Abstract: Errors in regard to toner materials which may or may not correspond to toner materials installed in a developer unit of a print engine are avoided by providing storage of data concerning the toner in the printer rather than the dedicated processor. A feedback link is thus developed which extends from the developer unit or print engine through the dedicated processor to the supporting processors. Confidence levels in the correspondence of the information and the installed toner are increased by use of a simple switch position associated with the location of a developer unit. The feedback arrangement for avoidance of printing errors is also fully compatible with a customer changeable developer feature while allowing the printer to be operated in accordance with operating parameters specific to a special purpose toner such as MICR or a color toner.

Abstract: A binder polymer composition for electrostatographic toners comprises a carboxysubstituted precursor polymer crosslinked by reaction with an N,N,N?N?-tetrakis(2-hydroxyalkyl) bisamide compound of the structure wherein R1 is a substituted or unsubstituted alkylene group containing 1 to about 10 carbon atoms and R2 is H or an alkyl group containing 1 to about 6 carbon atoms.

Abstract: Toner formulations and developers containing the toner formulations are described. The toner contains at least one toner resin, at least one first charge control agent capable of providing a consistent level of charge, at least one second charge control agent capable of providing a sustained level of charge, at least one surface treatment agent, and at least one release agent and optionally at least one colorant. The toners of the present invention preferably provide a consistent level of charge of from about −10 to about −30 micro C/gm and also provide this level of charge for a sustained period of time, such as from about 2 to about 10 minutes. The toners of the present invention also provides excellent ruboff values for an image printed from the toners of the present invention. Methods of improving ruboff are described as well as methods to develop an image using the toner of the present invention.

Abstract: A process for lowering the charge/mass (Q/m) ratio of toner particles formed by limited coalescence includes: forming an organic phase containing a water-immiscible liquid, pigment, a quaternary ammonium tetraphenylborate salt, and a polymeric material selected from the group consisting of an acrylic resin, a methacrylic resin, a styrene-acrylic resin, a styrene-methacrylic resin, a polyamide, and a polyester. The organic phase is dispersed in an aqueous phase containing a solid colloidal stabilizer, and a suspension of small droplets of the organic phase is formed in the aqueous phase by high shear agitation. The water-immiscible liquid is removed from the small droplets, thereby forming a suspension in the aqueous phase of small, non-spherically shaped solid particles, which are separated from the aqueous phase and dried. The quaternary ammonium tetraphenylborate salt is included in the organic phase in an amount effective for lowering the charge/mass (Q/m) ratio of the toner particles.

Abstract: A process for preparing polymeric toner particles comprises dissolving a binder polymer in an organic solvent to form an organic phase, which is dispersed in an aqueous phase comprising a promoter and a particulate stabilizer to form a first dispersion. This first dispersion is homogenized to form a limited coalescence dispersion, to which is added poly(adipic acid-co-N-methylaminethanol), resulting in formation of a mixture comprising toner particle droplets. The organic solvent is removed from the mixture, and the resulting non-spherical toner particles are collected.

Abstract: Toner formulations and developers containing the toner formulations are described. The toner contains at least one toner resin, at least one first charge control agent capable of providing a consistent level of charge, at least one second charge control agent capable of providing a sustained level of charge, at least one surface treatment agent, and at least one release agent and optionally at least one colorant. The toners of the present invention preferably provide a consistent level of charge of from about −10 to about −30 micro C/gm and also provide this level of charge for a sustained period of time, such as from about 2 to about 10 minutes. The toners of the present invention also provides excellent ruboff values for an image printed from the toners of the present invention. Methods of improving ruboff are described as well as methods to develop an image using the toner of the present invention.

Abstract: A binder polymer composition for electrostatographic toners comprises a carboxysubstituted precursor polymer crosslinked by reaction with an N,N,N′N′-tetrakis(2-hydroxyalkyl) bisamide compound of the structure 1

Abstract: A composition for electrostatographic toner particles includes an organic binder polymer and a dye having the structure wherein Z represents a thiazole moiety II

Abstract: In a computer controlled printing system including a dedicated processor for routing print jobs from supporting processors to printers or print engines thereof, errors in regard to toner materials which may or nay not correspond to toner materials installed in a developer unit of a print engine are avoided by providing storage of data concerning the toner in the printer rather than the dedicated processor. A feedback link is thus developed which extends from the developer unit or print engine through the dedicated processor to the supporting processors. Confidence levels in the correspondence of the information and the installed toner are increased by use of a simple switch positional associated with the location of a developer unit. The feedback arrangement for avoidance or printing errors is also fully compatible with a customer changeable developer feature while allowing the printer to be operated in accordance with operating parameters specific to a special purpose toner such as MICR or a color toner.

