Hardener M is based on HDT technology, trimer of hexamethylene di-isocyanate (HD1), and Hardener D is based on both HDT and IPDT, trimer of isophorone diisocyanate (1PDI) technology.
5 It was also found that the fluorinated acrylic polyol has lower reactivity towards hydrophilic polyisocyanates, especially Hardener D that contains IPDT.
In the polyisocyanate side, two types of hydrophilic polyisocyanates are used: Hardener 1, which is HDT-based polyisocyanate, and Hardener 2, which incorporates bodi HDT and IPDT.
2) Incorporating IPDT in the HDT-based polyiso cyanate (Hardener 2) will improve anti-graffiti performance towards every testing graffiti except the black Sharpie.
The lower crosslinking density of the coatings incorporating IPDT does not give a definite explanation to the DOE analysis as Hardener 2 delivers better anti-graffiti performance.
Ea, n, ITS, IPDT, H, S and G will be drawn from TG analysis and decomposition kinetics.
The ITS and IPDT values for dextran acetates 1-3 were found to be in the range 0.
IPDT and ITS values, indicated that dextran acetates are thermally more stable entities as compared to unmodified dextran.