Types of SBR:
The SBR is a polymer derived from two monomers – styrene and butadiene. The polymerization can be conducted by using two distinct processes hence two different types of SBR are produced namely S-SBR (Solution-SBR) and E-SBR (Emulsion-SBR).
Properties of SBR:
Most of the chemical and physical properties of the SBR resemble the natural rubber (NR). However, there are a few distinguishing features that make it better than the NR:
The SBR has better resistance to heat than NR; however, it has poorer tear strength and fatigue resistance in comparison to NR sheets.
It has excellent abrasion resistance, tensile strength and ageing ability when protected by additives which makes it an excellent choice for tyres in automobile industry.
Also, it is extremely flexible, tough and multifaceted adding to its properties for usage in automotive, coal mining and construction industries.
Uses of SBR:The automobile industry:
More than 50% of the automobile industry uses SBR for the manufacture of car and truck tyres.
Shoe heels and soles
It is used as a resin to bind pigmented coatings on papers.
Speaker driver manufacturers it as a material for low damping rubber surrounds in the speakers.
Building or construction application:
Sealing and binding agent behind renders as it has the properties of extreme durability, reduced shrinkage and increased flexibility along with being resistant to emulsification in damp areas.
Used for “tanking” damp rooms or surfaces especially for basement constructions.