Patents by Inventor Cheun-Gwo Chen

Cheun-Gwo Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyurethane sealant
    Patent number: 10280248
    Abstract: The present invention relates to a process for producing a polyurethane sealant, which comprises mixing (a) polyisocyanate, (b) polyetherpolyols, (c) aliphatic, exclusively amine initiated alkoxylation products having an OH-number of 400 to 1000 mg KOH/g and a functionality of 4, (d) blowing agents and optionally (e) chain extenders and/or crosslinking agents, (f) catalysts and (g) auxiliaries and/or additives to give a reaction mixture and reacting the reaction mixture to give the polyurethane sealant. The present invention further relates to a cast in place polyurethane sealant, obtained according to a process according to the present invention.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: May 7, 2019
    Assignee: BASF SE
    Inventors: Yue Xia Feng, Cheun Gwo Chen, Andreas Emge, Jia Liang Di
  • Method for producing an artificial leather with improved flexing endurance properties
    Patent number: 10093040
    Abstract: The present invention relates to a process for production of artificial leather comprising top coat, polyurethane layer and optional substrate layer, said process comprising i) providing a release layer, ii) applying one or more than one layer of a top coat to the release layer to an overall top coat layer thickness in the range from 1 to 500 ?m, iii) applying first polyurethane system components comprising an isocyanate component (A) and a polyol component (B) to the top coat to form a first polyurethane layer, wherein the isocyanate index of the first polyurethane system components is in the range from 101 to 140, iv) optionally applying further polyurethane system components to the first polyurethane layer to form further polyurethane layers, v) optionally applying a substrate layer to the polyurethane system components, vi) curing the polyurethane system components to form a polyurethane layer, and vii) separating the release layer from the top coat, wherein the overall thickness of the first and optional
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: October 9, 2018
    Assignee: BASF SE
    Inventors: Franz Xaver Redl, Andreas Emge, YueXia Feng, Cheun-Gwo Chen, Xiao-Kun Yang, Oliver Reese
  • POLYURETHANE SEALANT
    Publication number: 20160280837
    Abstract: The present invention relates to a process for producing a polyurethane sealant, which comprises mixing (a) polyisocyanate, (b) polyetherpolyols, (c) aliphatic, exclusively amine initiated alkoxylation products having an OH-number of 400 to 1000 mg KOH/g and a functionality of 4, (d) blowing agents and optionally (e) chain extenders and/or crosslinking agents, (f) catalysts and (g) auxiliaries and/or additives to give a reaction mixture and reacting the reaction mixture to give the polyurethane sealant. The present invention further relates to a cast in place polyurethane sealant, obtained according to a process according to the present invention.
    Type: Application
    Filed: November 7, 2014
    Publication date: September 29, 2016
    Applicant: BASF SE
    Inventors: YueXia FENG, Cheun Gwo CHEN, Andreas EMGE, Jia Liang DI
  • ARTIFICIAL LEATHER WITH IMPROVED FLEXING ENDURANCE PROPERTIES
    Publication number: 20140215850
    Abstract: The present invention relates to a process for production of artificial leather comprising top coat, polyurethane layer and optional substrate layer, said process comprising i) providing a release layer, ii) applying one or more than one layer of a top coat to the release layer to an overall top coat layer thickness in the range from 1 to 500 ?m, iii) applying first polyurethane system components comprising an isocyanate component (A) and a polyol component (B) to the top coat to form a first polyurethane layer, wherein the isocyanate index of the first polyurethane system components is in the range from 101 to 140, iv) optionally applying further polyurethane system components to the first polyurethane layer to form further polyurethane layers, v) optionally applying a substrate layer to the polyurethane system components, vi) curing the polyurethane system components to form a polyurethane layer, and vii) separating the release layer from the top coat, wherein the overall thickness of the first and optional
    Type: Application
    Filed: September 10, 2012
    Publication date: August 7, 2014
    Applicant: BASF SE
    Inventors: Franz Xaver Redl, Andreas Emge, YueXia Feng, Cheun-Gwo Chen, Xiao-Kun Yang, Oliver Reese
  • Method for Producing Polyurethane Layers and Use Thereof as Imitation Leather
    Publication number: 20080214727
    Abstract: The invention concerns a process, preferably a solventless process, for producing a polyurethane layer and its use as artificial leather.
    Type: Application
    Filed: March 16, 2006
    Publication date: September 4, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Wolfgang Pohl, Cord Schmalkuche, Holger Leifheit, Stefan Quaiser, Cheun-Gwo Chen, Wei Liang