Lithographic printing plate precursor, method for making lithographic printing plate, organic polymer particle, and photosensitive resin composition

A lithographic printing plate precursor comprising:

• an image-recording layer on a hydrophilic support,
• wherein the image-recording layer includes an organic polymer particle, and
• the organic polymer particle has a structure derived from an aromatic polyvalent isocyanate compound having a structure represented by Formula PO, and has a net structure formed by a urea bond,
• in Formula PO, RPO1 represents an alkylene group, n represents an integer of 2 to 200, RPO2 represents an alkyl not including a radical polymerizable group, and * represents a bonding site to other structures, and
• wherein the aromatic polyvalent isocyanate compound having the structure represented by Formula PO includes a compound having a structure represented by Formula A-1 and a structure represented by Formula B-1,
• in Formula A-1, ArA represents an aromatic ring structure, LA's each independently represent a single bond or a divalent linking group, nA1 represents an integer of 1 to 4, RA's each independently represent a monovalent group, nA2 represents an integer of 0 to 3, * and a wavy line portion each independently represent a bonding site to other structures, and mA represents 0 or 1, and
• in Formula B-1, ArB represents an aromatic ring structure, LB's each independently represent a single bond or a divalent linking group, RPO's each independently represent a group including the structure represented by Formula PO, nB1 represents an integer of 1 to 4, RB' s each independently represent a monovalent substituent, nB2 represents an integer of 0 to 3, * and a wavy line portion each independently represent a bonding site to other structures, and mB represents 0 or 1.