| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polychloroprene composition and a laminate rubber bearing capable of reducing intensity of vibration (acceleration) in short time when earthquake motion is added.SOLUTION: Polychloroprene of 100 pts.mass and carbon black having DBP oil absorption amount of 60 to 95 ml/100 g of 10 to 60 pts.mass are blended to provide a polychloroprene composition. Polychloroprene is a mixture of polychloroprene A having the amount of a 2,3-dichloro-1,3-butadiene bond unit of less than 10 mass% and polychloroprene B having the amount of a 2,3-dichloro-1,3-butadiene bond unit of 10 to 30 mass% with its blending ratio of polychloroprene A:polychloroprene B=10:90 to 70:30 by mass ratio and the amount of 2,3-dichloro-1,3-butadiene bond unit per the total mass of polychloroprene is 10 to 30 mass%. A laminate rubber bearing is formed by using the polychloroprene composition.</p> |
