▎ 摘　　要

NOVELTY - Golf ball (10) comprises an inner core (12a) comprising a polybutadiene material, an outer core (12b) comprising polybutadiene material and 0.1-0.5 wt.% graphene masterbatch, where the graphene masterbatch material comprises 0.1-80 wt.% graphene mixed with 20-99.9 wt.% carrier polymer, and the outer core has a flexural modulus of 80-95 MPa, and a cover layer (16) arranged over the outer core, where a dual core comprising the inner core and the outer core has a compression value of 40-55. The golf ball comprises a mantle layer arranged over the outer core, and a cover layer arranged over the mantle layer. USE - As golf ball. ADVANTAGE - The golf ball has improved aging properties due to the incorporation of graphene in the core for excellent retention of compression and coefficient of restitution (COR) over time, achieves excellent dispersion of graphene without the need to use any oxidizing/reducing agents or solvents, is environmentally friendly and does not use any strong solvent, any strong oxidizing or reducing agents for modifying or dispersing graphene. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded partial cut-away view of a golf ball. Golf ball (10) Inner core (12a) Outer core (12b) Inner mantle layer (14a) Outer mantle layer (14b) Cover layer (16)