Process for preparation of conductive polymeric composite particles
First Claim
1. A process for the preparation of polymer which comprises effecting a bulk polymerization of a mixture containing about 50 to about 99 percent of at least one monomer, about 0.01 to about 1 percent of a chain transfer agent, about 0.1 to about 5 percent of a crosslinking agent, about 1 to about 50 percent of a conductive additive, about 0.1 to about 3 percent of a free radical redox polymerization initiator pair, and about 0.1 to about 5 percent of at least one additional other initiator until from about 4 to about 50 weight percent of the monomer has been polymerized and one or both components in the the redox initiator pair has been consumed;
- dispersing with a high shear mixer, at about 1,000 to about 20,000 rpm, 100 parts of the aforementioned partially polymerized mixture in about 200 to about 500 parts water containing about 0.01 to about 10 percent of a stabilizing component selected from the group consisting of nonionic and ionic water soluble polymeric stabilizers to obtain a suspension of particles;
polymerizing the resulting suspension by heating to between about 45°
to about 120°
C.; and
optionally subsequently isolating, washing and drying the polymer additive product, and wherein said redox polymerization initiator pair is comprised of a peroxide oxidizing agent, and a reducing agent wherein the oxidizing agent is benzoyl peroxide, lauroyl peroxide, 1-1-(t-butylperoxy)-3,3,5-trimethylcyclohexane, n-butyl-4,4-di-(t-butylperoxy)valerate, or dicumyl peroxide, and wherein the reducing agent is the amine triethylamine, or diethylamine, is the aniline dimethylaniline, or diethylaniline, or is carbon black with a reducing agent on its surface.
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Abstract
A process for the preparation of polymer which comprises effecting a bulk polymerization of a mixture containing at least one monomer, a chain transfer agent, a crosslinking agent, a free radical redox polymerization initiator pair, and at least one additional free radical initiator until from about 4 to about 50 weight percent of the monomer has been polymerized and one or both components in the redox initiator pair has been consumed; dispersing with a high shear mixer the aforementioned partially polymerized mixture in water containing a stabilizing component selected from the group consisting of nonionic and ionic water soluble polymeric stabilizers to obtain a suspension of particles; polymerizing the resulting suspension; and optionally subsequently insulating, washing and drying the polymer product.
37 Citations
28 Claims
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1. A process for the preparation of polymer which comprises effecting a bulk polymerization of a mixture containing about 50 to about 99 percent of at least one monomer, about 0.01 to about 1 percent of a chain transfer agent, about 0.1 to about 5 percent of a crosslinking agent, about 1 to about 50 percent of a conductive additive, about 0.1 to about 3 percent of a free radical redox polymerization initiator pair, and about 0.1 to about 5 percent of at least one additional other initiator until from about 4 to about 50 weight percent of the monomer has been polymerized and one or both components in the the redox initiator pair has been consumed;
- dispersing with a high shear mixer, at about 1,000 to about 20,000 rpm, 100 parts of the aforementioned partially polymerized mixture in about 200 to about 500 parts water containing about 0.01 to about 10 percent of a stabilizing component selected from the group consisting of nonionic and ionic water soluble polymeric stabilizers to obtain a suspension of particles;
polymerizing the resulting suspension by heating to between about 45°
to about 120°
C.; and
optionally subsequently isolating, washing and drying the polymer additive product, and wherein said redox polymerization initiator pair is comprised of a peroxide oxidizing agent, and a reducing agent wherein the oxidizing agent is benzoyl peroxide, lauroyl peroxide, 1-1-(t-butylperoxy)-3,3,5-trimethylcyclohexane, n-butyl-4,4-di-(t-butylperoxy)valerate, or dicumyl peroxide, and wherein the reducing agent is the amine triethylamine, or diethylamine, is the aniline dimethylaniline, or diethylaniline, or is carbon black with a reducing agent on its surface. - View Dependent Claims (6, 10)
- dispersing with a high shear mixer, at about 1,000 to about 20,000 rpm, 100 parts of the aforementioned partially polymerized mixture in about 200 to about 500 parts water containing about 0.01 to about 10 percent of a stabilizing component selected from the group consisting of nonionic and ionic water soluble polymeric stabilizers to obtain a suspension of particles;
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2. A process for the preparation of conductive polymer particles which comprises effecting at a low temperature heating of between 0°
- to about 70°
C. bulk polymerization of a mixture of at least one monomer, a conductive filler, free radical redox polymerization initiator pair components, and at from about 1 to 10 weight percent other free radical initiator, or initiators until from about 4 to about 50 weight percent of the monomer has been polymerized and one or both components in the the redox initiator pair has been consumed;
optionally adding additional free radical initiator, which is the same as or different from said other free radical initiator;
dispersing with a high shear mixer the aforementioned partially polymerized mixture in water containing a stabilizing component selected from the group consisting of nonionic and ionic water soluble polymeric stabilizers to obtain a suspension of particles with an average diameter of from about 0.05 to about 5 microns;
polymerizing the resulting suspension to form polymer the conductive particles; and
subsequently optionally isolating, washing and drying the conductive polymer particles, and wherein said redox polymerization initiator pair is comprised of a peroxide oxidizing agent, and a reducing agent wherein the oxidizing agent is benzoyl peroxide, lauroyl peroxide, 1-1-(t-butylperoxy)-3,3,5-trimethylcyclohexane, n-butyl-4,4-di-(t-butylperoxy)valerate, or dicumyl peroxide, and wherein the reducing agent is the amine triethylamine, or diethylamine, is the aniline dimethylaniline, or diethylaniline, or is carbon black with a reducing agent on its surface. - View Dependent Claims (3, 4, 5, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28)
- to about 70°
-
27. A process for the preparation of polymer which comprises effecting a bulk polymerization of a mixture containing at least one monomer, a chain transfer agent a crosslinking agent, a carbon black filler additive, a free radical redox polymerization initiator pair, and a third free radical initiator until from about 4 to about 50 weight percent of the monomer has been polymerized and one or both components in the redox initiator pair has been consumed;
- optionally adding additional free radical initiator;
which is the same as or different from said third free radical initiator;
dispersing with a high shear mixer the aforementioned partially polymerized mixture in water containing a stabilizing component selected from the group consisting of nonionic and ionic water soluble polymeric stabilizers to obtain a suspension of particles;
polymerizing the resulting suspension; and
subsequently isolating, washing and drying the polymer carbon black product; and
wherein said carbon black is dispersed in said polymer, and wherein said redox polymerization initiator pair is comprised of a peroxide oxidizing agent, and a reducing agent wherein the oxidizing agent is benzoyl peroxide, lauroyl peroxide, 1-1-(t-butylperoxy)-3,3,5-trimethylcyclohexane, n-butyl-4,4-di-(t-butylperoxy)valerate, or dicumyl peroxide, and wherein the reducing agent is the amine triethylamine, or diethylamine, is the aniline dimethylaniline, or diethylaniline, or is carbon black with a reducing agent on its surface.
- optionally adding additional free radical initiator;
Specification