Scratch and recovery characteristics of automotive clearcoats containing blocked polyisocyanate crosslinkers was written by Noh, Seung Man;Nam, Joon Hyun;Oh, Jung Kwon;Jung, Hyun Wook. And the article was included in Journal of Coatings Technology and Research in 2015.Computed Properties of C30H56N2O4 This article mentions the following:
Scratch characteristics and self-recovery behaviors of automotive clearcoats including newly designed silane-modified blocked polyisocyanate (SMBI) as an organic-inorganic hybrid crosslinker were compared with those with the com. well-known crosslinkers such as blocked HDI-based and blocked IPDI-based polyisocyanates. To extensively scrutinize the effects of various crosslinkers with different chem. structures on the chem. and mech. properties of clearcoats themselves, rigid-body pendulum tester anal., creep-recovery anal., and FTIR anal. were performed, resulting in a noticeable variation in curing features and crosslinking networks. Employing the overall coating systems by depositing clearcoats with different crosslinkers above the same undercoats on galvanized steel, the scratch behaviors on the surface of the outermost clearcoat layer were examined via the nano-scratch tester for scratch depth profiles and at. force microscopy for three-dimensional scratch images, under various self-reflow temperatures and duration time periods. The results demonstrated that the SMBI crosslinker induced a considerably higher degree of crosslinked networks, through the reaction of urethane bonds and silanol bonds in clearcoats, in comparison with the blocked HDI and IPDI polyisocyanates. Also, the recoverable behaviors of scratched clearcoats containing different blocked polyisocyanates were affected by the intrinsic chem. structures of crosslinkers, as well as scratch-recovery conditions such as external temperature and duration times. In the experiment, the researchers used many compounds, for example, Bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate (cas: 41556-26-7Computed Properties of C30H56N2O4).
Bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate (cas: 41556-26-7) belongs to piperidine derivatives. The piperidine structural motif is present in numerous natural alkaloids. These include piperine, which gives black pepper its spicy taste. The piperidine and polyhydroxylated indolizidine derivatives have shown to be promising 伪-glucosidase inhibitors. The former are analogs of DNJ with an improved 伪-glucosidase inhibitory profile than that of DNJ. Boisson et al.Computed Properties of C30H56N2O4
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem