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.
Earth Tone 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 most important part of any paint system. The liquid glue of the paint system that surrounds and protects the pigment particles.
Fluoropolymer (PVDF) Epoxy
Siliconized Modified Polyester (SMP)
Fluoropolymer (PVDF) Siliconized Modified Polyester (SMP) Polyester Different Resins Offer Different Performance Qualities Best Good Better
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
Any number of chemicals added to the paint, usually in small amounts to bring special effects to the paint.
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.
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.
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.
Overall exterior durability
PVDF vs. Other Coatings
PVDF vs. Other Coatings
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.