Achieving high adhesion on inorganic substrates while maintaining excellent toughness has long been a technical challenge in the UV-curable coatings, inks, and adhesives industry. T-7132 is a multi-functional urethane acrylate specifically engineered to solve this problem. It delivers outstanding performance on substrates like stainless steel, glass, and ITO film without the need for complicated pre-treatment, while also excelling in boiling water resistance and vacuum metallization applications.
Product Introduction
T-7132 is a 100% solids specialty acrylate resin. Its unique molecular structure ensures a high double bond conversion rate and low volume shrinkage. As an enhanced toughness version of the 7128 resin, T-7132 significantly improves film flexibility and scratch resistance while maintaining excellent adhesion. It is particularly suitable for demanding applications on inorganic material surfaces.
Key Advantages & Technical Specifications
Typical Technical Data
| Property | Value | Description |
|---|---|---|
| Appearance | Clear Liquid | - |
| Color (Gardner) | ≤ 2 | Light color, ideal for clear or light-tint systems |
| Viscosity (25℃, mPa.s) | 18,000 | Moderate viscosity, easy handling in formulations |
| Effective Content | 100% | Solvent-free, eco-friendly UV resin |
| Molecular Weight (Mw) | 2,300 | Balanced reactivity and film-forming properties |
| Glass Transition Temp (Tg) | 10℃ | Provides excellent flexibility, preventing film brittleness |
| Elongation at Break | 40% | Significantly enhances coating toughness and impact resistance |
| Acid Value (mg KOH/g) | ≤ 10 | Promotes good affinity for metal substrates |
Key Features
Exceptional Adhesion, No Pre-treatment Needed
Provides strong cross-hatch adhesion to substrates such as stainless steel, aluminum alloy, anodized aluminum, ITO film, PCBs, glass, and ceramics-without the need for primers or complex surface preparation. This is attributed to its optimized acid value and urethane structure, which effectively wets and anchors onto various inorganic surfaces.
High Toughness & Scratch Resistance
With a low Tg of 10℃ and 40% elongation at break, cured T-7132 films exhibit remarkable flexibility, resisting deformation without delamination. Furthermore, the dense polymer network resulting from its high double bond conversion imparts excellent scratch resistance to the coating.
Superior Boiling Water Resistance
T-7132 maintains stable adhesion without peeling or blistering, whether subjected to room-temperature water immersion or boiling water tests. This makes it suitable for harsh environments involving frequent water contact or high humidity.
Optimized for Vacuum Metallization
The extremely high double bond conversion ensures low shrinkage and thorough curing. When used as a UV basecoat for vacuum metallization, it forms a perfect foundation, effectively preventing defects like rainbow effects or haze in the subsequent metal layer.
Recommended Applications
Thanks to its unique performance profile, T-7132 is the ideal choice for the following fields:
1. UV Coatings
Glass/Metal Surface Coatings: Provides a tough, protective layer with high adhesion.
UV Basecoats for Vacuum Metallization: T-7132 is the preferred primary resin for UV basecoats, adhering strongly to various metal or glass substrates and ensuring a clear, defect-free appearance of the final metallized layer.
2. UV Adhesives
Glass-to-Metal Bonding: Ideal for bonding organic and inorganic materials in electronics, crafts, and other industries. It features fast curing, low shrinkage, and is odor-free, providing reliable bond strength and water resistance.
3. UV Inks
Screen Inks for Inorganic Materials: Enhances ink adhesion for screen printing on glass and ceramic surfaces.
Metal Decorating Inks: Suitable for roller or offset printing on metal sheets (e.g., iron, aluminum). Meets requirements for steam sterilization resistance and impact toughness tests.
Formulation Guidelines & Compatibility
T-7132 exhibits broad compatibility and can be blended effectively with various oligomers, including polyester acrylates, epoxy acrylates, urethane acrylates, and phosphate acrylates, allowing for flexible formulation adjustments.
For Vacuum Metallization (Anti-Rainbow/Anti-Haze): It is recommended to combine T-7132 with AM324 monomer. Its low shrinkage特性 helps accelerate curing and ensures a flawless metallized finish.
For Maximum Adhesive Strength: In bonding applications demanding peak adhesion, blending with FM-350B monomer can help balance the volume shrinkage contributed by high-functional monomers.
For Enhanced Water Resistance & Pigment Wetting: Pairing T-7132 with Trust 7131 urethane acrylate synergistically improves the film's resistance to water and its ability to disperse pigments effectively.
Curing Conditions
Recommended Energy: UV cumulative energy of no less than 800 mJ/cm².
Characteristics: Under these conditions, the coating achieves full cure and develops its optimal physical properties.
Product Specifications
Appearance: Clear to slightly hazy viscous liquid
Effective Content: 100%
Packaging: Available in standard industrial packaging upon request
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