Description

Armor Plate 784 is a thermosetting vinylester, medium viscosity, flexible resin used as a primer or lining. AP 784 is ideal for use in chemical plants and paper mills, where it can be used as:

  • primer for steel and concrete
  • lining in neutralization pits & tanks
  • a chemical resistant lining for steel and concrete
  • a pipe repair material
  • a coating for fiberglass reinforcements
  • a fixation and saturation material for fiberglass reinforcements

Chemical Resistance

Armor Plate 784 has exceptional chemical resistance to water and steam. It is also resistant to alkalies and bleaches. Contact the Wil-Cor, Inc. Technical Department for chemical resistance in specific service conditions.

Physical properties

Consistency Medium
Pot Life @ 70 °F 10-15 min.
Cure Time @ 70 °F 24 hrs.
Service Temperature Limit 210 °F
Tensile Strength (ASTM D-638) @ 77 °F 31,500 psi
Tensile Modulus (ASTM D-638) @ 77 °F 14.4 x 10-6
Compressive Strength (ASTM D-695) @ 77 °F 27,600 psi
Flexural Strength (ASTM D-790) @ 77 °F 39,000 psi
Flexural Modulus (ASTM D-790) @ 77 °F 12.7 x 10-6
Barcol Hardness (ASTM D-2583) 35-40
Linear Coefficient of Thermal Expansion, (75% Resin) in./in./°F 17 x 10-6
Glass Content (FTMS-7061) 25%
Elongation % 10-12%

Installation Recommendation

Wil-Cor, Inc. recommends supervision by Wil-Cor or that this product be installed by experienced fiberglass installers. Preparation, mixing and application information is provided for installers with adequate installation experience.

Mixing

Mix resin (part A) and catalyst (part B) at the job site, immediately prior to application. The pot life of the catalyzed resin is very short (10 to 15 min.), so only mix quantities that can be used during a 10 min. period.

The mixing ratio of Resin : Catalyst will vary with temperature. The catalyst is Armor Plate 60, methyl ethyl ketone peroxide. Use 2 to 3 oz. of catalyst for each gallon of resin.

More catalyst is needed at lower temperatures, less is needed at high temperatures. The pot life can be extended by using less catalyst.

Mix a wax additive (1 oz./gal.) with the top coat of Armor Plate 784 resin. The wax additive will prevent air inhibition and allow a proper cure for the top coat. Use wax ONLY in the top coat.

Surface Preparation

A clean surface is necessary to properly apply the Armor Plate 784. Remove dirt, oil and other contaminants by sandblasting or other mechanical methods. All surfaces must be dry before AP 784 is applied.

Application

Armor Plate 784 is applied by bristle brush with unpainted handle, squeegee, or long nap roller. Armor Clean may be used to clean equipment, but not for personal cleanup.

Allow the coating to cure for approximately 24 hours before placing in service. If it takes more than 4 or 5 hours for the applied resin to set, increase the catalyst, but DO NOT use more than 3 oz. per gallon.

The following factors affect the cure of thermosetting resins such as Armor Plate 784:

  • 1The resin temperature, the ambient temperature, and the temperature of the surface to which the resin is applied – lower temperatures lengthen the cure time.
  • 2The coating thickness-thin resin films cure more slowly than thicker resin films.
  • 3The humidity-high humidity slows the cure of resin exposed to the atmosphere.

Packaging

Armor Plate 784 components are available in stock sizes of 1-quart, 1-gallon, 5-gallon and 55-gallon drums.

Coverage and Estimating

The theoretical coverage of the Armor Plate 784
components when used as:

AP 784 Primer 150-200 sq. ft./gal. (Depends on surface roughness)
AP 784 Saturating Coat 25 sq. ft./gal. (Per laminate of 1.5 oz. chopped strand mat)
AP 784 Top Coat 150-200 sq. ft./gal.

Shelf Life

The expected shelf life of the Armor Plate 784 components in storage is 1 to 3 months if sealed tightly at temperatures around 75 °F.

Warning

For Industrial Use Only! – Flammable Liquid

Resin Component

  • Causes eye or skin irritation. Always wear suitable clothing to minimize skin Contact.
  • Vapor caused headache, dizziness, nausea and unconsciousness. Area must be ventilated. If inhaled, remove victim to fresh air. Give artificial respiration if not breathing.
  • For eye Contact, flush with water immediately.
  • For skin Contact, wash with soap and water immediately. Remove contaminated clothing.
  • If swallowed, give large amounts of milk or water to drink and seek immediate medical attention.
  • Flammable. Keep away from all sparks, flames or heat. Extinguish fires with foam, dry chemical, carbon dioxide or water spray.

Hardener – AP 60 (Methyl Ethyl Ketone Peroxide)

  • Store in a cool place away from all sources of heat.
  • NEVER store near cobalt naphthenate or other promotors, accelerators or strong reducing agents.
  • Strong irritant. Ingestion can be fatal. If swallowed, induce vomiting and call physician.
  • For eye contact, flush with water for 30 minutes and call physician immediately.
  • For skin contact, wash with soap and water immediately. Remove contaminated clothing.

Before use, review Material Safety Data Sheet for further information. Read and follow the hazard information and first aid directions on each product label before using.