Tokyo Ohka Kogyo Product Site
Super Hydrophilic Coating Materials
Coating Materials for Long-Lasting Super Hydrophilic Modification of Substrate Surfaces
We at Tokyo Ohka Kogyo have developed a range of hydrophilic coating materials that can transform glass, metal, plastic and other substrates into hydrophilic surfaces.
Our hydrophilic coating materials have unique features such as long-lasting hydrophilic properties, nanoscale ultra-thin films, simple application process and high durability, which combine with the general functions of hydrophilic materials* to respond to our customers' needs. (*Lubricity, anti-fouling, quick-drying, anti-condensation, anti-bubble, improvement in capillary strength, etc.)
These materials can be used for a wide range of applications, from macro applications such as auto parts, construction materials, glasses and goggles to micro applications such as electronic components such as sensors.
We also offer polydimethylsiloxane (PDMS), which is extremely low in cytotoxicity and difficult to maintain hydrophilicity for a long time, making it suitable for use in the bio and life science fields.
Super Hydrophilic Coating Materials
Super Hydrophilic Coating Material for Surface Modification of Various Substrates Without Pretreatment and in a Simple Process
| Glass | SUS430 | PET | PP | COP | |
|---|---|---|---|---|---|
| No Treatment |  41.9ﾟ |
 90.3ﾟ |
 74.4ﾟ |
 106.8ﾟ |
 83.2ﾟ |
| After Coating Treatment |  3.2ﾟ |
 10.8ﾟ |
 7.1ﾟ |
 8.6ﾟ |
 7.1ﾟ |
Suitable Substrates
- Plastic Materials
(PET、PS、PMMA、PP、COC、COP) - Glass
- Si Wafer
- SUS etc.
Features
- Can be applied to a variety of substrates without pretreatment
- Excellent optical properties with 99% or higher visible light transmittance
- Nanoscale thin film (< 2nm)
- Extremely low cytotoxicity*
- Excellent weather and chemical resistance
*In compliance with ISO 10993-5 IC50 (50% inhibitory concentration): >100%
Method
Intended Use Case
- Life Sciences
(Microfluidics, Etc.) - Optical Equipment, Etc.
Reference Data
Non-Adhesive Property to Cells
Evaluation Conditions
| 24 Well Plate; Culture Medium | DMEM (10% FBS, 1% antibiotic added) |
|---|---|
| Seeding Density | 3.3 x 104 cells/well |
| Observation | After 5hr of seeding (37℃, 5% CO2) |
NHDF (Normal Human Dermal Fibroblasts)
HepG2 (Human Hepatoma-Derived Cell Line)
Super Hydrophilic Coating Materials With Enhanced Durability
Coating Material That Creates a Hydrophilic Film on Glass or Oxide Film Upon Contact
Suitable Substrates
- Glass
- Plastic Materials
（PDMS、PC、PET、PP、COP）Etc.
Features
- No drying process
- Nanoscale Film (< 2nm)
- Excellent abrasion resistance
- Excellent light resistance and chemical resistance
- Excellent optical properties with 99% or higher visible light transmittance
- Excellent resistance to environmental contaminants
Coating Method
- For glass and oxides: super hydrophilic film formation by contact
- For plastics: requires pretreatment (plasma, VUV, corona, etc.)
Intended Use Case
- Lens for Glasses
- Goggles
- Indoor, Outdoor Use, Etc
Reference Data
Anti-Fogging Properties
- Substrate：Glass
- Initial Contact Angle：10℃ or less
- Test Condition：Observed the degree of fogging by exposing to 80℃ steam
- Test Result：No fogging for more than 1min
Long-Lasting Hydrophilic Surface
Even on PDMS
- Substrate：PDMS(polydimethylsiloxane）
- Treatment Conditions：plasma → coating → drying → rinse
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