PRODUCT NUMBER

PRODUCT NAME

22-26 mixed

WHITE WATER-BASED EPOXY PRIMER

GENERAL DESCRIPTION

Pruett-Schaffer’s #22-26 White Epoxy Primer is a two component, water based, amine cured epoxy for use where good chemical resistance is needed. It is designed as a semi gloss, spray applied, corrosion resistant, heavy duty, primer. It exhibits excellent adhesion, including untreated aluminum, over a wide variety of substrates, and has very good abrasion, corrosion, water and chemical resistance in a low odor water reducible system.

RECOMMENDED USES

Use to protect machinery, tanks, railcars and structures from corrosion in aggressive environments where chemicals, salt, water, fuels, and oils are present. As formulated, the product passed FDA extraction testing for direct contact with food & allow high film build in one pass to protect hard to cover sharp edges. May also be used as an encapsulation coating. This formula will chalk on long term exposure to sunlight.

SURFACE PREPARATION

For severe service, metal substrates should be blasted to an SSPC-SP-10 white metal blast with a 1.5 +/- .5 mil blast profile. An SP-6 commercial blast may be sufficient for many repair applications with less severe requirements. It can be applied over tightly adhering existing coatings. Degreasing and hand tool cleaning, power washing, brush blasting, sanding, or a combination of these methods may be acceptable for use over existing coatings.

All surfaces to be coated must be clean, dry, and free of oil and grease, loose rust

and paint, weld spatter, burning slag, dust, and chalk.

MIXING INSTRUCTIONS

Mix 4 parts by volume #22-26-A with 1 part 22-26-B Hardener. Mix at slow speed to avoid entraining air into the paint. Plural component equipment may be used set to 4:1 (A:B). Do not use heating in the lines or on the drums. Use at once, there is no induction time. Do not reuse previously used mixing containers; partially cured material will greatly accelerate the cure of the freshly mixed paint resulting in dramatically reduced pot life.

THINNING

Thin if necessary for spraying, thin with water. Add a little at a time to the mixed system with constant gentle agitation to a maximum of 1% by volume. If product has “set to touch” it may be necessary to use a solvent like Xylol to remove it before totally cured.

APPLICATION EQUIPMENT

May be applied by brush, roller or airless spray. Airless spray gives the best results, use .015-.020 inch tip size. 3000-3500 psi at the pump. Apply 8-12 mils wet film thickness to yield 4-6 mils dry film thickness. Brushes should be of polyester or nylon construction. 66 series anti-graffiti coatings can be applied over 22-26 in 4 hours to 10 days dry.

CURE TIMES & TEMPERATURES

Dry Film Thickness 2-4 mils

Dry Times (ASTM D-5895B)

Set to touch .3 hrs

Cotton free .5 hrs

Through 1.5 hrs

Pencil hardness (ASTM D-1186)

24 hrs F

14 days F

CLEANUP

Clean equipment with water while wet. Use xylol or toluol before the film cures if no longer water soluble.

TOUCH UP

Touch up areas can be lightly sanded and recoated. Sanding is not necessary if recoated up to 48 hours after original coating is applied.

ENVIRONMENTAL

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions. It is VOC compliant for the architectural maintenance industry, and contains no lead, chromate, or zinc.

PHYSICAL PARAMETERS

VOC, ASTM D-3960: .94 lb/gal mixed system

WEIGHT PER GALLON, ASTM D-1475:

11.32 lbs mixed system

NONVOLATILE, mixed system:

By weight: 62 +/- 2.0 %

By volume: 49 +/- 1.0%

THEORETICAL COVERAGE:

780 ft²/gallon/mil, dry film

INITIAL GLOSS, 60^, ASTM D-523:

<50

VISCOSITY, mixed system, ASTM D-562:

Krebs Units 85-105 KU

POT LIFE, mixed in 4 gal lots:

hrs @ 77 ^F; 4-5

FLASH POINT, TAG CC: over 141 deg F

Impact Resistance (ASTM D-2794)

Direct 28 in/lb

Reverse 4 in/lb

DI Water Resistance (ASTM D-870)

83 Days (D-714) blister rating 10(none)

Salt Spray resistance (ASTM B-117)

2000 hrs

BLISTER RATING 10 (none)

Scribe creep 1-3 mm

21 CFR 175.300 Table 2 Extraction Test:

Passed both water and heptane tests at 250 degrees F for two hours.

THIS INFORMATION RESULTS FROM TESTS CONDUCTED IN A LABORATORY UNDER LABORATORY CONDITIONS. DIFFERENT RESULTS MAY BE OBTAINED IN COMMERCIAL USE OF THIS PRODUCT UNDER FACTORY OR FIELD CONDITIONS. PRUETT-SCHAFFER MAKES NO WARRANTY CONCERNING THE SUITABILITY OF THIS PRODUCT FOR THE END USE CONTEMPLATED BY THE BUYER, EXCEPT THAT THE PRODUCT SHALL BE IN COMPLIANCE WITH THE TECHNICAL SPECIFICATIONS PRESENTED HEREIN.