Detail of "105-12-4"

Reference

Chemical reaction interference with the rubber-to-steel-wire bonding properties of diurethane-vulcanized natural rubber

Chemical reaction interference with the rubber-to-steel-wire bonding properties of diurethane-vulcanized natural rubber. Kok, C. M.; Hepburn, C.; Blow, C. M. (Univ. Malaysia, Penang, Malay.). Plast. Rubber: Mater. Appl., 3(2), 55-65 (English) 1978. CODEN: PRMAD9. ISSN: 0307-9414. DOCUMENT TYPE: Journal CA Section: 38 (Elastomers, Including Natural Rubber) Natural rubber compns. contg. urethane or mixed urethane/S vulcanizing systems do not bond to brass-plated or steel wire; bonding is not promoted significantly by increasing the diurethane content or by addn. of p-dinitrosobenzene [105-12-4]. Bonding of rubber to brass is interfered with by the accelerator Zn diethyldithiocarbamate, which reacts with Cu in the brass to form Cu dithiocarbamate, thus preventing the Cu from acting as a pro-oxidant. The addn. of integral bonding agents, i.e. Cofill 11-hexamethylenetetramine or Co naphthanate, promotes bonding to metal wires, but with deleterious effects in the vulcanizates.

Quinoid curing of butyl and natural rubbers

Quinoid curing of butyl and natural rubbers. Gan, L. M.; Chew, C. H. (Dep. Chem., Natl. Univ. Singapore, Singapore 0511, Singapore). Rubber Chem. Technol., 56(5), 883-91 (English) 1983. CODEN: RCTEA4. ISSN: 0035-9475. DOCUMENT TYPE: Journal CA Section: 39 (Synthetic Elastomers and Natural Rubber) The vulcanization of butyl rubber (Polysar Butyl 301, IIR) and natural rubber (NR) by p-dinitrosobenzene [105-12-4], p-benzoquinone dioxime (I) [105-11-3], I dibenzoate (II) [120-52-5] and chloranil [118-75-2] oxidized by various oxidants was studied. Curing efficiency was good for IIR contg. I or II and Pb3O4. Of the quinone, ~85% was in the form of crosslinks, the remainder probably formed pendant groups. NR could be cured slowly by I or II alone. ZnO or PbO were effective in activating II to give NR vulcanizates with good scorch resistance. Crosslink d. was highest for 1:1 II-Pb3O4. 105-12-4 and 1317-36-8 are just another two chemicals used in this study. Crosslinking efficiency was generally low for quinones with NR. Vulcanization mechanisms are discussed. .