Reference

Vulcanization inhibiting compounds

Vulcanization inhibiting compounds. Arnold, Robert J.; Gattuso, Marion J. (UOP Inc., USA). U.S. US 4022828 10 May 1977, 6 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07C143-74. NCL: 260545000R. APPLICATION: US 74-454628 25 Mar 1974. DOCUMENT TYPE: Patent CA Section: 38 (Elastomers, Including Natural Rubber) Bis(sulfonamido)sulfides or polysulfides are antiscorch agents for SBR rubbers. Thus, SBR contg. conventional vulcanization additives and 0.50 phr bis(N-methyl-p-toluenesulfonamino)sulfide (I) [63295-09-0], prepd. by the reaction of N-methyl-p-toluenesulfonamide [640-61-9] with SCl2, had 1 point rise 10.5 min and 10 point rise 11.8 min, compared with 5.6 and 6.8, resp., for vulcanization in the absence of I.

Vulcanizable rubber formulations with bis(sulfonamido)sulfide

Vulcanizable rubber formulations with bis(sulfonamido)sulfide. Arnold, Robert J.; Gattuso, Marion J. (UOP Inc., USA). U.S. US 4053458 11 Oct 1977, 6 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08F019-20. NCL: 260079500A. APPLICATION: US 74-454628 25 Mar 1974. DOCUMENT TYPE: Patent CA Section: 38 (Elastomers, Including Natural Rubber) Section cross-reference(s): 23 Bis(sulfonamido) sulfides are prepd. and used as scorch inhibitors for rubber. Thus, 10.3 g SCl2 was slowly added into a soln. contg. 37.0 g N-methyl-p-toluenesulfonamide [640-61-9], 22 g Et3N, and 150 cm3 DMF at 0-10°, and the mixt. was stirred 0.5 h at 0-5°, warmed to room temp. 640-61-9 which is the cas registry number is also used here., and poured into ice water to yield bis(N-methyl-p-toluenesulfonamido) sulfide (I) [63295-09-0], m. 121-3°. An SBR compn. contg. 0.5 and 1.0 part I exhibited Mooney scorch (1 point rise) 10.5 and 11.9 min, resp. (increase in 1 point rise 87.5 and 113.5%, resp.), compared to 5.6 min for the SBR without the I; in the presence of 0.5 and 1.0 part bis(N-methyl-p-toluenesulfonamido) disulfide, the values were 6.0 and 7.9 min (7.1 and 42.7%, resp.). 640-61-9 is also in the experiment. ..