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“Paint Systems”

“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?.

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“Paint Systems”

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  1. “Paint Systems”

  2. Paintable Substrates • Aluminum • Galvanized Steel (HDG) • Galvalume

  3. Why Do We Paint? • Provide protection • Add aesthetic appeal • Promote corporate brand and increase recognition • Decrease energy costs

  4. 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.

  5. The 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. • Ceramic Pigments • Earth Tone Pigments • Organic Pigments

  6. Best Better Good Different Pigments OfferDifferent Performance Properties Inorganic – Ceramic Earth Tone Organic

  7. Fluoropolymer (PVDF) • Siliconized Modified Polyester (SMP) • Polyester • Plastisol Epoxy • Urethane • Acrylic The Resin The most important part of any paint system. The liquid glue of the paint system that surrounds and protects the pigment particles.

  8. Best Better Good Different Resins Offer Different Performance Qualities Fluoropolymer (PVDF) Siliconized Modified Polyester (SMP) Polyester

  9. 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

  10. 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

  11. Functions of the Components

  12. Cross-Section of Paint

  13. How Coatings Fail

  14. How Coatings Fail Polyester Urethane Polyester Urethane

  15. How Coatings Fail Carbon-Fluorine Bond Is One of the Strongest in the Universe.

  16. 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

  17. 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.

  18. 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

  19. PVDF vs. Other Coatings

  20. PVDF vs. Other Coatings

  21. Weathering Properties

  22. Physical Properties

  23. Chemical Properties

  24. 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.

  25. Kynar 500® Silicone Polyester Kynar 500® Polyester Acrylic Kynar 500® What Causes Color Fading? • 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).

  26. Chalk and Weather Resistance • These panels exposed at an independent test fence facility in Southern Florida clearly demonstrate the superior weatherability of PVDF.

  27. unexposed exposed 10 yrs. exposure 15 yrs. exposure 17 yrs. exposure Chalk and Weather Resistance Polyester Powder Yellow Kynar 500 Blue Urethane Blue Kynar 500 Bronze Acrylic Bronze Kynar 500 Yellow exposed

  28. Chalk and Weather Resistance Siliconized Modified Polyester 45˚ South 160 months unexposed exposed Exposure Panels Control 20 months 51 months 110 months 160 months

  29. Chalk and Weather Resistance PVDF Based Coating 45˚ South 160 months unexposed exposed Control Exposure Panels 20 months 51 months 110 months 160 months

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