Kim, Soeun et al. published their research in Progress in Organic Coatings in 2021 | CAS: 2387-23-7

1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. Amides are pervasive in nature and technology. Proteins and important plastics like Nylons, Aramid, Twaron, and Kevlar are polymers whose units are connected by amide groups (polyamides); these linkages are easily formed, confer structural rigidity, and resist hydrolysis. Amides are not in general accessible by the direct condensation of amines with carboxylic acids for two reasons: first, both components are readily deactivated by a transfer of a proton from the acid to the amine and second, the hydroxy unit on the carbonyl of the acid is a relatively poor leaving group. Nevertheless, the formation of five- and six-membered rings is often surprisingly simple provided that other factors can be brought into play to assist in the condensation.Name: 1,3-Dicyclohexylurea

Dual-curable isocyanate crosslinking agents blocked by methacrylate-functionalized pyrazoles with lower curing temperature was written by Kim, Soeun;Hong, Jun Ui;Ha, Miran;Noh, Seung Man. And the article was included in Progress in Organic Coatings in 2021.Name: 1,3-Dicyclohexylurea This article mentions the following:

To develop a polyurethane-based automotive clearcoat with a lower curing temperature, methacrylate-functionalized pyrazole derivatives were newly designed and synthesized as isocyanate blocking agents and their chem. structures were identified by 1H NMR. These novel blocking agents were used to block the functional groups of hexamethylene diisocyanate (HDI) trimer (com. known as Desmodur N3300), and d. functional theory simulations were performed to predict the activation energy of the deblocking process and to determine the H-N distance in the pyrazole mols. The curing behavior of the blocked isocyanate with polyol resin at 110, 120, and 130°C was investigated using an oscillatory rheometer and a rigid-body pendulum tester. In addition, their results were compared with those for a com. available 3,5-di-Me pyrazole-blocked HDI trimer (Desmodur PL350). The thermal properties of the clearcoat films cured at 130°C were investigated using thermogravimetric anal., differential scanning calorimetry, and dynamic mech. anal., and the surface mech. properties of the cured films were evaluated using a nano-indentation tester. The novel pyrazole blocking agents contributed to lowering the deblocking temperature and enhancing the mech. properties via supplementary radical polymerization of deblocked methacrylate-functionalized pyrazoles, resulting in interpenetrating crosslinked polymer networks. This study provides a new concept of isocyanate blocking agents with lower deblocking temperatures and higher crosslinking densities, resulting in blocked isocyanates that can be used in various coating materials. In the experiment, the researchers used many compounds, for example, 1,3-Dicyclohexylurea (cas: 2387-23-7Name: 1,3-Dicyclohexylurea).

1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. Amides are pervasive in nature and technology. Proteins and important plastics like Nylons, Aramid, Twaron, and Kevlar are polymers whose units are connected by amide groups (polyamides); these linkages are easily formed, confer structural rigidity, and resist hydrolysis. Amides are not in general accessible by the direct condensation of amines with carboxylic acids for two reasons: first, both components are readily deactivated by a transfer of a proton from the acid to the amine and second, the hydroxy unit on the carbonyl of the acid is a relatively poor leaving group. Nevertheless, the formation of five- and six-membered rings is often surprisingly simple provided that other factors can be brought into play to assist in the condensation.Name: 1,3-Dicyclohexylurea

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics