T‑6136NS is a specialty UV‑curable acrylate resin formulated with nano‑fillers to deliver an exceptionally low refractive index of 1.365 while maintaining outstanding optical clarity. Designed for demanding optical coating applications, this resin enables significant transmittance gains on PET films, cures rapidly with a tack‑free surface, and offers excellent re‑adhesion and recoatability – making it a versatile choice for multi‑layer optical stacks.
Key Features & Benefits
Ultra‑low refractive index (1.365) – Minimizes reflectance and maximizes light transmission.
High transparency – Maintains excellent optical clarity with extremely low haze.
Fast surface cure – Tack‑free within seconds under UV exposure, ideal for high‑speed roll‑to‑roll processes.
Excellent re‑adhesion & recoatability – Enables easy rework and over‑coating without delamination.
Fluorine‑free – Environmentally friendly formulation with no halogenated components.
100% effective content – Solvent‑free, reducing VOC emissions and drying energy.
Broad compatibility – Miscible with most acrylate monomers, ester/ketone/aromatic solvents, and common UV oligomers (polyester, epoxy, polyurethane acrylates).
Technical Specifications
| Property | Value |
|---|---|
| Refractive Index | 1.365 |
| Viscosity at 25°C (mPa·s) | 1,000 – 1,500 |
| Glass Transition Temperature (Tg) | 70 °C |
| Molecular Weight (GPC) | 575 |
| Elongation at Break | 20% |
| Acid Value (mg KOH/g) | ≤ 1.0 |
| Specific Gravity | 1.15 |
| Effective Content | 100% |
| Curing Mechanism | Free‑radical polymerization of acrylates |
Optical Performance – PET Antireflection Coatings
T‑6136NS is specially engineered for PET‑based optical antireflection (AR) films. Its low refractive index makes it an ideal topcoat or index‑matching layer in multi‑layer stacks.
Single‑side single coating – Increases light transmittance by more than 3% compared to uncoated PET.
Single‑side combined with a high‑index coating – Boosts transmittance by approximately 5%.
Double‑side dual‑layer construction – Achieves up to 98% total transmittance while maintaining extremely low haze, rivaling glass AR solutions.
The resin's fluorine‑free chemistry allows reliable adhesion between multiple coated layers, offering broad process adaptability for both wet‑coating and lamination lines.
Compatibility for Formulation Flexibility
T‑6136NS is designed to integrate seamlessly into UV‑curable formulations.
Monomers
Miscible with a wide range of acrylate UV monomers (monofunctional, difunctional, and multifunctional).
Recommendation: Minimize monomer addition to avoid raising the refractive index – use only as needed for viscosity adjustment or crosslinking density.
Solvents
Fully soluble in esters (e.g., ethyl acetate, butyl acetate), ketones (e.g., MEK, acetone), and aromatic hydrocarbons (e.g., toluene, xylene).
Not soluble in pure alcohols (e.g., ethanol, IPA) – but can be dissolved in alcohol/ether co‑solvent mixtures.
Polymers / Oligomers
Highly compatible with polyester acrylates, epoxy acrylates, and polyurethane acrylates – allowing formulators to tailor mechanical properties, adhesion, and flexibility without sacrificing optical clarity.
Curing Characteristics
T‑6136NS cures via free‑radical photopolymerization of its acrylate groups. It exhibits:
Fast curing response – suitable for UV LED and medium‑pressure mercury lamps.
Excellent surface drying – yields a non‑tacky, scratch‑resistant finish even at low energy doses.
Good interlayer adhesion – due to its polar backbone, it bonds well to both untreated and primed PET substrates.
Typical cure conditions: 200–600 mJ/cm² (UVA) under inert or ambient atmosphere, depending on film thickness and line speed.
Primary Applications
Optical antireflection coatings for PET displays, touch panels, and window films.
High‑clarity protective layers for electronic device surfaces.
Index‑matching adhesives in multi‑layer optical stacks.
UV‑curable hard coats requiring low haze and high transmittance.
Re‑workable coatings for quality‑critical optical components.
Storage & Handling
Store in a cool, dry place away from direct sunlight and heat sources.
Keep containers tightly sealed to prevent moisture ingress and premature polymerization.
Recommended storage temperature: 10 – 30 °C.
Shelf life: 12 months from date of manufacture in original unopened containers.
Why Choose T‑6136NS?
T‑6136NS offers a unique balance of low refractive index, high transparency, and process flexibility that is hard to achieve with conventional UV resins. Whether you are upgrading an existing AR coating line or developing a new optical film, this resin provides a reliable, fluorine‑free, and cost‑effective path to premium optical performance – with transmittance values approaching 98% in optimized double‑side constructions.
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