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| Akrochem DPG |
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| Diphenylguanidine |
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| 102-06-7 |
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AKROCHEM DPG is useful as an accelerator/activator for natural rubber, SBR and NBR.
It activates accelerators such as MBT, MBTS and other thiazoles.
It is a strong secondary for CBTS, TMTM, TMTD, MBT and MBTS.
DPG requires the use of zinc oxide and fatty acids.
Fatty acids in excess of 1% decrease tensile and tear strength properties.
DPG does give satisfactory processing safety and storage stability to rubber compounds.
In light colored goods, it causes a brown discoloration and is not recommended for use in compounds that have contact with food.
Vulcanizate properties of stress (modulus) are high, however elongation decreases with an increase in cure time.
For best aging results, an antioxidant is required.
Suggested concentrations of DPG in combination with zinc oxide, stearic acid, and sulfur are as follows:
Natural Rubber ....................................0.3 - 0.6 phr with CBTS or MBTS
SBR ....................................................0.15 - 0.75 phr with CBTS, MBTS or MBT
NBR....................................................0.10 - 0.50 phr with CBTS |
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Appearance non-dusting white powder or pellets
Odor weak with a bitter taste
Specific Gravity 1.19
Melting Point 145 C minimum
Ash Content 0.3% maximum
Solubility Acetone, methylene chloride, ethyl acetate, ethyl alcohol and benzene.
Insoluble in gasoline and water.
Storage Stability Excellent
Dispersion Very Good |
| Industrial field |
additive, rubber & additives |
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