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Specialty polyisoprene natural rubbers.

Superpoly (SP) represents a line of specialty polyisoprene natural rubber products that are partially precrosslinked, high performance elastomers available in bale form. These elastomers are produced by blending specific proportions of vulcanized and unvulcanized natural rubber during the latex phase of production.

Latex phase blending is said to ensure a homogeneous, uniform mix of the two components. Due to their unique two-phase structure, SP natural rubbers are very clean, light in color and contain low levels of volatile matter, according to the company.

Superpoly natural rubbers are used in quality formulations as either the sole elastomer or as a blend (process aid) with other natural or synthetic elastomers. These natural rubbers are said to have the ability to improve flow characteristics and increase mix viscosities, which are said to be advantageous for mixing, preforming and molding rubber.

For extruded goods, SP is said to create faster throughput, low die swell, smooth surfaces and increased dimensional stability. Applications include wiper blades, tubing, hoses, sponge, surgical articles, gaskets, windscreen seals, etc.

For calendered parts, SP is said to reduce shrinkage, improve surface finish and gauge consistency. With the use of SP, molded goods are said to benefit from less air and volatile entrapment (blisters), gauge consistency, surface appearance, etc. This grade has the ability to maintain a lower solution viscosity.

Akrochem Circle 13 on card
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Title Annotation:Up Front
Publication:Rubber World
Date:Jun 22, 2006
Words:223
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