| 配方类型： |
EMULSIONS |
| 配方说明： |
Tar Emulsion |
| 配方组成： |
RT-8-tar/50.000
"Ethomeen" C-25/0.063
"Carbopol" 941/0.125
Water/50.000
Sodium hydroxide (10% solution)/0.250 |
| 配制方法： |
Carefully disperse the "Carbopol" 941 in the water. When dispersion is complete, add the sodium hydroxide and then the amine. Lastly, slowly add the RT-8 tar in a thin, continuous stream (so that the rate of addition is no greater than the rate of dispersion) with good mixing.
Fairly high shear such as that provided by a medium-speed Eppenbach homogenizer, forms the best, smallest droplet-size emulsion. Excessively rapid addition of the tar results in a grainy emulsion. |
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