Patents Assigned to Korea Chemical Co., Ltd.
  • Patent number: 7172350
    Abstract: The present invention relates to a forming method using a thermal transfer printing sheet which is capable of implementing a three dimensional pattern. A method of forming a protruded surface using a thermal conduction difference of each portion of the pattern by a partial deposition thermal transfer printing sheet printed on a surface of a base material of a plastic substrate, or a gold or silver thin film partially printed by an engraving roller, and then the printed surface is heated to a certain temperature, so that the surface is divided into a heat blocked portion and a heat absorbed portion. In the forming method using a partial deposition thermal transfer printing sheet, or a gold or silver thermal transfer printing sheet, a thermal transfer printing sheet is dry-printed using only a heat and pressure, and a protruded surface is easily formed through a thermal diffusion process. It is possible to form various natural protruded surfaces.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: February 6, 2007
    Assignee: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Patent number: 6939589
    Abstract: Disclosed is a thermal transfer paper comprising a metal layer and capable of partially dissolving the metal layer, which comprises a dissolving function formed of at least one resin selected from the group consisting emulsion resins, water-soluble acryl resins, water-soluble polybutyral resins, alcohol-soluble polybutyral resins, water-soluble vinyl resins and alcohol-soluble vinyl resins, water or an alcohol solvent, and sodium hydroxide or an acid on the metal layer. The thermal transfer paper according to the present invention is provided with a dissolving function layer 30 able to dissolve a part of a metal layer 20, preferably an aluminum deposition layer 21 to form a dissolved part according to a desired design or pattern. Therefore, it is possible to produce unique color and texture, unlike a metal layer pattern formed by oxidation of a part on the metal layer.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: September 6, 2005
    Assignee: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Publication number: 20040137143
    Abstract: The present invention relates to a forming method using a thermal transfer printing sheet which is capable of implementing a 3D pattern through a method of forming a protruded surface using a thermal conduction difference of each portion in such a manner that a partial deposition thermal transfer printing sheet is printed on a surface of a base material of a plastic related thing, or a gold silver thin film is partially printed by a carving roller, and then the printed surface is heated to a certain temperature, so that the surface is divided into a heat blocked portion and a heat absorbed portion. In the forming method using a partial deposition thermal transfer printing sheet or a gold silver thermal transfer printing sheet according to the present invention, a thermal transfer printing sheet is dry=printed using only a heat and pressure, and a protruded surface is easily formed through a thermal diffusion process. It is possible to form various natural protruded surfaces.
    Type: Application
    Filed: August 5, 2003
    Publication date: July 15, 2004
    Applicant: KOREA CHEMICAL CO., LTD.
    Inventor: Sook Hee Chung
  • Patent number: 6756108
    Abstract: A heat transcription film comprising, a substrate film, a release agent layer formed on said substrate film, a color-ink printed layer formed on said release agent layer, a transparent-ink printed layer formed on said color-ink printed layer, a aluminum (Al) layer formed on said transparent-ink printed layer, and a partially bonded layer partially coated on said Al layer with a binder or adhesive in order to bind a predetermined object and partially show a color of said color-ink printed layer from the predetermined transcribed object.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: June 29, 2004
    Assignee: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Publication number: 20040105977
    Abstract: Disclosed is a thermal transfer paper comprising a metal layer and capable of partially dissolving the metal layer, which comprises a dissolving function formed of at least one resin selected from the group consisting emulsion resins, water-soluble acryl resins, water-soluble polybutyral resins, alcohol-soluble polybutyral resins, water-soluble vinyl resins and alcohol-soluble vinyl resins, water or an alcohol solvent, and sodium hydroxide or an acid on the metal layer. The thermal transfer paper according to the present invention is provided with a dissolving function layer 30 able to dissolve a part of a metal layer 20, preferably an aluminum deposition layer 21 to form a dissolved part according to a desired design or pattern. Therefore, it is possible to produce unique color and texture, unlike a metal layer pattern formed by oxidation of a part on the metal layer.
    Type: Application
    Filed: February 21, 2003
    Publication date: June 3, 2004
    Applicant: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Patent number: 6740354
    Abstract: A method for manufacturing a dissolution type thermal transfer film.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: May 25, 2004
    Assignee: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Publication number: 20030096088
    Abstract: In the present invention concerning a dissolution type thermal transfer film for the dimensional patterns and a method for manufacturing the same film, the simplification and speed of a pollution-free dry printing process and various types of decoration are achieved by transferring the thermal transfer film according to the invention to an article to be decorated made of wood or plastic molded material only with the use of heat and pressure and by subsequently forming a desired decoration in three-dimensional pattern through two dissolution processes, wherein the thermal transfer film comprises a base film consisting of polyester, polypropylene or polyvinylchloride without a mat agent or coated with a mat agent to provide a unglazed film, an optional releasing layer based on acrylic resin as the main component having separability to be mounted on the top of the base film, a print layer made of a water-soluble acryl-based resin, or water-soluble or alcoholic vinyl-based resin having dissolving power on the top
    Type: Application
    Filed: January 6, 2003
    Publication date: May 22, 2003
    Applicant: KOREA CHEMICAL CO., LTD.
