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Absorbed Peroxides.

U.S. Patent 7,160,958 (January 9, 2007), "Method of Increasing the Absorption Rate of Peroxides Into Polymer Particles," Peter R. Dluzneski (GEO Specialty Chemicals, Inc., Lafayette, Indiana, USA).

Peroxide compounds are commonly used to crosslink polymers. For electric-cable insulation, the peroxides are added to polymer particles through an absorption or coating process for crosslinking after fabrication. The polymer particles with the peroxide are used to coat conductor wires or bundles, cooled to room temperature, and stored for later crosslinking. Solid polymer particles are mixed with the peroxide, such as dicumyl peroxide, above the melting point of the peroxide but below the softening point of the polymer particles. However, the absorption rate is slow and unreliable. Branched hydrocarbon oil such as squalane, a polyterpene hydrocarbon from shark livers, can increase the absorption rate, making the process quicker and more reliable. Other additives include low-molecular-weight polybutene and mineral oil.
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Title Annotation:industry PATENTS
Author:Corneliussen, Roger
Publication:Plastics Engineering
Article Type:Brief article
Geographic Code:1USA
Date:Mar 1, 2007
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