Dispersion resins plastisol fusion

Because of the low level of emulsifiers and protective colloids, the suspension polymer types are most suitable for electrical applications and end uses requiring clarity, This form is also employed in the bulk of extrusion and molding applications. Cost is lower than for emulsion and solution forms. The emulsion or dispersion resins are employed mainly for organosol and plastisol applications where fast fusion with plasticizer at elevated temperature will occur as a result of the fine particle size of the resin. 

J m dia and dried by spray-drying or coagulation, are used as plastisol resins. Plastisols are dispersions of PVC in plasticizer. Heat allows fast diffusion of plasticizer into the PVC particle, followed by fusion (gelation), to produce a physically cross-linked elastomer, where the physical cross-links are PVC crystallites. 

Dispersion Resins n Used as the primary vinyl resin in the production of plastisols and organosols. These resins are fine, white powders, with an average particle size of 1 pm and a bulk density of approximately 15-20 lb per cubic foot. The fine particle size, combined with the dense nature of the particle allows these products to be easily dispersed in plasticizers and solvents. The specific selection of a dispersion resin is primarily based on the fusion, rheological and appearance requirements of the end product and the manufacturing process. 

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