EPDM RUBBER COMPOSITION EXCELLENT IN ADHESION TO BRASS, AND HOSE COVER EXCELLENT IN PREVENTION OF BULGING

摘要

PURPOSE:To improve the adhesion to brass, heat resistance, weatherability, and prevention of bulging by compounding an ethylene.propylene.diene terpolymer, an org. peroxide vulcanizing agent, and a 6-R-2,4-dimercapto-1,3,5- triazine. CONSTITUTION:The title compsn. is prepd. by compounding: 100 pts.wt. ethylene.propylene.diene terpolymer of formula I (wherein (l), (m), and (n) are each a positive integer; and X is a diene monomer); an org. peroxide vulcanizing agent (e.g. dicumyl peroxide) in an amt. of 8.0X10-3-25.0X10-3mol in terms of the available active oxygen; and a 6-R-2,4-dimercapto-1,3,5-triazine of formula II (wherein R is mercapto, alkoxy, mono- or dialkylamino, mono- or dicycloalkylamino, mono- or diarylamino, or N-alkyl-N-arylamino) in an amt. of 0.1-1.5mol based on 1mol of available active oxygen of the peroxide.