20707-94-2

Upstream product

• 41345-74-8 methoxycarbonylethylsulfenyl chloride 
• 15441-06-2 dimethyl 3,3'-dithiodipropionate 
• 10025-67-9 disulfur dichloride 
• 2935-90-2 Methyl 3-mercaptopropionate 
• 292638-85-8 acrylic acid methyl ester 

Downstream Products

• 4131-74-2 Dimethyl 3,3'-thiodipropionate 

Relevant academic research and scientific papers

Organopolysulfide mixture, the process for manufacturing the same, and in the use of a rubber mixture organopolysulfide mixture

Polysulfide compounds (I) are new. Polysulfide compounds of formula (I) are new. R : methyl (preferred), ethyl, n-propyl, 2-propyl, n-butyl, isobutyl, tert-butyl, 5C alkyl, 6C alkyl, 7C alkyl or C8 alkyl; and n : 2-6, where the amount of (I) is at least 80%, preferably 95-99%, when n is 4. Independent claims are included for: (1) preparation of (I); (2) a rubber composition comprising at least one rubber and (I); (3) producing vulcanizates comprising vulcanizing the rubber mixture at a melt temperature of 100-200[deg] C, preferably 130-180[deg] C; (4) an additive composition comprising the sulfur-containing alkoxysilane, preferably bis-(triethoxysilylpropyl)tetrasulfane, bis-(triethoxysilylpropyl)disulfane, 3-(triethoxysilyl)-1-propanethiol, polyether functionalized mercaptosilane or thioester functionalized alkoxysilane and (I); and (5) reducing the rolling resistance of tires, comprising adding a non-or partially cross linked rubber mixture, which is used as a starting material for at least portions of the tire to (I) and then vulcanizing the rubber mixture. [Image].

A SUCCESSIVE PREPARATION METHOD OF 3-ISOTHIAZOLONE DERIVATES AND THEIR INTERMEDIATES

The present application provides a process for continuously producing 3-isothiazolinone derivatives and intermediate products thereof, comprising continuously carrying out four steps, i.e., sulfuration, purification, amination and chlorination. Compared with the batch process of the prior art, the process of the present application may reduce the amount of manufacturing devices, lower energy consumption, simplify operations, and is therefore particularly suitable for mass production.

Rhodium-catalyzed sulfur atom exchange reaction between organic polysulfides and sulfur

RhH(PPh3)4 and cis-1,2-bis(diphenylphosphino)ethylene (dppv) catalyze the exchange of sulfur atoms between sulfur and organic polysulfides. The exchange of dialkyl trisulfides with sulfur proceeds at a high efficiency within 5 min at room temperature yielding a mixture of organic polysulfides.