Okamoto Glass Co. Ltd. UV479

Identification & Functionality

Product Type

Coating

Technologies

Ready-to-Use Products

Product Families

Ready-to-Use Products — Paints & Coatings

Other Paints & Coatings

Features & Benefits

Ready-to-Use Product Features

Good Weather Fastness,

High Durability,

High Reflectivity,

High Temperature Resistance,

Temperature Resistance,

UV Resistant

Superiority

• In the UV-C band region (250 to 280 nm), about twice as high reflectance as
  aluminum substrate (UV479: 95.6% / Aluminum substrate : 49.3%)
• High durability allows operation even at high output
• Our products enable customers to apply for complexity in shape.

Applications & Uses

Markets

Consumer Goods,

Electrical & Electronics,

Healthcare & Pharma,

Industrial,

Paints & Coatings,

Printing & Packaging

Applications

Consumer Goods — Appliances & Electronics

Industrial — Leather & Textiles

Textile Manufacturing

Healthcare & Pharma — Medical

Medical Devices & Assemblies

Paints & Coatings — Other Paints & Coatings Applications

Printing & Packaging — Other Printing & Packaging Applications

Electrical & Electronics — Parts & Components

Semiconductor Manufacturing

Printing & Packaging — Printing & Inks

Screen Printing

Application Method

Lithography,

Offset,

Spray

Cure Method

Heat Cure

Plastics & Elastomers End Uses

Textile Applications

Applications

• LED COB UV reflection coat
• Medical equipment, home appliance with UV sterilization unit
• Air cleaner with UV sterilization unit

Typical Use

• Highly reflective COB / SMD substrate
• Higher output of UV sterilization / disinfection equipment

Properties

Color

White

Typical Properties

	Value	Units	Test Method / Conditions
Adhesives	Al / SUS	—	—
Breakdown Voltage (Thickness 47μm on Al)	3.2	KV	10sec / Electrode distance 20mm
Coating Method	Screen printing	—	—
Coating Method	Spray	—	—
Insulation Resistance (Thickness 47μm on Al)	1.7×10^9	Ω	500V / 10sec / Electrode distance 20mm
Reflection (at 265nm, Thickness 30μm or more)	min. 90	%	Reflectance is relative comparison with Spectralon® (Porous PTFE)
Viscosity (at 10 rpm, Screen printing)	10 - 70	Pa.s	Viscosity can be adjusted by the customer coating conditions.
Viscosity (at 10 rpm, Spray)	10 - 30	Pa.s	Viscosity can be adjusted by the customer coating conditions.

Technical Details & Test Data

Technical Information

• UV sterilization is expected as the valuable technology to disinfect bacterial, virus thereat around us.
• High efficient reflection coating for UV wavelength 250～400nm.
• Thermal curing ink (main + agent) for screen printing, also we can provide printing service too.
• Reflection UV479 : min. 90% @265nm
• Endurance:
  Thermal R change within <5% at 200℃/2000hours
  High temp & humidity R change within <5% at 60℃-90%/2000hours
  UV resistance R change within <5% at 26mW/cm², 270nm/2000hours

Reflectance

 

Thickness Dependence

Substrate Dependence

Comparison of Reflection Characteristics in UV-C Area

UV Durability Test Result

Durability Evaluation Example

Test item	Test condition	Result
Heat resistance test	200°C ×1,000 hours	No decrease in reflectance more than 5%
Constant temperature and humidity test	60°C/90% ×1,000 hours
Cycle test	25°C↔260°C 10 cycles	No peeling or discoloration

Mixing and Curing Conditions

Mixing ratio	Material	Concentration
	Main material (UV479)	100wt%
	Curing material (OG840)	2.0wt%

Note: Adjust the viscosity with diluent if necessary.

Curing	Process	Apparatus	Temperature	Retention time
	Drying	Box oven / Belt dryer	90°C	10 min.
	Curing		180°C	180 min.

Note: The dryer should be well ventilated.
Make sure that the surface is sufficiently dry
when you touch it with your finger.
Please cure until you feel it.

High Temperature Resistance

Holding Temperature : 200°C

Weatherability

Holding Condition : 60°C 90%RH

UV-C resistance

Irradiation Condition: 26mW/cm2@270nm

Adhesive

• Cross Cut Test before and after Thermal shock test
• Thermal shock test condition : 260°C→25°C water × 10times

	UV479 before/after
Al	0/0
Cu
SUS	0/0

Recommended Blending Conditions

Blending condition

Blend Ratio

• Main Body : UV479 = 100 wt%
• Curing Agent OG840 for UV479 = 2.0 wt%

1. Pick Main Body up from the refrigerator
2. And Keep it in the room and store until main body up to room temperature (>6 Hours) as unopened (Avoid Dew condensation)
3. Curing Agent solution should NOT be in the refrigerator.

Thinner

• In case it need to adjust viscosity

Storage condition

• Main Body : OG461, UV478, UV479) = 5°C (Refrigerated storage below 5°C)
  Shelf Life: 3 Months after manufacturing
• Curing Agent : OG830, OG831, OG840 = Room Temperature
  Shelf Life : 6 Months after manufacturing

Recommended Curing Conditions

Drying Condition

• 90°C for 10 min in the Box Oven or Equivalent Heat amount of Belt dryer

Curing Condition

• UV479 : 180°C for 120~180 min(minimum) in the Box Oven or Equivalent Heat amount of Belt dryer
• Feel dry surface by the finger touch is good enough in the above condition