| 摘要 |
<p>Inhibiting premature vulcanisation of diene rubbers with bis-thioimides. New cpds. with a nucleus of: where the free valence on the nitrogen is linked to a second carbonyl and R is alkyl, aryl or cycloalkyl, are inhibitors of premature vulcanisation of diene rubbers. The R may be substd. to give a bis-sulphenimide of the formula: R1-S-R-S-R1 where R is an alkane, arylene or cycloalkane and R1 is an imide. A combination of a vulcanisation accelerator and an inhibitor of this invention is an improved rubber additive which allows longer and safer processing time for rubber.</p> |
