Rosin-Modified Maleic Resin
CAS Number: 68909-75-1
Rosin-modified maleic (RMM) resin is a hard, high-melting thermoplastic resin used as the primary binder in heatset and sheetfed offset inks, providing exceptional tack, gloss, and rub resistance on coated paper stocks. Its high acid value ensures rapid setting in the ink train and excellent pigment wetting for both organic and inorganic pigments. Compatible with hydrocarbon resins and alkyd varnishes for balanced rheology.
Technical Specifications
| appearance | Pale amber to amber hard resin chips |
| solubility | Aliphatic/aromatic hydrocarbons |
| color (Gardner) | ≤8 |
| acid value (mgKOH/g) | 15–30 |
| softening point (°C) | 140–165 |
Applications
- Heatset web offset inks for magazines and catalogs
- Sheetfed offset inks on coated art paper
- News ink binders for high-speed coldset printing
- Overprint varnishes for offset-printed cartons
- Publication gravure ink varnishes
Key Features
- High softening point for excellent heat resistance in heatset ovens
- Strong tack for reliable transfer on high-speed offset presses
- Superior gloss development on coated paper substrates
- Good compatibility with alkyd and hydrocarbon resin varnishes
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CAS Number
68909-75-1
Category
Printing Ink ChemicalsAvailability
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