Role of additives in cobalt-mediated oxidative crosslinking of alkyd resins

被引：25
作者：
Tanase, S [1 ]
Bouwman, E [1 ]
Reedijk, J [1 ]
机构：
[1] Leiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, Netherlands
来源：
APPLIED CATALYSIS A-GENERAL | 2004年 / 259卷 / 01期
关键词：
cobalt; drier; ethyl linoleate; alkyd paint; pyrazole; anti-skinning; coating;
D O I：
10.1016/j.apcata.2003.09.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Spectroscopic and chromatographic studies have been carried out to investigate the interaction between bis(acetylacetonato)cobalt(II) and pyrazole ligands as possible anti-skinning additives, and their role in the oxidative crosslinking reactions has been tested. From experimental results (UV-Vis, TR-FTIR, SEC) it has been concluded that Co(acac)(2) can be used as drier promoter for alkyd paints and its catalytic activity is similar to that of the actual commercial drier (Co Nuodex). The presence of pyrazole ligands as anti-skinning additives precludes association of Co(acac)2 that usually occurs in nonpolar media and it facilitates the formation of stable coordinated ROO. radicals, that inhibit the radical chain reaction. From EPR results it has been established that the stability of the [Co-III(acac)(2)(ROO.)L](+) complex radicals is highly dependent of the molar ratio between the cobalt catalyst and the organic additive L. The dependence of anti-skinning activity on the concentration of the pyrazole additives has been studied and a mechanism of inhibiting properties of azoles on the oxidative crosslinking reactions has been proposed. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：101 / 107
页数：7
相关论文
共 50 条
[21]   Cobalt-Mediated Radical Coupling (CMRC): An Unusual Route to Midchain-Functionalized Symmetrical Macromolecules [J].
Debuigne, Antoine ;
Poli, Rinaldo ;
De Winter, Julien ;
Laurent, Pascal ;
Gerbaux, Pascal ;
Dubois, Philippe ;
Wathelet, Jean-Paul ;
Jerome, Christine ;
Detrembleur, Christophe .
CHEMISTRY-A EUROPEAN JOURNAL, 2010, 16 (06) :1799-1811
[22]   Isoprene-Assisted Radical Coupling of (Co)polymers Prepared by Cobalt-Mediated Radical Polymerization [J].
Debuigne, Antoine ;
Jerome, Christine ;
Detrembleur, Christophe .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2009, 48 (08) :1422-1424
[23]   Study of the diastereoselectivity of cobalt-mediated [2+2+2] cycloadditions of substituted linear enediyne esters [J].
Slowinski, F ;
Aubert, C ;
Malacria, M .
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, 2001, 2001 (18) :3491-3500
[24]   Direct and Efficient (Carbonyl)cobalt-Mediated Aryl Acetylation Using [11C] Methyl Iodide [J].
Dahl, Kenneth ;
Schou, Magnus ;
Halldin, Christer .
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, 2016, 2016 (16) :2775-2777
[25]   Effect of cobalt-mediated Toll-like receptor 4 activation on inflammatory responses in endothelial cells [J].
Anjum, Sami A. ;
Lawrence, Helen ;
Holland, James P. ;
Kirby, John A. ;
Deehan, David J. ;
Tyson-Capper, Alison J. .
ONCOTARGET, 2016, 7 (47) :76471-76478
[26]   Ethanolic Extract of Moringa oleifera Leaves Influences NF-κB Signaling Pathway to Restore Kidney Tissue from Cobalt-Mediated Oxidative Injury and Inflammation in Rats [J].
Abdel-Daim, Mohamed M. ;
Khalil, Samah R. ;
Awad, Ashraf ;
Abu Zeid, Ehsan H. ;
El-Aziz, Reda Abd ;
El-Serehy, Hamed A. .
NUTRIENTS, 2020, 12 (04)
[27]   Stereoselective cobalt-mediated [2+2+2]cycloadditions to the benzofuran nucleus:: A novel strategy towards the synthesis of morphinoids [J].
Pérez, D ;
Siesel, BA ;
Malaska, MJ ;
David, E ;
Vollhardt, KPC .
SYNLETT, 2000, (03) :306-310
[28]   Stoichiometric and Catalytic ( η 5 -Cyclopentadienyl)cobalt-Mediated Cycloisomerizations of Ene-Yne-Ene Type Allyl Propargyl Ethers [J].
Chang, Chu-An ;
Gurtzgen, Stefan ;
Johnson, Erik P. ;
Vollhardt, K. Peter C. .
SYNTHESIS-STUTTGART, 2020, 52 (03) :399-416
[29]   Anchoring of Silyl Donors on a N-Heterocyclic Carbene through the Cobalt-Mediated Silylation of Benzylic C-H Bonds [J].
Mo, Zhenbo ;
Liu, Yang ;
Deng, Liang .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2013, 52 (41) :10845-10849
[30]   Synthesis of poly(vinyl acetate)-graft-polystyrene by a combination of cobalt-mediated radical polymerization and atom transfer radical polymerization [J].
Kaneyoshi, Hiromu ;
Matyjaszewski, Krzysztof .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2007, 45 (03) :447-459
12345