Dimer Acid (Dimerized Fatty Acid) Flexibilizer

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.