Tripropylene Glycol Diacrylate (TPGDA) for UV Ink
CAS Number: 42978-66-5
Tripropylene glycol diacrylate (TPGDA) is a low-viscosity bifunctional reactive diluent for UV offset, flexo, and screen inks, widely used to reduce oligomer viscosity to press-applicable levels while contributing crosslinking density and adhesion. Its low skin-sensitization profile relative to monofunctional acrylates and its fast cure speed under both mercury and LED UV sources make it the most popular difunctional diluent in UV printing ink formulations.
Technical Specifications
| appearance | Clear colorless to pale yellow liquid |
| purity (%) | ≥95 |
| viscosity (mPa·s) | 10–20 (25 °C) |
| acid value (mgKOH/g) | ≤0.5 |
| inhibitor (MEHQ, ppm) | 100–200 |
Applications
- Reactive diluent in UV offset ink formulations
- Viscosity reducer in UV flexo and screen inks
- Crosslinker in UV digital inkjet inks
- Co-monomer in UV-curable overprint varnishes
- UV LED ink reactive diluent for LED-curable systems
Key Features
- Very low viscosity for efficient oligomer dilution in UV inks
- Bifunctional crosslinking for improved film hardness and chemical resistance
- Reduced skin-sensitization risk versus monoacrylates
- Fast UV cure response under both mercury arc and LED sources
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CAS Number
42978-66-5
Category
Printing Ink ChemicalsAvailability
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