EP4117 General Purpose Polyester Laminating
Resin
GENERAL DESCRIPTION: 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.
MIX RATIO: The gel time and cure time are
both dependent on three parameters: (1) the percentage of MEK-P catalyst used;
(2) the temperatures of all ingredients and the surrounding environment; (3)
the mass concentration of the resin, i.e., 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. Please refer to our
information sheet on making a fiberglass part for more detailed information.
The resultant room temperature cured plastic has these properties:
Viscosity 650 cps
Specific Gravity 1.11 (9.2 lbs./ gallon)
Tensile
Strength 10,000 psi
Compressive
Strength 20,000 psi
Flexural
Strength 15,000 psi
Max.
Use Temperature 180°F
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
Qt, Gal, and 5 gallon sizes include the catalyst. With drums, catalyst must be purchased
separately by the Gallon.
Warning: Uncured product may cause respiratory or
skin irritation with possible sensitization. Use only with adequate
ventilation. If skin contact occurs, wash thoroughly with soap and water. In
case of eye contact, flood with water and call a physician. Use of gloves and
face shield is recommended. This
product should not be used near food or where prolonged skin contact may occur.
Disclaimer: This information is based on sources that we
believe to be accurate. It is offered in good faith, but without guarantee,
since conditions of use are beyond control. All risk of use are assumed by the user.