Patents Assigned to Sumitomo Rubber Industry Co., Ltd.
  • Deproteinized natural rubber and process for producing the same
    Patent number: 6335407
    Abstract: A deproteinized natural rubber substantially free from any protein and a process for producing the same which comprises treating a latex with a protease and a specific surfactant or a combination of specific surfactants and separating rubber particles are disclosed. A method for elevating the green strength of a natural rubber and a method for lowering the green strength of a natural rubber are also disclosed. Furthermore, a means for preventing allergy induced by natural rubber is also disclosed.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: January 1, 2002
    Assignees: Kao Corporation, Sumitomo Rubber Industry Co., Ltd.
    Inventors: Yasuyuki Tanaka, Yuichi Hioki, Naoya Ichikawa