Preparation of substantially dust-free tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione granules

Preparation of substantially dust-free tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione granules

CN
  • CN 1,034,076 C
  • Filed: 12/21/1992
  • Issued: 02/19/1997
  • Est. Priority Date: 12/21/1991
  • Status: Active Grant
First Claim
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1. one kind prepares tetrahydrochysene-3 shown in the non-dusting substantially following formula (I), 5-dimethyl 1,3, and the method for 5-thiadiazine-2-thione granules, Wherein react with formaldehyde (IV) with methylamine (II) and dithiocarbonic anhydride (III) and formaldehyde (IV) reaction or with the methyl ammonium salt (V) of N-methyl dithiocarbamic acid, described being reflected at compound (II) serves as that the basis counts that Alkylenediamine carries out under existing shown at least a following formula (VI) of 0.1-10 mole % R 1-NH-A-NH-R 2(VI) R in the formula 1And R 2Represent hydrogen or C independently of each other 1-C 4Alkyl, A are ethylene, trimethylene or tetramethylene bridge, and also these bridges can have 1-4 C 1-C 4Alkyl.

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