| abstract |
The invention relates to granular, coated N-alkylammonium acetonitrile salts of general formula (I) R?2R3N R1-CR4R5-CN+Y-¿, wherein R1 means a C¿1?- to C24-alkyl group which can be interrupted by non-adjacent oxygen atoms or can additionally carry hydroxyl groups, a C4- to C24-cycloalkyl group, a C7- to C24 alkaryl group or a grouping of formula -CR?4R5-CN; R2 and R3¿ each have, independently of each other, the meaning of R1 or together represent, in the nitrogen atom to which they are bonded, a saturated four to nine-membered ring with at least one C-atom and at least one other hetero atom from the following group: oxygen, sulphur and nitrogen; R?4 and R5¿ each mean, independently of each other, hydrogen, a C¿1?- to C24 alkyl group which can be interrupted by non-adjacent oxygen atoms or can additionally carry hydroxyl groups, a C4- to C24-cycloalkyl group or a C7- to C24-alkaryl group; and Y represents a sulphate or hydrogen sulphate anion in the appropriate stoichiometric quantity; which are coated with a material selected from the following group: organic, inorganic, hydrophilic and hydrophobic substances. |