Guanidine diphenyl

Fibre Crosslinking thiu- thiuram D ram + sulfur. b agent diphenyl guanidine + sulfur Strength in gf/texc Elongation in % Abrasive resistance, no. of cycles Resistance to double tend, no. of cycles... 

Reduction of the adhesion level will occur if certain compounding ingredients are not avoided. The acceleration system has a direct effect on the adhesion level dibenzothiazole disulphide (MBTS) gives the highest adhesion levels. If a second accelerator is used, e g., tetramethyl thiuram disulphide (TMTD) or diphenyl guanidine (DPG), then the adhesion is significantly affected. Other ingredients which cause problems are plasticisers and process oils. 

N,N -Diphenyl-guanidine, Melanilineor N.N -Diphenyl-iminoorea. See Bis(phenyl)-guani-dine in Vol 2, p B154-L. It was proposed by E. Wydler [SwissP 144148(1929) CA 25, 5179(1931)] to be used as a stabilizer in smokeless propellants... 

N N -Diphenyl-guanidine see Bis (phenyl)-guani-dine 2 B154 5 D1462... 

The commercially important representatives of group 4 are diphenyl guanidine and diortho tolyl guanidine. Group 5 includes a number of aldehyde aniline reaction products such as formaldehyde aniline, ethyledene aniline, butraldehyde aniline, heptaldehyde aniline hexa methylenetetraamine and acet-aldehydeaniline. Aetaldehyde, butraldehyde and heptaldehyde derivatives of aromatic amines are powerful accelerators. 

Figure 12.5a shows the effect of filler loading on the volume resistivity of MWNTs and CB (CB Ensaco 250G from Timcal) filled composites based on insulating styrene-butadiene rubber. The styrene-butadiene rubber contains 25 w% of styrene units. The microstructure of the butadiene phase is the following 10% cis, 17% trans, 73% 1,2. It was compounded with sulfur (1.1 phr), cyclohexyl benzothiazole sulfenamide (1.3 phr), diphenyl guanidine (1.45 phr), stearic acid (1.1 phr), zinc oxide (1.82 phr) (phr = parts per hundred parts of rubber). The unfilled and filled samples are cured into films (around 200 pm thick) at 170°C during 10 min under a pressure of 150 bar in a standard hot press. 

Cure system species, accelerators and their reaction products This class of additive can present problems as they are often thermally labile, reactive and, in some cases, have a degree of ionic character (e.g. zinc dithiocarbamate salts). In these cases LC-MS is a more appropriate technique than GC-MS. It is also easier to use LC-MS with a number of the approved food simulants as they can be injected directly into the instrument, being compatible with the mobile phase. In some cases the reaction products (e.g. aniline from diphenyl guanidine, and benzothiazole from thiazole and sulphonamide accelerators) are stable and so GC and GC-MS can be used. Peroxides are popular curatives for food use rubbers and the stable, breakdown products of these can be easily detected by GC-MS. 

HAF carbon black 40, zinc oxide 5, N-cyclohexyl-2-benzothiazole sulfamide 1, diphenyl guanidine 1, stearic acid 1 and sulfur 1.5. After 40 mins, of milling, the homogeneous stock was cured for 30 minutes at 160°. Extraction was carried out witii n-hexane at 65° for 24 hours. 

Curing recipe, parts Epsyn 40A (Copolymer Co., Sarnia, Ontario) 100, Zinc Oxide 5, Santo-cure (Monsanto) 1, Diphenyl Guanidine 0.5, Stearic Add 1, Sulfiir 1.25, cured 35 minutes at 160 C. 

Accelerators used include hexamine, diphenyl guanidine, ethylidene aniline, mercapto-benzothiazole, dibenzothiazole disulfide, N-Cyclohexyl benzothiazole sulfenamide, sodium diethyl dithiocarbamate, tetramethylthiuram disulfide, tetraethyl thiuram disulfide, dipentamethylene thiuram tetrasulfide, sodium isopropyl xanthate, zinc butyl,... 

Boron may be extracted from aqueous boric acid solutions rapidly and effectively (97% of B in one extraction) using napththalene-2,3-diol-diphenyl-guanidine-butanol... 

Department of Transportation (U.S.) diphenyl guanidine, dipropylene glycol diy solids basis... 

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