Class / Patent application number | Description | Number of patent applications / Date published |
523164000 | Lead pencil or marking crayon composition or process of preparing | 7 |
20090209678 | CRAYON - The invention provides a crayon having excellent feel when writing while having high gel hardness. The crayon comprises a colorant, a gelling agent, an organic solvent and a resin component, wherein the gelling agent is at least one selected from the group consisting of dibenzylidene sorbitol, tribenzylidene sorbitol and derivatives thereof, and the resin component comprises a combination of polyvinyl butyral resin having an average degree of polymerization of less than 350 and polyvinyl butyral resin having an average degree of polymerization of 350 or more. | 08-20-2009 |
20090247668 | PROCESS FOR PRODUCTION OF BLACK CRAYON - The invention provides a process for producing a crayon without poor gelation using a benzylidene sorbitol gelling agent together with the use of carbon black as a black pigment. The process comprises dissolving and dispersing carbon black and a resin component in an organic solvent, dissolving at least one gelling agent selected from the group consisting of dibenzylidene sorbitol, tribenzylidene sorbitol and derivatives thereof in the resultant under heating, pouring the obtained raw material solution into a molding container, and then cooling and solidifying the solution, wherein carbon black having an average particle diameter of primary particles of 20 to 100 nm is used as the carbon black. | 10-01-2009 |
20090326096 | CRAYON AND PROCESS FOR PRODUCING THE SAME - The invention provides a process for producing a crayon having a desired hardness stably without poor gelation using a benzylidene sorbitol gelling agent together with the use of carbon black as a black pigment. The process comprises: | 12-31-2009 |
20100016471 | CRAYON AND PROCESS FOR PRODUCING THE SAME - The invention provides a process for producing a crayon having a desired hardness stably without poor gelation using a benzylidene sorbitol gelling agent together with the use of carbon black as a black pigment. The process comprises: | 01-21-2010 |
20100273914 | CRAYON - The invention provides a crayon which comprises an alternative plasticizer in place of the conventional phthalate ester plasticizers and yet provides writings excellent in water resistance, the crayon comprising a colorant, a gelling agent, an organic solvent, a resin component, and a plasticizer, wherein the plasticizer is at least one selected from diisononyl adipate, acetyltributyl citrate, 1,2-cyclohexanedicarboxylic acid diisononyl, and alkylsulfonic acid phenyl ester and is contained in an amount of 1 to 20% by weight based on the crayon. | 10-28-2010 |
20110118383 | PENCIL LEAD FOR WRITING, DRAWING AND/OR PAINTING DEVICES - The invention relates to a polymer-bonded pencil lead for writing, drawing or painting devices, in particular for lead pencils or colored pencils, comprising a polymer binder, at least one wax and at least one filler, wherein the pencil lead further comprises 0.1 to 5 wt.-% palm oil. | 05-19-2011 |
20130338257 | COLOURIZED PEN WITH HIGH ELASTICITY AND PLASTICITY AND MANUFACTURING PROCESS THEREOF - A colorized pen with high elasticity and plasticity is composed of 20-40 wt % of a high molecular polymer as a main part, 20-38 wt % of a white or colorless solid powder as a part for the color carrier, 2-20 wt % of a pigment as a coloration part, and 2-20 wt % of a suitable regulator as an auxiliary part. A process for manufacturing a colorized pen with high elasticity and plasticity comprises the following steps: mixing raw materials uniformly, then extrusion molding the same at 120° C.-250° C., cooling, curing and then cutting the same. The pen of the present invention has high elasticity and plasticity, is environmentally friendly and safe, and possesses a clear color during writing; its manufacturing process is simple and environmentally friendly, and it has a wide applicability and reliable safety. | 12-19-2013 |