Alkylcarboxylic acid dimethylamides as crystallization inhibitors
AssigneeBayer Aktiengesellschaft
InventorsHeinz-Otto Horstmann, Uwe Priesnitz, Ulrich Engelhardt, Karl Reizlein, Klaus Wangermann
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Abstract
Crystallization of active material in spraying an aqueous solution of one of ##STR1## and is prevented by incorporation therein of an alkylcarboxylic acid dimethylamide of the formula ##STR2## in which R represents alkyl having 5 to 19 carbon atoms.
Claims10
A composition comprising an alkylcarboxylic acid dimethylamide of the formula ##STR39## in which R represents alkyl having 5 to 11 carbon atoms, and A) at least one compound selected from the group consisting of ##STR40## in which a) R.sup.1 represents ##STR41## R.sup.2 represents tert.-butyl and R.sup.3 represents hydroxyl, or
- b) R.sup.1 represents 4-fluorophenyl,
- R.sup.2 represents 2-fluorophenyl and
- R.sup.3 represents hydroxyl, or
- c) R.sup.1 represents 2,4-dichlorophenyl,
- R.sup.2 represents n-butyl and
- R.sup.3 represents hydroxyl, or
- d) R.sup.1 represents ##STR42## R.sup.2 represents phenyl and R.sup.3 represents cyano, or
- e) R.sup.1 represents 2-chloro-benzyl,
- R.sup.2 represents 1-chloro-cycloprop-1-yl and
- R.sup.3 represents hydroxyl, or
- f) R.sup.1 represents 4-chlorophenyl,
- R.sup.2 represents ##STR43## R.sup.3 represents hydroxyl, or g) Y represents --CH(OH) and
- R.sup.4 represents chlorine or phenyl, or
- h) Y represents CO and
- R.sup.4 represents chlorine, and
- i) R.sup.5 represents hydrogen or chlorine,
- and optionally at least one member selected from the group consisting of a surface-active agent, organic diluent, water, low temperature stabilizer and adhesive, and wherein the weight ratio of active compound from the group (A) to alkylcarboxylic acid dimethylamide of the formula (I) is from about 1:0.2 to 1:5.
In the spraying of an aqueous solution of an active compound selected from the group consisting of ##STR49## wherein a) R.sup.1 represents ##STR50## R.sup.2 represents tert.-butyl and R.sup.3 represents hydroxyl, or
- b) R.sup.1 represents 4-fluorophenyl,
- R.sup.2 represents 2-fluorophenyl and
- R.sup.3 represents hydroxyl, or
- c) R.sup.1 represents 2,4-dichlorophenyl,
- R.sup.2 represents n-butyl and
- R.sup.3 represents hydroxyl, or
- d) R.sup.1 represents ##STR51## R.sup.2 represents phenyl and R.sup.3 represents cyano, or
- e) R.sup.1 represents 2-chloro-benzyl,
- R.sup.2 represents 1-chloro-cycloprop-1-yl and
- R.sup.3 represents hydroxyl, or
- f) R.sup.1 represents 4-chlorophenyl,
- R.sup.2 represents ##STR52## R.sup.3 represents hydroxyl, or g) Y represents --CH(OH) and
- R.sup.4 represents chlorine or phenyl, or
- h) Y represents CO and
- R.sup.4 represents chlorine, or
- i) R.sup.5 represents hydrogen or chlorine
- the improvement which comprises preventing crystallization of such active compound by including in the solution an alkylcarboxylic acid dimethylamide of the formula ##STR53## in which R represents alkyl having 5 to 19 carbon atoms, wherein the concentration of said active compound in said aqueous solution is from about 0.0001 to about 3 percent by weight and the weight ratio of said active compound to said alkylcarboxylic acid dimethylamide is from about 1:023 to about 1:5.
Dependencies are inferred from the claim text.