SBR–1502 is a cold, 23.5% styrene SBR polymer made with a mixed–acid emulsifier, a non-staining stabilizer and a salt–acid coagulation. Provided that the compounds are formulated and processed correctly, the vulcanizates have very good abrasion , good heat and aging resistance, good mechanical properties , good electrical properties and good resistance to polar solvents and dilute acids.
Testing Item | Index | Test Method | |||
Superior Grade | First Grade | Qualified | |||
Volatile matter(%)≤ | 0.60 | 0.75 | 0.90 | GB/T6737 | |
Ash content | ≤0.50 | GB/T4498A | |||
Organic acid(%) | 4.50~6.75 | GB/T8657A | |||
Soap content(%) | ≤0.5 | ||||
Combinated Styrene content(%) | 22.5~24.5 | GB/T8658 | |||
Raw rubber mooney viscosity ML(1+4)100°C | 45~55 | 44~56 | GB/T1232.1 | ||
Compounded rubber mooney viscosity ML(1+4)100°C≤ | 93 | ||||
300% Stretching Stress (145°C)/MPa | 25min | 15.2~19.1 | 14.7~19.6 | GB/T8656A | |
35min | 20.6±2.0 | 20.6±2.5 | |||
50min | 21.5±2.0 | 21.5±2.5 | |||
Tensile strength (145°C, 35min)/MPa | ≥25.5 | ≥25.5 | ≥24.5 | ||
Elongationg at break (145°C, 35min)/% | ≥340 | ≥330 | |||
Tires, conveyor belt, rubber tube, light color soles, rubber pads, rice milling roller, extrusion products and other industrial products using carbon black.
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