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

Claim 18:
19. 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 as a constituent component,
an amount of the porous filler ranges from 30 parts by mass to 200 parts by mass with respect to 100 parts by mass of the base resin, 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%.