Reference

Comparison of sulfenamide accelerators in unfilled mixes

Comparison of sulfenamide accelerators in unfilled mixes. Elliott, D. J.; Atmawinata, O. 4979-32-2 and 102-77-2 are also occured in this study. (Res. Inst. Estate Crops, Bogor, Indonesia). NR Technol., 7, Pt. 3, 62-3 (English) 1976. CODEN: NRRDAI. DOCUMENT TYPE: Journal CA Section: 38 (Elastomers, Including Natural Rubber) When used in equimolar amts. and without a secondary accelerator, the Mooney scorch time in natural rubber vulcanization at 130.degree. for N,N-dicyclohexylbenzothiazole-2-sulfenamide (I) [4979-32-2] was longer than that for N-oxydiethylenebenzothiazole-2-sulfenamide [102-77-2], N-tert-butylbenzothiazole-2-sulfenamide [95-31-8], or N-cyclohexylbenzothiazole-2-sulfenamide [95-33-0], but the vulcanization rate was very slow and the vulcanization efficiency was considerably lower with this accelerator. In the presence of a secondary accelerator, i.e., 0.1 phr tetramethylthiuram disulfide, I had the shortest scorch time, the highest vulcanization rate, and the vulcanization efficiency was improved relative to the other sulfenamides. .

Reactivity optimization of prevulcanization inhibitors

Reactivity optimization of prevulcanization inhibitors. Sullivan, A. B.; Davis, L. H.; Maender, O. W. (Monsanto Polym. Prod. Co., Akron, OH 44313, USA). Rubber Chem. Technol. 14204-32-1 and 88683-40-3 which are cas registry numbers are also used here., 56(5), 1061-79 (English) 1983. CODEN: RCTEA4. ISSN: 0035-9475. DOCUMENT TYPE: Journal CA Section: 39 (Synthetic Elastomers and Natural Rubber) A series of phthalimide-based prevulcanization inhibitors (sulfenyl transfer agents) was used to examine the relationship between 2-mercaptobenzothiazole (I) [149-30-4] reactivity and inhibitor performance efficiency in SMR 5CV rubber accelerated with N-tert-butyl-2-benzothiazolesulfenamide [95-31-8]. A reactivity window for best performance for the phthalimide series was obsd. with sec-alkyl mercaptans. Inhibitors with I reactivity below the optimum were less effective because they did not compete with the accelerator for the autocatalyst. The activity also dropped off at higher reactivities, presumably due to unproductive side reactions and less secure trapping of I when the BtSSR (BtS1- is the I anion and SR is a mercaptan exchange group) was derived from a more reactive mercaptan. Reactivity optimization could be achieved with any leaving group, L, by proper selection of SR. .