Opti-tec 4210 Optically Clear, Hard Polyurethane Encapsulant and Potting Compound

Description

Opti-tec 4210 is a two-part, high hardness, room temperature curing polyurethane resin designed for the potting and encapsulation of electronic devices requiring very high clarity. Opti-tec 4210 has excellent outdoor weathering properties, due to the incorporation of both UV resistant base materials and the addition of UV stabilisers and antioxidants. Opti-tec 4210 is a harder version of Opti-tec 4200.

Features & Benefits

• Water clear – for high clarity potting, encapsulating, casting
• Very hard, Shore D80 – resists scratching and marking
• Excellent long term UV stability – can be used outdoors
• Low viscosity – easy to mix and process
• High mechanical strength

Applications

1. Potting of LED lighting projects, including LED tracks, arrays, luminaires
2. Protection of electronics located outside or walked on; uplighters
3. Optical instruments
4. High quality casting resin
5. Lens forming

Specifications

	Resin	Hardener	Mixed
Colour	Clear	Clear	Clear
Specific gravity (g/ml)	1.05	1.13	1.09
Viscosity m.Pa.s @ 25°C	2500	1200	1700
Mix ratio by weight	0.93:1
Mix ratio by volume	1:1
Curing (typical values – will vary according to mass and application. Higher cure temperatures will result in greater cure shrinkage and exotherm)
Pot life (100g mix @ 20-25°C)	30 minutes
Gel time (100g mix @ 20-25°C)	40 minutes
Light handling	48 hours @ 20-25°C 24 hours @ 40°C 12 hours @ 60°C
Full cure	72 hours @ 20-25°C 24 hours @ 40°C 12 hours @ 60°C
Cured properties
Water absorption	0.87% (30 days @ 25°C)
Shore D hardness	80
Operating temperature (application & geometry dependant)	-55 to +120°C
Thermal conductivity	0.25 W/mK
Tensile strength	26 mPa
Elongation at break	5-10%
Compressive yield strength	30 mPa
Coefficient of linear expansion	60-80 pp/m°C
Volume resistivity	3 x 1014 ohm.cm
Surface resistivity	3 x 1015 ohm
Electric strength	20 kV/mm
Refractive index	1.47-1.48
Opti-tec 4210 is RoHS compliant and contains 0% REACH SVHC. Mercury free.

Ordering Information

Opti-tec 4210 is available in bulk, cartridges and twin packs.

Part number	Description
OPT4210-50G	Clear Hard Polyurethane Encapsulant – 50g double syringe cartridge
IDM805001	Syringe Gun – for 50g cartridges
OPT4210-250G	Clear Hard Polyurethane Encapsulant – 250g twin pack sachet
OPT4210-1KG	Clear Hard Polyurethane Encapsulant – 1 kilogram kit