| 配方類型： |
MISCELLANEOUS |
| 配方說明： |
Asphalt Emulsion (Soft) |
| 配方組成： |
"Ethomeen" C/25/0.75
"Carbopol" 941/1.50
"Sohio" 180-200 Asphalt/400.00
Brookfield Visc., 20 rpm---5500 mPa.s or cP
Sodium Hydroxide *(10% soln.)/4.50
Water/400.00
pH---6.5 |
| 配制方法： |
Carefully disperse the "Carbopol" 941 resin in the water. After thorough dispersion, neutralize the sodium hydroxide followed by the "Ethomeen" C/25. Heat this mucilage to 65-70 C. (The water can be heated prior to adding "Carbopol" 941 resin and neutralizer. This will assist dispersion of the "Carbopol" 941 resin.) Separately heat the asphalt to 85 C. Utilizing moderately high shear mixing, slowly add the molten asphalt to the water mucilage. Add the asphalt no faster than the rate of dispersion. If the asphalt is added too rapidly, the emulsion will invert and separate. When the asphalt has been added, continue mixing for a short time to ensure uniformity. Shock cool the emulsion without mixing and allow it to remain undisturbed until its temperature falls to 30-35 C.
Note: This emulsion is stable on aging and very smooth in appearance. |
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