    Inventor: Sook Hee Chung
  • Patent number: 6531208
    Abstract: In the present invention concerning a dissolution type thermal transfer film for three dimensional patterns and a method for manufacturing the same film, the simplification and speed of a pollution-free dry printing process and various types of decoration are achieved by transferring the thermal transfer film according to the invention to an article to be decorated made of wood or plastic molded material only with the use of heat and pressure and by subsequently forming a desired decoration in three-dimensional pattern through two dissolution processes, wherein the thermal transfer film comprises a base film consisting of polyester, polypropylene or polyvinylchloride without a mat agent or coated with a mat agent to provide a unglazed film, an optional releasing layer based on acrylic resin as the main component having separability to be mounted on the top of the base film, a print layer made of a water-soluble acryl-based resin, or water-soluble or alcoholic vinyl-based resin having dissolving power on the t
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: March 11, 2003
    Assignee: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Patent number: 6486239
    Abstract: This invention relates to a polyester based coating composition for anti-stain PCM outside panel and more particularly, to the polyester based coating composition for anti-stain PCM outside panel having the excellent combination of physical properties such as surface compactness, anti-contamination effect, acid resistance and self-cleaning effect, wherein the polyester based coating composition comprises: a) hydroxy unsaturated polyester resin and a melamine curing agent as main ingredients, b) sulfonic acid blocked with a secondary amine or epoxy resin, c) sulfonic acid blocked with a tertiary amine, d) an isocyanate compound blocked with malonate, e) a tin based curing catalyst, f) polyalkyl silicate, and g) an alkoxy compound; further, the polyester based coating composition for anti-stain PCM outside panel can demonstrate excellent properties of a film of paint such as appearance and workability even without the addition of any defoaming agent and leveling agent by adjusting the compatibility of both hyd
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: November 26, 2002
    Assignee: Kumgang Korea Chemical Co., Ltd.
    Inventors: Joon Ho Lee, Jin Hyung Lee, Sung Uk Park, Chang Il Jin, Joo Lak Sohn
  • Publication number: 20020150733
    Abstract: A heat transcription film comprising, a substrate film, a release agent layer formed on said substrate film, a color-ink printed layer formed on said release agent layer, a transparent-ink printed layer formed on said color-ink printed layer, a aluminum (Al) layer formed on said transparent-ink printed layer, and a partially bonded layer partially coated on said Al layer with a binder or adhesive in order to bind a predetermined object and partially show a color of said color-ink printed layer from the predetermined transcribed object.
    Type: Application
    Filed: November 7, 2001
    Publication date: October 17, 2002
    Applicant: KOREA CHEMICAL CO., LTD.
    Inventor: Sook Hee Chung
  • Publication number: 20020025411
    Abstract: In the present invention concerning a dissolution type thermal transfer film for three dimensional patterns and a method for manufacturing the same film, the simplification and speed of a pollution-free dry printing process and various types of decoration are achieved by transferring the thermal transfer film according to the invention to an article to be decorated made of wood or plastic molded material only with the use of heat and pressure and by subsequently forming a desired decoration in three-dimensional pattern through two dissolution processes, wherein the thermal transfer film comprises a base film consisting of polyester, polypropylene or polyvinylchloride without a mat agent or coated with a mat agent to provide a unglazed film, an optional releasing layer based on acrylic resin as the main component having separability to be mounted on the top of the base film, a print layer made of a water-soluble acryl-based resin, or water-soluble or alcoholic vinyl-based resin having dissolving power on the t
    Type: Application
    Filed: May 1, 2001
    Publication date: February 28, 2002
    Applicant: Korea Chemical Co., Ltd.
    Inventor: Sook Hee Chung
  • Patent number: 6331598
    Abstract: A process for preparing an emulsion polymer comprising placing a first mixture of monomers in a feed tank B which is connected directly to a reactor, placing a second mixture of monomers in a feed tank A which is connected to the feed tank B, and continuously varying the composition ratio of the monomers of feed tanks A and B in the emulsion polymer. The composition ratio is varied by varying the rate of feeding of the second mixture of monomers present in tank A into tank B while simultaneously varying the rate of feeding of the first mixture of monomers present in tank B into the reactor. The polymerization occurs as the first and second mixtures of monomers are simultaneously fluxed in the reactor while stirring.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: December 18, 2001
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Jong-Myung Park, Chang-Ho Choi, Jung-Kwon Oh, Seung-Min Hong
  • Patent number: 5712342
    Abstract: The present invention relates to a process for production of a water-dispersion of polyurethane resin by an organic acid-oxirane ring opening reaction and to an water-borne paint composition containing the resin made thereby, wherein said a water-dispersion of polyurethane resin is obtained by reacting polyisocyanate and the following polyols:a) A polyol grafted with a long chain alkyl group obtained by organic acid-oxirane ring opening reaction;b) Neutralized dimethyl alkyl acid of 0.1 to 100 milliequivalents and polyethylene glycol of 10 to 2,000 number average molecular weight as functional groups for water-dispersion of synthesized resin.c) Polyol having at least one or more hydroxyl groups on termini and a number average molecular weight of 10 to 2,000.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: January 27, 1998
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Yang Bae Kim, Jong Myung Park
  • Patent number: 5639805
    Abstract: The present invention relates to a process for preparing polymeric particles which is specially designed to be served as an opacifying agent in coating compositions such as water-borne paints, paper coating compositions and molding compositions which have white or light color shades. In more detailed description, this invention is concerned with the process for making an aqueous dispersion of core-shell emulsion polymer particles comprising (1) preparing the core by polymerizing carboxylic acid monomers with other monoethylenically unsaturated monomers, (2) encapsulating said core with a rigid polymer shell by polymerizing shell-forming monomers, in the presence of said core particles, which are fed in such manner that compositional contents of monomers entering to a polymerization zone is changing gradually thoughout the period of monomer feeding, and (3) neutralizing with base so as to swell said core and form particles which, when dried, contain at least one void.
