Patent application number | Description | Published |
20090233206 | Toner having excellent image uniformity - There is provided a toner having narrow charge distribution, high chargeability and low image contamination, as well as excellent physical properties such as long-term stability, transfer property and image uniformity, by improving shapes of toner core particles and adding a suitable external additive to surfaces of the toner core particles. The toner includes spheroidized toner core particles; and an external additive coated onto surfaces of the toner core particles, wherein the external additive comprises organic powder, silica and spherical titanium dioxide powder. The toner may be useful to obtain a highly uniform and high-quality image even when the toner of the present invention is used for an extended time since the toner has high chargeability, excellent image uniformity in which charge uniformity and narrow charge distribution are maintained for a long time, low image contamination, as well as excellent physical properties such as transfer property and long-term stability. | 09-17-2009 |
20090246673 | Method for Manufacturing a Toner Having Good Charging Characteristics - There is provided a toner having good charging characteristics that is composed of a core region and a thin shell in which a charge control agent is densely distributed so as to improve charging characteristics of the toner, and a method for manufacturing the same. The method for manufacturing a toner having a bi-layered structure includes: producing a toner core using a suspension polymerization method; preparing a suspension of toner particles having a core-shell structure by forming a rigid shell on a surface of the toner core; and recovering the toner particles from the suspension as a post-processing operation. | 10-01-2009 |
20090311618 | Surface-modified non-magnetic mono-component color toner with improvements in background contamination and transfer efficiency and method of preparing the same - Provided is a non-magnetic mono-component color toner with improved charge properties by surface modification with a charge control agent. The color toner is prepared by spheroidizing toner core particles including a binder and a colorant in the presence of 0.5 to 3 parts by weight of a charge control agent and coating the resultant spherical toner core particles with a first spherical organic powder with an average particle size of 50 to 120 nm, a second spherical organic powder with an average particle size of 600 to 1,000 nm, silica with an average particle size of 5 to 20 nm, and titanium dioxide with an average particle size of 300 to 1,000 nm. The color toner exhibits excellent surface charge properties (e.g., a narrow charge distribution, high chargeability, and good charge maintenance capability), thereby ensuring low image/background contamination, high transfer efficiency, good image density and long-term stability. | 12-17-2009 |
20100047708 | METHOD OF PRODUCING POLYMERIZED TONER - A method for producing a toner is provided. The method comprises the steps of (1) dispersing a water-soluble polyvinyl alcohol having a degree of polymerization of 1,500 to 2,500 and a degree of saponification of 75 to 98% in an aqueous medium to prepare an aqueous dispersion of the polyvinyl alcohol, (2) preparing a mixture of monomers, (3) mixing the aqueous dispersion with the monomer mixture, and (4) polymerizing the monomers. | 02-25-2010 |
20100104968 | Polymerized toner having high resolution - A polymerized toner is provided. The polymerized toner comprises a reactive anionic surfactant having at least one reactive functional group. The reactive anionic surfactant is added simultaneously with a dispersant to prepare an aqueous dispersion or is added within 2 hour after a polymerization reaction of a monomer mixture is initiated in an aqueous dispersion. This simultaneous or rapid addition allows the reactive anionic surfactant to be dispersed on the surface of the toner particles. The reactive anionic surfactant is located over the entire surface of the toner particles to increase the surface charge density of the toner, achieving good charge stability and excellent imaging characteristics. | 04-29-2010 |
20100112472 | POLYMERIZED TONER AND METHOD OF PRODUCING THE SAME - A polymerized toner is provided. The polymerized toner has cores containing polyvinylidene fluoride particles. The polyvinylidene fluoride particles have an average particle diameter of 1.1 to 1.5 μm and a melting temperature (T | 05-06-2010 |
20100112479 | Photopolymerization initiator containing unsaturated double bond and oxime ester group and photosensitive resin composition comprising the same - A photopolymerization initiator is provided. The photopolymerization initiator contains at least one unsaturated double bond and at least one oxime ester group in the molecule. The photopolymerization initiator comprises a compound represented by Formula 1 or 2: | 05-06-2010 |
20100129749 | POLYMERIZED TONER AND METHOD OF PRODUCING THE SAME - A polymerized toner is provided. The polymerized toner has cores containing a wax with a polydispersity of 1.05 to 1.1. The fixability of the polymerized toner is improved by the presence of the wax. Further provided is a method of producing the polymerized toner. | 05-27-2010 |
