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US 3,947,511 AGranted
1-Hydrocarbyl-3-mono- and -dithiocarbamoylureas
AssigneeE. I. Du Pont de Nemours and Company
InventorMaynard S. Raasch
Life of this patent
Estimating the term…
Abstract
Novel 1-hydrocarbyl-3-(thiocarbamoylthio)ureas and 1-hydrocarbyl-3-(carbamoylthio)ureas are prepared by reacting, in liquid phase, an appropriate isocyanate and S-thiocarbamoylhydrosulfamine or S-carbamoylhydrosulfamine, e.g., S-(dimethylthiocarbamoyl)-N-methylhydrosulfamine or S-(dimethylcarbamoyl)hydrosulfamine. All the compounds are useful as rubber-curing agents.
Claims4
A compound of the formula ##EQU10## wherein:
- Z is S or O;
- R and R.sup.1, alike or different, are hydrogen, or a hydrocarbon radical of up to 8 carbon atoms selected from the group consisting of alkyl, cycloalkyl, alkenyl, aryl, alkaryl, and aralkyl;
- and R.sup.2 is a hydrocarbon radical of up to 8 carbon atoms selected from the group consisting of alkyl, cycloalkyl, alkenyl, aryl, alkaryl and aralkyl;
- or R.sup.1 and R.sup.2, taken together (R.sup.1 + R.sup.2), are (1) a chain of 4, 5 or 6 methylene groups which chain may be substituted with an alkyl group of 1 to 4 carbon atoms, or (2) --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 --;
- and
- X is a radical of up to 13 carbon atoms selected from the group consisting of alkylene, O- or S-interrupted alkylene, alkenylene, alkylenebis(arylene), arylenebis(alkylene), and arylene.
3 more elements
The compound named 1-ethyl-3-(dimethylthiocarbamoylthio)urea.
The compound named 1-methyl-3-(dimethylcarbamoylthio)urea.
Dependencies are inferred from the claim text.