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
specialty acrylates for UV curable hardcoats

Application field benefits

 

  • Architectural panels and films
  • Interior and exterior automotive parts
  • Helmet visors, goggles and ophthalmic lens
  • Consumer electronics
  • Solar films
specialty acrylates for UV curable hardcoats

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
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

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