Dow Corning CI-2001 White Reflective Coating for Lighting applications. Kelvin Rong Irina Bolsacova

Transcription

1 Dow Corning CI-2001 White Reflective Coating for Lighting applications Kelvin Rong Irina Bolsacova

2 Dow Corning CI-2001 White Reflecting Coating Dow Corning CI-2001 is a highly reflective optical coating enhancing light output and efficiency with good resistance to environmental aging. It cures at room temperature to a tough, resilient and non-tacky surface PROVEN EFFICIENCY UL flammability rating recognized Advanced reflectivity compared to some paints and films Stable performance across lifetime exposed to T and UV DESIGN FLEXIBILITY Can be applied on large variety of substrates Can be applied on various shapes PROCESSABILITY Cures to a resilient, highly reflective surface Room temperature cure, no ovens required Mild heat acceleration (after solvent flash-off) can speed in-line processing Low viscosity enhances flow and fills in narrow gaps and spaces POTENTIAL APPLICATION: Reflector in Luminaries fixture Lightingboxes Mixing chambers Diffuse illumination over an extended area, Backlight Assemblies Coating on PCBs Integrating spheres Laser cavities Calibration targets Remote sensing Back panel display lighting Digital imaging, Scientific, film, video and photographic applications

3 Dow Corning CI-2001 PRODUCT: CI-2001 WHITE REFL COATING,CAN,0.5KG-CAN CI-2001 WHITE REFL COATING,KG,15KG-PAIL CI-2001 WHITE REFL COATING,KG,3.4KG-PAIL Manufacturing site: Auburn, USA Find additional information and application details:

4 CI-2001: How it works LED Output = Փ0 Reflector reflectance = η α percentage of light gets out of reflector directly Փd= Փ0 * α Reflected light: ՓR= Փ0*(1-α)* η Efficiency = [Փ0 * α + Փ0*(1-α)* η]/ Փ0 = [α + (1-α)* η]% Direct light Reflected light e.g. if 30% LED directly goes out, and reflectance of aluminum reflector is 82%, after applying CI coating, the reflectance of coated reflector is 96%. Thus, fixture efficiency is Before coating 87.4% After coating 97.2% The difference is bigger if 1) More light is controlled by reflector. 2) More optical elements in the system, such as lens, refractor etc.

5 Reflectance vs. thickness of material Reflectance (%) REFLECTANCE (%) Reflectance v.s. Thickness Wavelength (nm) CI mil CI mil CI mil Take away: With thicker the coating layer, CI-2001 provides higher reflectance. Reflectance v.s. Thickness WAVELENGTH (NM) CI mil CI mil CI mil 5

6 Thermal Aging at 150 C % Reflectivity C Thermal Aging Data 0 Hour 1000 Hour 2000 Hour 3000 Hour b* Values (yellowness): 0 hour hour hour hour Wavelength (nm) Take away: CI-2001 is stable to heat, it maintains high reflectance and non-yellowing after thermal aging.

7 Reflectance after UV aging (up to 1800hr) Reflectance (%) CI-2001 UV Aging b* Values (yellowness): 0 hour hour hour Hour 1000 hour 1800 hour Wavelength (nm) Take away: CI-2001 is stable to UV, it maintains high reflectance and non-yellowing after UV aging. 7

8 Good adhesion to common substrates Polycarbonate Take away: CI-2001 provides good adhesion, which is ISO Class:0/ASTM Class:5B, to common substrates. Aluminum PMMA

9 260degC 5min Aging (Reflow) Reflectance (%) Before Aging After Aging Before Aging After Aging Wavelength (nm) L*= a*= b*= 0.59 Competitor Materials

10 Reflectance (%) Competitive benchmark: 260degC 5min Aging Powder Coating L*= a*= 2.29 b*= Before Aging After Aging Wavelength (nm) Before Aging After Aging

11 Reflectance (%) Competitive benchmark: 260degC 5min Aging White Film L*= a*= b*= Before Aging After Aging Wavelength 550 (nm) Before Aging After Aging BACK

12 Dow Corning CI-2001 is UL V0 recognized

13 Dow Corning CI-2001 White reflecting Coating Material processing details and recommendations

14 Spray Coating Process Shake Down package Dilution (optional) Filtering Ready to spray

15 Possible equipment Hand spray PVA ref application bulletin that can be useful Keep it simple: costeffective manual spray coating for Printed-circuit board applications Dilution Coating

16 CI-2001 RELATIVELY VISCOSITY Dilution Dilution 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0% 5% 10% 15% 20% 25% 30% OS-20 ADD IN (%)

17 Dow Corning CI-2001 White reflecting Coating Process Recommendation

18 Step One Shake the container in the paint shaker. Three cycles and 3 minutes per cycle. After shaking, leave the container settled for 24 hours.

19 Step Two Fill coating into a right size container for spray coating. In following slides, we re using a quarter can with flat top for example. For the safety consideration, we recommend ground all containers. Carefully pour CI-2001 into quarter can.

20 Step Three This is optional. People can use solvent to adjust viscosity for their application. In this slide, we re using OS-20 as solvent to dilute CI Again, we suggest to grounding all containers.

21 Step Four After mixing CI-2001 with OS-20, gently blend materials.

22 Step Five Measure the viscosity of CI-2001 to make sure it s properly for application. Repeat step three to five if necessary. Multiple equipment can be used to measure viscosity, such as viscosmeter, Zahn-cup etc.

23 Step Six Gently pour diluted CI-2001 to spray gun cup through filter. Cover the lid without tighten and let material de-air for 10 to 15 min before spraying it.

24 Spray

25 dowcorning.com/lighting The information contained in this communication does not constitute an offer, does not give rise to binding obligations, and is subject to change without notice to you. The creation of binding obligations will occur only if an agreement is signed by authorized representatives of Dow Corning and your company. Any reference to competitor materials contained in this communication is not an endorsement of those materials by Dow Corning or an endorsement by the competitor of Dow Corning materials. To the fullest extent permitted by applicable law, Dow Corning disclaims any and all liability with respect to your use or reliance upon the information. DOW CORNING DOES NOT MAKE ANY WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, WITH RESPECT TO THE UTILITY OR COMPLETENESS OF THE INFORMATION AND DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. DOW CORNING DISCLAIMS LIABILITY FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.