Archive for February, 2010
Vulcanization Accelerators
February 20th, 2010 | 
Author: Sulfur, by itself, is a slow vulcanizing agent. Large amounts of sulfur are necessary high temperature and long heating periods and one obtains an unsatisfactory crosslinking efficiency with unsatisfactory strength and aging properties. The multiplicity of vulcanization effects demanded can not be achieved with one universal substance, a large number of diverse materials is necessary. Accelerators need metal oxides for the development of their full activity, zinc oxide (ZnO) is the best additive.
The most important organic vulcanization accelerators can be summarized in the following classes.
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Classes |
abbrevation |
| Mercapto-accelerators
2-Mercaptobenzothiazole Zinc-2- mercaptobenzothiazole Dibenzothizyl disulfide Sulfenamide-accelerators N-cyclohexyl-2-benzothaiazylsulfenamide N-tert-butyl-2-benzothiazylsulfenamide 2-Benzothiazyl-N-sulfenemorpholide N,N-dicyclohexyl-2-benzothiazylsulfenamide Thiuram accelerators Tetramethythiuram disulfide Tetramethythiuram monosulfide Tetraethylthiuram disulfide Dimethydiphenylthiuram disulfide Dipentamethylenthiuram tetrasulfide Dithiocarbamate acceterators Bismuth dimethyldithiocarbamate Copper dimethyldithiocarbamate Cadmium pentamethylenedithiocarbamate Lead dimethyldithiocarbamate Tellurium dimethyldithiocarbamate Selenium dimethyldithiocarbamate Sodium dibutyldithiocarbamate Sodium dimethydithiocarbamate Piperidine pentamethylenedithiocarbamate Zinc dibenzyldithiocarbamate Zinc diethyldithiocarbamate Zinc dimethyldithiocarbamate Xanthate Accelerators Zinc isopropylxanthate Zinc butylxanthate Sodium isopropylxanthate Dithiocarbamylsulfenamide N-oxydiethylenedithiocarbamyl-N’-oxydiethylene sulfonamide Guanidine Acceterators Diphynylgyanidine Di-o-tolylguanidine o-Tolylbiguanidine Amine Accelerators Butyraldehydeaniline Tricrotonylidenetetramine Hexanmethylenetetramine Polyethylenepolyamines Cyclohexylethylamine Dibutylamine Sufer Donors 2-Benzothiazole-N-morpholyldisulfide Dimorpholine disulfide Vulcanization Retarders Benzoic acid Salicylic acid |
MBT ZMBT MBTS
CBS TBBS MBS DCBS
TMTD TMTM TETD MPTD DPTT
BiDMC CuDMC CD5MC PbDMC TeDMC SeDMC NaDBC NaDMC PPC ZBEC ZDEC ZDMC
ZIX ZBX NaIX
OTOS
DPG DOTG OTBG
BAA TCT HEXA PEP CEA DBA
ZDBP CuIDP
BES SCS |
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