Conductive particles containing carbon black and processes for the preparation thereof
First Claim
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1. A process for the preparation of conductive particles, comprising:
- (a) mixing a monomer, carbon black, and a block copolymer, wherein said block copolymer comprises an A block that is miscible with the monomer, and a B block that anchors to the surface of the carbon black;
(b) adding a polymerization initiator to the mixture of step (a);
(c) effecting bulk polymerization of the mixture of step (b) until about 5 to about 30 weight percent of the monomer has been polymerized;
(d) dispersing the partially polymerized product in water; and
(e) polymerizing the resulting dispersion.
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Abstract
Conductive polymeric particles can be formed by mixing a monomer, carbon black and a block copolymer, wherein the block copolymer contains an A block that is miscible with said monomer and a B block that anchors to the surface of the carbon black, such as polystyrene or a derivative of polystyrene. A polymerization initiator is added to the mixture and bulk polymerization is effected until about 5 to about 30 weight percent of the monomer has been polymerized. This partially polymerized product is then dispersed in water and further polymerized.
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15 Claims
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1. A process for the preparation of conductive particles, comprising:
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(a) mixing a monomer, carbon black, and a block copolymer, wherein said block copolymer comprises an A block that is miscible with the monomer, and a B block that anchors to the surface of the carbon black; (b) adding a polymerization initiator to the mixture of step (a); (c) effecting bulk polymerization of the mixture of step (b) until about 5 to about 30 weight percent of the monomer has been polymerized; (d) dispersing the partially polymerized product in water; and (e) polymerizing the resulting dispersion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification