Buna® SE

Emulsion Styrene Butadiene Rubber (E-SBR)

The Buna® SE product group comprises the general purpose emulsion styrene-butadiene rubbers (E-SBR) which is one of the most important types of synthetic rubber. Emulsion Styrene Butadiene Rubber is the most widely used rubber in the world, representing about 40% of the synthetic rubber market, which is a result of its excellent balance of properties and cost performance.
A typical E-SBR has 23,5% styrene with random distribution of the monomers in the polymer chain. Increasing the styrene content the processability is improved, as also is the tensile strength, but the resistance to low temperature and wear deteriorates. E-SBR presents a broad molecular weight distribution and a high degree of branching, so it processes easier than solution SBR.
Buna® SE is produced by a cold (5 to 10°C) free radical polymerization mechanism, in which the monomers are emulsified in an aqueous medium with rosin and/or fatty acids. The monomers react and form a latex, which is then coagulated to generate the solid rubber. The products are available in clear or oil extended grades, with staining or non staining antioxidant.

Buna® SE presents good mechanical properties, abrasion and tear resistance, being largely used in tire, retread, footwear soles, hoses, tubes, cables, conveyor belts and a great variety of moulded, calendered and extruded rubber goods. More than half of the world production of E-SBR is used principally in general purpose tires.

The Buna® SE product portfolio contains adjusted types which fullfill the actual requirements for the tire industry in regard of environment friendly oils. Different stabilisation systems allows the customer to use the products in color sensitive applications.

Main Grades

Buna®Styrene[%]Mooney 1+4oilstabilisation
SE 150023,552nonestaining
SE 1502 H23,553nonenon-staining
SE 1502 L23,549nonenon-staining
SE 1712 TE 23,55137,5 phr TRAEstaining
SE 1721 TE405537,5 phr TRAEstaining

Contact

Marcus Moutinho
Technical Service - LATAM

Phone: +55 21 2677 1219

Judy Douglas
Technical Service - NAFTA

Phone: +1 412 809 3547

David Hardy
Technical Service - EMEA

Phone: +49 221 8885 6307

Esther Han
Technical Service - APAC

Phone: +65 6725 5777