| 摘要 |
Method for preparation of free-flowing composite particles by latex over-coagulation techniques. According to this procedure, a dispersion is initially prepared of elastomer particles. A second dispersion is also prepared containing a latex of nonelastomeric particles which have been swollen with an appropriate solvent. Both the above dispersion are thereupon combined whereby the swollen nonelastomeric particles become intimately associated with the elastomeric particles. Upon coagulation of the latex and dispersion, intimate association of the polymer particles contained therein is achieved. Revovery of the polymer particles is accomplished by filtration and the recovered particles ultimately dried. The product prepared in the above manner comprises a free-flowing mixture of (i) composite predominantly elastomer particles, (ii) particles substantially devoid of nonelastomeric materials and (iii) particles of nonelastomeric materials.
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