diphenylguanidine

diphenylguanidine

[dī¦fen·əl′gwän·ə‚dēn]
(organic chemistry)
HNC(NHC6H5)2 A white powder, melting at 147°C; used as a rubber accelerator. Also known as DPG; melaniline.
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2]/g (Ultrasil 7005, Evonik Industries AG, Germany), treated distillate aromatic extract, or TDAE oil (Vivatec 500, Hansen & Rosenthal, Germany), zinc oxide (Global Chemical, Thailand), stearic acid (Imperial Chemical, Thailand), polymerized 2,2,4-trimethyl-1,2-dihydroquinoline or TMQ, diphenylguanidine or DPG and N-cyclohcxyl-2-benzothiazolesulfenamide or CBS (all from Flexsys, Belgium), and sulfur (Siam Chemical, Thailand).
5 (a) Two-stage mixing, Brabender 350S, internal mixer (b) N-cyclohexyl-2-benzothiazylsulfenamide, Vulcacit CZ/ EG, Lanxess AG (c) Diphenylguanidine, Vulkacit D, Lanxess AG (d) Second stage (curing system) (e) VivaTec 500, Hansen and Rosenthal KG (f) Evonik (g) N-(1,3-dimethylbutyl)-N'-phenyl-1,4-benzenediamine, Duslo a.
The diphenylguanidine (DPG) belongs to the guanidines family, which is commonly used as a secondary accelerator in silica-filled rubber.
Polymerized 2,2,4-trimethyl-1,2-dihydroquinoline (Flexol TMQ) and N-isopropyl-N'-phenyl-p-phenylenediamine (Santoflex IPPD) antioxidants and the accelerators N-cyclohexylbenzo-thiazole-2-sulfenamide (Santocure CBS), N-t-butylbenzothiazole-2-sulfenamide (Santocure TBBS), diphenylguanidine (Perkacit DPG) and tetramethylthiuram disulfide (Perkacit TMTD) are commercial products of Flexsys America.
To illustrate the properties of compound 1, comparative data are presented in table 11, where MBT has been replaced with diphenylguanidine (DPG) and cylohexylbenzothiazole sulfenamide (CBS) at equal phr.
Compounds can be accelerated with diphenylguanidine (DPG) and 3-methyl-thazolidene-2-thione and retarded with a sulfonamide derivative or N-cyclo-hexylthiophthalimide.
DPG = Diphenylguanidine CBS = Cyclohexylbenzothiazole-2-sulfenamide ZBEC = Zinc-dibenzyldithiocarbamate MBT = 2-Mercaptobenzothiazole ZDBP = Zinc-dibutyldithiophosphate [p.
diphenylguanidine, in blends of Exxpro and dienes can contribute to bin storage problems.