A sulfur-modified polychloroprene rubber with medium crystallization rate.Used in manufacture of rubber products such as cable shield,V-belt and synchronous belt.It is similar to Du Pont's neiprene GNA and Denka's PM-40 Specifications: 1)Mooney scorch MSt5.min: A:30 B:25 C:20 2)Tensile strength,Mpa ≥:A:24 B:22 C:20 3)Modulus at 500%,Mpa:1-5 4)Elongation at break,% ≥:A:900 B:850 C:800 5)Volatile matter,% ≤:A:1.0 B:1.2 C:1.2 6)Ash content,%≤: A1.0 B:1.2 C:1.2 7)Mooney viscosity:CR1211 30-45 CR1212 46-60