Patents by Inventor Nai Wen Lin

Nai Wen Lin 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 elastomers having improved hydrolysis resistance
    Patent number: 6486224
    Abstract: The disclosed invention relates to a polyurethane elastomer that has improved hydrolysis resistance. The polyurethane elastomer is made by reacting a polyol blend of an aromatic dicarboxylic acid based polyester polyol, an aliphatic dicarboxylic acid based polyester polyol, and a blowing agent. The polyol blend is reacted with an isocyanate terminated prepolymer. The aromatic dicarboxylic acid based polyester polyol is the reaction product of an aliphatic alcohol and ortho-phthalic acid. The aliphatic dicarboxylic acid based polyester polyol is the reaction product of adipic acid and glycols.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: November 26, 2002
    Assignee: Huntsman International LLC
    Inventors: Nai Wen Lin, Ravi R. Joshi
  • Polyurethane elastomers having improved hydrolysis resistance
    Publication number: 20020040071
    Abstract: The disclosed invention relates to a polyurethane elastomer that has improved hydrolysis resistance. The polyurethane elastomer is made by reacting a polyol blend of an aromatic dicarboxylic acid based polyester polyol, an aliphatic dicarboxylic acid based polyester polyol, and a blowing agent. The polyol blend is reacted with an isocyanate terminated prepolymer. The aromatic dicarboxylic acid based polyester polyol is the reaction product of an aliphatic alcohol and ortho-phthalic acid. The aliphatic dicarboxylic acid based polyester polyol is the reaction product of adipic acid and glycols.
    Type: Application
    Filed: August 23, 2001
    Publication date: April 4, 2002
    Inventors: Nai Wen Lin, Ravi R. Joshi
  • Polyurethane foam composition having improved flex fatigue
    Patent number: 6031010
    Abstract: The present invention relates to a process for preparing a flexible polyurethane foam from the reaction of a polyisocyanate composition prepared from the reaction of an excess of organic polyisocyanate and a polyether polyol having a high ethylene oxide content and an isocyanate reactive composition comprising a chain extending agent and a combination of a polyether polyol having a high ethylene oxide content and a random copolymer having a high ethylene oxide content, and the product prepared therefrom.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: February 29, 2000
    Assignee: Imperial Chemical Industries PLC
    Inventor: Nai Wen Lin
  • Isocyanate-reactive compositions containing internal mold release agents
    Patent number: 5710231
    Abstract: An isocyanate-reactive composition is provided which comprises:(a) at least one compound having a plurality of isocyanate-reactive groups; and(b) a fatty polyamine having the formula:R.sup.1 --(NH--R.sup.2).sub.x --NH.sub.2wherein R.sup.1 is an alkyl group containing 8 to 40 carbon atoms, R.sup.2 is a divalent linking group containing 1 to 8 carbon atoms and x has a value of 1 to 4. Methods for preparing flexible foam articles utilizing the isocyanate-reactive compositions are also provided.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: January 20, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: Brian Fogg, Herbert Russell Gillis, Nai Wen Lin