Patent ID: 11873416
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 14:
15. 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 polyisocyanate composition and a polyol composition,
the porous filler contains SiO2 in an amount of 50 mass % or more and 95 mass % or less as a constituent component, and
the polyol composition contains a polyrotaxane or a urethane polyol as a polyol component, wherein the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via a —O—C3H6—O— group, and an amount of the polyrotaxane in the polyol component is 30 mass % or more; and the urethane polyol includes a polyether diol having a number average molecular weight in a range of from 600 to 3000 as a constituent component.