The possibility of the cleavage of the C-C bond in acetylcyclopropane (ACP) under the action of water or alcohols in the presence of copper or palladium salts was demonstrated for the first time. At 175-180 degreesC, the reactions proceeded regioselectively with the cleavage of the C(1)-C(2) bond in the cyclopropane ring. The reaction of ACP with water afforded 5-hydroxypentan-2-one, bis(3-acetylpropyl) ether, and furan compounds, whereas the reactions with alcohols proceeded selectively to form 5-alkoxypentan-2-ones. The yields of the latter depend on the nature and structure of the alcohol, the maximum values (98%) being achieved in the case of primary alcohols.
Composition of Decolorable Ink and Decoloring Method
申请人:Han Jong-Soo
公开号:US20100255215A1
公开(公告)日:2010-10-07
The present invention is a method which erase information printed on a recording medium if necessary and thus reuse the recording medium, and includes 1) decolorable ink compositions which are not erased during the use but erased by a dye readily decolorable by a decolorant, 2) a decolorant composition including a thermal initiator or photoinitiator, and 3) a method for coating the decolorant and applying heat or irradiating UV to erase the dye. According to the present invention, it is possible to prepare various writing inks, and particularly, when applied to recording medium with a magnetic stripe as well as the general purpose papers, it is possible to reduce the production cost significantly, obtain a large import substitution effect of the magnetic ink all of which are imported, and largely reduce the environmental pollution.
US8378006B2
申请人:——
公开号:US8378006B2
公开(公告)日:2013-02-19
[EN] THE COMPOSITION OF DECOLORABLE INK AND DECOLORING METHOD<br/>[FR] COMPOSITION D'ENCRE DÉCOLORABLE ET PROCÉDÉ DE DÉCOLORATION
申请人:HAN JONG-SOO
公开号:WO2009054621A2
公开(公告)日:2009-04-30
The present invention is a method which erase information printed on a recording medium if necessary and thus reuse the recording medium, and includes 1) decolorable ink compositions which are not erased during the use but erased by a dye readily decolorable by a decolorant, 2) a decolorant composition including a thermal initiator or photoinitiator, and 3) a method for coating the decolorant and applying heat or irradiating UV to erase the dye. According to the present invention, it is possible to prepare various writing inks, and particularly, when applied to recording medium with a magnetic stripe as well as the general purpose papers, it is possible to reduce the production cost significantly, obtain a large import substitution effect of the magnetic ink all of which are imported, and largely reduce the environmental pollution.
——
作者:U. M. Dzhemilev、R. I. Khusnutdinov、A. M. Atnabaeva、Z. S. Muslimov、R. I. Parfenova、Yu. V. Tomilov
DOI:10.1023/a:1014010907818
日期:——
The possibility of the cleavage of the C-C bond in acetylcyclopropane (ACP) under the action of water or alcohols in the presence of copper or palladium salts was demonstrated for the first time. At 175-180 degreesC, the reactions proceeded regioselectively with the cleavage of the C(1)-C(2) bond in the cyclopropane ring. The reaction of ACP with water afforded 5-hydroxypentan-2-one, bis(3-acetylpropyl) ether, and furan compounds, whereas the reactions with alcohols proceeded selectively to form 5-alkoxypentan-2-ones. The yields of the latter depend on the nature and structure of the alcohol, the maximum values (98%) being achieved in the case of primary alcohols.