Conductive composite particles and processes for the preparation thereof
First Claim
1. A process for the preparation of carrier particles which carrier particles consist of a core and a coating thereover, and wherein said coating is prepared by mixing at least one monomer with a polymerization initiator, a crosslinking component, and a chain transfer component;
- adding thereto an AB type block copolymer;
effecting bulk polymerization until from about 10 to about 50 weight percent of the monomer has been polymerized;
terminating polymerization by cooling the partially polymerized monomer;
adding thereto from about 1 to about 50 weight percent of a conductive filler, or conductive fillers, followed by mixing thereof;
dispersing the aforementioned mixture of conductive filler or fillers, and partially polymerized product in water containing a stabilizing component to obtain a suspension of particles with an average diameter of from about 0.05 to about 1 micron in water;
polymerizing the resulting suspension by heating;
subsequently optionally washing and drying the polymer product; and
subsequently mixing and heating said core and said polymer product wherein said polymer product forms a coating on said core, and wherein said polymer possesses an average particle diameter in the range of about 0.05 to about 1 micron.
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Accused Products
Abstract
A process for the preparation of conductive submicron polymeric particles which comprises mixing at least one monomer with a polymerization initiator, a crosslinking component, and a chain transfer component; adding thereto an AB type block copolymer; effecting bulk polymerization until from about 10 to about 50 weight percent of the monomer has been polymerized; terminating polymerization by cooling the partially polymerized monomer; adding thereto from about 1 to about 50 weight percent of a conductive filler, or conductive fillers, followed by mixing thereof; dispersing the aforementioned mixture of conductive filler or fillers, and partially polymerized product in water containing a stabilizing component to obtain a suspension of particles with an average diameter of from about 0.05 to about 1 micron in water; polymerizing the resulting suspension by heating; and subsequently optionally washing and drying the product.
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Citations
5 Claims
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1. A process for the preparation of carrier particles which carrier particles consist of a core and a coating thereover, and wherein said coating is prepared by mixing at least one monomer with a polymerization initiator, a crosslinking component, and a chain transfer component;
- adding thereto an AB type block copolymer;
effecting bulk polymerization until from about 10 to about 50 weight percent of the monomer has been polymerized;
terminating polymerization by cooling the partially polymerized monomer;
adding thereto from about 1 to about 50 weight percent of a conductive filler, or conductive fillers, followed by mixing thereof;
dispersing the aforementioned mixture of conductive filler or fillers, and partially polymerized product in water containing a stabilizing component to obtain a suspension of particles with an average diameter of from about 0.05 to about 1 micron in water;
polymerizing the resulting suspension by heating;
subsequently optionally washing and drying the polymer product; and
subsequently mixing and heating said core and said polymer product wherein said polymer product forms a coating on said core, and wherein said polymer possesses an average particle diameter in the range of about 0.05 to about 1 micron. - View Dependent Claims (2, 3, 4, 5)
- adding thereto an AB type block copolymer;
Specification