20100151373 | Toner Particle Having Excellent Charging Characteristics,Long term Credibility and Transferring Property, Method for Producing the Same and Toner Containing Said Toner Particle - The invention relates to toner particles having excellent charging characteristics and transferring properties, a method for producing the same and toner including the same. More particularly, the invention relates to toner particles, a method for producing the same and toner including the same, in which a CCA highly compatible with a binder resin is readily dispersed in the binder resin, thereby improving charge-maintaining property and charge distribution, and the resultant mixture is sphered to realize excellent long term credibility and transfer property. The toner particles include a styrene/acrylate-based CCA; a styrene/acrylate-based binder resin; and a polyester-based binder resin. | 06-17-2010 |
20100160477 | Composition for simultaneously forming two isolated column spacer patterns - A composition for forming column spacers is provided. The composition comprises a radical polymerization inhibitor. The use of the composition enables simultaneous formation of a saturated pattern and a semi-transmissive pattern as column spacer patterns having different shapes, whose difference in thickness is controllable as desired although the sensitivity is slightly reduced, through a slit or semi-transmissive mask by varying the kind and amount of the radical polymerization inhibitor. Further provided are column spacers formed using composition and a liquid crystal display using the column spacers. | 06-24-2010 |
20100190103 | METHOD OF PRODUCING POLYMERIZED TONER - Disclosed is a method for producing a polymerized toner. In the method, a mixture of colloidal silica as an aqueous dispersant and a polyvinylpyrrolidone is used during suspension polymerization. The amount of polyvinylpyrrolidone/colloidal silica aggregates having a diameter smaller than 100 nm is also limited to 1% by weight or less, based on the total weight of all aggregates. A polymerized toner produced by the method has a volume average particle diameter (dv) of 5 to 10 μm and a volume average particle diameter/number average particle diameter ratio (dv/dp) of 1.5 or less. The polymerized toner is consumed in a small amount during printing. According to the method, the formation of emulsion particles having a size smaller than 0.5 μm is inhibited. | 07-29-2010 |
20100245732 | COLOR FILTER SUBSTRATE - A color filter substrate is provided. In the color filter substrate, transparent protective films are formed on respective sub-pixels of a color filter. The color filter substrate has improved electric field characteristics without the need for additional optical or circuit compensation to achieve an improvement in contrast and a reduction in color difference. | 09-30-2010 |
20100261815 | PHOTOACTIVE COMPOUND AND PHOTOSENSITIVE RESIN COMPOSITION COMPRISING THE SAME - A novel photoactive compound is provided. The photoactive compound has a structure represented by Formula 1: | 10-14-2010 |
20110020742 | PROCESS FOR PREPARING POLYMERIZED TONER - A process for preparing toner and a polymerized toner prepared thereby are provided. The process for preparing toner comprises: forming an aqueous dispersion medium comprising calcium phosphate; forming a monomer mixture of a polymer charge control agent having weight average molecular weight of about 10,000 to 20,000, pigment, and a monomer for a binder resin; dispersing the monomer mixture in the aqueous dispersion in the form of droplets; and suspension-polymerizing the monomer mixture dispersed in the form of droplets, wherein about 2 to 6 parts by weight of the calcium phosphate and about 0.6 to 10 parts by weight of the charge control agent are used, on the basis of 100 parts by weight of the monomer mixture. | 01-27-2011 |
20110269867 | ALKALI-SOLUBLE POLYMER COMPOUND AND PHOTOSENSITIVE RESIN COMPOSITION USING THE SAME - A novel alkali-soluble polymer compound including a dehydrogenated pimaric acid and/or its isomer as a repeating unit, and a photosensitive resin composition including the alkali-soluble polymer compound as an effective binder matrix are provided. A photosensitive resin composition using the alkali-soluble polymer compound including a dehydrogenated resin acid has excellent photosensitivity and developing characteristics cause a less deformation in a firing process, has excellent elasticity. Thus, the photosensitive resin composition is advantageous for curing various transparent photosensitive materials, in particular, materials of column spacers, an overcoat, a passivation layer, or the like, used for fabricating color filters of an LCD. | 11-03-2011 |
20110287366 | PHOTORESIST COMPOSITION COMPRISING PHOTOINITIATORS, AND TRANSPARENT THIN FILM AND LIQUID CRYSTAL DISPLAY DEVICE USING THE COMPOSITION - A photoresist composition is provided. The photoresist composition comprises two or more kinds of photoinitiators having different activation wavelengths whose difference is at least 20 nm. The photoresist composition has high sensitivity and forms a pattern whose thickness is easy to control depending on the exposure intensity through a slit or transflective mask. Further provided are a transparent thin film formed using the photoresist composition and a liquid crystal display device comprising the thin film. | 11-24-2011 |
