Novel polyurethane coating technology through glycidyl carbamate chemistry |
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Authors: | Peter A Edwards Grant Striemer Dean C Webster |
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Affiliation: | (1) North Dakota State University, 1735 NDSU Research Park Dr., 58105 Fargo, ND |
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Abstract: | Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins.
Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol.
The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and
cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on
the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to
determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model
amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate
functional group is more reactive than a glycidyl ether group.
Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago,
IL. |
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Keywords: | Epoxy resins polyurethanes mechanical properties physical properties thermal properties solvent-based thermoset amines amides epoxy isocyanate |
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