Arcmotive LT 460 UV Cure Lens Hardcoat
An ultraviolet cured acrylate hardcoat for polycarbonate lenses, applied at a higher film build than LT 410 and cured in seconds under a lamp rather than in an oven bake. It is specified where line rate, oven capacity or part distortion decides the choice of hardcoat.
Grade Arcmotive LT 460 | Range Automotive Coatings | Technology Ultraviolet curing acrylate hardcoat, solvent-borne
Technical Data Sheet
Arcmotive LT 460
Issue 2026.09
1. Product description
An ultraviolet cured acrylate hardcoat for polycarbonate lenses, applied at a higher film build than LT 410 and cured in seconds under a lamp rather than in an hour or more in an oven. That suits high-volume lamp lines and keeps heat load off thin-wall mouldings that would distort in a long bake. Abrasion resistance is close to the thermal siloxane route but is not normally better than it, so LT 460 is specified where line rate, oven capacity or part distortion decides the choice, and LT 410 where the haze limit after abrasion is the hardest clause in the protocol.
2. Features
- Cures in seconds under ultraviolet lamps, suiting high-volume lamp lines
- Keeps heat load off thin-wall mouldings that would distort in a long bake
- Abrasion resistance close to the thermal siloxane route, though not normally better than LT 410
- Flow coat, dip or spray application
- Supplied for primed or unprimed polycarbonate depending on the weathering requirement
3. Recommended uses
Polycarbonate headlamp and tail-lamp lenses on high-volume lines and thin-wall mouldings. Where the haze limit after abrasion is the deciding clause in the protocol, LT 410 is specified instead.
Substrates. Polycarbonate lenses, primed or unprimed depending on the weathering requirement.
4. Typical properties
| Property | Typical value | Method |
|---|---|---|
| Technology | Ultraviolet curing acrylate hardcoat, solvent-borne | Formulation |
| Appearance | Clear, optically transparent cured film | Customer or supplier protocol, visual assessment |
| Dry film thickness | 10 to 20 micrometres | ISO 2808 |
| Taber abrasion, CS-10F wheels, 500 g load | Haze increase below 2 per cent at 100 cycles and below 5 to 10 per cent at 1000 cycles, depending on the customer protocol; close to LT 410 but not normally lower, so LT 410 is specified where the haze limit after abrasion is the deciding clause | ASTM D1044, haze measured to ASTM D1003 |
| Pencil hardness | 3H and above | ISO 15184 |
| Cross-cut adhesion, initial and after ageing | Classification 0 to 1 with no flaking at the cut intersections, held after humidity, thermal cycling and chemical exposure | ISO 2409 |
| Condensation humidity resistance | 240 to 504 hours at 40 degrees Celsius with no blistering, softening or adhesion loss, assessed after 1 to 2 hours recovery | ISO 6270-2 |
| Accelerated weathering, xenon arc with filtered daylight | 1000 to 2500 hours depending on the customer protocol, with haze and yellowing within the agreed limit | ISO 16474-2, or ISO 4892-2 where the protocol is written against the moulding |
| Temperature cycling | 10 cycles between minus 40 and 120 degrees Celsius with adhesion held and no blistering, cracking or flaking | Customer protocol cycle, assessed to ISO 2409 and ISO 4628-1 to ISO 4628-5 |
| Ultraviolet cure dose at the part surface | 1000 to 2000 millijoules per square centimetre | Radiometer on the conveyor, instrument and spectral band as agreed in the customer or supplier protocol |
Typical values, not a specification. Values for each batch are given on its Certificate of Analysis.
5. Application
| Parameter | Guidance |
|---|---|
| Application method | Flow coat, dip or spray, under filtered air. |
| Surface preparation | Polycarbonate lenses, primed or unprimed depending on the weathering requirement, clean, dry and free of mould release and dust. |
| Dry film thickness | 10 to 20 micrometres. |
| Flash off and pre-cure | Solvent flash 3 to 5 minutes, then infrared or oven pre-cure at typically 60 degrees Celsius. |
| Ultraviolet cure | Measured dose of 1000 to 2000 millijoules per square centimetre at the part surface, read with the radiometer and in the spectral band agreed for the line, and checked on the conveyor, since lamp output falls with hours in service. |
| Quality control | Check haze after abrasion and adhesion on witness parts at the frequency set in the customer protocol. |
| Safety and handling | Refer to the Safety Data Sheet, issued on request against the product supplied. |
Process. Flow coat, dip or spray at 10 to 20 micrometres. Solvent flash 3 to 5 minutes, infrared or oven pre-cure at 60 degrees Celsius, then ultraviolet cure at a measured dose of 1000 to 2000 millijoules per square centimetre at the part surface.
6. Storage and handling
Store in the original closed, opaque containers in a cool, dry, well-ventilated store, protected from daylight and any ultraviolet source and away from sources of heat, since light can start cure in the container. Shelf life is stated on the label and the Certificate of Analysis. Handle and use the product in line with its Safety Data Sheet.
7. Safety and regulatory information
Read the Safety Data Sheet before use. Safety Data Sheets and regulatory declarations are issued by our technical centre against the product and batch supplied, so they are sent on request rather than published. Request a Safety Data Sheet or declaration.
This Technical Data Sheet is published for on-screen reference. The information is given in good faith from laboratory and application experience and describes typical values; it is not a specification and does not replace a trial on your own substrate and line. Arctic Materials may revise this sheet without notice. Issue 2026.09.
Technical Data Sheets on this site are for on-screen viewing. For a controlled copy, write to tech@arcticmaterials.com.
Other grades in this range
Need a Safety Data Sheet, a regulatory declaration or a grade specified to your line? Contact our technical centre.