Abstract: A series of polyamide resins used for printing inks were synthesized by condensation polymerization of dimeric acid with isophorone diamine (IPDA) and other monomers. Results of differential scanning calorimetry (DSC) showed that polyamides prepared from IPDAhavehigher Shorehardness and shearing strength but lower melting point (Tm) andglass transition temperature (Tg).With the increase of IPDA:ethyl diamine (EDA) ratio,gel point of the alcoholic solution of polyamide decreased,while softening point decreased firstly, then increased. The softening point of polyamide (1009I) prepared from IPDA and dimeric acid was 103℃, the viscosity of its 40% solution in 1-propanol was 208 mPa·s at 25℃, and Tg 44.2℃, Shorehardness 79, shearing strength 14.64MPa, and solubility parameter 17.87×10-3(J·m-3)1/2. Polyamide 1009I is soluble in 1-propanol, tetrahydrofuran and n-butyl acetate. Gel point of its 20% n-propyl solution is -35℃, showinggoodgelling-resistance. However,IPDA can not improve the solubility of polyamide resin in ethonal.