MC - 98 SULPHUR
Sulphur has been used as a rubber chemical since Charles Goodyear discovered its vulcanizing properties in the mid 1800's. Sulphur gives the compound hardness, allowing it to be moulded, but still retain its elasticity. Pencil erasers, rubber bumpers on automobiles, and latex gloves all use the same type of product, but in different quantities and heat variations. Rubbermaker's sulphur ready for shipment. Conditioning agents such as magnesium carbonate are added to improve flowability, handling, and dispersion characteristics of finely ground sulphur.
Sulphur from the Frasch Process
A significant amount of the world's sulphur supply came from sulphur-bearing limestone deposits found in the gulf coast region of the North American continent. The sulphur occurs at depths of 500 to 3,000 feet in domes subterraneous up-thrust by columns of salt. The Frasch process utilizes a steel tube made up of three concentric pipes that are driven underground to reach the sulphur deposit. Superheated water is then pumped down under great pressure in the outermost pipe to melt the sulphur. Air pressure from the innermost pipe forces the sulphur up the third pipe to the surface where it cools and solidifies.
MC-98 Sulphur is treated with magnesium carbonate (thus the ash content) to improve dispersibility and reduce caking. It has extremely fine particle size because sulphur has low solubility in nitrile rubber, MC-98 Sulphur Powder is used to gain maximum dispersion in NBR. However, MC-98 can be used in any sulphur curable polymer when optimum dispersion is desired. It will also benefit from the 325-mesh fineness of MC-98 Sulphur.
