Dimer Acid (Dimerized Fatty Acid) Flexibilizer
CAS Number: 61788-89-4
Dimer Acid is a C36 dicarboxylic acid produced by dimerization of unsaturated fatty acids (primarily oleic/linoleic acid), widely used as a flexibilizer and modifier in epoxy adhesive systems. When incorporated as part of the curing agent or as a reactive flexibilizer, it introduces long aliphatic chain segments into the epoxy network, dramatically improving peel strength, impact resistance, and low-temperature flexibility. Dimer acid-based polyamide curing agents are a cornerstone of flexible epoxy adhesive technology.
Technical Specifications
| color | ≤12 (Gardner) |
| viscosity | 5,000–10,000 mPa·s (25 °C) |
| acidNumber | 190–198 mg KOH/g |
| appearance | Amber viscous liquid |
| dimerContent | ≥90% |
Applications
- Flexible epoxy adhesive formulations
- Polyamide curing agent synthesis
- Polyurethane elastomers and sealants
- Corrosion-protective epoxy coatings
- Ink binder resins for metal substrates
Key Features
- Dramatically improves peel strength and impact resistance
- Introduces flexibility without external plasticizer
- Bio-based, renewable fatty acid origin
- Key intermediate for polyamide curing agent synthesis
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CAS Number
61788-89-4
Category
Adhesive / Sealant AdditivesAvailability
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