Loading in 2 Seconds...
Loading in 2 Seconds...
“Aesthetics and Performance: FEVE Fluoropolymer Resins for Powder Coatings”. Bob Parker D+D Webinar April 25, 2013. FEVE Powder Resins. Outline: Overview of “FEVE” resin technology Determination of best properties for an FEVE powder coating resin
“Aesthetics and Performance: FEVE Fluoropolymer Resins for Powder Coatings” Bob Parker D+D Webinar April 25, 2013
FEVE Powder Resins Outline: • Overview of “FEVE” resin technology • Determination of best properties for an FEVE powder coating resin • Introduction of FEVE resin for powder coatings • Testing results of formulations made with FEVE powder resin • 2nd Generation FEVE Powder Coating Resin
FEVE Powder Resins What is an FEVE Fluoropolymer??? • A hybrid fluoropolymer resin with the ability to be used in standard coatings formulations like any other conventional coating resin • A high performance resin that can withstand severe ultraviolet light exposure 2-3 times longer than conventional coatings resins
FEVE Powder Resins FEVE Fluoropolymer Resins • “FEVE” is abbreviation for “Fluoroethylene Vinyl Ether” resins for coatings • Known for their high performance properties: • Exceptional resistance to UV degradation • Superior Chemical Resistance • Excellent Thermal Resistance - Known for their unique formulation properties: 1) Solvent soluble 2) Can be cured at ambient temperature with isocyanates 3) Can achieve high gloss formulations
Fluoroethylene Vinyl Ether (FEVE) Resins FLUORINATED SEGMENTS: Weatherability, durability, chemical resistance VINYL ETHER SEGMENTS: Gloss, solubility, crosslinking
FEVE Powder Resins Target Properties/Characteristics for an FEVE Powder Coating Resin
FEVE Powder Resins Test for Choosing the Best Tg for the FEVE Powder Resin: 1)Prepare powder coatings using several FEVE resins with different Tg properties 2) Place coatings in cylinders and apply 40 gm/cm² force. 3) Place cylinders in 40⁰ C. oven for 24 hours. 4) Check physical state of powder coatings.
FEVE Powder Resins Relationship of Tg of Resin and Blocking Properties of the Powder Coating
FEVE Powder Resins Connection between Cure System of FEVE Powder Resin and Shelf Life of Coatings Hydroxyl functionality is the best choice!
FEVE Powder Resins Common properties of 1st Generation FEVE Powder Resin
FEVE Powder Resins Typical Powder Coating Formulation Flow Promoter: Eliminates surface imperfections Benzoin: Eliminates pinholes caused by out-gassing
FEVE Powder Resins Typical Laboratory Manufacturing Procedure: • Add all ingredients together; premix with blade mixer • Extrusion of powder coating premix: a. twin screw extruder w/ 16 mm Bore size b. 250 RPM @ 120⁰C. • Grinding with Blade Mixer • Filtering of powder through 3 sieves → 180 micron 125 micron 90 micron
FEVE Powder Resins Effect of Different Catalysts on Gloss *1 – used 500 gram weight and ½” diameter ball *2 – ISO 2409 cross cut adhesion test *3 - visual check for degree of orange peel; 1=highest and 10=lowest CrelanUi: IPDI NCO adduct; E-Caprolactam blocked Crelan TPLS2147: IPDI NCO adduct; internally blocked Bismuth Octoate is best catalyst!
FEVE Powder Resins Advantages of FEVE Powder over Conventional Powder resins • Produces a hard film - higher than 2H pencil hardness • Has stronger Chemical Resistance to acids, bases, and solvents • Demonstrates significant anti-graffiti properties • Exceptional Weatherability properties • Highly Transparent film - translates to a high transmittance of a wide spectrum of light rays • Impact on application productivity - FEVE resin has least impact on comtamination
FEVE Powder Resins Anti-graffiti Performance Test: Application of marker for 24 hours; attempted removal with Xylene
FEVE Powder Resins QUV B313 Weatherometer Exposure
FEVE Powder Resins Xenon Arc Weatherometer Exposure
FEVE Powder Resins • Dipla Metal Weatherometer (DMW) • Manufactured by Kato, Inc., • which is based in Japan
FEVE Powder Resins Dipla Metal Weatherometer
FEVE Powder Resins Exterior 10 year exposure: • Test type : Inland weathering • Test location : Miami , Florida (26°N) • Exposure period : 11/30/2000 – 11/22/2010 • Type of test : 45°Direct Global • Radiant energy : Total: 62,281 MJ/m2(total) ; 1,488,552 Langleys • UV : 2,863 MJ/m2(295-385nm)
FEVE Powder Resins Exterior 10 year exposure: • Powder Resin : Lumiflon LF710F • Hardener : Crelan VP LS2256 / Bayer • Color : Brown Exposed Powder Coating Formulation: Results of Exposure: 60⁰ Gloss retention (%): 60.3 Color Change (ΔE): 2.3
FEVE Powder Resins 2nd generation FEVE powder resin: • Introduced 3 years ago • Improved flow and leveling vs. 1st generation FEVE resin • Improved impact resistance and flexibility vs. 1st generation FEVE resin • Comparable to 1st generation FEVE resin in terms of hydroxyl functionality and Tg
FEVE Powder Resins Summary: FEVE powder coating resins demonstrate exceptional resistance to UV degradation when used in powder coating formulations. while exhibiting the standard physical properties necessary for manufacturing a stable and easily applied powder coating formulation.