Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsMami Tanaka, Toshiyuki Tarao
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to provide a golf ball having excellent abrasion resistance and spin performance on driver shots. The present invention provides a golf ball having a spherical core and a cover covering the spherical core, wherein the cover contains a polyurethane, wherein the polyurethane comprises, as a constituent component, (A) a polyisocyanate component and (B) a polyol component containing (b1) a polyrotaxane, and wherein (b1) the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and a blocking group 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 —O—C3H6—O— group.
Claims22
A golf ball having a spherical core and a cover covering the spherical core, wherein the cover contains a polyurethane and the polyurethane comprises, as a constituent component, (A) a polyisocyanate component and (B) a polyol component consisting of (b1) a polyrotaxane, or (b1) a polyrotaxane and (b2) a polyol other than (b1) the polyrotaxane and other than a polycarbonate polyol
- wherein (b1) 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 —O—C3H6—O— group.
A golf ball having a spherical core and a cover covering the spherical core, wherein the cover contains a polyurethane and the polyurethane comprises, as a constituent component, (A) a polyisocyanate component and (B) a polyol component containing (b1) a polyrotaxane and (b2) a polyol other than (b1) the polyrotaxane, wherein (b2) the polyol contains a high molecular weight polyol and a low molecular weight polyol, and
- wherein (b1) 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 —O—C3H6—O— group, and (b2) the polyol contains a high molecular weight polyol and a low molecular weight polyol.
Dependencies are inferred from the claim text.