Patents Assigned to Doobon Inc.
  • Patent number: 10385190
    Abstract: A zinc-deposited hydrotalcite for a PVC stabilizer includes: a hydrotalcite having a structure represented by the formula of Mg4Al2(OH)12CO3.3H2O; and zinc deposited onto the hydrotacite crystals by using any one method of electrode-position, chloride ion deposition, and plasma deposition.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: August 20, 2019
    Assignee: DOOBON INC.
    Inventor: Dae Hee Lee
  • Patent number: 9315649
    Abstract: The present invention relates to an additive composition including a counteragent, and more particularly, to an additive composition for preparation of polyolefins, which improve flowability of a nucleating agent and exhibits excellent transparency, by applying a counteragent of a specific structure to a sorbitol nucleating agent which is an additive used in preparation of polyolefins.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: April 19, 2016
    Assignees: DOOBON INC.
    Inventors: Dae Hee Lee, Hyun-Duk Cho, Young-Guk Kim, Xiao-Xia Wang
  • Patent number: 9221961
    Abstract: Provided herein is a flame-retardant polyolefin resin containing a blend which comprises 1-80 wt % of piperazine metal salts or polymers thereof, 10-80.0 wt % of nitrogen-containing synergists or phosphorus/nitrogen retardants, and 1-50 wt % of inorganic compounds, wherein the sum of the components of the blend is 100 wt %.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: December 29, 2015
    Assignees: DOOBON INC., LOTTE CHEMICAL CORPORATION
    Inventors: Dae Hee Lee, Seong Wook Lee, Sang-Bum Kim, Chang-Gyou Kim, Seung-Dae Ahn, Jong-In Ahn
  • Publication number: 20150045492
    Abstract: The present invention relates to an additive composition including a counteragent, and more particularly, to an additive composition for preparation of polyolefins, which improve flowability of a nucleating agent and exhibits excellent transparency, by applying a counteragent of a specific structure to a sorbitol nucleating agent which is an additive used in preparation of polyolefins.
    Type: Application
    Filed: October 30, 2013
    Publication date: February 12, 2015
    Applicants: DOOBON INC.
    Inventors: Dae Hee LEE, Hyun-Duk CHO, Young-Guk KIM, Xiao-Xia WANG
  • Patent number: 8318129
    Abstract: This invention relates to a partially dehydrated hydrotalcite obtained by heat-treating a hydrotalcite under a specific condition so that its weight is reduced by 1.5 to 5%, which is capable of imparting improved thermoresistance to a synthetic resin.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: November 27, 2012
    Assignees: DOOBON Inc.
    Inventors: Sung Wook Lee, DongHo Hyun
  • Publication number: 20100331470
    Abstract: This invention relates to a partially dehydrated hydrotalcite obtained by heat-treating a hydrotalcite under a specific condition so that its weight is reduced by 1.5 to 5%, which is capable of imparting improved thermoresistance to a synthetic resin.
    Type: Application
    Filed: February 12, 2009
    Publication date: December 30, 2010
    Applicants: DOOBON INC.
    Inventors: Sung Wook Lee, DongHo Hyun
  • Publication number: 20100187473
    Abstract: An oxide-like hydrotalcite having a certain structure and uniform size can be prepared by a method comprising milling and heat or microwave post-treatment, and it is capable of providing synthetic resins with high heat- and chlorine-resistance.
    Type: Application
    Filed: December 7, 2007
    Publication date: July 29, 2010
    Applicant: DOOBON INC.
    Inventors: DongHo Hyun, Sung Wook Lee, Young-Guk Kim
  • Patent number: 6692828
    Abstract: Disclosed is a spandex fiber prepared to be excellent in resistance to both chlorine and heat without affecting the properties of the polyurethane polymer, and manufacturing method thereof. The spandex fiber contains hydrotalcite coated with 0.1 to 10 wt. % of a melamine-based compound. The melamine-based compound includes melamine compounds, phosphor-associated melamine compounds, melamine cyanurate compounds, melamine compounds substituted with an organic compound having a carboxyl group, phosphor-associated melamine compounds substituted with an organic compound having a carboxyl group, or melamine cyanurate compounds substituted with an organic compound having a carboxyl group, which are used alone or in combination. The spandex fiber has a high resistance to both chlorine and heat and is therefore useful for underwear, socks, and particularly, sports apparels such as swimsuit.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: February 17, 2004
    Assignees: Hyosung Corporation, Doobon Inc.
    Inventors: Byung Su Song, Tae Woo Lee, Ji Won Kim, Seung Won Seo, Dae Hwi Lee