Polymer Encapsulation of High Aspect Ratio Materials and Methods of Making Same
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Accused Products
Abstract
A pigment contains one or more substantially spherical-shaped beads. Each substantially spherical-shaped bead includes one or more high aspect ratio particles encapsulated within an encapsulating material. Resinous compositions containing this pigment and a plastic, for example a polycarbonate, have a flowline-free colored, sparkling and/or metallescent appearance.
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Citations
73 Claims
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1-58. -58. (canceled)
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59. A method of preparing an encapsulated pigment composition via suspension polymerization, the encapsulated pigment composition comprising one or more substantially spherical-shaped beads, wherein the substantially spherical-shaped beads comprise one or more high aspect ratio particles encapsulated within an encapsulating material, the method comprising the steps of:
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dispersing high aspect ratio particles in at least one of a monomer or a polymer and a cross-linking agent to form a suspension mixture;
adding the suspension mixture to an aqueous mixture comprising a suspension agent;
heating and mixing the aqueous reaction mixture to encourage the formation of substantially spherical-shaped beads, wherein most of the substantially spherical-shaped beads encapsulate one or more high aspect ratio particles to an extent that the high aspect ratio particles will not become delaminated during processing;
quenching the aqueous reaction mixture after the substantially spherical-shaped beads are formed; and
collecting the substantially spherical-shaped beads. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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Specification