixture of 0.2-9 parts of an aromatic petroleum distillate boiling above 100°

F. to 1 part of a mixture comprising (i) 0 to about 60% of a N—

C to C₄ alkyl lactam (ii) about 0.002 to 40% of a C₈ to C₁₈ alkyl lactam, (iii) 0 to about 30% of an ethyleneoxide/propyleneoxide block copolymer, (iv) 0.03 to about 80% of an alkylated castor oil, tristyryl phenol ethoxylate or a mixture thereof, and (v) 0 to about 10% and additionally containing 1-60 wt. % of one or more emulsifiers, based on said mixture.

9. A concentrate according to claim 8 wherein the halogenated quinoxalinyl oxyphenoxy compound is selected from the group consisting of chloro quinoxalinyl oxyphenoxy propionate, 2,4-dichloro phenoxy ethyl butyrate, 1,4-dichloro phenoxy ethyl propionate, and 2,4-dichloro phenoxy butyl propionate.