Patent ID: 6020529
Filing Date: 2000-02-01
Classification: C07C

Abstract:
Process comprising preparing organic disulphides and polysulphides R--S.sub.n --R (with n.gtoreq.2) by reacting sulphur with a mercaptan R-SH or with a polysulphide of lower sulphur order to convert it into polysulphide of higher order, or by reacting of a mercaptan with an organic polysulphide of high sulphur order to convert it into polysulphide of lower sulphur order, in the presence of a catalyst in the form of a resin with basic functions, the resin being based on polystyrene-divinylbenzene (PS-DBV) functionalized with ethylenediamine or polyethylenepolyamine groups, this resin having formula (I): ##STR3## in which: ##STR4## represents the PS-DVB resin support, the symbols R.sup.1, R.sup.2 R.sup.3 and R.sup.4, which are identical or different, each represent a hydrogen atom or an alkyl, cycloalkyl, aryl or arylalkyl radical,n is an integer ranging from 1 to 6,m does not exceed n and is equal to 0 or is an integer which can be up to 5.