- PROCESS FOR STRAIGHTENING KERATIN FIBRES WITH A HEATING MEANS AND DENATURING AGENTS
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The invention relates to a process for straightening keratin fibres, comprising: (i) a step in which a straightening composition containing at least two denaturing agents is applied to the keratin fibres, (ii) a step in which the temperature of the keratin fibres is raised, using a heating means, to a temperature of between 110 and 250° C.
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- N-alkylated carboxylic acid derivatives as anti-convulsant agents
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Described are compounds of the formula STR1 wherein R is hydrogen or loweralkyl; R1 is --OR2 or --NR2 R3 wherein R2 and R3 independently of one another denote hydrogen or loweralkyl; n is 0 or 1; R4 and R5 independently of one another denote loweralkyl or together form a 5 or 6 membered cycloalkyl substituted by hydrogen or loweralkyl, and together with the nitrogen atom, form a ring; and pharmaceutically acceptable salts thereof and their use as anticonvulsant agents in a method of controlling convulsions or seizures.
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- Process for the preparation of alkyl-ureas
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The instant invention is directed to a process for the preparation of an alkyl-substituted urea of the formula STR1 wherein R and R', which may be the same or different, represents hydrogen or a saturated hydrocarbon radical, provided that at least one represents a saturated aliphatic hydrocarbon radical, comprising reacting, unpressurized, at from 110° to 170° C., urea with an amine having a boiling point, under normal pressure, at least 10° C. below the reaction temperature, said amine corresponding to the formula: STR2 wherein R and R' are as defined above, and wherein for each mol of urea present, at least one mol of amine is used, the improvement wherein the reaction is carried out in the presence of from 20 to 95% by weight, based on the total quantity of reactants and auxiliary agents, if any, of an organic liquid boiling, under normal pressure, above the reaction temperature, which is inert under the reaction conditions and which serves as a dispersing agent or a solvent for the urea and for the product of the process and is a solvent for the amine.
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