The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. SDS of cas: 35344-95-7, 35344-95-7, Name is 1H-Pyrazole-4-carbaldehyde, SMILES is O=CC1=CNN=C1, in an article , author is Jana, Sourita, once mentioned of 35344-95-7.
Bromo-substituted blocked hexamethylene diisocyanate adduct: synthesis, characterization and application toward polyurethane coating
Hexamethylene diisocyanate (HMDI) reacts with 4-bromo-1H-pyrazole as a blocking agent to form blocked adducts of isocyanates. The adducts were characterized by FTIR, NMR, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). In the FTIR spectra, disappearance of a peak at 2250-2270 cm(-1) is the indication of blocking of diisocyanate molecule with 4-bromo-1H-pyrazole blocking agent. The DSC thermogram shows that at 185 degrees C, the blocked adduct de-blocks and HMDI and blocking agent 4-bromo-1H-pyrazole has been regenerated. At 185 degrees C, regenerated HMDI reacts with polyols of different molecular weights to form polyurethane. The polyurethanes were characterized by FTIR, NMR, DSC, TGA and contact angle measurements. These are useful for hydrophilic coating.
But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 35344-95-7, you can contact me at any time and look forward to more communication. SDS of cas: 35344-95-7.
Reference:
Pyrazole – Wikipedia,
,Pyrazoles – an overview | ScienceDirect Topics