Masterbatch Additional Information

Storage Stability of Rubber Masterbatch:

From time to time, we are asked how long color or chemical masterbatches can be stored. As you know, the SBR manufacturers generally recommend that SBR be used before it is a year old. Other polymers may have an even shorter "shelf life." Age can adversely affect the quality of a rubber masterbatch.

Akrosperse®, Akrochex™, and Akroform® rubber masterbatches, containing either colors or chemicals, are stabilized against oxidization of the polymer. Nevertheless, some colors and chemicals will cause problems on aging when in the masterbatch form. We have noted masterbatches of our manufacture that are three years old and still in good condition. However, we have also encountered dispersions, less than one year old, that had become stiffer and harder and/or had an oxidized surface. Such a condition may effect the utility of the masterbatch rendering it unsatisfactory for its intended use.

Our advise to all users of color or chemical masterbatches is to store them in a dry place, away from any heat or ozone source.

We recommend that Akrosperse, Akrochex, or Akroform masterbatches be used within nine months. Any material older than that should be evaluated before being used. It probably will prove to be a satisfactory dispersion, even after nine months, but it should be tested and discarded if it is not.

Silicone Rubber:

Silicone Color concentrate MB's are dispersions of organic and inorganic pigments in Silicone Rubber.

Typical pigment concentrations range from 30% - 65% by weight depending on the specific gravity of the pigment being used.

Packaging is as follows:

  • 50 lbs. - 13" x 13" x 13" box
  • 450 - 500 lbs. - 13" x 30" x 44" gaylord

Minimum Order - 300 lbs.

Plant trials - 80 to 100 lbs.

F.O.B. Akron