Patents by Inventor Wei Liang Chien

Wei Liang Chien 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).

  • METHOD FOR PREPARING POLYURETHANE FOAMS
    Publication number: 20220098383
    Abstract: Described herein is a method for preparing polyurethane foams, including (1) placing a reaction mixture into a pressurizable chamber, and (2) polymerizing the reaction mixture at an additional pressure, where the reaction mixture comprises an isocyanate, an isocyanate-reactive compound and a blowing agent, and the reaction mixture is placed into the pressurizable chamber at a packing factor of 2.0-4.0. Also described herein is a polyurethane foam prepared by such a method.
    Type: Application
    Filed: January 28, 2020
    Publication date: March 31, 2022
    Inventors: Bang Wei Xi, YingHao Liu, Wei Liang Chien, Jin Lin Liu, Bo Chen
  • Polyurethanes with an Asker C-Hardness of Between 1 and 70
    Publication number: 20080214769
    Abstract: Process for preparing polyurethanes having an Asker C hardness of from 1 to 70 by reacting (a) isocyanates with (b) compounds which are reactive toward isocyanates, wherein (b1) monools which have a molecular weight in the range from 1500 g/mol to 6000 g/mol and are based on monoalcohols having from 2 to 6 carbon atoms which have been alkoxylated by means of ethylene oxide and/or propylene oxide are used as (b) compounds which are reactive toward isocyanates.
    Type: Application
    Filed: November 4, 2005
    Publication date: September 4, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Wolfgang Pohl, Stefan Quaiser, Gheun-Gwo Chen, Wei Liang Chien