20110318692 | PHOTOACTIVE COMPOUND AND PHOTOSENSITIVE RESIN COMPOSITION CONTAINING THE SAME - The present invention relates to a photoactive compound of a novel structure represented by Chemical Formula 1 below | 12-29-2011 |
20120004341 | ALKALI SOLUBLE RESIN POLYMER AND NEGATIVE-TYPE PHOTOSENSITIVE RESIN COMPOSITION INCLUDING THE SAME - Provided are an alkali soluble binder resin that includes a monomer including an unsaturated double bond, an unsaturated double bond character monomer including a carboxylic acid and an unsaturated double bond character monomer including an allyl group as a repeating unit, in which a molecular weight distribution (Mw/Mn) is in a range of about 2.0 to about 3.5, and a negative-type photosensitive resin composition including the alkali soluble binder resin. Re-solubility, fine-patterned substrate adhesion and dispersion stability may be improved by including the alkali soluble binder resin according to the present invention. | 01-05-2012 |
20120100476 | PRESSURE FIXING TONER AND PREPARATION METHOD THEREOF - The present invention relates to a pressure fixing toner which can be fixed at a lower temperature to enable energy-efficient high-speed printing, and a preparation method thereof. | 04-26-2012 |
20120107736 | PROCESS FOR PREPARING POLYMERIZED TONER - The present invention relates to a process for preparing a polymerized toner, and in particular to a process for preparing a polymerized toner and a polymerized toner prepared therefrom, wherein a certain block copolymer and copper phthalocyanine are used within a predetermined range of the amounts for a carbon black dispersant during a suspension polymerization, thereby making it possible to realize a narrow particle sizes distribution, high transcription efficiency, and an enhanced image concentration. | 05-03-2012 |
20120276480 | METHOD OF PREPARING POLYMERIZED TONER - This present invention relates to a method of preparing a polymerized toner, which comprises the steps of: preparing an aqueous dispersion medium containing calcium phosphate; preparing a monomer mixture including a styrene-based pigment stabilizer having a weight average molecular weight of 2,000 to 200,000, a charge control agent, a pigment, and a monomer for binder resin; dispersing the monomer mixture in the form of droplets in the aqueous dispersion medium; and performing suspension polymerization for the monomer mixture dispersed in the form of droplets, and calcium phosphate is used in an amount of 2 to 6 parts by weight based on 100 parts by weight of the monomer mixture. Also, a polymerized toner produced using this method is provided. | 11-01-2012 |
20130029261 | POLYMERIZED TONER AND PREPARATION METHOD OF THE SAME - The present invention relates to a polymerized toner prepared by suspension polymerization. In particular, the polymerized toner comprises a plurality of toner particles that each comprising a binder resin, a pigment, a pigment stabilizer, a charge control agent, and a wax. The polymerized toner maintains a ratio of toner particles containing at least two wax domains per particle within a defined range. Thereby, the polymerized toner achieves high glossiness and good transfer efficiency. | 01-31-2013 |
20130052579 | POLYMERIZED TONER AND METHOD FOR MANUFACTURING SAME - The present invention relates to a polymerized toner including a low molecular weight polymer having a weight average molecular weight of 3000 to 30,000 and a method for preparing the same, wherein the polymerized toner can realize excellent gloss and offset feature and can also can exhibit excellent performance in the applications of high speed copying, development of transferred photos, etc. | 02-28-2013 |
20130059245 | POLYMERIZED TONER AND PREPARATION METHOD OF THE SAME - The present invention relates to a polymerized toner and a method for preparing the same, wherein the toner can realize an excellent offset feature, high transfer efficiency, and a uniform image and thus can exhibit excellent performances in the applications of high speed copying, development of transferred photos, etc. | 03-07-2013 |
20140370433 | POLYMERIZED TONER AND A METHOD FOR PREPARING THE SAME - This disclosure relates to a polymerized toner prepared by suspension polymerization. Particularly, this disclosure relates to a polymerized toner that comprises a binder resin, and a pigment, a charge control agent, and wax, which are dispersed in the binder resin, and maintains peak molecular weight (Mn) of the binder resin, the ratio of number average molecular weight/peak molecular weight (Mn/Mp), and gel content (Gel %), and thereby, can realize high glossiness and excellent off set property when printing, and a method for preparing the same. | 12-18-2014 |
20140377698 | POLYMERIZED TONER AND A METHOD FOR PREPARING THE SAME - This disclosure relates to a polymerized toner prepared by suspension polymerization. Particularly, this disclosure relates to a polymerized toner that further comprises a specific functional macro monomer, a polymer thereof, or a mixture thereof, in addition to a binder resin, and a pigment, a pigment stabilizer, a charge control agent and wax, which are dispersed in the binder resin, and thus can be fixed at low temperature in a development process, and exhibit high glossiness and excellent transfer efficiency. | 12-25-2014 |