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US 2019/0168186 A1Published application
Reduced polymer content and bonding in polymer particulate composite
AssigneeTundra Composites, LLC
InventorKurt Heikkila
Life of this patent
Estimating the term…
Abstract
Disclosed is a composite of a particulate and polymer, the composite characterized by less than enough polymer to fully occupy the available excluded volume of the particulate of the composite. The resulting composite is characterized by the particulate partially covered by the polymer leaving a substantial surface area uncovered.
Claims18
1-17. (canceled)
A friable extruded composite comprising
- (a) a polymer phase,
- (b) a dispersed particulate phase comprising particulate having a particle surface, the particulate phase being present in an amount of at least the critical packing volume in the polymer,
- (c) a coating comprising an interfacial modifier on the particle surface, and
- (d) a distribution of void spaces within the polymer phase, wherein the void spaces leave the particle surface exposed, and wherein a proportion of the void spaces is up to 40 vol. % of the composite.
1 more element
A method of making a friable solid composite comprising steps of:
- (a) introducing particulate and a polymer into a compounding extruder, the particulate comprising particles having a particle surface and an interfacial modifier on the particle surface, the particulate and polymer being introduced in relative amounts sufficient to provide a particulate content of at least a critical packing volume in the polymer and greater than 60 vol. % of the composite, and a bulk density of less than 95% of a filled polymer and (b) forming the composite at a temperature greater than a melting temperature of the polymer.
Dependencies are inferred from the claim text.