Abstract: A process for forming non-spherical toner particles by limited coalescence comprises: forming an organic phase comprising a polymeric material, a pigment, a quaternary ammonium tetraphenylborate salt, and a water-immiscible liquid; dispersing the organic phase in an aqueous phase containing a solid colloidal stabilizer; forming a suspension of small droplets of the organic phase in the aqueous phase by high shear agitation; removing the water-immiscible liquid from the small droplets, thereby forming a suspension of small solid particles in the aqueous phase; and separating and drying the solid particles, which are toner particles having a non-spherical shape.

Abstract: A process for forming non-spherical toner particles by limited coalescence comprises: forming an organic phase comprising a polymeric material, a pigment, a quaternary ammonium tetraphenylborate salt, a phosphonium salt polymer formed by condensation of at least one dicarboxylic acid or dicarboxylic ester monomer with at least one diol monomer, at least one of the acid or ester monomers including a triarylphosphonium salt group, and a water-immiscible liquid; dispersing the organic phase in an aqueous phase containing a solid colloidal stabilizer; forming a suspension of small droplets of the organic phase in the aqueous phase by high shear agitation; removing the water-immiscible liquid from the small droplets, thereby forming a suspension of small solid particles in the aqueous phase; and separating and drying the solid particles, which are toner particles having a non-spherical shape.

Abstract: The invention, in its broader aspects provides an electrophotographic toner having polymeric binder and 2,4-dicyanoglutarimide negative charge control agents represented by the following formula: wherein R1 and R2 are defined in the specification.

Abstract: A charge control agent is disclosed selected from the group consisting of 1,4-dihydropyridines having the following general structure: where R1, R2, R3, R4, R5, Xn, and Z are defined in the specification. These compounds are useful in electrostatographic toners and developers.

Abstract: The invention, in its broader aspects provides an electrophotographic toner having polymeric binder and 2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetamides as charge control agent. wherein n is 1 or 2; R and R1 are defined in the specification. The compounds are useful as charge-control agents in electrostatographic toners and developers.

Abstract: An electrophotographic toner is disclosed comprising a polymeric binder and an N-[2-(1,2-benzisothiazol-3(2H)-ylidene 1,1 -dioxide)-2-cyanoacetyl]benzenesulfonamide as charge control agent having the structure: ##STR1## wherein n and X are defined in the specification. The compounds are useful as charge control agents in electrostatographic toners and developers.

Abstract: The invention, in its broader aspects provides an electrophotographic toner having polymeric binder and 2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetamides as charge control agent. ##STR1## wherein n is 1 or 3; R and R.sup.1 are defined in the specification. The compounds are useful as charge-control agents in electrostatographic toners and developers.

Abstract: Polyurethanes with reactive 2-cyanoacetamido moieties are cross-linked with selected electrophiles to give polyurethanes with increased network density.

Abstract: A poly(vinylbenzyl quaternary phosphonium) salt having the following general structure: M represents Fe or Zn;X represents F, Cl, Br or I;p is 3 when M represents Zn and p is 4 when M represents Fe;ortho, meta and para isomers of the vinyl benzyl moiety are included;R.sup.1, R.sup.2 and R.sup.3 represent hydrogen; alkyl having from 1 to 24 carbon atoms; hydroxy-; carboxy-; alkoxy-; carboalkoxy; acyloxy-; amino-; nitro-; cyano-; keto-; or halo-; and R.sup.1, R.sup.2 and R.sup.3 may be independently substituted in the ortho, meta or para positions. R.sup.1, R.sup.2 and R.sup.3 may represent more than one substituent per ring;.brket open-st.Z.brket close-st.

Abstract: Electrostatographic toners and developers are disclosed. They contain poly [(2-cyanoacetamido)phenyl acrylate] charge control agents.

Abstract: In accordance with the present invention, an intermediate toner transfer member includes a substrate and an outer surface layer that includes a ceramer comprising a polyurethane silicate hybrid organic-inorganic network. The ceramer is formed by a crosslinking reaction between a polyurethane with reactive alkoxysilane terminal moieties and a tetraalkoxysilane. The silane-terminated polyurethane is the reaction product of one or more aliphatic polyols with terminal hydroxyl groups and an alkoxysilane-substituted alkyl isocyanate compound. Further in accordance with the present invention is a process for forming an intermediate toner transfer member having an outer surface layer comprising a polyurethane silicate hybrid organic-inorganic network.