Vulcanization Vulcanization Vulcanization (British: vulcanisation) is a chemical process used to harden rubber. Vulcanization traditionally referred to the treatment of natural rubber with sulfur and this remains the most common example, however the term has also grown to include the hardening of other (synthetic) rubbers via various means. Examples include silicone rubber via room temperature vulcanizing and chloroprene rubber (neoprene) using metal oxides. Vulcanisation can therefore be defined as the curing of elastomers; with the terms 'vulcanization' and 'curing' sometimes used interchangeably in this context. It works by forming cross-links between sections of polymer chain which results in increased rigidity and
Union Sulphur Company the Supreme Court, which declined to review the Third Circuit opinion. The competitors were free to use the Frasch Process. The Union Sulphur Company continued to extract sulfur, averaging over 200,000 tons per year from 1905 to 1911 and eventually producing a total of almost 9.5 million tons. Sulfur has many industrial uses, including as sulfuric acid and in the manufacture of explosives, among others. The Union Sulphur Company, as the primary source of sulfur in the U.S. before and during World War I, was critical to the U.S. war effort. As the legal battle over the expiration of its