In this research polymer was prepared from Alkyd resin (U-PTE) with ratio 100% the and natural rubber with ratio 30%. The mixing process was performed by hand lay-up method. Some mechanical properties were studied in this work which included (flexural bending, shear stress, Impact test (charpy method) . the results showed that the addition of natural rubber to (u-pte) resin with this ratio leads to become the brittle behavior and decrease in the shear stress increase the ability of material to impact because the blend materials become elastic .the flexural strength increase of blend two times comparing with its value of pure resin while the result of shear stress value of blend showed decreasing with ratio(43%) but the impact value of blend increased with ratio (20%) with it value before the blending.