Vacuum de-aerated powdered polymer additives
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United States of America Patent
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May 29, 2001
Grant Date -
N/A
app pub date -
Oct 18, 1999
filing date -
Apr 23, 1999
priority date (Note) -
Expired
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Abstract
Increased bulk density of powdered flame retardants, flame retardant synergists and other powdered polymer additives substantially improves the processing, dispersibility, and properties of the processed polymer. Processing improvements include faster processing, more homogeneous additive dispersion throughout the polymer, less swell, and reduction or elimination of drool. Formed parts containing the increased bulk density flame retardant and flame retardant synergists are more consistent with respect to density, wall thickness, and more homogeneous and consistent flame retardancy. Physical properties such as flammability test performance and/or impact strength are also enhanced.
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