Styrene-Butadiene Rubber
SBR, or Styrene-butadiene rubber, is the most consumed synthetic rubber, widely used in place of natural rubber for similar applications. SBR is a general purpose rubber made up of 25% styrene and 75% butadiene joined in a co-polymer. The styrene added makes SBR cheaper while adding bonding and blending capabilities. The styrene also lends SBR its wear and abrasion resistance, as well as its strength.
How it’s produced
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)
- Emulsion SBR is quickly growing in popularity, with both hot and cold production types that change the properties of the rubber. However, emulsion SBR has good abrasion resistance while functioning better at lower temperatures. However, it also has low resilience, tensile strength, and tear strength. o Hot emulsion SBR has more of a branching polymer than cold emulsion SBR, which makes it better for extrusion, more stable, and less shrinkable. o Cold emulsion SBR is more abrasion resistant and has more tensile strength.
- Solution SBR still makes up roughly 75% of all SBR produced, with a higher molecular weight and a smaller molecular weight distribution. This material has better flexibility and tensile strength with lower rolling resistance than emulsion SBR, and is also more expensive.
SBR Rubber Properties
SBR rubber is so widely used because of its cheapness and availability, although it also has high tensile and impact strength, resilience, and abrasion resistance. It’s flexible in low temperatures and has decent heat resistance as well. SBR is also water, organic acid, ketone, chemical, alcohol, and aldehyde resistant. This type of rubber also ages better than natural rubber and is crack resistant while able to accommodate large amounts of filler, which is used to enhance its properties.
- Carbon black gives SBR enhanced strength, as well as more abrasion and UV resistance.
- China clay also adds strength and reinforcement, and is used for rubbers that aren’t black.
- Calcium carbonate is added to make the final product cheaper.
- Silica gives SBR better thermal conductivity, electrical insulation, and dimensional stability.
- Filaments keep the rubber from being too stretchy in the finished product.
However, SBR is one of the weaker rubbers without fillers. This type of rubber is vulnerable to ozone, oxidation, fatigue, solvent, and weathering. Compared to natural rubber it also has low resilience and bad tear strength, especially under high temperatures. SBR also swells and weakens from hydrocarbon oils.
Grades & Applications
Suitable for automobile and motorcycle tires, conveyer belt, rubber hose, the black sole, rubber liner, cylinder of rice crusher.
Suitable for the distinct color and transparent products, automobile and motor cycle tire, light transparent sole, cyliner of rice crusher.
Suitable for automobile and motorcycle tire, conveyer belt, rubber hose and other black industrial rubber materials.
Suitable for automobile and motorcycle tire, conveyer belt, rubber hose and other black industrial rubber materials.
Technical Data Sheet
Tulsiram Hanumanbagas Gilada (THG), is a leading trade house for Synthetic Rubbers and Rubber Chemicals. Established and Lead by Mr Ramakant Gilada 3 decades ago at Hyderabad and later expanded to all over South India.
Contact Us
- thghyd@gmail.com
- +91 7893883141
Copyright © 2024 Tulsiram HanumanBagas Gilada. All Rights Reserved.
