o i 26 26 5 23 0 24 3oxygen index o sub 2______________________________________ dumbbell specimens cut in accordance with astm d 412 were aged in a forced air over for 28 days at 70 u00b0 c in accordance with astm d 573 stress strain tests as set forth in example 3 were performed on the aged samples a 45 mil sample of a mineral filled pvc control composition available as sarnafil u00ae pvc was aged and also tested at 23 u00b0 c the results of these tests are set forth in table 3 below table 3______________________________________properties at 23 u00b0 c aged dumbbell specimens control composition filled pvc composition composition polymer a c______________________________________100 modulus 1400 650 440psi200 modulus 1065 785psi300 modulus 1215 1060psitensile at 1705 1295 1290break psiretention 107 6 115 6 158 3elongation at 165 335 490break retention 80 5 85 9 87 5______________________________________ as can be seen from the above data the compositions of the present invention exhibit higher filler loadings which result in improved stress strain properties equivalent to improved l o i performance and significantly better heat aging properties than the filled pvc compositions a test for peel and shear adhesion was conducted as described below a composition including 100 parts of the polymer of example 1 filled with 125 part rutile titanium dioxide 2 5 parts tinuvin u00ae 327 and 0 5 parts polydis u00ae tr 016 designated composition d was milled into 6 u00d7 6 inch sheets approximately 40 mils in thickness scrim reinforced test pads were formed by inserting a 6 u00d7.