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Three products were obtained from the condensation of citric acid with: propane-1,2-diol with the catalyst Tyzor TPT (HDCA1), propane-1,2-diol without a catalyst (HDCA2) and propane-1,3-diol with the catalyst Tyzor TPT (HDCA3). We measured the viscosities (from 3972 mPa • s for HDCA1 to 27 986 mPa • s for HDCA3), densities (about 1200 g/cm3), hydroxyl values (280–427 mg KOH/g), and acid values (23–52...
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