Gentoo Coatings produces transparent, abrasion resistant, and hydrophobic coatings. The coatings are applied as a simple coating and provide excellent transparency while improving abrasion resistance and weatherability. Test results showed the Gentoo coating maintained its hydrophobic and transparent properties after abrasion testing and UV exposure. In contrast, commercial coatings flaked off and lost their properties during the same tests. The Gentoo coating also protected underlying substrates and maintained its flexible properties.

1. Gentoo Coatings
Clear, Super-Abrasion Resistant, Smudge-
Proof, Self-Cleaning Hydrophobic Coatings
4/28/2015

3. Transparent fluid resistant coatings
Goal of Research
Produce durable transparent coatings with very low surface energy and excellent
abrasion resistance
Technical Approach
-Tailored self assembled surface morphology
-Surface active moieties low surface energy
-Tough, flexible, transparent sol gel binder
-Abrasion resistant ceramic nanoparticles
Advantages
- Simple coating application
- Excellent transparency, low haze
- Excellent abrasion resistance and weatherability
- Long lasting durable coatings with little to no maintenance
- High hardness and toughness for high speed rain and hail erosion
resistance
Transparent, abrasion resistant, hydrophobic
self- cleaning coatings

4. Hydrophobic properties and transparency
Gentoo leaves no trail of water, whereas all uncoated substrates leave a significant trail
Contact angle Watershedding
(120 µl)
Watershedding (50
µl)
Acrylic 68° 18° 21°
Polycarbonate 77° 14° 13°
Polyurethane 99° 15° 26°
Gentoo 115-117° 2-4° 3-6°

5. Transparent and Low Haze
Minimal change in transparency or haze on different substrates
Transparency Haze
Bare acrylic 94.0 0.69
Gentoo on acrylic 94.0 0.4
Bare glass 94.0 0.9
Gentoo on glass 94.1 1.3

6. Stability in UV Light
50
60
70
80
90
400 450 500 550 600
Wavelength (nm)
650 700 750 800
Bare acrylic
Gentoo on acrylic
- QUV testing – 500 hour exposure
100
Water Contact
Angle
Transparency Haze Clarity
Before QUV 117° 95.0 1.1 99.3
After QUV 500 hours 117° 94.0 0.6 99.8

7. Appearance after Abrasion
(Glass)
Bare Commercial 2
Glass As cast
Abraded
Gentoo Commercial 1
As cast Abraded As cast Abraded
Gentoo is virtually unaltered by abrasion, whereas Commercial coatings flake off and turn opaque
Abraded with 150 cycles with 316 Steel wool compared with commercial
superhydrophobic

8. Appearance after Abrasion
(Nitronic)
Coating
easily
removed
Coating
completely
removed
No change in
coating
Bare Commercial 2
Steel As cast
Abraded
Gentoo Commercial 1
As cast Abraded As cast Abraded
Abraded with 150 cycles with 316 Steel wool compared with commercial
superhydrophobic

9. Oscillating Sand Abrasion (Bayer) Resistance
0 Strokes 600 Strokes 2000 Strokes
Transparency, haze or clarity of Gentoo was not affected by the
oscillating sand abrasion test

10. Water repellency after abrasion
Coupons abraded with Scotch Brite compared with commercial
Superhydrophobic
Gentoo – Dry
Gentoo – Seawater
Commercial Superhydrophobic – Dry Commercial Superhydrophobic - Seawater

11. Transmittance after abrasion
Coupons abraded with Scotch Brite compared with commercial
Superhydrophobic Gentoo – Dry Gentoo –
Seawater Commercial 1
– Dry
Commercial 1 - Seawater
Gentoo
Commercial
Superhydrophobi
c

12. Solvent Resistance
Exposed for 30 min, 48
hours
Solvent Specification
Mild soap 20 vol. % in water
Salt water 5 wt. %
IPA 50 vol. %
IPA 90 vol.%
Naptha ---
Heptane ---
Jet fuel JP8
Deicing fluid 100% Propylene glycol
Hydraulic fluid Mil-H-83282
Hydraulic fluid Mil-H-05606
Lubricant Mil-L-23699
Lubricant Mil-L-7808
Lubricant DOD-L-85734
Polyalphaolefin coolant Mil-PRF-87252C
Navy plastic polish P-P-560, Type 1
Airplane wash cleaner fluid Mil-C-8514
Alodine 1201 wash and rinse Mil-DTL-81706

13. Effect of Solvent on Contact Angle

14. Protects substrate from abrasion
16
- Taber abrasion testing - ASTM D4060 (500 g / 500 cycles)
Untreated AcrylicGentoo Coated Acrylic
After abrasion (500 cycles)
Substrate Transparency Haze
Untreated
Polyurethane
89.2 18.8
Gentoo Coated
Polyurethane
90.6 5.9
Untreated Acrylic 93.3 29.4
Gentoo Coated
Acrylic
93.8 4.2

15. Flexible
17
Bends around 1/8” mandrel without cracking or
delamination

16. Coating on headlights
18
- ‘Repairs’ scratches and other damages on surface
- Sheds water and oil well
- Self / Easy cleaning performance
- 6 month testing – unchanged from initial application

17. Coated F16 Aft Canopies
19
- Produced approx. 2.5 gallons of our coating solution
- Coated Two F-16 aft canopies
- Process produced high-quality coatings with no visual defects

18. THANKS