The aim of this work is to describe the properties of polyurethane coatings prepared starting from perfluoropolyethers (PFPE) of the following type: HOCH2 - CF2 (CF2 O CF2)p (OCF2)q OCF2 - CH2OH (ZDOL) Different fluorinated coatings are analysed: - moisture curing formulations, based on the addition of ZDOL onto the cyclic trimers of hexamethylene diisocyanate HDI (FBZ 1072) and isophorone diisocyanate IPDI (FBZ 1073); - two pack formulations, obtained from FBZ 1072 or FBZ 1073 resins with ZDOL of different molecular weight (polyurethane crosslinked coatings). The influence of the molecular weight of the starting PFPE (ZDOL) on the thermal transitions, mechanical properties and chemical resistance of the crosslinked materials is evaluated through the analysis of DSC traces, DMA curves and EIS spectra.
Study of chemico-physical properties of fluoropolyether coatings
DELUCCHI, MARINA;BARBUCCI, ANTONIO;CERISOLA, GIACOMO
2000
Abstract
The aim of this work is to describe the properties of polyurethane coatings prepared starting from perfluoropolyethers (PFPE) of the following type: HOCH2 - CF2 (CF2 O CF2)p (OCF2)q OCF2 - CH2OH (ZDOL) Different fluorinated coatings are analysed: - moisture curing formulations, based on the addition of ZDOL onto the cyclic trimers of hexamethylene diisocyanate HDI (FBZ 1072) and isophorone diisocyanate IPDI (FBZ 1073); - two pack formulations, obtained from FBZ 1072 or FBZ 1073 resins with ZDOL of different molecular weight (polyurethane crosslinked coatings). The influence of the molecular weight of the starting PFPE (ZDOL) on the thermal transitions, mechanical properties and chemical resistance of the crosslinked materials is evaluated through the analysis of DSC traces, DMA curves and EIS spectra.
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