Preparation and evaluation of polyamides for printing ink

N ON-reactive polyamides were prepared by reacting Soy-based dimer fatty acids and, two different diamines (ethylenediamine and isophornedimine).Soy-based dimer fatty acids used was of dimer/trimer/ Monomer mixtures, ≥80/ ≤18/ ≤5.The number average molecular weight of polyamide (Mn) ranged from 2479-2803, weight average molecular weight (Mwt) from 6761-10220, Z weight average molecular weight (Mz) from 13532-26876, maximum peak (Mp) from 5555-7448 and the most fundamental characteristic of a polymer its molecular weight distribution(PDI) degree of polymerization ranged from 2.727-3.713, the melting point (Tm) 106.477, the glass transition (Tg) was 76.46-98.9°C, the viscosity of 35% solution in butanol / toluene 1:1,v/v, 85-128 s at 25°C (Ford Cup No. 4) , the Softing point was 114-123°C.and Evaluation gloss and color strength polyamides in ink on films (paper, polyethylene milk, and polyvinylchloride).Most of these polyamides have properties comparable to the commercially available polyamides used in flexographic inks.