The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2008
Filed:
May. 17, 2004
Constantin Alexandrovich Dubkov, Novosibirsk, RU;
Sergey Vladimirovich Semikolenov, Novosibirsk, RU;
Vladimir Alexandrovich Zakharov, Novosibirsk, RU;
Valentin Nikolaevich Parmon, Novosibirsk, RU;
Ludmila Gennadyevna Echevskaya, Novosibirsk, RU;
Evgeny Vladimirovich Starokon, Bersk, RU;
Gennady Ivanovich Panov, Novosibirsk, RU;
Constantin Alexandrovich Dubkov, Novosibirsk, RU;
Sergey Vladimirovich Semikolenov, Novosibirsk, RU;
Vladimir Alexandrovich Zakharov, Novosibirsk, RU;
Valentin Nikolaevich Parmon, Novosibirsk, RU;
Ludmila Gennadyevna Echevskaya, Novosibirsk, RU;
Evgeny Vladimirovich Starokon, Bersk, RU;
Gennady Ivanovich Panov, Novosibirsk, RU;
Abstract
The invention discloses a method for selectively introducing carbonyl groups into polymers by oxygenation of double C═C bonds of polymers with the aid of nitrous oxide (NO) at a temperature comprised between 50 and 350° C. and a pressure of NO of from 0.01 to 100 atmospheres. The introduction of an insignificant amount of C═O groups allows one to modify the physico-chemical properties of a polymer, with its molecular weight and molecular-weight distribution preserved. Deeper oxygenation results in controlled cleavage of polymer macromolecules and makes it possible to produce oxygen-containing oligomers having a desired molecular weight.