T-7166 is a difunctional, polyester-modified acrylate oligomer, expertly engineered to deliver outstanding, wide-spectrum adhesion on notoriously difficult substrates-including PET, glass-filled nylon (PA+GF), PPS, and PMMA. Its core advantage lies in its unique molecular architecture. The difunctional design, compared to higher-functionality resins, creates a polymer network with inherent flexibility and significantly lower curing shrinkage. This results in minimal internal stress, which is the key to its robust and reliable adhesion on diverse surfaces. The polyester modification further enhances this by providing excellent toughness and elongation, preventing cracks in demanding environments.
Key Advantages of T-7166:
Proven Adhesion on Engineering Plastics: Achieves strong bonds on PET, PA, PPS, PBT, and BMC without the need for extensive pre-treatment.
Exceptional Flexibility & Toughness: Its chemical structure offers superior impact resistance and elasticity, making it ideal for parts that bend, flex, or experience thermal cycling.
Low Shrinkage & Low Stress: The difunctional nature minimizes volume contraction during curing, preserving adhesion integrity and reducing the risk of delamination or part warpage.
Excellent Ink & Coating Performance: Provides outstanding pigment wetting for vibrant, stable colors and features excellent water-oil balance for lithographic (offset) UV ink applications.
Primary Application Fields:
T-7166 serves as a versatile workhorse resin in three critical areas:
Flexible UV Adhesives: Perfect for bonding and potting applications on PET, PA, and PMMA components where a degree of movement or stress relief is required, ensuring long-term bond integrity.
Durable UV Inks: An excellent choice for screen, roller, or offset printing on PET films and other plastic substrates, delivering strong adhesion alongside vibrant, flexible print layers.
Tough UV Coatings: Provides a protective, adherent, and flexible coating layer for PA, PA+GF, and PET materials, especially where coating resilience is as important as adhesion.
Optimized Formulation Synergies:
To maximize its potential, T-7166 works exceptionally well with key monomers:
With FM-350: This combination is highly recommended to further reduce shrinkage and enhance both adhesion and toughness, creating an ultra-reliable, stress-free matrix.
With AM-313: Pairing with this monomer maintains T-7166's excellent adhesion while boosting curing speed and surface scratch resistance for applications needing a tougher exterior.
T-7166 vs. T-7168: Choosing the Right Tool
While both resins offer wide adhesion, the choice hinges on your performance priority:
Choose T-7166 (Difunctional) when your application demands maximum flexibility, toughness, and low-stress adhesion. It's the preferred choice for bendable films, parts under mechanical stress, or coatings on substrates with different thermal expansion rates.
Choose T-7168 (Tetrafunctional) when your primary needs are extreme surface hardness, very fast cure speed, and maximum abrasion resistance.