time______________________________________1 6 2 minutes1 3 4 minutes0 8 7 minutes0 4 24 minutes0 several days______________________________________ components a b of example 2 were mixed to form a rubber mixture according to the invention which was then used to bond 2 mm thick sealing materials to zes steel plates curing took place for 25 minutes at 170 u00b0 c the tensile shear strength measured 16 dan cm 2 the failure pattern was adhesive failure and cohesive failure in the sealing material the rubber mixtures according to the formulation of example 3 were used to bond sealing material to zes steel plates or steel plates galvanized on one side the mixtures were cured on the one hand for 25 minutes at 170 u00b0 c and on the other hand for 1 hour at 200 u00b0 c the tensile shear strengths of the bond were determined after storage for one day at room temperature and after humid storage for 7 days at 70 u00b0 c the following results were obtained ______________________________________ tensile shear tensile shear strength after strength aftersubstrate 1 1 d rt 7 d 70 u00b0 c curing dan cm sup 2 dan cm sup 2 change______________________________________zes steel 16 8 17 2 2 plates 25mins 170 u00b0 c zes steel 21 0 21 5 2 4 plates 1 h at 200 u00b0 c steel plates 17 6 20 5 16 5 galvanized on oneside 25 mins 170 u00b0 c ______________________________________ the following results were obtained with the mixtures according to example 4 ______________________________________ tensile shear tensile shearsubstrate strength strength after curing dan cm sup 2 ageing dan cm sup 2 ______________________________________zes 10 7.