Patents by Inventor Yeong-Show Yang

Yeong-Show Yang 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).

  • Resin for an oriented-reinforcement prepreg that can be shaped and molded products that are obtained
    Patent number: 6136883
    Abstract: A modified polyester-polyurethane resin is formed by reacting at least one polyisocyanate at least one polyol polyester that is prepared from at least one diacid or ethylenically unsaturated anhydride and at least one polyhydric alcohol, at least one ethylenically unsaturated monomer, at least one promoter of the decomposition of the catalyst peroxide, at least one catalyst of the isocyanate-alcohol reaction, and at least one hydroxylated (alk)acrylate and is used for the impregnation of oriented reinforcements. The resin makes possible quick molding, at moderate temperature, of parts with high mechanical properties.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: October 24, 2000
    Assignee: Cray Valley S.A.
    Inventors: Yeong-Show Yang, Francette Porato, Serge Lequeux
  • Process for production of a composite product
    Patent number: 5851667
    Abstract: The invention relates to a process for production of a composite product which involves molding several materials of different natures, including an oriented-reinforcement material that is preimpregnated with resin, without the resin being injected separately after the other materials in the mold are assembled,in which the resin is a modified polyester-polyurethane that is formed by reacting:a first component that comprises (A) at least one polyisocyanatewith a second component that comprises:(a) at least one polyol polyester,(b) at least one ethylenically unsaturated monomer.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: December 22, 1998
    Assignee: Cray Valley S.A.
    Inventors: Yeong-Show Yang, Francette Porato, Serge Lequeux
  • Resins and compositions for the manufacture of heat-resistant high modulus materials, and molded articles obtained from such materials
    Patent number: 5554687
    Abstract: Composite material produced from a first polyisocyanate-based mixture, from a second mixture comprising at least one ethylenically unsaturated monomer, at least one polyoxyalkylene polyamine and one ethylenically unsaturated polymer, and from a cross-linking catalyst. The first mixture comprises at least one polyisocyanate and at least one catalyst for reacting isocyanate functions with the ethylenically unsaturated polymer of the second mixture, and the second mixture comprises, for 100 parts by weight: 25 to 50 parts by weight of at least one ethylenically unsaturated monomer, 50 to 75 parts by weight of an unsaturated amine polyester resin which is the product of the reaction between (a) an unsaturated polyol polyester prepolymer and (b) a polyoxyalkylene amine, the weight ratio (a)/(b) being at least equal to 0.8, and as much as 4 parts by weight of at least one cross-linking catalyst. Application in the production of high modulus heat-resistant moulded articles.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: September 10, 1996
    Assignee: Cray Valley S.A.
    Inventor: Yeong-Show Yang