Polybutadiene derivative composition

A curable composition containing 0.1-99.9999% by weight of a component (A) and 0.0001-10% by weight of a component (B), wherein:

• the component (A) is a (meth)acrylic modified (hydrogenated) polybutadiene polymer represented by formula (I):
• where:
• P represents a polymer having:
• 0-100 mol % of a repetition unit represented by formula (II):
• wherein the solid and dotted double line part represents a single bond or a double bond;
• and
• 100-0 mol % of a repetition unit represented by formula (III):
• wherein the solid and dotted double line part represents a single bond or a double bond;
• X1 and X2 each independently represents a C1-C20 linking group which may comprise an oxygen atom and/or a nitrogen atom;
• Y1 represents a hydrogen atom, hydroxyl group, carboxyl group or (meth)acryloyloxy group;
• and
• R1 represents a hydrogen atom or methyl group;
• and
• the component (B) is a compound represented by formula (IV):
• where:
• each R2 independently represents:
• a C1-C20 alkyl group which may have a substituent,
• a phenyl group which may have a substituent, or
• a benzyl group which may have a substituent;
• and
• R3 and R4 each independently represents:
• a hydrogen atom,
• a C1-C10 alkyl group which may have a substituent, or
• a C5-C12 cycloalkyl group which may have a substituent.