to the mixer and melt mixed for two additional minutes test specimens are prepared by compression molding the blend at 225 u00b0 c control stocks are prepared by using virgin urethane elastomer nylon blends are prepared by using nylon 6 6 6 6 10 terpolymer m p 160 u00b0 c zytel 63 50 nylon 6 31 nylon 6 6 and 19 nylon 6 10 the data show that the blends containing urethane elastomer having methylol phenolic groups grafted thereto exhibit substantial improvements in properties including increases in tensile strength and true stress at break the property improvement is indicative of enhanced compatibility between the two polymers table 1______________________________________ parts by weight 1 2 3 4 5 6______________________________________urethane elastomer 30 50 70 grafted urethane 30 50 70elastomernylon 6 6 6 6 10 70 70 50 50 30 30propertiesuts mpa 24 7 45 1 0 1 16 7 0 6 4 2m sub 100 mpa 6 5 19 2 0 9 13 6 0 6 0 7e mpa 79 704 3 6 280 lt 10 21elong 380 420 270 250 890 460tension set 82 85 80 75 6tsb mpa 119 235 0 4 58 5 9 24______________________________________ polymer blends are prepared as in table 1 except nylon 11 is used and 1 8 parts of a stabilizer system is incorporated the data is shown in table 2 stock 1 is a control containing.