“Paint Systems”

• Aluminum• Galvanized Steel

(HDG)• Galvalume

Paintable Substrates

• Provide protection• Add aesthetic appeal• Promote corporate

brand and increase recognition

• Decrease energy costs

Why Do We 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.

What is Paint?

• 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.

The Pigments

Different Pigments OfferDifferent Performance Properties

Inorganic – Ceramic

Earth Tone

Organic

Best

Good

Bette

r

• Polyester

Fluoropolymer (PVDF)

Epoxy

• Siliconized Modified Polyester (SMP)

• Urethane• Acrylic

• Plastisol

The ResinThe most important part of any paint system. The

liquid glue of the paint system that surrounds and protects the pigment particles.

Fluoropolymer (PVDF)

Siliconized Modified Polyester (SMP)

Polyester

Best

Good

Bette

r

Different Resins Offer Different Performance Qualities

The SolventThis 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

• Flow• Cure• Air entrapment• Waxes

The AdditivesAny number of chemicals added to the paint, usually in small amounts to bring special effects to the paint.

Functions of the ComponentsPigment 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

Cold Rolled Steel

Zinc (HDG) orZinc-Aluminum

(Galvalume®)

Substrate Pre-Treatment

Layer

Substrate Pre-Treatment

Layer

Primer(0.20 - 0.25

mils)

TRINAR®Topcoat

(0.70 - 0.90 mils)Primer

(0.20 - 0.25 mils)

Polyester Backer(0.30 - 0.50 mils)

Prepaint Cross-Section

Cross-Section of Paint

How Coatings Fail

Polyester Urethane

How Coatings Fail

Polyester Urethane

Carbon-Fluorine Bond Is One of the Strongest in the Universe.

How Coatings Fail

Polyester Paint Systems

A generic polymer coating with limited weathering performance.

Generally Using Organic Pigments. End Uses:

Interior ApplicationsHome AppliancesLighting FixturesWall 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?

Kynar500®

Kynar500®

Kynar500®

AcrylicPolyesterSiliconePolyester

Chalk and Weather Resistance

These panels exposed at an independent test fence facility in Southern Florida clearly demonstrate the superior weatherability of PVDF.

Kynar 500Yellow

PolyesterPowderYellow

Kynar 500Blue

UrethaneBlue

Kynar 500Bronze

AcrylicBronze

17 yrs. exposure

15 yrs. exposure

10 yrs. exposure

unexposed

exposed

Chalk and Weather Resistance

exposed

Chalk and Weather Resistance

160 months45˚ SouthSiliconized Modified Polyester

unexposed

exposed

Control 20 months 51 months 110 months 160 months

Exposure Panels

Chalk and Weather Resistance

160 months45˚ SouthPVDF Based Coating

unexposed

exposed

Control 20 months 51 months 110 months 160 months

Exposure Panels