Eager Polymers EP4117

Eager Polymers EP4117 is a room temperature curing, rigid, translucent, polyester resin for use with fiberglass fabric. It is an air-inhibited resin so additional layers can be applied without sanding between layers. Consequently, EP4117 is often called bonding resin or laminating resin. Successful applications include boat-building, auto body construction, mother mold production and other reinforced plastic parts by hand lay-up or chopper gun.

Polymer Name: Polyester (unspecified)

Chemical Family: Polyesters

Processing Methods: Casting, Continuous Lamination, Hand Lay-up

End Uses: Hulls, Marine Applications

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Compatible Reinforcements
Cure Method
Composites End Use
Composites Processing Methods
Mix Ratio
  • The gel time and cure time are both dependent on three parameters
  • The percentage of MEK-P catalyst used
  • The temperatures of all ingredients and the surrounding environment
  • The mass concentration of the resin, a solid-cast shape vs. thin film. A good starting point, at 72°F, is 1-1/4 % catalyst by weight. This is equivalent to 10 drops catalyst per ounce of resin, or 1 teaspoon catalyst per pint of resin. This level will result in a 15 min pot life and a 24-hour cure. As temperatures rise above 72°F, decrease catalyst, and vice-versa. Polyester resins will not cure below 60°F. Experiment until the correct ratio is determined for your specific application. In general, mix what you can use in 10 minutes. Remember to always wear eye-protection when working with polyester resin and catalyst.
  • The strength of a fiberglass composite comes from the glass fibers. Thus, in making a strong fiberglass part it is crucial to use the correct amount of resin. Using a fiberglass roller will help saturate all the fabric with a minimum amount of resin. 

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Compressive Strength20000.0psi-
Flexural Strength15000.0psi-
Maximum Use Temperature180.0°F-
Specific Gravity (9.2 lbs./ gallon)1.11--
Tensile Strength10000.0psi-
Viscosity650.0cps-

Packaging & Availability

Packaging Type
EP4117 is available in the following sizes
  • Quart Kit 2-1/4 lb
  • Gallon Kit 9 lb
  • 5 Gallon Kit 45 lb
  • 55 Gallon Drums 500 lb
Packaging

Qt, Gal, and 5 gallon sizes include the catalyst.  With drums, catalyst must be purchased separately by the Gallon.