Patent ID: 11872451
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC A  C | IPC A  C

Claim 0:
1. A golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body,
wherein an outermost layer of the paint film located at the outermost layer of the golf ball contains a base resin and a porous filler,
the base resin contains a polyurethane obtained by a reaction between (A) a polyisocyanate composition and (B) a polyol composition containing a urethane polyol as a polyol component,
the porous filler contains SiO2 in an amount of 50 mass % or more and 95 mass % or less as a constituent component, and
a loss tangent (tanδ) of the outermost layer of the paint film measured with a dynamic viscoelasticity measuring apparatus under following conditions has a peak temperature in a range of from −40° C. to 40° C.:
<measurement conditions>
measuring mode: tensile mode
measuring temperature: −100° C. to 150° C.
temperature increasing rate: 4° C./min
oscillation frequency: 10 Hz
measuring strain: 0.1%.