T-7131 is a trifunctional aliphatic urethane acrylate resin specifically designed for hard-to-adhere substrates such as glass, ceramics, and metals. With excellent adhesion, outstanding resistance to boiling water, low shrinkage, and superior pigment wetting properties, this resin has become an ideal choice for UV-curable coatings, inks, and adhesives. This article provides a comprehensive review of T-7131's technical properties, application areas, and formulation recommendations for engineers and purchasers.
Technical Specifications
T-7131 is a high-reactivity, low-viscosity resin suitable for surface treatment on various demanding substrates. Key parameters include:
Glass Transition Temperature (Tg): 25℃
Viscosity at 25℃: 1600 mPa·s
Elongation at Break: 25%
Acid Value: ≤15 mg KOH/g
Specific Gravity: 1.14
Effective Content: 100%
The resin exhibits very low shrinkage and achieves excellent adhesion and water resistance without the need for phosphate ester monomers, making it particularly suitable for applications requiring high transparency and hardness.
Key Advantages & Applications
1. Superior Adhesion & Chemical Resistance
T-7131 demonstrates excellent cross-cut adhesion and scratch resistance on float glass, tempered glass, ceramics, and metals. It offers remarkable resistance to boiling water, maintaining coating integrity over time without relying on coupling agents.
2. Broad Application Range
UV Adhesives: Ideal for structural bonding of glass and metal, offering high transparency and strength.
UV Coatings: Suitable for glass electroplating, ceramic printing, and roll or curtain coating on metals, providing long-lasting water-resistant protection.
UV Inks: Especially recommended for screen printing on ITO glass, decorative glass, ceramics, and metals. Suitable for formulations with high filler content and fast curing requirements.
3. Excellent Compatibility
T-7131 shows good compatibility with common polymers such as polyesters, epoxies, polyurethanes, and acrylates. It is miscible with esters, ketones, and aromatic solvents, offering flexibility in formulation design.
Formulation Recommendations & Synergistic Effects
For optimized performance, consider combining T-7131 with the following resins:
With Trust 7128 (difunctional urethane acrylate): Significantly improves adhesion to inorganic materials such as glass and ceramics.
With Trust 7133 (trifunctional urethane acrylate): Enhances coating hardness, acid/alkali resistance, and chemical durability. Recommended for screen-printed protective inks for electronic touchscreens.
Note: Recommended UV curing energy is not less than 500 mJ/cm² to ensure complete curing and water resistance.
Frequently Asked Questions (FAQ)
Q1: Can T-7131 be used for outdoor weather-resistant coatings?
A: Yes, T-7131 offers excellent water resistance and adhesion, making it suitable for outdoor decorative and protective coatings on glass and metal. For long-term exposure to strong UV, adding light stabilizers is recommended.
Q2: Is this resin suitable for spray application?
A: Yes, its low viscosity (1600 mPa·s) and good leveling properties make it suitable for spraying, rolling, and curtain coating.
Q3: How can adhesion to metal be further improved?
A: Combining with Trust 7128 or adding adhesion promoters (compatibility testing advised) can enhance metal adhesion.
Packaging & Technical Support
Packaging: 20 kg plastic pail, 200 kg steel drum
Technical Data Sheet (TDS) & MSDS: Available upon request or via official website
Conclusion
T-7131 trifunctional aliphatic urethane acrylate resin, with its excellent adhesion, boiling water resistance, and low viscosity, is a top choice for surface treatment on glass, ceramics, and metals. Whether in UV coatings, inks, or adhesives, T-7131 delivers reliable high-performance solutions.
For product details, samples, or technical support, please contact us via our official website or customer service channels.