advanced clear hydrophobic coating - powdertech
TRANSCRIPT
ADVANCED CLEAR HYDROPHOBIC COATING
• Named after a penguin
• Clear
• Durable
• Abrasion/chemical resistant
• Hydrophobic
• Oleophobic
What is Gentoo?
• Performance and characteristics that have not been available
before
• Developed under an Small Business Innovation Research (SBIR)
program
• Developed as a coating for the canopies of F-16 fighter jets
• Anti-corrosion for landing gear and stainless steel cables for the
Navy
What makes it different?
• Easy-clean and self-cleaning properties
• Anti-smudge/fingerprint
• Anti-graffiti and anti-paint/ink markers
• Excellent anti-corrosion properties
• Enhanced ice-removal benefits due to low adhesion
Why is it better?
Value of the Innovation
• Military SBIR work done by Luna Innovations and
Luna is the patent holder. Patents pending.
• Worldwide exclusive license granted to UltraTech
International, Inc.
• Technology is being incubated by UltraTech’s
Advanced Technology Group (ATG) for
commercialization by August 2016.
Technical Information – General
• Hydrophobic
• Excellent adhesion
• Abrasion resistance
• Corrosion resistance
Technical Information – Water/Mud shedding
Technical Information - Durability
Combination of hard component with flexible linkers
produce high toughness for abrasion resistance and
durability
Flexible componentSynthesized, Flexibility, Adhesion
Hydrophobic
additiveBound into coating - Durable
ToughDurability, Abrasion Resistant
Technical Information – Low Sliding Angle
Contact angle Watershedding
(120 µl)
Watershedding
(50µl)
Steel 63° >45° >45°
Aluminum 60° >45° >45°
Polyurethane (MIL PRF 85285) 95° 15° 30°
GentooTM 110-117° 3-5° 7-11°
GentooControl
Technical Information - Flexibility
Coating on Al Panel - bends around
1/8” mandrel without cracking or
delamination
Gentoo Coating
½” mandrel at 52 oC
Technical Information - Durability
Transparency Haze
Bare acrylic 94.0 0.69
Gentoo coating on acrylic 94.0 0.4
Bare glass 94.0 0.9
Gentoo coating on glass 94.1 0.2
Minimal change in transparency or haze on different substrates
Technical Information - Abrasion
Abraded with 150 cycles with 316 steel wool compared with
commercial superhydrophobic
Gentoo is virtually unaltered by abrasion
Bare
Glass
Gentoo
As cast Abraded
Commercial 1
As cast Abraded
Commercial 2
As cast Abraded
Technical Information – Ice Adhesion -15°C
Surface Ice Adhesion (KPa)
MIL PRF 85285 on steel 641
Gentoo coating on MIL PRF 85285 305
Gentoo coating on steel 130
Gentoo coating significantly decreases ice adhesion,
lowering time/cost of de-icing operations
Technical Information – Anti-Graffiti/Paint
Untreated vs. Gentoo
Corrosion – Electrochemical Impedance Spectroscopy
The initial (dry) sample shows that Gentoo is not significantly better then the
current polyurethane coating (likely because it is much thinner it does not impact
electrical penetration). However, after it is wet (immersed or salt fog) the
impedance (related to electrical resistance) is much higher, showing the rate of
corrosion is expected to be better for Gentoo then for regular paints.
PU Topcoat + Gentoo (dry)
PU Topcoat + Gentoo (336 hrs)
PU Topcoat (dry)
PU Top coat (336 hrs)
Corrosion – Electrochemical Impedance Spectroscopy
• EIS – used to evaluate the barrier properties of the coatings
• Substrate - Aluminum alloy 2024-T4 treated with MIL PRF 85285
polyurethane (1 mil)
• Tested initially and after 336 hours immersion in salt fog
PU Topcoat + Gentoo (dry)
PU Topcoat + Gentoo (336 hrs)
PU Topcoat (dry)
PU Top coat (336 hrs)
Corrosion – ASTM G48-11 Crevice Corrosion
• Stainless steel coupons
• Two PTFE crevice washers
• Cut scribes to represent
damage
Corrosion – Galvanic Fastener
Salt fog for 1340 hours
• Applying Gentoo on top of traditional anti-corrosion surfaces further
enhances the corrosion resistance of the material.
Technical Information - Gentoo
Hydrophobicity and
Watershedding
Coating exhibits > 110°contact angle and <5° watershed angle.
Corrosion Protection Dense network provides a high physical barrier to electrolytes
that cause corrosion; insulating for electronic barrier for
galvanic corrosion
Adhesion The coating has robust adhesion to glass, plastic (acrylic,
polycarbonate), paint (polyurethane, latex, acrylic), and metallic
(aluminum, steel, etc.) substrates.
Flexibility, Abrasion
Resistance
The polymer coating exhibits excellent flexibility via a tough,
crosslinked polymer matrix and abrasion/wear resistance.
Thickness/Weight The coating is very thin (4-6 µm) and lightweight
Environmental
Durability
Coating shows excellent resistance to degradation from salt
spray and UV exposure.
Applications
• Anti-Corrosion – cables, equipment, landing
gear, electronics, hardware, fasteners, etc.
• Easy-Clean/Self-Cleaning – Industrial
quality clear coat trucks, equip., solar
panels, trains.
• Low Ice Adhesion - Wind turbine blades,
power lines, satellite dishes, topside of
boats, radar…
Applications - continued
• Lenses and Glass
• Anti-Graffiti
• Anti-Paint
• Anti-Smudge
• Anti-Friction
What’s Available?
PART # DESCRIPTION
4700 Gentoo - Quart Kit (Part A and B)
4702 Gentoo - 5-gallon (Part A)
4703 Gentoo - 5-gallon (Part B)
4705 Gentoo - 50-gallon (Part A)
4706 Gentoo - 50-gallon (Part B)
4105 PPE Kit - Respirator, Gloves, Goggles
4710Gentoo Demo Kit (Two aluminum samples, squirt bottle and
plastic bin)
Thank You!