HYDROGENATED NITRILE RUBBER-BASED SEAL MOLDING MATERIAL FOR R152a AND R134a

摘要

PROBLEM TO BE SOLVED: To provide a seal molding material excellent in resistance to the refrigerants R152a and R134a and to any of the refrigerating machine and assembling oils and the like using the refrigerants.;SOLUTION: The seal molding material for R152a and R134a is based on a hydrogenated nitrile rubber, and contains, to 100 pts.wt. of a hydrogenated nitrile rubber having a boned acrylonitrile content of 31 to 45 wt.%, (1) 40 to 150 pts.wt. of carbon black having a particle diameter of 25 to 500 nm (as based on ASTM D1765-94a), (2) 40 to 150 pts.wt. of white carbon having a specific surface area of 30 to 200 m² (as measured by a nitrogen adsorption method) and 0.1 to 5 pts.wt. of a silane coupling agent, or (3) 10 to 140 pts.wt. of the above carbon black, 10 to 140 pts.wt. of the above white carbon (however, the total amount of the carbon black and white carbon is 40 to 150 pts.wt.), 0.1 to 5 pts.wt. of a silane coupling agent, and 0.5 to 10 pts.wt. of an organic peroxide.;COPYRIGHT: (C)2004,JPO&NCIPI