Preparation of resin encapsulated crumb rubber
Abstract
Abstract A RESINOUS, DUST-FREE SEMICONTINUOUS, ADHERENT COATING-TYPE PARTITIONING AGENT FOR ELASTOMERIC CRUMB OR ELASTOMER BONDED PARTICLES IS PREPARED BY SLOWLY ADDING TOGETHER A DILUTE RESIN LATEX AND A DILUTE COAGULATING AGENT (THE ELASTOMERIC PARTICULATE BEING SLURRIED IN ONE OR THE OTHER OF THESE INGREDIENTS) AT A TEMPERATURE NEAR OR ABOVE THE AGGLOMERATING TEMPERATURE OF THE RESIN. UNDER THESE CONDITIONS, THE RESIN COAGULATES SLOWLY AND IS COINCIDENTALLY DEPOSITED ON THE SURFACE OF THE ELASTOMERIC PARTICLES, BECOMING SINTERED SO THAT ESSENTIALLY NONE OF THE RESIN IS FREE TO FORM A SEPARATE PHASE. PREFERRED COATING RESINS ARE STYRENEBUTADIENE COPOLYMERS CONTAINING AT LEAST 80% STYRENE. THREE TO TEN PERCENT OF RESIN BY WEIGHT OF PRODUCT PROVIDES ADEQUATE PARTITIONING UNDER NORMAL CONDITIONS.
Inventors
- 👤 T Neubert
Bibliographic Details
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