Abstract:
A PROCESS FOR THE VULCANIZATION OF TERPOLYMERS OF ETHYLENE AND PROPYLENE, ALSO KNOWN AS EPDM RUBBERS, IS DESCRIBED. MORE PARTICULARLY VULCANIZATION ACCELERATORS FOR SUCH A PROCESS HAVING THE FORMULA
(R-O)2-P(=S)-S-CO-S-P(=S)(-O-R)2
IN WHICH THE RADICALS R REPRESENT THE SAME OR DIFFERENT STRAIGHT CHAINED OR BRANCHED LOWER ALKYL RADICALS, EACH OF WHICH MAY BE SUBSTITUTED BY A LOWER ALKOXY GROUP, ARE DESCRIBED.
Abstract:
THIS INVENTION RELATES TO NEW SULPHENAMIDES OF 2FORMYL PROPYL-2-SULPHENIC ACID AND THEIR USE IN THE PRODUCTION AND PROCESSING OF MIXTURES BASED ON A NATURAL OR SYNTHETIC RUBBER. THE NOVEL COMPOUNDS ARE PREPARED BY REACTING 2-FORMYL PROPYL-2-SULPHENIC CHLORIDE WITH AMINES AND AMIDES IN THE PRESENCE OF AN ACID BINDING AGENT. THE RETARDERS CAN BE MIXED INTO THE RUBBER IN THE USUAL WAY.
Abstract:
N,N''-THIO-BIS-CARBAMIC ACID AMIDES, THEIR PREPARATION BY REACTING AT LEAST 2 MOLS OF A CARBOXYLIC ACID AMIDE WITH 1 MOL OF SULPHUR DICHLORIDE IN THE PRESENCE OF AN ACID BINDING AGENT AND THEIR UTILITY AS RUBBER VULCANIZATION RETARDERS.
Abstract:
THIS INVENTION RELATES TO NEW SULPHENAMIDES OF 2-FORMYL PROPYL-2-SULPHENIC ACID AND TO THEIR USE IN THE PRODUCTION AND PROCESSING OF MIXTURES BASED ON A NATURAL OR SYNTHETIC RUBBER. THE NOVEL COMPOUNDS ARE PREPARED BY REACTING 2-FORMYL PROPYL-2-SULPHENIC CHLORIDE WITH AMINES AND AMIDES IN THE PRESENCE OF AN ACID BINDING AGENT. THE RETARDERS CAN BE MIXED INTO THE RUBBER IN THE USUAL WAY.
Abstract:
A process for the preparation of a substituted vinyl-cyclopropanecarboxylic acid ester of the formula in which R1 and R2 each independently is alkyl with 1-4 carbon atoms or halogen, R3 is halogen, phenoxy or phenoxy substituted by alkyl with 1-4 carbon atoms or by halogen, R4 is halogen or methyl, and n is 0, 1, 2, 3 or 4, comprising saponifying with alkali an ester of the formula in which R5 is alkyl with 1-4 carbon atoms, thereby to replace R5 by an alkaline salt group, and directly reacting such salt without intermediate purification with a benzyl chloride of the formula Advantageously the benzyl chloride is obtained by the gas-phase photochlorination of a compound of the formula (IV), the chlorination proceeding to about 25 to 75%, and the chlorination mass being employed directly without isolation.
Abstract:
Sulphenamides are obtained by reacting N-chlorothiophthalimide with compounds containing one or two olefinic double bonds. These products retard vulcanization of natural or synthetic rubber.