Description
Styrene-butadiene or styrene-butadiene rubber (SBR) describe families of synthetic rubbers derived from styrene and butadiene. These materials have good abrasion resistance and good aging stability when protected by additives. The SBR ratio influences the properties of the polymer: with high styrene content, the rubbers are harder and less rubbery.
SBR is derived from two monomers, styrene and butadiene. The mixture of these two monomers is polymerized by two processes: from solution (S-SBR) or as an emulsion (E-SBR). E-SBR is more widely used.
SBR is the most widely used synthetic elastomer. SBR demand is concentrated in durable goods, primarily automotive applications, such as tires and tire products, which account for about 70% of global consumption. Non-tire markets represent about 25–30% of SBR demand with applications in automotive components, mechanical parts, and a wide variety of other end uses. SBR’s main advantage in tire applications is that it provides longer life to tire treads.
SBR 1500
Applications: Tires, tube, cable, mechanical industries
| PARAMETER | TEST METHOD | UNIT | VALUE |
| Volatile Matter | ASTM D1416 | %wt | 0.75 max |
| Ash | ASTM D1416 | %wt | 1.5 max |
| Organic Acid | ASTM D416 | %wt | 5-7.25 |
| Soap | ASTM D1416 | %wt | 0.5 max |
| Bound Styrene | ASTM D1416 | %wt | 22.5-24.5 |
| Raw Viscosity (ML 1+4 @ 100°C) | ASTM D1646 | – | 46-58 |
| Compound Viscosity (ML 1+4 @ 100°C) | ASTM D1646 | – | 84 max |
| tensile Strength (35 Minutes Cure) | ASTM D412 | kg/cm2 | 250 min |
| Ultimate Elongation (35 Minutes Cure) | ASTM D412 | % | 470 min |
| 300% Modulus (35 Minutes Cure) | ASTM D412 | kg/cm2 | 119-159 |
| Volatile Matter | ASTM D1416 | %wt | 0.75 max |
SBR 1502
Applications: Shoes industries, bicycle tires, toy, tire,mechanical & cable industries
| PARAMETER | TEST METHOD | UNIT | VALUE |
| Volatile Matter | ASTM D1416 | %wt | 0.75 max |
| Ash | ASTM D1416 | %wt | 1.5 max |
| Organic Acid | ASTM D416 | %wt | 4.75-7 |
| Soap | ASTM D1416 | %wt | 0.5 max |
| Bound Styrene | ASTM D1416 | %wt | 22.5-24.5 |
| Raw Viscosity (ML 1+4 @ 100°C) | ASTM D1646 | – | 46-58 |
| Compound Viscosity (ML 1+4 @ 100°C) | ASTM D1646 | – | 84 max |
| tensile Strength (35 Minutes Cure) | ASTM D412 | kg/cm2 | 250 min |
| Ultimate Elongation (35 Minutes Cure) | ASTM D412 | % | 350 min |
| 300% Modulus (35 Minutes Cure) | ASTM D412 | kg/cm2 | 167-207 |
| Volatile Matter | ASTM D1416 | %wt | 0.75 max |
SBR 1712
Applications: Tires, tire coating, shoes industry,conveyor, hose
| PARAMETER | TEST METHOD | UNIT | VALUE |
| Volatile Matter | ASTM D1416 | %wt | 0.75 max |
| Ash | ASTM D1416 | %wt | 1.5 max |
| Organic Acid | ASTM D416 | %wt | 3.9-5.7 |
| Soap | ASTM D1416 | %wt | 0.5 max |
| Bound Styrene | ASTM D1416 | %wt | 22.5-24.5 |
| Raw Viscosity (ML 1+4 @ 100°C) | ASTM D1646 | – | 42-52 |
| Compound Viscosity (ML 1+4 @ 100°C) | ASTM D1646 | – | 62 max |
| tensile Strength (35 Minutes Cure) | ASTM D412 | kg/cm2 | 200 min |
| Ultimate Elongation (35 Minutes Cure) | ASTM D412 | % | 530 min |
| 300% Modulus (35 Minutes Cure) | ASTM D412 | kg/cm2 | 79-109 |
| Volatile Matter | ASTM D1416 | %wt | 0.75 max |
