Entropy Optically Brightened Laminating Epoxy Resin
Entropy Optically Brightened Laminating Epoxy Resin
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Entropy Optically Brightened Laminating Epoxy Resin (BRT) is the base component of Entropy's optically brightened epoxy system. Based on Entropy's Clear Epoxy (CLR), BRT resin is formulated specifically for white surfboard builds, hand layups, room-temperature laminating processes, and infusion laminating carbon fiber, fiberglass, Kevlar, or wood. Its bright white finish shows little or no color change after extended sun exposure.
Pair BRT resin with CLS, CLF, or CLX hardeners. Choose CLS slow hardener for extended working time, CLF fast hardener for shorter pot life, faster curing, & low blush in cooler temperatures, and CLX hardener for the fastest tack-free time.
All systems have a bio-content greater than 30% & can be modified with colorants & fillers.
NOTE: Not recommended for dark color substrate applications, use Clear Laminating Resin (CLR) instead.
| Optically Brightened (BRT) Laminating Epoxy Resin & Hardener, Admixed | Clear Extra Fast Hardener (CLX) | Clear Fast Hardener (CLF) | Clear Slow Hardener (CLS) |
|---|---|---|---|
| Color | Clear | Clear | Clear |
| Mix Ratio by Volume | 2:1 (resin:hardener) | 2:1 (resin:hardener) | 2:1 (resin:hardener) |
| Mix Ratio by Weight | 100:47 (resin:hardener) | 100:47 (resin:hardener) | 100:47 (resin:hardener) |
| Pot Life @ 77°F | 18 minutes | 21 minutes | 43 minutes |
| Tack-Free Time @ 77°F | 2 hours | 4 hours | 8 hours |
| VOC Content | 19.5 g/L (0.16 lbs/gal) | 31.5 g/L (0.26 lbs/gal) | 16.1 g/L (0.13 lbs/gal) |
| Biobased Carbon Content | 21% | 21% | 29% |
| Tensile Strength | 9,500 psi | 9,500 psi | 9,800 psi |
| Elongation | 6% | 5% | 6% |
| Flexural Strength | 14,000 psi | 13,500 psi | 14,580 psi |
| Compression Strength | 11,330 psi | 11,330 psi | 12,520 psi |
| Tg Ultimate | 170°F | 149°F | 171°F |
| Hardness, Shore D | 70-80 | 70-80 | 70-80 |
| Optically Brightened Laminating Epoxy Resin (BRT) Quantity | CLX, CLF, or CLS Hardener Quantity | Mixed Quantity |
|---|---|---|
| 1 qt. resin | 16 oz. hardener | 48 oz. |
| 1/2 gallon resin | 1 qt. hardener | 3 qt. |
| 1 gallon resin | 1/2 gallon hardener | 1.5 gallons |
| 5 gallons resin (exact fill weight is 4.713 gallons) | 2.5 gallons hardener | 7.5 gallons |
Why Use Optically Brightened (BRT) Super Sap® Laminating Epoxy Resin?
Super Sap formulations, as opposed to traditional epoxies that are composed primarily of petroleum-based materials, contain renewable, biobased materials sourced as co-products or from the waste streams of other industrial processes, such as bio-fuels and wood pulp production. The benefits of these natural components are exceptionally high adhesion properties and excellent elongation.
Three Easy Ways to Measure Optically Brightened Laminating Epoxy Resin and Hardener
- By Volume: 2 parts resin to 1 part hardener.
- By Weight: Varies. Check Technical Data Sheets for specific ratio.
- By Pumps: The calibrated Entropy Pump Set (sold separately) measures the exact 2:1 ratio by volume with no mess or guessing about correct measurements, so you get a proper cure every time. Pumps can be used with the 2:1 High Bio-Based Laminating Epoxy Resin (ONE), Clear Epoxy Resin (CLR), Optically Brightened Laminating Epoxy Resin (BRT), Compression Molding Epoxy Resin (CPM), and Clear Casting Epoxy Resin (CCR) systems.
Measuring & Mixing Notes: For best results, use a scale to measure the two components by weight (within 5% of the recommended mix ratio). Always mix product thoroughly for at least two minutes. To ensure complete mixing, scrape all surfaces of the container.
Technical Information
Entropy Optically Brightened Laminating Epoxy Resin (BRT) Features
- Bright white color is ideal for ultra-white marine cosmetic laminating applications.
- Choose from Extra Fast (CLX), Fast (CLF), and Slow (CLS) Hardeners to adjust working properties and cure time
- UV stable formula
- Low exotherm
- Excellent air release
- Requires corresponding sized CLX (Extra Fast), CLF (Fast) or CLS (Slow) hardener for use (2:1 mix ratio). See chart below.
Best Use for Optically Brightened (BRT) Laminating Epoxy Resin & CLX, CLF, or CLS Hardeners
- White surfboards
Safety and Handling Information
Despite the natural derivation of Entropy resin products, exposure to these materials represents hazards typical of all epoxy resins. Exposure should be minimized and avoided through the use of proper personal protective clothing & equipment, and appropriate manufacturing controls. All persons who use, store, or transport these materials should understand proper handling precautions and recommendations, as stated in the SDS (safety data sheets).
WARNING: This product can expose you to chemicals, including epichlorohydrin, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov