Smart coating roadshow - 30 September 2016 Invisible but functional - water resistent coatings

1. Invisible but Functional
Protective water-resistant nanocoatings
Smart Coating Application Lab
27/10/2016 1© sirris | www.sirris.be | info@sirris.be |

2. Effect of water
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3. Water-resistant or Water-proof?
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 Waterproof: impervious to water
 Water-resistant: able to resist the penetration of
water to some degree but not entirely
 Water-repellent: not easily penetrated by water
No clear definition of water-resistance.
Electronics: IP rating (2 digit number)
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4. Water-resistant or water proof?
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© sirris | www.sirris.be | info@sirris.be |
www.liquiproof.co.uk/
www.techsnapr.com
www.ultimateears.com

5. Choice of coating?
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Application
Durability
Type of material
Degree of protection
Appearance Cost

6. State-of-art
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Conventional application Plasma deposited
Spray, brush, roller Plasma
Wet proces Dry vacuum proces (gas)
Nanometer to micrometer
(mostly invisible)
1 – 100 nm (Invisible)
Batch process or inline
Building materials, glass, metals Electronics, textile, medical

7. Conventional coatings
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• Water repellent
• Low surface free energy (PTFE, silicon)
• Non polar groups
• Coatings based on nanotechnology
=> nano coatings
 Silicon chemistry
 (Hybrid) Sol-gel nano composites
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8. Nano technology
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Hydrophobic impregnations
Hybrid (sol-gel) composites
Super hydrophobic coatings
Impregnations
Inorganic - organic
Lotus effect

9. Hydrophobic impregnations
• Silicone chemistry
• Often blends with
fluorinated polymers
• Variations in formulation on
different materials
• Porous surfaces
27/10/2016 9© sirris | www.sirris.be | info@sirris.be |
Source: sika.com

10. Hybrid nano composites
• Hybrid = combination of organic and inorganic
• A lot of possibilities in functionalities
• Water resistant –> easy-to-clean
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11. Super hydrophobic coatings
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• Combination of hydrophobic groups and surface
roughness, similar to lotus leaf.
• Very high water contact angle => High water repellency
Challenges: Often visible, lack durability
Suppliers: Never wet, ultra ever dry, hydrobead, Pee Back
© sirris | www.sirris.be | info@sirris.be |

12. Plasma deposited coatings
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• (Pulsed) plasma
• Dry process
• Gas phase – deep penetration –
- thin coatings (filters)
• No additional curing step
• Used frequently in electronics,
textile treatment and medical
© sirris | www.sirris.be | info@sirris.be |
www.plasmatreatment.co.uk

13. Industry standard testing
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Humidity testing
Immersion testing
Water protection (IPX standard)
Water penetration test (Karsten Tube)
Water vapor Transmission rate
Chemical resistance
Corrosion resistance
Salt fog testing
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14. Case Nanex Company
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• 3 product lines: different technologies and
market focus.
 Always dry: water repellent coatings
 Cleaners: nano protective cleaners
 Car coating
Nanex is working together with Sirris to improve
their formulations.
© sirris | www.sirris.be | info@sirris.be |

15. Case: Coating development
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Main goal: To improve water-repellent products.
• Focus on improving the durability
• Introduction of new functionalities
• Combination of technologies
 Introduction of nano-particles
 Proper evaluation by correct testing
© sirris | www.sirris.be | info@sirris.be |

16. Overview & Conclusions
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• Many suppliers of protective water-resistent
coatings
• Amount of protection is related to many factors
• Miscommunication exists on water-repellancy
• Durability is an issue (wear, UV protection)
• Major interest in water-protective coatings &
technologies. => Future developments!
© sirris | www.sirris.be | info@sirris.be |

17. 27/10/2016© sirris | www.sirris.be | info@sirris.be |
http://www.sirris.be
#sirris
http://www.linkedin.com/company/sirris
http://techniline.sirris.be