in rubber chemistry while working with natural rubber formulas, there is usually a certain comfort level with natural rubber. Most natural rubber is produced from a softwood tree native to Brazil, though several other species of trees and shrubs are sources of rubber as well. Natural rubber. • Trees: Hevea Brasiliensis and Castilloa elástica. In the Asia-Pacific region, China accounts for a lion share of the region’s synthetic rubber market. Although Natural Rubber, with the benefit of modern compounding, is very satisfactory for many applications, it is also a strategically important material, a natural crop only produced in tropical countries and has relatively poor ageing properties. Natural Rubber. For example, eco-friendly winter tires such as the Nokian Hakkapeliitta R2 use silica, derived from sand, for extra grip, along with canola oil and natural rubber to remain soft even in extreme temperatures. Forms of polyisoprene that are used as natural rubbers are classified as elastomers. According to the US Rubber Manufacturer’s Association, about 70 per cent of all rubber used is synthetic rubber. Natural rubber, synthetic rubber and neoprene rubber 1. Depending on the chemicals added and the properties associated with it, the synthetic rubber can be as hard as a bowling ball or as resilient as a rubber band or as soft as a sponge. 27th September, 2017. Natural rubber is from the monomer isoprene (2-methyl-1,3-butadiene), which is a conjugated diene hydrocarbon as mentioned above. Whether natural or synthetic, rubber continues through four steps: compounding, mixing, … Both natural rubber and synthetic rubber (IR) have high tear resistance, good low temperature flexibility, and high tensile strength. There are two types of rubber — Natural Rubber and Synthetic Rubber. The importance of the rubber industry from the time it came into being and the role that it has played in the growth of civilization has been enormous. It is an elastic substance which can be obtained both by naturally (natural rubber) or they can also be synthesized chemically in laboratories (synthetic rubber-like butyl rubber, neoprene, etc.) Synthetic rubber derives from molecular polymers. Whereas, synthetic rubber is an artificial elastomer that is synthesized from petroleum products. SBR is more resistant to abrasion and oxidation than natural rubber and can also be vulcanized. Therefore, this Solutions brochure will discuss less of the compounding of natural rubber and focus more on the natural rubber products that Akrochem offers – both the general purpose, technically specified branched polymer with a high molecular weight (MW) and a broad molecular weight distribution (MWD). A tiny amount is used for bubble-gum in the unvulcanized form.