Process for the preparation of organic disulphides and polysulph

Details Process for the preparation of organic disulphides and polysulph Process for the preparation of organic disulphides and polysulph

1996-12-11

1998-06-16

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From sulfur-containing reactant

568 21, 568 26, C08G 7504

Patent

active

057672296

ABSTRACT:
In a process for the preparation of organic disulphides and polysulphides by reaction of sulphur with a mercaptan or with a polysulphide of lower sulphur order in order to convert it into polysulphide of higher order, or alternatively by reaction of a mercaptan with an organic polysulphide of a high sulphur order in order to convert it into a polysulphide of lower sulphur order, in the presence of a catalyst in the form of a resin with a basic function, the resin is based on a polystyrene-divinyl benzene support functionalized with guanidine or amidine groups, and the reaction is preferably conducted in the presence of methanol.

REFERENCES:
patent: 3308166 (1967-03-01), Biensan et al.
patent: 3856715 (1974-12-01), Corte et al.
patent: 4623711 (1986-11-01), Morris et al.
patent: 5028259 (1991-07-01), Lin et al.
patent: 5068445 (1991-11-01), Arretz
. . . ", Macromol. Chem., 185:2117-2124, 1984.
Iijima et al., "Polymer-Supported Bases.XI.Esterification and Alkylation in the . . . ", J.M.S.-Pure Appl. Chem., A29(3):249-261, 1992.
Chemical Absracts, vol. 104, No. 12, Abstract No. 90051k, 24 Mar. 1986.

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