ARALDITE® 12118 A/B

ARALDITE® 12118 A/B is a two-component, low-viscosity epoxy resin casting system. Transparent after curing, it offers good UV and crack resistance for optoelectronic devices, especially for tip light-emitting diodes (LEDs).

RTU Product Type: Casting Resin

Product End Uses: Light Emitting Diode (LED), Optoelectronics Devices

Chemical Family: Epoxy & Epoxy Derivatives

Composites Processing Methods: Casting, Encapsulation

Features: Cost Effective, Enhanced Yields, Excellent Crack Resistance, Good Balance Of Clarity, Good UV Resistance, High Clarity, Low Viscosity, UV Resistant

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Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Features and Benefits

 

  • Retain good clarity & light transmission at high temperature
  • Provide cost-effective performance
  • Good UV resistance
  • Adhere to leadframe and housing firmly
  • Good clarity retention
  • Good solder reflow properties
  • High yield

Applications & Uses

Composites Processing Methods
Product End Uses
System Preparation
  • Pre-Mixing: Component A to be preheated at 60°C/30min
  • Mixing: The mixture of component A/component B may be mixed using
  • standard techniques. Degassing: Use vacuum device; 0 - 10 mmHg
Application Information
  • Applicable for blue and white LED
  • Applicable for chip and high power LED

Technical Details & Test Data

Typical Cured Information

 - 1

          Fig 1: Viscosity increment at 25⁰C

 Initial viscosity BH type Viscometer at 25⁰C   :  1100 cps

Recommended cure schedule
Lamp LED 1st Step Cure at 110⁰C  : 1 hour
Post Cure at 150°C  : 5 hours

Note: Actual oven cure is dependent upon applications and substrate/component design.

Specimen cured at 110⁰C for 1 hr + 150°C for 5 hr

Property Test Method Test Values Unit At Condition
Glass Transition Temperature (Tg) DSC 125 °C -
Coefficient of Thermal Expansion - 63 ppm Before Tg
Coefficient of Thermal Expansion   175 ppm After Tg
Hardness (Shore D) ASTM D-2240 88 - -
Flexural Strength ASTM D-790 15.8 kg/mm² 25°C
Flexural Modulus ASTM D-790 290 kg/mm² 25°C
Shrinkage - 1.01 % -
Water Pick-Up (Boiling at 100°C for 24 hours) ASTM D570 1.55 % -
Volume Resistivity ASTM D257 1.25 x 10¹⁶ Ω·cm -
Dielectric Constant ASTM D150 3 - 1 MHz
Dielectric Loss ASTM D150 1.9 % 1 MHz

Transmittance (2mm Thickness)

       
Wavelength (nm) Transmittance Unit Test Condition  
400 82.66 % 2mm thickness  
500 85.42 % 2mm thickness  
600 86.56 % 2mm thickness  
700 88.27 % 2mm thickness  

Transmittance (UV Resistance after 365nm, 30mW/cm² for 400 hours)

       
Wavelength (nm) Transmittance Unit Test Condition  
400 68.63 %

365nm, 400 hours

 
500 83.36 %

365nm, 400 hours

 
600 86.07 %

365nm, 400 hours

 
700 87.98 %

365nm, 400 hours

 

Transmittance (Heat Resistance at 260°C for 10 minutes)

       
Wavelength (nm) Transmittance Unit Test Condition  
400 47.55 %

260°C, 10 minutes

 
500 65.44 %

260°C, 10 minutes

 
600 71.89 %

260°C, 10 minutes

 
700 77.19 %

260°C, 10 minutes

 

Safety & Health

Industrial Hygiene

Mandatory and recommended industrial hygiene procedures should be followed henever our products are being handled and processed.

Storage & Handling

Storage Conditions

The components have to be stored under dry conditions below 25°C, in tightly sealed original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. After this date, the product may be processed only following reanalysis. Partly emptied containers should be closed tightly immediately after use.Disposal - Regular procedures approved by national and/or local authorities.