Abstract: Novel two-component semi- and full interpenetrating polymer networks (IPN) of urethane – soya alkyd resins (UA) and poly (methyl acrylate) (PMA) by sequential technique were studied. With and without using ethylene glycol dimethacrylate to form full and semi interpenetrating polymer network respectively. The elastomers obtained were found to be tough films and characterized by mechanical properties: such as tensile strength, elongation and hardness (Shore A). The apparent densities and thermal properties of prepared samples were determined and compared.

KEYWORDS: - density, polyurethanes, strength, swelling, interpenetrating network (IPN), hardness, uralkyd, poly (methyl acrylate), TDI, tensile strength, polymer network.