Emulsifiable concentrate description

The Smith-Ewart kinetic theory of emulsion polymerization is simple and provides a rational and accurate description of the polymerization process for monomers such as styrene, butadiene, and isoprene, which have very limited solubility in water (less than 0.1%). However, there are a number of exceptions. For example, as we indicated earlier, large particles (> 0.1 to 0.5 cm diameter) may and can contain more than one growing chain simultaneously for appreciable lengths of time. Some initiation in, followed by polymer precipitation from the aqueous phase may occur for monomers with appreciable water solubility (1 to 10%), such as vinyl chloride. The characteristic dependence of polymerization rate on emulsifier concentration and hence N may be altered quantitatively by the absorption of emulsifier by these particles. Polymerization may actually be taking place near the outer surface of a growing particle due to chain transfer to the emulsifier. 

Generally, the factors that affect the interfacial shear viscosity can also affect the IFPYV of the interfacial film. In most cases, the influence of the factors on both the interfacial shear viscosity and IFPYV is identical. The following gives a brief description of the influence of the emulsifier concentration and temperature on the IFPYV of the interfacial film. 

A physical description of the chemical (wettable powder, granule, emulsifiable concentrate, etc.) ... 

Chemical Description Dried gummy exudate obtained from Astragalus gummifer Function in Formula Effective emulsifying agent, stabilizer in lotions Use Concentration 1.0-1.5% in shampoo 1.0-2.0% in toothpaste Solubility Characteristics Cold-water-soluble... 

---