Patent ID: 11952343
Assignee: LG CHEM, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 14:
15. A method for preparing a diamine having the structure of formula 1, the method comprising the steps of:
reacting a compound of the formula (i) with a compound of the formula (ii) to obtain a compound of the formula (iii);
reacting the compound of the formula (iii) with a compound of the formula (iv) to obtain a compound of the formula (v); and
reducing the compound of the formula (v) to obtain the diamine of the formula 1:, wherein,
Za to Zd are each independently a carbon atom or a nitrogen atom, with the proviso that Za to Zd are not nitrogen atoms at the same time, R1, R2 and Ra are each independently selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkenyl group having 1 to 10 carbon atoms, and an aryl group having 6 to 18 carbon atoms, n1, n2 and n are each independently an integer of 0 to 4, and X is a single bond or a functional group selected from the group consisting of O, S, S—S, C(═O), —C(═O)O—, CH(OH), S(═O)2, Si(CH3)2, CR′R″, C(═O)NH and a combination thereof, wherein R′ and R″ are each independently selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms and a fluoroalkyl group having 1 to 10 carbon atoms.