Patents by Inventor Hironori Aizawa

Hironori Aizawa 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 toner and toner containing same
    Patent number: 5066727
    Abstract: A toner resin contains a specific polymer as its principal component. The polymer is obtained by mixing 20-80 parts by weight of a low molecular polymer having a number average molecular weight of 1,000-5,000 and a glass transition temperature (Tg) of 40.degree.-75.degree. C., 80-20 parts by weight of a vinyl monomer, 0.01-5 parts by weight of a polymerization initiator and 0-3 parts by weight of a crosslinking agent, dispersing the resultant mixture in an aqueous system and then polymerizing same. The toner resin has excellent low-temperature fixing property and offsetting resistance, can provide marks of superb vividness, and also can prevent modifications of copied marks, for example, due to transfer of a plasticizer.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: November 19, 1991
    Assignee: Mitsui Toatsu Chemicals Incorporated
    Inventors: Hironori Aizawa, Masaaki Shin, Atsuo Okubo