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Technical Bulletin

EB-6917
AUGUST, 1990
Supersedes all previous publications

EB-6917 BAKED EPOXY COATINGS (Low VOC's)

GENERIC TYPE: A two packaged high solids baked epoxy coating.

RECOMMENDED USAGE: Heresite EB-6917 is specifically formulated for immersion or industrial maintenance applications. It provides outstanding chemical resistance to a wide variety of alkalies, salts, petroleum products, and other aqueous solutions.

The EB-6917 epoxy coatings are excellent for hot caustic service in concentrations to 73%. Please contact your representative for a recommendation regarding your specific operating conditions

CHEMICAL RESISTANCE GUIDE:
EXPOSURE IMMERSION SPLASH & SPILLAGE
Acids Good Excellent
Alkalies Excellent Excellent
Solvents Good Excellent
Inorganic Salts Excellent Excellent
Water Excellent Excellent

ORDERING INFORMATION:

Shipping Weight:
EB-6917 Approx. 13 lbs./gal.
S-330 Solvent Approx. 8½ lbs./gal.
Flashpoint (T.C.C.):
EB-6917 20oF (-7oC)
S-330 Solvent 20oF (-7oC)
PRIMER
Not required.
PACKAGING
EP-6917 is available in 1 gallon & 5 gallon kits
SHELF LIFE:
24 months at 70°F in unopened containers.
POT LIFE:
24 hours at 70°F.
PHYSICAL DATA:
Solids by Weight: approx 94%
Solids by Volume: approx 88%
Viscosity: 75 Krebs Units
Flexibility: Passes Zuhr Conical Mandrel ½" bend
Temperature Limitation: Dry heat temperatures up to 325°F (163°C). Temperature excursions up to 400°F (204°C) can be tolerated for short durations.

V.O.C.: .75 lbs/gal. as supplied.

STANDARD COLOR: Tan

COVERAGE:
Theoretical Coverage: 1408 square feet per gallon per mil. (At 13 mils DFT average coverage would be 87 square feet per gallon. This includes a 20% loss factor.)

Recommended total dry film thickness is as follows:

Environment Dry Film Thickness No. of Coats
Immersion 12-15 Mils 2
Highly Corrosive Fumes 12-15 Mils 2
Mildly Corrosive Fumes 7-10 Mils 2
Maintenance 6-8 Mils 1

SURFACE PREPARATION:
Remove all oil, grease, and other contaminants. All seams should be continuously welded, weld splatter removed and all edges radiused. (See Bulletin No. 113, "Fabrication Specifications.")

STEEL:
IMMERSION: A white metal blast is required in accordance with NACE #1 or SSPC-SP-5-63 specifications.
NON-IMMERSION: A commercial blast is acceptable in accordance with NACE #3 or SSPC-SP-6-63 specifications.

Surface profile or anchor pattern shall be 20-25% of the recommended dry film thickness.

CONCRETE: Not Applicable.

EQUIPMENT:

  1. All spray equipment shall be thoroughly cleaned and be free of old paint film and other contaminants.
  2. Use stand production type guns
    Guns Fluid Air
    DeVilbiss JGA-502 E 704
    Binks #62 66-SS 66-SD
    Graco P800 04 02
  3. Air supply shall be uncontaminated.
  4. Airless spray equipment: 1500-1800 PSI liquid pressure. Tip size from .015" to .019". Thinning requirements are less than for conventional spray.

MIXING:
Stir Part A Thoroughly, then stir Part B thoroughly. Add the contents of Part B to the container of Part A. Mix thoroughly and allow the mixed material to age 30 minutes before using. Mixed material must be used within 24 hours.

PRIMER: Self priming on steel

THINNING:
The type and amount of thinner required is dependent upon temperature, ventilation, humidity, spray equipment used, and desired film thickness. Suggested thinning at 75°F (24°C) is 10-20%. HERESITE S-330 solvent is recommended for normal applications.

APPLICATION:

  1. Do not apply if temperature is less than 5°F (2°C) above dew point.
  2. Adjust air pressure to approximately 80 pounds at the gun and provide 15-20 pounds pot pressure. Adjust spray gun by first opening liquid valve and then adjust air valve to give approximately an 8" to 12" fan.
  3. Holding gun perpendicular to the surface at a distance of 12", apply a mist bonding pass.
  4. Allow to flash off for several minutes, but not long enough to allow film to completely dry.
  5. Apply 3-4 criss-cross multi-passes maintaining a wet appearing film.
  6. Repeat Step #5 until desired film thickness is obtained.
  7. Clean equipment immediately with HERESITE S-330 solvent.
  8. Let first coat air dry with ventilation for approximately 10-16 hours at 70°F, but not longer than 72 hours. NO INTERMEDIATE BAKING REQUIRED BETWEEN COATS.
  9. For second coat, repeat Steps #1 through #7.
  10. Air dry final coat with ventilation for approximately one hour prior to introducing heat. After the air dry period has elapsed the temperature should be raised approximately 40°F (22°C) in increments of 30 minutes until the desired temperature is reached.
  11. Coating should be final cured according to the following schedule:
    175°F (75°C) -- 12 hours
    250°F (121°C) -- 4 hours*

    *Best chemical resistance at higher bake temperature

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APPLICATION INSTRUCTIONS

These instructions are not intended to show product recommendations for specific service. They are issued as an aid in determining correct surface preparation mixing instructions, and application procedure. It is assumed that the proper product recommendations have been made. These instructions should be followed closely to obtain the maximum service from the materials.

CAUTION: CONTAINS FLAMMABLE SOLVENTS. KEEP AWAY FROM SPARKS AND OPEN FLAMES. IN CONFINED AREAS WORKMEN MUST WEAR FRESH AIR LINE RESPIRATORS. HYPERSENSITIVE PERSONS SHOULD WEAR GLOVES OR USE PROTECTIVE CREAM. ALL ELECTRIC EQUIPMENT AND INSTALLATIONS SHOULD BE MADE AND GROUNDED IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE. IN AREAS WHERE EXPLOSION HAZARDS EXIST, WORKMEN SHOULD BE REQUIRED TO USE NONFERROUS TOOLS AND TO WEAR CONDUCTIVE AND NON SPARKING SHOES.

To the best of our knowledge the technical data contained herein are true and accurate at the date of issuance and are subject to change without prior notice. No guarantee of accuracy is given or implied. We guarantee our products to confirm to strict quality control. We assume no responsibility for coverage, performance or injuries resulting from use. Liability, if any, is limited to replacement of products. Prices are subject to change without prior notice. NO OTHER WARRANTY OR GUARANTEE OF ANY KIND IS MADE BY THE SELLER, EXPRESS OR IMPLIED, STATUTORY, BY OPERATION OR LAW, OR OTHERWISE, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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