Under development material
Chemical resistant coating and sealing material
Fluoro Sealant (under development)
"Fluoro Sealant", developed by Daikin, is a chemical resistant coating and sealing material, as well as an excellent water vapor barrier. A fully cured Fluoro Sealant functional film not only is an effective water vapor barrier with excellent chemical resistance, but also is capable of withstanding high voltages. Our Fluoro Sealant can be applied over a range of viscosities by a variety of techniques. Fluoro Sealant curing is initiated by exposure to moisture. It can be cured at room temperature and accelerated by heat. UV-cured formulations are additionally available. Please feel free to contact us for any questions or sample requests.
1. What is Fluoro Sealant?
2. Features of Fluoro Sealant
(1) Chemical resistance
Fluoro Sealant has excellent resistance to many organic solvents and some acids. After immersion testing, a silicone resin decomposed in several test chemicals or significantly absorbed the chemicals. In contrast Fluoro Sealant showed minimal weight change, indicating that it neither significantly decomposed nor significantly absorbed chemicals.
Table.1 Solvent absorption test
Test condition
- After curing a sealant film on a glass substrate, the coated glass was submerged in each of the above chemicals for 1 week at 25℃. Then absorption rate is calculated from the film weight before and after immersion.
Figure.1 Before and after toluene immersion test
Table.2 Swelling resistance to daily use chemicals
Test condition
- After curing a sealant film on a glass substrate, the coated glass was submerged in each of the above chemicals for 3 days at 65℃/90RH%. Then absorption rate is calculated from the film weight before and after immersion.
- Sunscreen: Neutrogena ultra sheer SPF70
- Hand lotion: Nivea cream
- Dish soap: Dawn ultra
(2) Coating characteristics
Fluoro Sealant is solvent-free liquid that can be coated not only on flat surfaces, but also on a variety of shapes such as edges and gaps. In addition, since it does not contain solvents, Fluoro Sealant has a low environmental impact and does not significantly shrink due to solvent volatilization.Figure.2 Coating methods
(3) Electrical insulation properties
Fluoro Sealant has a higher breakdown voltage than silicone resin and has outstanding performance as an insulating film.Table.3 Electrical characteristics
(breakdown voltage, volume resistivity)
Test condition
- Breakdown voltage: compliant with JIS C2110-1975
- Volume resistivity: applied voltage: 10V
- Boost voltage: 10KV/16sec
- Film thickness: 0.2mm
(4) Low water vapor permeability
Fluoro Sealant, even as a thin film, is excellent water vapor barrier compared to silicone resin and epoxy resin.
Table.4 Water vapor permeability
Test condition
- Cup method JIS Z 0208
(5) Low temperature behavior
Fluoro Sealant is resistant to cold temperatures and exhibits stable elastic properties over a wide temperature range.
Table.5 Cold-resistant limit temperature
* Tg + 10 °C is defined as the cold-resistant limit temperature.
(6) Additional attributes (representative values)
Viscosity and mechanical properties vary depending on the grade, please contact us if you have any requests.Table.6 Additional attributes