Process for the production of 4- or 5-methyl-2-mercaptobenzimida

Details Process for the production of 4- or 5-methyl-2-mercaptobenzimida Process for the production of 4- or 5-methyl-2-mercaptobenzimida

1981-02-25

1982-05-11

Fan, Jane T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D48700

Patent

active

043294774

ABSTRACT:
A process for the production of 4- or 5-methyl-2-mercaptobenzimidazole, characterized in that 1 part of 4- or 5-methyl benzimidazolone is reacted with 3 to 10 parts by weight of carbon disulphide in the presence of 1% to 12% by weight of a basic catalyst, based on benzimidazolone, at a temperature in the range from 200.degree. C. to 300.degree. C. 4- or 5-methyl-2-mercaptobenzimidazole is used in the rubber industry as an anti-ager for both natural and synthetic rubber either on its own or in combination with other standard anti-agers.

REFERENCES:
patent: 3895025 (1975-07-01), Goodman
patent: 4172833 (1979-10-01), Whitney et al.

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