Glyphosate formulations containing amidoalkylamine surfactants

An aqueous herbicidal concentrate composition comprising:

• (a) glyphosate or a derivative thereof;
• (b) an amidoalkylamine surfactant of formula (1):
• wherein R1 is alkyl or alkenyl having an average of from about 4 carbon atoms to about 22 carbon atoms, R2 and R3 are independently alkyl having from 1 to 4 carbon atoms, and R4 is alkylene having from 1 to 4 carbon atoms;
• and
• (c) a co-surfactant component comprising at least one co-surfactant selected from the group consisting of:
• an alkoxylated tertiary amine oxide of formula (2):
• wherein
• R21 is a straight or branched chain hydrocarbyl having an average of from about 5 carbon atoms to about 22 carbon atoms;
• R25 is C1-4 alkylene;
• R26 is a C1-4 alkylene different from R25;
• and
• x, y, p, and q are each independently average numbers greater than or equal to 1, such that the sum of x, y, p, and q is from 5 to about 20 and the sum of x and y is from about 3 to about 12;
• a co-surfactant comprising a betaine of formula (4a):
• wherein
• R41 is a straight or branched chain hydrocarbyl having an average of from about 5 carbon atoms to about 22 carbon atoms;
• each R43 is independently selected from C1-4 alkylene;
• and
• x and y are average numbers such that the sum of x and y is from about 2 to about 20;
• a co-surfactant of formula (5b):
• wherein
• R51 is a substituted hydrocarbyl having an average of from about 5 carbon atoms to about 22 carbon atoms derived from a triglyceride, fatty acid, or methylester of a fatty acid and comprising at least one pendant hydroxyl or alkoxy group on the hydrocarbon chain;
• R52 is C1-4 alkylene;
• R53 and R54 are each independently selected from C1-4 alkyl and (R56—O)mR57, wherein R56 in each of the (R56—O) groups is independently selected from C1-4 alkylene, each R57 is independently selected from hydrogen and C1-4 alkyl, and each m is an average number such that the sum of every m is from 1 to about 30;
• and
• R55 is selected from CH2CO2− and oxygen;
• and
• a co-surfactant of formula (5c):
• wherein
• R51 is a substituted hydrocarbyl having an average of from about 5 carbon atoms to about 22 carbon atoms derived from a triglyceride, fatty acid, or methylester of a fatty acid and comprising at least one pendant hydroxyl or alkoxy group on the hydrocarbon chain;
• R52 is C1-4 alkylene;
• and
• R53 and R54 are each independently selected from Ci-4 alkyl and (R56—O)mR57, wherein R56 in each of the (R56—O) groups is independently selected from C1-4 alkylene, each R57 is independently selected from hydrogen and C1-4 alkyl, and each m is an average number such that the sum of every m is from 1 to about 30.