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Problems solved by technology
A drawback of ethoxylated tertiary alkylamine surfactants of prior art is that when included in concentrate formulations at levels consistent with good herbicidal performance, they tend to be irritant to eyes.
A further drawback of ethoxylated tertiary al
Method used
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Examples
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example 1
The surfactant used in Example 1 is a tertiary etheramine having the chemical structure represented above in which R.sub.1 is C.sub.12 -C.sub.14 alkyl, m is 3, x+y is 5 and R.sub.2 and R.sub.3 are each ethylene.
The aqueous concentrate composition of Example 1 was prepared by mixing the following ingredients in the order given: (1) aqueous solution of glyphosate isopropylamine salt containing 46% glyphosate a.e., 67.4 g. (2) surfactant as defined above, 10.0 g. (3) deionized water, 22.6 g.
The composition can be calculated to contain 31% glyphosate a.e. and 10% surfactant. Specific gravity of the composition at 20 / 15.6.degree. C. was determined to be 1.1628. Cloud point of the composition was >90.degree. C.
example 2
The surfactant used in Example 2 is the same as that used in Example 1. The aqueous concentrate composition of Example 2 was prepared by mixing the following ingredients in the order given: (1) aqueous solution of glyphosate isopropylamine salt containing 46% glyphosate a.e., 1348 g. (2) surfactant as defined above, 110 g. (3) deionized water, 542 g.
The composition can be calculated to contain 31% glyphosate a.e. and 5.5% surfactant. Specific gravity of the composition at 20 / 15.6.degree. C. was determined to be 1.1630. Cloud point of the composition was >90.degree. C.
The composition of Example 2 was submitted for eye irritation testing according to the standard procedure prescribed in US Environmental Protection Agency (EPA) Publication 540 / 9-82-025, November 1982, entitled Pesticidal Assessment Guidelines, Subdivision F. Hazard Evaluation: Human and Domestic Animals. The study was conducted in compliance with EPA Good Laboratory Practice (GLP) standards. Results were obtained placi...
example 3
The surfactant used in Example 3 is a tertiary etheramine having the chemical structure represented above in which R.sub.1 is C.sub.12 -C.sub.14 alkyl, m is 2, x+y is 5, R.sub.2 is isopropylene and R.sub.3 is ethylene.
The aqueous concentrate composition of Example 3 was prepared by mixing the following ingredients in the order given: (1) aqueous solution of glyphosate isopropylamine salt containing 46% glyphosate a.e., 1348 g. (2) surfactant as defined above, 200 g. (3) deionized water, 452 g.
The composition can be calculated to contain 31% glyphosate a.e. and 10% surfactant. Specific gravity of the composition at 20 / 15.6.degree. C. was determined to be 1.1618. Cloud point of the composition was >90.degree. C.
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Abstract
Herbicidal compositions are provided comprising glyphosate or a salt thereof and an etheramine surfactant having the representative chemical structure (a)wherein R1 is a straight or branched chain C6 to about C22 alkyl, aryl or alkylaryl group, m is an average number from 1 to about 10, R2 in each of the m (O-R2) groups is independently C1-C4 alkylene, R3 groups are independently C1-C4 alkylene, and x and y are average numbers such that x+y is in the range from 2 to about 60; or (b)wherein R1 is a straight or branched chain C6 to about C22 alkyl, aryl or alkylaryl group, m is an average number from 1 to about 10, R2 in each of the m (O-R2) groups is independently C1-C4 alkylene, R3 groups are independently C1-C4 alkylene, R4 is C1-C4 alkyl, x and y are average numbers such that x+y is in the range from 0 to about 60, and A- is an agriculturally acceptable anion; or (c)wherein R1 is a straight or branched chain C6 to about C22 alkyl, aryl or alkylaryl group, m is an average number from 1 to about 10, R2 is each of the m (O-R2) groups is independently C1-C4 alkylene, R3 groups are independently C1-C4 alkylene, and x and y are average numbers such that x+y is in the range from 2 to about 60.
Description
FIELD OF THE INVENTIONNovel agriculturally acceptable formulations of the herbicide N-phosphonomethylglycine (glyphosate) comprising tertiary or quaternary etheramine or etheramine oxide surfactants are provided.BACKGROUND OF THE INVENTIONGlyphosate is well known as a highly effective and commercially important herbicide useful for combating the presence of a wide variety of unwanted vegetation, including a agricultural weeds. Glyphosate is conventionally applied as a formulated product dissolved in water to the foliage of annual and perennial grasses and broad leaf plants and the like, is taken up over a period of time into the leaves, and thereafter translocates throughout the plant.Usually, glyphosate is formulated in commercial compositions in the form of a water-soluble salt. Salts in commercial use include the ammonium salt, alkylamine salts, such as the isopropylamine salt, alkali metal salts, such as the sodium salt, and the trimethylsulfonium salt. However, formulations of ...
Claims
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