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公开(公告)号：DE68924884T2
公开(公告)日：1996-05-15
申请号：DE68924884
申请日：1989-08-11
Applicant: XEROX CORP
Inventor： FULLER TIMOTHY J , NELSON ROBERT A , SMITH THOMAS W , MCGRANE KATHLEEN M , PREST WILLIAM M , AHUJA SURESH K
Abstract: A toner composition comprised of resin particles of a semicrystalline polyolefin or copolymers thereof with a melting point of from 50 DEG C to 100 DEG C, and pigment particles.
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公开(公告)号：GB2245376A
公开(公告)日：1992-01-02
申请号：GB9111090
申请日：1991-05-22
Applicant: XEROX CORP
Inventor： NELSON ROBERT A
IPC: G03G9/087
Abstract: A toner comprised of a resin blend containing (1) at least one resin which is crosslinked (2); pigment (3); wax component and (4) charge enchancing additive; and (5) an additive on the surface of the resin blend particle. The resin (1) may be a styrene acrylate or styrene butadiene crass-linked with a divinyl benzene and the resin may be admixed with an uncrosslinked polymer such as a styrene butadiene. The wax component (3) may be a polyethylene or polypropylene wax, the charge enhancer (4) may be a quaternary ammonium salt and the surface additive (5) may be silica, a metal oxide or a metal soap. The addition of (5) improves the toner flow.
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公开(公告)号：ES2081304T3
公开(公告)日：1996-03-01
申请号：ES89308169
申请日：1989-08-11
Applicant: XEROX CORP
Inventor： FULLER TIMOTHY J , NELSON ROBERT A , SMITH THOMAS W , MCGRANE KATHLEEN M , PREST WILLIAM M JR , AHUJA SURESH K
Abstract: A toner composition comprised of resin particles of a semicrystalline polyolefin or copolymers thereof with a melting point of from 50 DEG C to 100 DEG C, and pigment particles.
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公开(公告)号：DE3372411D1
公开(公告)日：1987-08-13
申请号：DE3372411
申请日：1983-12-23
Applicant: XEROX CORP
Inventor： NELSON ROBERT A
Abstract: A positively charged electrostatographic toner composition comprising (1) a styrene butadiene coplymer plasticizer blend, containing from about 92 percent by weight to about 97 percent by weight of styrene butadiene copolymer, and from about 3 percent by weight to about 8 percent by weight of plasticizer, the styrene butadiene copolymer having a weight average molecular weight of from about 45,000 to about 155,000, and a molecular weight distribution of about 7, the copolymer further containing from about 85 percent by weight of styrene to about 93 percent by weight of styrene, and from about 7 percent by weight of butadiene to about 15 percent by weight of butadiene, (2) pigment particles, and (3) a charge enhancing additive.
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公开(公告)号：DE3175557D1
公开(公告)日：1986-12-11
申请号：DE3175557
申请日：1981-04-14
Applicant: XEROX CORP
Inventor： HOFFEND THOMAS R , NELSON ROBERT A
Abstract: Dispersion polymerization process for producing colored toner particles comprising admixing a colorant with a monomer to form an oil soluble organic phase, admixing a polymerization initiator with the organic phase, admixing the organic phase with an aqueous phase containing a suspending agent and an inorganic salt therein under polymerization conditions to form a suspension, polymerizing the suspension under continuous agitation to provide polymer particles containing the colorant and having a particle size in the range of from about 1 micron to about 100 microns, and recovering the polymer particles. The inorganic salt inhibits polymerization in the aqueous phase. Developer compositions and processes for developing electrostatic latent images are also disclosed.
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Patent Agency Ranking
公开(公告)号：BR8307138A
公开(公告)日：1984-08-07
申请号：BR8307138
申请日：1983-12-26
Applicant: XEROX CORP
Inventor： NELSON ROBERT A
Abstract: A positively charged electrostatographic toner composition comprising (1) a styrene butadiene coplymer plasticizer blend, containing from about 92 percent by weight to about 97 percent by weight of styrene butadiene copolymer, and from about 3 percent by weight to about 8 percent by weight of plasticizer, the styrene butadiene copolymer having a weight average molecular weight of from about 45,000 to about 155,000, and a molecular weight distribution of about 7, the copolymer further containing from about 85 percent by weight of styrene to about 93 percent by weight of styrene, and from about 7 percent by weight of butadiene to about 15 percent by weight of butadiene, (2) pigment particles, and (3) a charge enhancing additive.
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公开(公告)号：DE68924884D1
公开(公告)日：1996-01-04
申请号：DE68924884
申请日：1989-08-11
Applicant: XEROX CORP
Inventor： FULLER TIMOTHY J , NELSON ROBERT A , SMITH THOMAS W , MCGRANE KATHLEEN M , PREST WILLIAM M , AHUJA SURESH K
Abstract: A toner composition comprised of resin particles of a semicrystalline polyolefin or copolymers thereof with a melting point of from 50 DEG C to 100 DEG C, and pigment particles.
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公开(公告)号：CA1219761A
公开(公告)日：1987-03-31
申请号：CA438721
申请日：1983-10-11
Applicant: XEROX CORP
Inventor： NELSON ROBERT A
Abstract: This invention is directed to an improved positively charged toner composition comprised of (1) a styrene butadiene copolymer plasticizer blend, containing from about 92 percent by weight to about 97 percent by weight of styrene butadiene copolymer, and from about 3 percent by weight to about 8 percent by weight of plasticizer, the styrene butadiene copolymer having a weight average molecular weight of from about 45,000 to about 155,000, and a molecular weight distribution of about 7, the copolymer further containing from about 85 percent by weight of styrene to about 93 percent by weight of styrene, and from about 7 percent by weight of butadiene to about 15 percent by weight of butadiene, (2) pigment particles, and (3) a charge enhancing additive.
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公开(公告)号：CA1168498A
公开(公告)日：1984-06-05
申请号：CA385781
申请日：1981-09-14
Applicant: XEROX CORP
Inventor： NELSON ROBERT A , BAYLEY ROBERT D , HOFFEND THOMAS R , WILLIAMS MEURIG W
IPC: G03G9/08
Abstract: This invention relates to a process for preparing postively charged dry toner compositions by dispersion polymerization which comprises incorporating into the monomer phase during said dispersion polymerization certain triboelectric charge control materials, as represented by the following formula: X wherein R1, R2, R3, and R4 are independently selected from the group consisting of alkyl radicals of from 1 to about 7 carbon atoms, and x is an anion such as halide, nitrate, or sulfate.
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公开(公告)号：CA1159700A
公开(公告)日：1984-01-03
申请号：CA373905
申请日：1981-03-26
Applicant: XEROX CORP
Inventor： HOFFEND THOMAS R , NELSON ROBERT A
Abstract: Dispersion polymerization process for producing colored toner particles comprising admixing a colorant with a monomer to form an oil soluble organic phase, admixing a polymerization initiator with the organic phase, admixing the organic phase with an aqueous phase containing a suspending agent and an inorganic salt therein under polymerization conditions to form a suspension, polymerizing the suspension under continuous agitation to provide polymer particles containing the colorant and having a particle size in the range of from about 1 micron to about 100 microns, and recovering the polymer particles. The inorganic salt inhibits polymerization in the aqueous phase. Developer compositions and processes for developing electrostatic latent images are also disclosed.
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