Patent ID: 9482656
Filing Date: 2016-11-01
CPC Classification: C10L,C10M,C10N,G01N,Y10T

Claim Text:
1. An oil marker composition comprising a diamine-based compound represented by the following Chemical Formulae (2) or (3), and generating a color reaction by ninhydrin: (In Chemical Formula (2), R1 to R4 are each independently substituted or unsubstituted (C1-C12)alkyl, or hydrogen; n is an integer of 1 to 8, and in Chemical Formula (3), R1 to R4 are each independently hydrogen, substituted or unsubstituted (C1-C12)alkyl, or (C6-C20)aryl; R5 to R8 are each independently hydrogen, halogen, (C1-C12)alkyl, (C6-C20)aryl, carboxyl (C═(O)OH), amino, cyano, nitro, or hydroxyl; R5 to R8 are each independently bonded to each other to form an aromatic ring, a carbon atom of the aromatic ring being substituted with any one or more hetero atoms selected from N, S, and O; and R1 to R4 are each independently bonded to any one selected from R5 to R8 to form an aliphatic ring, the aliphatic ring being further substituted with one or more substituents selected from halogen, (C1-C10)alkyl, carboxyl (C═(O)OH), cyano, nitro, and hydroxyl).