2009
DOI: 10.1007/s11998-009-9174-4
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The behavior of MEKO-blocked isocyanate compounds in aluminum flake pigmented, polyester–polyurethane can coating systems

Abstract: Information is given concerning the curing characteristics of polyester-polyurethane (PEPU)-based food can coatings and the analysis of the free isocyanate by-products. The behavior of a methyl ethyl ketoxime (MEKO)-blocked isocyanate on heating was studied using thermal analytical techniques. Following this, the curing behavior of a PEPU-based can coating (PEPU01 that contained an aluminum flake pigment) and the MEKO-blocked isocyanate was investigated. A study of the unblocking of the MEKO-blocked isocyanate… Show more

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Cited by 8 publications
(8 citation statements)
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“…This observation confirms that isocyanate groups were completely reacted with aromatic secondary amines. Similar to FTIR spectra 1 H and 13 C-NMR spectra also show identical peaks for all blocked isocyanates (1)(2)(3)(4)(5). A typical example of proton and carbon NMR is given in Figures 3 and 4, respectively.…”
supporting
confidence: 61%
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“…This observation confirms that isocyanate groups were completely reacted with aromatic secondary amines. Similar to FTIR spectra 1 H and 13 C-NMR spectra also show identical peaks for all blocked isocyanates (1)(2)(3)(4)(5). A typical example of proton and carbon NMR is given in Figures 3 and 4, respectively.…”
supporting
confidence: 61%
“…2-5 mg of blocked isocyanates (1)(2)(3)(4)(5) were sealed in hermetic aluminum pans and the experiments were carried out from ambient temperature to 350 C at a heating rate of 10 C/min under nitrogen atmosphere.…”
Section: Methodsmentioning
confidence: 99%
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“…[1][2][3] In order to meet the demand of various applications, the types of diisocyanates play a very important role during the synthesis of polyurethanes. As is known, most established diisocyanates based on isophorone diisocyanate (IPDI) or toluene diisocyanate (TDI) lead to high toxicity and carcinogenicity, as well as rather high activity due to their free isocyanate groups, which readily react with the functional groups.…”
Section: Introductionmentioning
confidence: 99%