UV curable hardcoats

Our selection of specialty acrylates to address extreme conditions

Why moving to UV cured hardcoats ?

Curing process advantages

Very high productivity
Process efficiency and flexibility
No solvent emission
One layer UV coated – no primer required

specialty acrylates for UV curable hardcoats

Excellence of final film performance

High-end quality finish
Very high scratch resistance
Superior chemical resistance
Very good exterior durability
Adhesion to difficult substrates

Application field benefits

Architectural panels and films
Interior and exterior automotive parts
Helmet visors, goggles and ophthalmic lens
Consumer electronics
Solar films

Our selection of oligomers

Oligomer	F*	Attributes	Viscosity	Tg by DMA	Persoz pendulum hardness
CN9210	6	Good hardness and abrasion resistance	2 Pa.s @60°C	120°C	340
CN9215	6	Good hardness and abrasion resistance	1,2 Pa.s @50°C	40°C	320
CN9276	4	Good impact and scratch resistance	5,8 Pa.s @25°C	90°C	300

^{F*= functionality}

Scratch resistance highlight

Our best in class oligomers for superior scratch resistance:
➞Formulation on black ABS: Oligomer (50%) + CN9001 (10%) + SR238 (35%) + photoinitiators (5%)

➞ Crockmeter with dried textile (Volkswagen TL 226):

9N applied on the tip
Gloss retention (%): (Gloss after 100 double rubs) / (Initial gloss)

Exterior durability demonstration

Our choice of oligomers for improved weathering properties:

Florida (USA) exposure - some selected results:

	Selection	Functionality	Tg	Gloss retention	Delta yellow index
Test for 7,5 years	CN9001	2	55°C	85%	-3,1
	CN981	2	35°C	97%	-2,1
	CN991	2	15°C	97,5%	-1,05
	SR531	1	10°C	100%	-0,73
Test for 6 years	SR595	2	90°C	97%	-1,2
Test for 6 years	SR833S	2	185°C	81%	0,45

^{Florida (USA) exposure: Inland, facing south, 5° angle - Substrate: cold roll steel with E.coat/primer and white automotive basecoat}
^{Solvent free clearcoat: 50% oligomers + 50% monomers + 3% TPO-L - Film thickness: 35-45 μm}
^{Curing conditions: 4,5 J/cm2 with Heraeus lamps - bulbs V and H - under nitrogen}