| 摘要 |
PURPOSE:To obtain the titled article such as rubber hose or rubber joint with high heat and ozone resistance and weatherability by incorporating carbon black in a rubber component comprising organic rubber and specific polyorganosiloxane followed by curing and molding. CONSTITUTION:The objective article can be obtained by incorporating (I) 100pts. wt. of a rubber comprising (A) an organic rubber with a Mooney viscosity 20-150 (e.g., ethylene-propylene are rubber) and (B) a polyorganosiloxane of formula (R and R' are each hydrocarbon substituent; n >=100, pref. >=2,000) with >=6 (pref. 20-50)mol% of the substituents R and R' being such hydrocarbon substituent as to be >=350 (pref. >=700) in the Small's molecular attraction force constant (e.g., phenyl group) and 0.02-20mol% of the substituents being group having C=C bond in a weight ratio (A)/(B)=95/5-0/100 (pref. 80/20-20/80) with (C) 2-200 (pref. 5-100)pts.wt. carbon black with an average particle size <=1,000Angstrom followed by curing and molding.
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