UR5635 Light Diffusing Polyurethane Resin

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A two-part, semi-rigid polyurethane resin which has been formulated to have a light diffusing effect. Its cloudy appearance offers a unique light diffusion effect which has seen UR5635 used to great success as an LED resin for both decorative and protective applications. It is also resistant to UV light making it especially useful as an outdoor LED encapsulant or for use in other applications where it may be exposed to direct sunlight.


Approvals RoHS Compliant (2015/863/EU): Yes
UL Approval: No
Typical Properties
Liquid Properties: Base Material Polyurethane
Density Part A – Resin (g/ml) 1.04
Density Part B – Hardener (g/ml) 1.16
Part A Viscosity (mPa s @ 23ºC) 900
Part B Viscosity (mPa s @ 23ºC) 1200
Mixed System Viscosity (mPa s @ 23ºC) 1050
Mix Ratio (Weight) 0.90:1
Mix Ratio (Volume) 1:1
Usable Life (20°C) ~15 mins
Gel Time (23°C) ~20 mins
Cure Time (23 °C) 24 hours
Cure Time (60 °C) 4 hours
Colour Part A – Resin Hazy/cloudy White
Colour Part B – Hardener Clear
Storage Conditions Dry Conditions: Above 5ºC, Below 30ºC
Shelf Life 12 months
Shrinkage < 1%

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