UR5638 Transparent LED Resin

In Stock

UR5638 is an optically clear / transparent polyurethane resin consisting of an aliphatic polymer designed to provide excellent UV stability while at the same time excellent transmission of the visible spectrum of light. This makes it an ideal choice for potting LEDs which operate in the visible light spectrum, in particular white LEDs.


Approvals RoHS Compliant (2015/863/EU): Yes
UL Approval: No
Typical Properties
Liquid Properties: Base Material Polyurethane
Density Part A – Resin (g/ml) 0.99
Density Part B – Hardener (g/ml) 1.16
Part A Viscosity (mPa s @ 23ºC) 2400
Part B Viscosity (mPa s @ 23ºC) 1200
Mixed System Viscosity (mPa s @ 23ºC) 2000
Mix Ratio (Weight) 3.73:1
Mix Ratio (Volume) 4.42:1
Usable Life (20°C) ~50 mins
Gel Time (23°C) ~100 mins
Cure Time (23 °C) 24 hours
Cure Time (60 °C) 4 hours
Colour Part A – Resin Clear
Colour Part B – Hardener Clear
Storage Conditions Dry Conditions: Above 5ºC, Below 30ºC
Shelf Life 12 months
Shrinkage < 1%
Refractive Index 1.481

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