15667-54-6Relevant academic research and scientific papers
Amidolysis of polyurethane wastes
Sadykova,Spiridonova,Bakirova,Kochnev
, p. 1907 - 1910 (2009)
Chemical degradation of various grades of polyurethane under the action of ε-caprolactam was performed. The degradation rate depends on the polyurethane structure. Amidolysis of the urethane group was proved by performing model reactions.
Reactions of N- or N'-Blocked N-acylureas with Amines
Schweim, Harald G.
, p. 430 - 437 (2007/10/02)
In order to make reactions of N-acylureas with amines more selective N- or N'-blocked derivatives were prepared.Their fragmentation was examined.
Preparation of substituted ureas
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, (2008/06/13)
A process for preparing a substituted urea of the formula EQU1 wherein R1 taken separately is alkyl having 1 to 8 carbon atoms, alkenyl having 3 to 8 carbon atoms, cycloalkyl having 5 to 6 carbon atoms or aryl having 6 to 12 carbon atoms; R2 taken separately is hydrogen, alkyl having 1 to 18 carbon atoms, alkenyl having 2 to 18 carbon atoms, aralkyl having 7 to 14 carbon atoms or aryl having 6 to 12 carbon atoms or R1 and R2 taken together form a polymethylene bridge having 2 to 10 carbon atoms; R is a tetravalent alkane radical having 1 to 6 carbon atoms, a tetravalent alkene radical having 3 to 8 carbon atoms, a tetravalent cycloalkane radical having 5 to 6 carbon atoms, a tetravalent aralkane radical having 7 to 14 carbon atoms or a tetravalent aryl radical having 6 to 12 carbon atoms and X1, X2 and X3 are each hydrogen or EQU2 said process comprising the steps of reacting an N-(1-chloro-1-alkenyl)-carbamic acid chloride of the formula EQU3 with an amine of the formula EQU4 wherein Y1, Y2 and Y3 are each hydrogen or amino in the presence of an alkali metal hydroxide at a temperature of from 5° to 60°C. and in a molar ratio of n mols of said carbamic acid chloride reactant and n mols of said alkali metal hydroxide per mol of said amine reactant, n being a number equal to the number of the amino substituents on said amine reactant, and then hydrolyzing the resulting intermediate at a temperature of from 20° to 100°C. to obtain said substituted urea of said formula, and its utility as masked isocyanate in the preparation of lacquers and coating materials.
