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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0083146 (1993-06-25) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 298 인용 특허 : 0 |
A process for the preparation of toner compositions with a volume median particle size of from about 1 to about 25 microns, which process comprises: (i) preparing by emulsion polymerization an anionic charged polymeric latex of submicron particle size, and comprised of resin particles and anionic su
A process for the preparation of toner compositions with a volume median particle size of from about 1 to about 25 microns, which process comprises: (i) preparing by emulsion polymerization an anionic charged polymeric latex of submicron particle size, and comprised of resin particles and anionic surfactant; (ii) preparing a dispersion in water, which dispersion is comprised of optional pigment, an effective amount of cationic flocculant surfactant, and optionally a charge control agent; (iii) shearing the dispersion (ii) with the polymeric latex thereby causing a flocculation or heterocoagulation of the formed particles of optional pigment, resin and charge control agent to form a high viscosity gel in which solid particles are uniformly dispersed; (iv) stirring the above gel comprised of latex particles, and oppositely charged dispersion particles for an effective period of time to form electrostatically bound relatively stable toner size aggregates with narrow particle size distribution; and (v) heating the electrostatically bound aggregated particles at a temperature above the resin glass transition temperature (Tg) thereby providing the toner composition comprised of resin, optional pigment and optional charge control agent.
A process for the preparation of toner compositions with a volume median particle size of from about 1 to about 25 microns, which process comprises: (i) preparing by emulsion polymerization an anionic charged polymeric latex of submicron particle size, and comprised of resin particles and anionic su
A process for the preparation of toner compositions with a volume median particle size of from about 1 to about 25 microns, which process comprises: (i) preparing by emulsion polymerization an anionic charged polymeric latex of submicron particle size, and comprised of resin particles and anionic surfactant; (ii) preparing a dispersion in water, which dispersion is comprised of pigment, an effective amount of cationic flocculant surfactant, and optionally a charge control agent; (iii) shearing the dispersion (ii) with said polymeric latex thereby causing a flocculation or heterocoagulation of pigment, resin and charge control agent to form a high viscosity gel in which particles of pigment, resin and optional charge control agent are uniformly dispersed; (iv) stirring the above gel for an effective period of time to form electrostatically bound relatively stable toner size aggregates with narrow particle size distribution; and (v) heating the electrostatically bound relative stable toner size aggregates at a temperature above the resin glass transition temperature (Tg) thereby providing said toner compositions comprised of resin, pigment and optional charge control agent.
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