| 摘要 |
Described is a method of producing tetrahydro-3,5-dimethyl-1,3,5-thiadiazin- 2- thion powder (I) substantially free of dust fines by reacting methylamine (II) with carbon disulphide (III) and formaldehyde (IV) or by reacting the methylammonium salt of N-methyldithiocarbamic acid (V) with formaldehyde (IV), characterized in that the reaction is carried out in the presence of at least one diaminoalkylene of the formula (VI): R1-NH-A-NH-R2, in which R2 an d R2, independently of each other, are hy- drogen or an alkyl group and A is an optionally substituted 1,2-ethylene, 1, 3- propylene or 1,4-butylene bridge.
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