Trimethylolpropane Triacrylate (TMPTA) for UV Ink
CAS Number: 15625-89-5
Trimethylolpropane triacrylate (TMPTA) is a trifunctional reactive crosslinker monomer for UV offset, screen, and flexo inks, providing the highest crosslink density of common reactive diluents and resulting in maximum hardness, scratch resistance, and chemical resistance in cured ink films. Used at 5–30% in UV ink formulations, TMPTA balances the flexibility of difunctional diluents and controls ink tack and flow while accelerating cure speed.
Technical Specifications
| appearance | Clear colorless to pale yellow liquid |
| purity (%) | ≥90 |
| viscosity (mPa·s) | 90–120 (25 °C) |
| acid value (mgKOH/g) | ≤0.5 |
| inhibitor (MEHQ, ppm) | 200–400 |
Applications
- Crosslinker in UV offset and screen-printing inks
- Hardness and chemical resistance builder in UV flexo inks
- Reactive diluent in UV LED-curable formulations
- UV overprint varnish hardener
- Co-crosslinker in UV digital inkjet inks
Key Features
- Highest crosslink density for maximum hardness and scratch resistance
- Accelerates UV cure speed through trifunctional radical generation
- Reduces cured film tackiness and improves chemical resistance
- Compatible with all standard epoxy, urethane, and polyester acrylate oligomers
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CAS Number
15625-89-5
Category
Printing Ink ChemicalsAvailability
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