Plasticizer Paste Pigment Dispersions

The ability to carry pigment efficiently and economically and delivered into thermoplastic system can be achieved in many different ways. One of the oldest methods of pigment dispersion and one that is still utilized extensively today is via the use of Plasticizer Pastes. Generally a combination of pigment, plasticizer and surfactants; this blend is then processed through mechanical means to produce a homogenous mixture that can then used to color a wide range of product.

The amount of energy that is delivered through the equipment, utilized in combination with the basic formulation parameters, will determine the fineness of grind, viscosity and ultimate pigment strength that will be achieved. Depending on the final application, Plasticizer Pastes can be formulated to meet very critical parameters. Highly pigmented products tend to be rather viscous, finely ground and basically non-settling. Lower pigment loadings can be designed for lower 'pourable' viscosity but must be carefully formulated to prevent settling over extended periods of time.

Plasticizer Pastes are used extensively for calendared and extruded film processes where high pigment strength and stability are required. While this technology has been replaced by PVC dispersions in some manufacturing processes, there are still many manufacturers that utilize plasticizer pastes as a more economical method of coloring PVC film. The ability for plasticizer pastes to incorporate into pre-compounded PVC requires less energy to achieve complete color uniformity. Under ideal conditions plasticizer pastes will maintain color strength and not drift or develop as rapidly as raw pigment would do so in similar situations.

Lower viscosity plasticizer pastes are also available and are best suited for casting operations where a smooth pourable viscosity is required for uniform incorporation into a plastisol or acrylic pre-cured casting medium. As with all dispersions, additive technology plays a significant role in achieving the maximum performance from the dispersion. Our ability to design unique additive packages allows us to maximize the pigment strength providing the highest value for each pound of pigment incorporated.

Whatever the end application, Penn Color has the ability to provide a Plasticizer Paste that will meet or exceed the desired requirements, and deliver high quality color in a most efficient manner.

For more information contact us or e-mail plasticsinfo@penncolor.com.