Patents by Inventor Irina I. Zhuravleva

Irina I. Zhuravleva 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).

  • Process for producing phenol-formaldehyde oligomers of ortho-specific structure
    Patent number: 4146739
    Abstract: The process for producing phenol-formaldehyde oligomers of ortho-specific structure comprises reacting finely-divided crystalline phenol or a mixture of crystalline phenol with crystalline naphthalene, containing from 14 to 58 wt.% of the latter, at a temperature of from 20.degree. to 40.degree. C. with gaseous formaldehyde to give phenolic alcohols. The thus-prepared phenolic alcohols are subjected to polycondensation simultaneously with drying and subsequent heat-treatment of the resulting oligomers of ortho-specific structure.The process according to the present invention makes it possible to intensify the production of phenol-formaldehyde oligomers of ortho-specific structure. Furthermore, owing to the fact that this process makes it possible to eliminate the use of catalysts and high temperatures, it simplifies technology of the production of phenol-formaldehyde oligomers.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: March 27, 1979
    Inventors: Modest S. Akutin, Alexandr N. Ustkachkintsev, Boris V. Yakobson, Boris A. Potapov, Irina I. Zhuravleva, Galina B. Kopteva