0. “Aesthetics and Performance: FEVE Fluoropolymer Resins for Powder Coatings”
Bob Parker
D+D Webinar
April 25, 2013

1. Outline: FEVE Powder Resins 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

2. What is an FEVE Fluoropolymer???
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

3. FEVE Fluoropolymer 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

4. Fluoroethylene Vinyl Ether (FEVE) Resins
FLUORINATED SEGMENTS: Weatherability, durability, chemical resistance
VINYL ETHER SEGMENTS: Gloss, solubility, crosslinking

5. Target Properties/Characteristics for an FEVE Powder Coating Resin
FEVE Powder Resins
Target Properties/Characteristics for an FEVE Powder Coating Resin
Properties
Characteristics
Melting Point
Can Simplify Extrusion of the Powder Coating Formulation During Manufacture
Tg (Glass Transition Temperature)
Important in the Retention of Powder Properties when in Storage
Type of Crosslinkable Functional Group
Can affect the Shelf Life of the Powder Coating
Degree of Functionality
Affects Film Performance

6. Test for Choosing the Best Tg for the
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.

7. Physical State of the Powder Coating
FEVE Powder Resins
Relationship of Tg of Resin and Blocking Properties of the Powder Coating
Tg of Powder Resin (⁰C.)
Physical State of the Powder Coating 40
Fused Hard Lump 45
Fused Hard Lump 50
Fused Soft Lump 55
Retained Powder State

8. Hardener for Crosslinking
FEVE Powder Resins
Connection between Cure System of FEVE Powder Resin and Shelf Life of Coatings
Functional Group
Hardener for Crosslinking
Shelf Life
Hydroxyl (-OH)
Isocyanate, Melamine
2 years
Carboxyl (-COOH)
Epoxy, triglycidyl isocyanurate
1-1.5 years
Glycidyl (epoxide ring)
Amine, acid
3 months
Hydroxyl functionality is the best choice!

9. Common properties of 1st Generation FEVE Powder Resin
FEVE Powder Resins
Common properties of 1st Generation FEVE Powder Resin

10. Typical Powder Coating Formulation
FEVE Powder Resins
Typical Powder Coating Formulation
Flow Promoter: Eliminates surface imperfections
Benzoin: Eliminates pinholes caused by out-gassing

11. Typical Laboratory Manufacturing Procedure:
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 ⁰C.
Grinding with Blade Mixer
Filtering of powder through 3 sieves → 180 micron
125 micron
90 micron

12. 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
Crelan Ui: IPDI NCO adduct; E-Caprolactam blocked
Crelan TPLS2147: IPDI NCO adduct; internally blocked
Bismuth Octoate is best catalyst!

13. Advantages of FEVE Powder over Conventional Powder resins
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

14. FEVE Powder Resins Anti-graffiti Performance
Test: Application of marker for 24 hours; attempted removal with Xylene

15. FEVE Powder Resins
QUV B313 Weatherometer Exposure

16. FEVE Powder Resins
Xenon Arc Weatherometer Exposure

17. FEVE Powder Resins Dipla Metal Weatherometer (DMW)
Manufactured by Kato, Inc.,
which is based in Japan

18. Dipla Metal Weatherometer
FEVE Powder Resins
Dipla Metal Weatherometer

19. Exterior 10 year exposure:
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( nm)

20. Exposed Powder Coating Formulation:
FEVE Powder Resins
Exterior 10 year exposure:
Exposed Powder Coating Formulation:
Powder Resin : Lumiflon LF710F
Hardener : Crelan VP LS2256 / Bayer
Color : Brown
Results of Exposure:
60⁰ Gloss retention (%): 60.3
Color Change (ΔE): 2.3

21. 2nd generation FEVE powder resin:
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

22. FEVE Powder Resins PROPERTIES 1st generation FEVE resin 2nd generation
Film Thickness (microns)
50-70
20⁰ Gloss 50 51
60⁰ Gloss 80 78
Leveling (PCI Standard)
6-7.5
Gloss retention after 6000 hours (QUV-B313 exposure)
87%
84%
Mandrel Bend (mm)
>8 3
Direct Impact (inch-lbs) 15 30
Reverse Impact (inch-lbs) 10 25
Cross-cut Adhesion (ISO 2409)

23. 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.