Reference

Unsuitability of using scorch inhibitors in rubber mixes processed by injection molding

Unsuitability of using scorch inhibitors in rubber mixes processed by injection molding. Varaksin, M. E.; Al'tzitser, V. S.; Borisenko, I. S.; Kornev, A. E. (Nauchno-Issled. Inst. Rezin. Lateksnykh Izdelii, Moscow, USSR). Kauch. Rezina, (6), 29-31 (Russian) 1977. CODEN: KCRZAE. DOCUMENT TYPE: Journal CA Section: 38 (Elastomers, Including Natural Rubber) The use of scorch inhibitors e.g., PhCO2H [65-85-0], Santogard PVI [17796-82-6], or Santocure MOR [102-77-2], is undesirable during prodn. of rubber-textile footwear by injection molding of SKI-3s-SKS-30 ARKPN rubber blend since the small amts. of sorch inhibitors that may be added (considering that the optimum vulcanization time of the rubber blend at 170.degree. is 4 min) are inadequate to alter the scorch resistance of the blend. The scorch inhibitors also adversely affected the physicomech. properties of the vulcanizates. Injection-moldable rubber blends are most effectively processed by using a synergistic combination of an ultraaccelerator (e.g., thioperoxydicarbonic diamide [504-90-5]), an inhibited accelerator, and a small amt. (1%) of S.

Studies on the reactions between thiocarbamyl sulfenamide and 2-(iminodithio)benzothiazole accelerator system in the early stage of vulcanization of NR

Studies on the reactions between thiocarbamyl sulfenamide and 2-(iminodithio)benzothiazole accelerator system in the early stage of vulcanization of NR. Datta, Rabindra Nath; Das, Prasanta Kumar; Basu, Dipak Kumar (Dep. Macromol., Indian Assoc. Cultiv. Sci., Calcutta 700032, India). J. Appl. Polym.Several reagents such as 34986-67-9 is used here. Sci., 32(7), 5849-64 (English) 1986. CODEN: JAPNAB. ISSN: 0021-8995. DOCUMENT TYPE: Journal CA Section: 39 (Synthetic Elastomers and Natural Rubber) The interactions of the synergistic pair of N-cyclopentamethylenethiocarbamyl-N'-oxydiethylene sulfenamide [34986-67-9], N-oxydiethylenethiocarbamyl-N'-cyclopentamethylene sulfenamide (I) [34988-47-1], 2-morpholinodithiobenzothiazole [95-32-9], and 2-piperidinothiobenzothiazole (II) [26773-65-9] were studied by HPLC. The I-II system yielded natural rubber vulcanizates which exhibited the greatest vulcanization d., scorch safety, and highest modulus and tensile strength. The high activity of the binary systems studied as compared to that obtained from comparable thiocarbamyl sulfenamide plus dibenzothiazyl disulfide system was explained. Zn-dithiocarbamates influenced the vulcanization reactions depending upon the compn. of the mixed accelerators. Cyclohexyl thiophthalimide [17796-82-6] vulcanization retarder reacted with the accelerators to yield cyclohexyl thiomorpholine and cyclohexyl thiopiperidine which also has a profound effect upon vulcanization retardation. .