Patent ID: 8709613

Claim:
An aromatic amine derivative represented by general formula (A): wherein R 1 and R 2 are each independently selected from the group consisting of a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, and a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms; A 1 , A 2 , A 3 and A 4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms, however, a case where any substituent of each group represented by R 1 , R 2 , A 1 , A 2 , A 3 and A 4 comprises a vinyl group is excluded; p, q, r and s each independently represents an integer of 1 to 5; when p represents an integer of 2 or greater, each of plural A 1 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when q represents an integer of 2 or greater, each of plural A 2 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; when r represents an integer of 2 or greater, each of plural A 3 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring; and when s represents an integer of 2 or greater, each of plural A 4 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring.