Patent ID: 6548585
Filing Date: 2003-04-15
Classification: B29C,B29L,C08K,C08L,Y10T

Abstract:
A refrigerant hose comprising at least three layers of an inner tube, and outer cover, and a reinforcing layer between said inner tube and outer cover, said inner tube and/or outer cover of the hose being fabricated from a rubber composition comprising(A) 100 parts by weight of a brominated copolymer of a C4-7 isomonoolefin and a p-alkylstyrene wherein p-alkylstyrene content is 5 to 25% by weight, bromine content is at least 1.5% by weight, and the weight ratio of bromine unit to p-alkylstyrene unit is such that 0.15(B) 0.1 to 10 parts by weight of zinc white; (C) 1 to 15 parts by weight of brominated alkylphenol resin; and (D) 20 to 150 parts by weight of talc as an inorganic laminar compound wherein the hose has a refrigerant gas impermeability of less than 8.0 mg.mm/24 hr.cm2 and has a compression set resistance of up to 50% after being subjected to 25% compression at 120Â° C. for 70 hours and a compression set resistance of up to 70% after being subjected to 25% compression at 150Â° C. for 70 hours.