| 摘要 |
Provided are: a rubber composition with which a vulcanizate of favorable formability and excellent thermal and ozone resistance can be obtained; and a manufacturing method and a vulcanizate thereof. The rubber composition is obtained by adding: 100 parts by mass of a blended rubber comprising 50-90 mass% of chloroprene rubber and 10-50 mass% of chlorinated polyethylene; 4.5-15 parts by mass of a primary vulcanizing agent for vulcanizing the chloroprene rubber and chlorinated polyethylene; and 0.5-3.5 parts by mass of a secondary vulcanizing agent for vulcanizing the chloroprene rubber. The secondary vulcanizing agent is added simultaneously with the primary vulcanizing agent or after the primary vulcanizing agent. For the primary vulcanizing agent, at least one oxide selected from magnesium oxide, calcium oxide, potassium oxide and hydrotalcite is used. For the secondary vulcanizing agent, at least one oxide selected from zinc oxide, iron oxide, lead oxide and titanium oxide is used. |