    Type: Grant
    Filed: December 11, 1995
    Date of Patent: June 17, 1997
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Jong Myung Park, Sang No Han, Bok G. Won
  • Patent number: 5631308
    Abstract: An anti-fouling paint comprising a self-polishing copolymer which contains at least one side-chain bearing an organic half-ester at one terminal group exhibits an improved anti-fouling property, storage stability, and resists the cracking, peeling, and flaking problems which usually occur in paint film during long-term exposure. In particular, the use of such paint shows excellent adhesion properties on pre-coated, tin-based anti-fouling paint.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: May 20, 1997
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Jae H. Ryu, Moon Y. Lee, Bum S. Kim, Duk H. Kim
  • Patent number: 5476917
    Abstract: This invention is directed to a process for preparing grafted organic polyester of phosphoric acid, incorporated into water-borne coating compositions, reducing remarkably the tendency of aluminum flake pigments to react with the aqueous medium of the compositions, resulting in generation of hydrogen. This can be obtained by grafting the reaction product from the reaction of an orthophosphorus derivative with a compound which contains in the molecule an epoxide group and aromatic or alicyclic group, to a pre-polymer having isocyanate group as an end group and an ethyleneoxide group. The grafted organic polyester of phosphor acid has excellent dispersity with pigments and results in satisfactory adhesion with resin as a binder because it prevents pigments from contacting with water during water dispersing.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: December 19, 1995
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Sang-Hoon Kim, Jong-Myung Park, Ki-Ho Byun
  • Patent number: 5472993
    Abstract: An anti-fouling paint using self-polishing copolymer which contains n-[(N-isothiazolonyl)-alkyl] acrylate as one of the monomers has improved anti-fouling property and can reduce environmental hazard by reduction of the leaching amount of biocide like organotin and of additional biocide like copper compound. The paint can control the rate of dissolution and prolong the effectiveness of the paint.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: December 5, 1995
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Bum S. Kim, Chang K. Seo, Chang J. You
  • Patent number: 5262510
    Abstract: A process for preparing polyester resins comprises (1) reacting a mixture of organic carboxylic monomers having at least two reactive carboxyl groups with a mixture composed of at least two aliphatic alcohols having at least two hydroxyl groups to form a prepolymer, and (2) reacting the prepolymer with a mixture composed of pyromellitic dianhydride and adipic acid or azelaic acid to form polyester resins.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: November 16, 1993
    Assignee: Korea Chemical Co., Ltd.
    Inventors: O-Weon Kwon, Bong-jin Kim
  • Patent number: 5227435
    Abstract: A process for preparing polyester resins for powder coatings by using monomers having a low glass transition temperature and silicone compounds comprises (1) condensation reacting silicone compounds with alcohols having at least two hydroxyl groups, (2) reacting resins prepared by the step (1) with acidic compounds in the presence of esterification catalysts, and (3) reacting resins prepared by step (2) with trimellitic anhydride in the presence of catalysts to form polyester resins having an acid value of 30 to 100, a low melting viscosity, a low softening point, excellent storage stability, good heat-resistance and a good appearance.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: July 13, 1993
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Chung-gu Kang, Bong-jin Kim
  • Patent number: 5109067
    Abstract: A process for preparing a modified resin and an epoxy resin composition for use in semiconductor encapsulation which comprises providing a quantity of epoxy resins, synthetic rubber compounds, and hydroxy modified polysiloxanes, reacting the epoxy resins with the synthetic rubber compounds, and reacting the resultant product of the initial reaction with the hydroxy modified polysiloxanes, the epoxy resin composition comprising 0.1-10% by weight of the modified resin, epoxy resin, curing agent, catalyst, releasing agent, coupling agent, and fibers.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: April 28, 1992
    Assignee: Korea Chemical Co., Ltd.
    Inventors: Lee J. Dae, Yoo C. Joon, Kim B. Sung