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Paint Systems
 

Paint Systems

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  • Mar rate – Kynar is more flexible and softer Polyester – SMP Harder resin

Paint Systems Paint Systems Presentation Transcript

  • “ Paint Systems”
  • Paintable Substrates
    • Aluminum
    • Galvanized Steel (HDG)
    • Galvalume
  • Why Do We Paint?
    • Provide protection
    • Add aesthetic appeal
    • Promote corporate brand and increase recognition
    • Decrease energy costs
  • What is Paint? Definition : A mixture of a pigment, resin, solvent and additives reduced to a liquid or paste form, applied usually with a brush or roller, and used as a protective covering or coloring of a surface.
  • The Pigments
    • Ceramic Pigments
    • Earth Tone Pigments
    • Organic Pigments
    • Small solid particles added to a paint to enhance appearance by providing color and /or improve physical (functional) properties of a paint. Pigments are protected by the resin system and are UV reflective.
  • Different Pigments Offer Different Performance Properties Inorganic – Ceramic Earth Tone Organic Best Good Better
  • The Resin
    • The most important part of any paint system. The liquid glue of the paint system that surrounds and protects the pigment particles.
    • Polyester
    Fluoropolymer (PVDF) Epoxy
    • Siliconized Modified Polyester (SMP)
    • Urethane
    • Acrylic
    • Plastisol
  • Fluoropolymer (PVDF) Siliconized Modified Polyester (SMP) Polyester Different Resins Offer Different Performance Qualities Best Good Better
  • The Solvent
    • This is the vehicle by which the pigment is transported to the metal surface. Actually evaporates during the curing/baking process to permit the formation of a paint film.
    • Mainly used as a thinner
    • Totally volatile, leaves the film when baked
    Solvent
  • The Additives
    • Any number of chemicals added to the paint, usually in small amounts to bring special effects to the paint.
    • Flow
    • Cure
    • Air entrapment
    • Waxes
  • Functions of the Components Pigment Resin Solvent Additive Aesthetics Properties Application Enhancement Color Durability Stability Mar Resistance Gloss Adhesion Viscosity Curing Agent Adhesion Flexibility Compatibility Settling Film Strength Color Retention Film Control Dispersion Water Resistance Abrasion Adhesion Anti-Freeze Corrosion Resistance Impact Resistance Leveling De-Foaming
  • Cross-Section of Paint
  • How Coatings Fail
  • How Coatings Fail Polyester Urethane Polyester Urethane
  • How Coatings Fail Carbon-Fluorine Bond Is One of the Strongest in the Universe.
  • Polyester Paint Systems
    • A generic polymer coating with limited weathering performance.
    • Generally Using Organic Pigments.
      • End Uses:
        • Interior Applications
          • Home Appliances
          • Lighting Fixtures
          • Wall Panels
  • Siliconized Modified Polyester (SMP) Paint Systems
    • A generic coating type that represents a wide range of topcoats used on prepainted metal in construction.
    • The silicon extends the service life of the base polymer and improves weathering.
    • Generally Using Organic and Ceramic Pigments.
      • End Uses:
        • Metal Building Components.
        • Agricultural and Corrugated panels.
  • Polyvinylidene Fluoride (PVDF)
    • The resin, which is a fluoropolymer, that is used as the major vehicle (base resin) in the paint system.
    • Paint chemistry of 70% by weight of PVDF resin.
    • Exhibits superior
      • Color retention
      • Chalk resistance
      • Corrosion Resistance
      • Flexibility
      • Stain Resistance
      • Overall exterior durability
  • PVDF vs. Other Coatings
  • PVDF vs. Other Coatings
  • Weathering Properties
  • Physical Properties
  • Chemical Properties
  • What Causes Chalking?
    • Failure in the resin system causes chalking.
    • As the resin system breaks down, resin particles along with imbedded pigment particles lose adhesion and take on a white appearance.
    • Visual ratings are assigned according to ASTM D659.
    • Ratings ranges from 10 – 0, where 10 is best.
    • Failure in the pigment system causes color fading.
    • Fading is caused when substances in the environment attack the pigment portion of the paint and cause the color to change.
    • Color fade is expressed in calculated “Delta E” values or NBS units which are measured and calculated according to ASTM D2244.
    • Values range from 0 – Infinity, where 0 is best (no color change).
    What Causes Color Fading? Kynar 500 ® Kynar 500 ® Kynar 500 ® Acrylic Polyester Silicone Polyester
  • Chalk and Weather Resistance
    • These panels exposed at an independent test fence facility in Southern Florida clearly demonstrate the superior weatherability of PVDF.
  • Chalk and Weather Resistance Kynar 500 Yellow Polyester Powder Yellow Kynar 500 Blue Urethane Blue Kynar 500 Bronze Acrylic Bronze exposed 17 yrs. exposure 15 yrs. exposure 10 yrs. exposure unexposed exposed
  • Chalk and Weather Resistance 160 months 45˚ South Siliconized Modified Polyester unexposed exposed Control 20 months 51 months 110 months 160 months Exposure Panels
  • Chalk and Weather Resistance 160 months 45˚ South PVDF Based Coating unexposed exposed Control 20 months 51 months 110 months 160 months Exposure Panels