SINOMER® TCDDA (Tricyclodecane Dimethanol Diacrylate, CAS No.: 42594-17-2) is a low-viscosity difunctional acrylate monomer engineered for high-performance UV and electron beam (UV/EB) curing applications. Its unique rigid tricyclodecane core structure delivers exceptional hardness, high glass transition temperature (Tg > 155°C), low curing shrinkage, and outstanding chemical resistance, making it an essential building block for advanced polymer formulations .
SINOMER® TCDDA (C₁₈H₂₄O₄, Molecular Weight: 304) features two acrylate groups bonded to a rigid tricyclodecane backbone. This molecular architecture enables fast photopolymerization and crosslinking, resulting in cured materials with superior mechanical properties, dimensional stability, and durability under demanding conditions .
Key Specifications:
| Parameter | Value |
|---|---|
| Appearance | Colorless to pale yellow clear liquid |
| Viscosity (25°C, cps) | 110 – 160 |
| Density (25°C, g/cm³) | 1.090 – 1.130 |
| Refractive Index (nD @ 25°C) | 1.504 – 1.506 |
| Acid Value (mg KOH/g) | ≤ 0.5 |
| Moisture Content (ppm) | ≤ 2000 |
| Surface Tension | ~40.7 mN/m |
| Color (APHA) | ≤ 100 |
| Functionality | 2 |
Data Source: Sinocure internal testing & third-party analysis
SINOMER® TCDDA provides a Tg > 155°C (up to 180°C in optimized formulations), ensuring cured films and components maintain hardness, structural integrity, and dimensional stability even under elevated temperatures . This makes it ideal for applications requiring heat resistance and long-term durability.
The rigid ring structure of TCDDA significantly reduces volume shrinkage during photopolymerization — typically 8.4–8.6%, outperforming many conventional acrylate monomers . Low shrinkage minimizes internal stress, prevents cracking and warping, and ensures precise dimensional accuracy in demanding applications such as 3D printing and optical coatings.
With high acrylate functionality and excellent reactivity, SINOMER® TCDDA enables rapid curing under UV/EB exposure, supporting high-speed production lines and efficient manufacturing processes .
The dense crosslinked network formed during curing provides exceptional resistance to moisture, solvents, and aggressive chemicals, extending the service life of coatings, adhesives, and printed components in harsh environments .
SINOMER® TCDDA imparts superior surface hardness (pencil hardness up to 2H) and mechanical robustness, making it suitable for protective coatings and structural applications requiring high wear resistance .
With low volatility and excellent compatibility with various oligomers (urethane acrylates, epoxy acrylates, polyester acrylates) and other monomers, SINOMER® TCDDA is easy to incorporate into existing formulations without compromising stability or performance .
| Parameter | SINOMER® TCDDA | Competitor C | Competitor S |
|---|---|---|---|
| Color (APHA) | <15 | <25 | <25 |
| Purity (GC) | >96% | 96.23% | 95.77% |
| Viscosity (cps @ 25°C) | 130 | 132 | 136 |
| Moisture (ppm) | 198.2 | 212.4 | 301.5 |
| Refractive Index (nD @ 25°C) | 1.5046 | 1.5045 | 1.5046 |
| Tg (°C) | 155.8 | 156.2 | 152.6 |
| Curing Shrinkage (%) | 8.42 | 8.54 | 8.63 |
| Surface Dry Energy (mJ/cm²) | 285 | 290 | 285 |
| Pencil Hardness | 2H | 2H | 2H |
Data from independent laboratory testing
SINOMER® TCDDA is widely adopted across multiple industries where high performance, reliability, and durability are critical :
| Formulation Type | Typical Concentration |
|---|---|
| UV Coatings | 10 – 40% |
| UV Inks | 5 – 25% |
| 3D Printing Resins | 15 – 50% |
| Adhesives | 10 – 35% |
Optimal dosage should be determined through formulation-specific testing .
Oligomers: Urethane acrylates, epoxy acrylates, polyester acrylates
Monomers: TMPTA, TPGDA, HDDA, IBOA, PETA
Photoinitiators: Type I (e.g., 184, 1173, TPO) and Type II systems
Curing Wavelengths: 254 nm, 365 nm, 395 nm (LED), and 405 nm (3D printing)
| Benefit | Description |
|---|---|
| High Performance | Exceptional Tg, low shrinkage, and superior chemical resistance |
| Fast Curing | High reactivity supports high-speed production processes |
| Low Volatility | Minimizes material loss and environmental impact |
| Excellent Compatibility | Works with a wide range of oligomers, monomers, and photoinitiators |
| Proven Quality | Consistent batch-to-batch quality with strict quality control |
| Global Supply | Reliable supply chain with global shipping capabilities |
Sinocure Chemical Group specializes in the research, development, and manufacturing of high-performance monomers, oligomers, and specialty additives for UV/EB curing, coatings, inks, adhesives, and 3D printing industries. With a strong commitment to innovation, quality, and customer support, Sinocure provides tailored solutions to meet the evolving needs of the global market.
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