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Unsaturated Polyester Resins
Polyester Promoters (or Accelerators) manufactured by the
Shepherd Chemical Company are in widespread use. Our products
have provided successful results to major producers of Unsaturated
Polyester Resins (UPR) for years. Shepherd Chemical also offers
several promoters which are unsurpassed for clarity, allowing
customers tremendous advantages for translucency and color
control in their finished products.
Cobalt Promoters such as our 12% Cobalt Octoate, Cobalt 21
and 6% Cobalt Naphthenate accelerate the decomposition of
the organic peroxide initiators (often called catalysts) and
promote the cross-linking of polyester resins.
Potassium Octoate is used in conjunction with Cobalt for
a synergistic effect and to reduce discoloration of the final
Gel-Coat. Shepherd Chemical offers a Water-White Potassium
Octoate for customers looking for a color advantage. Potassium
may offer cost savings as well as a decline in gel-time drift.
Customers have also had success with Zinc in UPRs. Shepherd
Chemical makes a Water-White 8% Zinc Octoate to help customers
control color and offer higher clarity in their finished resins.
Copper Naphthenate offers customer control over the curing
by inhibiting the cure. Shepherd offers an 8% Copper Naphthenate
for customers looking to control surface abnormalities caused
by overly-high peak exotherms. The addition of this product
may also help to extend shelf-life to pre-promoted resins.
For customers who find that “Off-the-shelf” products
do not offer adequate benefits in promoting their Polyester
Resins, we are equipped and willing to provide custom-blending.
Products:
Cobalt Octoate
Cobalt 21
Potassium Octoate
Copper Naphthenate
Zinc Octoate
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