Product Overview and Technical Parameters
T‑7001 is a solvent‑free, 100% solids UV resin. It is a clear liquid with moderate viscosity, allowing easy processing in coating, adhesive, and ink formulations. The table below summarises its typical physical and chemical properties.
| Parameter | Typical Value |
|---|---|
| Appearance | Clear liquid |
| Viscosity (at 60°C) | Approx. 35,000 mPa·s |
| Elongation at break | Approx. 65% |
| Acid value | ≤ 2 mg KOH/g |
| Molecular weight (GPC) | Approx. 7,500 |
| Glass transition temperature (Tg) | Approx. –50°C |
| Specific gravity | Approx. 1.10 |
| Solids content | 100% |
The low acid value minimises unwanted side reactions, contributing to formulation stability. The molecular weight and elongation values indicate a material that provides both sufficient flow for coating uniformity and the flexibility required for demanding end‑use environments.
Key Performance Characteristics
Low Shrinkage and High Flexibility
One of the most notable features of T‑7001 is its low volumetric shrinkage during UV curing. This reduces internal stress build‑up, which helps prevent warping, delamination, or distortion of the substrate – a critical advantage when coating thin films, intricate moulded parts, or dimensionally sensitive components. With an elongation at break of approximately 65%, the cured film remains flexible, accommodating substrate expansion, contraction, or bending without cracking. This combination of low shrinkage and high flexibility makes it suitable for applications ranging from flexible packaging to curved electronic housings.
Excellent Adhesion to Multiple Substrates
The resin exhibits strong adhesion to a variety of engineering plastics (including ABS and polycarbonate), metals (such as aluminium and stainless steel), and glass. The polar groups in its molecular chain interact effectively with substrate surfaces, promoting wetting and mechanical interlocking after cure. In vacuum metallisation processes, T‑7001 serves as an effective primer, bonding the metal deposit firmly to the plastic base. It also adheres well to other coated layers, which is beneficial for multi‑coat systems.
Hydrolysis Resistance and Weatherability
With a low glass transition temperature (Tg ≈ –50°C), the cured film retains its mechanical properties even under humid and hot conditions. The crosslinked network structure provides a barrier against moisture penetration, reducing the risk of adhesion loss or haze formation. Accelerated ageing tests – including water boil tests and damp‑heat exposure – have shown that coatings or adhesive bonds made with T‑7001 do not exhibit whitening, debonding, or a significant drop in adhesion or transparency. This reliability is especially valued in automotive interiors, outdoor signage, and appliances that may encounter humidity or temperature cycling.
High Transparency and Yellowing Resistance
After curing, T‑7001 forms a clear, colourless film with excellent light transmission. It remains stable under UV exposure and elevated temperatures, with minimal yellowing over time. This optical clarity is essential for applications such as optical display films, touch panels, and decorative overlays where visual quality is a priority.
Main Application Areas
UV Pressure‑Sensitive Adhesives (PSAs)
In anaerobic conditions – for example, between laminated layers – T‑7001 cures thoroughly to provide a balance of tack, peel strength, and cohesive strength. Its inherent tackiness ensures good initial grab, while its cohesive strength supports long‑term holding power. These properties make it a candidate for optical PSAs used in display module bonding, protective films, and touch‑screen assemblies. The resin is also compatible with the monomer AM‑312, which enhances both tack and cohesion in PSA formulations.
UV Coatings – Vacuum Metallisation Primers
In vacuum coating processes (e.g., physical vapour deposition), T‑7001 is recommended as a primer coat. It bonds strongly to both the plastic substrate and the subsequently deposited metal layer (often aluminium or chromium). Its excellent water resistance allows coated parts to pass rigorous reliability tests such as boiling water immersion without blistering or peeling. In many cases, the primer can be topcoated directly without an intermediate layer, simplifying the process and reducing material costs. The resulting system has been tested for vibration and abrasion resistance, meeting requirements for consumer electronics, such as mobile phone housings and automotive decorative trim.
UV Inks – IMD/IML and Optical Film Printing
When incorporated into UV‑curable inks, T‑7001 reduces volume shrinkage during cure, thereby minimising distortion of printed patterns. This is particularly relevant for in‑mould decoration (IMD) and in‑mould labelling (IML) processes, where precise dimensional stability is required. The resin also imparts excellent resistance to water and chemicals, making the printed layer durable in harsh environments. Its high transparency supports vibrant colour reproduction and is suitable for optical display films, control panel overlays, and other thin‑film applications.
Formulation Compatibility
T‑7001 is designed to work well with a wide range of formulation ingredients, giving formulators flexibility to tailor properties.
Monomers – It is miscible with most conventional mono‑, di‑, and multifunctional acrylates.
Solvents – The resin dissolves readily in esters, ketones, and aromatic hydrocarbons. It is not soluble in pure alcohols but can be dissolved in mixed solvents containing alcohols and ethers (e.g., ethanol/ethyl acetate blends).
Polymers – It shows good compatibility with polyesters, epoxies, polyurethanes, phosphate esters, and other acrylate resins, enabling blended systems for optimised performance (e.g., hardness‑flexibility balance or enhanced adhesion).
Summary and Selection Considerations
T‑7001 is a difunctional polyurethane acrylate UV resin that combines low shrinkage, high flexibility, robust adhesion, and outstanding hydrolysis resistance. Its technical parameters – including a moderate viscosity, high elongation, and low Tg – position it as a versatile platform for UV‑curable adhesives, coatings, and inks.
Key selection reasons include:
Reliable bonding to plastics, metals, and glass without special surface treatment.
Stable performance under humid, hot, or water‑immersed conditions.
Low cure shrinkage for distortion‑free parts.
Optical clarity and colour stability for display and decorative uses.
Broad formulation compatibility for ease of integration.
Whether used as a pressure‑sensitive adhesive, a vacuum‑deposition primer, or a low‑shrink ink binder, T‑7001 offers a balanced set of properties that meet the performance demands of advanced manufacturing. Its proven reliability in accelerated ageing tests and production‑scale processes makes it a practical choice for engineers and chemists seeking a durable, high‑performance UV resin system.