Golf ball and method for producing the same
AssigneeDunlop Sports Co. Ltd.
InventorsKazuyoshi Shiga, Takashi Sasaki
Life of this patent
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Abstract
An object of the present invention is to improve the abrasion resistance and controllability in a golf ball having a polyurethane cover containing a layered silicate or the exfoliated layer thereof. The present invention provides a golf ball comprising a core and a cover covering the core, wherein the cover comprises a polyurethane resin having a secondary or tertiary amine structure in a molecular chain thereof, the secondary or tertiary amine structure being cationized, and a layered silicate and/or an exfoliated product thereof, having an average aspect ratio of unit layers thereof ranging from 10 to 50.
Claims17
A golf ball comprising a core and a cover covering the core, wherein the cover comprises
- a polyurethane resin having a molecular chain with a secondary or tertiary amine structure, the secondary or tertiary amine structure being cationized, and
- an exfoliated product of a layered silicate including a synthetic hectorite and having unit layers with an average aspect ratio ranging from 10 to 50, wherein the unit layers of the layered silicate have an average width ranging from 10 nm to 50 nm.
A method for producing a golf ball having a core and a cover covering the core, comprising the steps of:
- providing a core,
- cationizing a polyol having a secondary or tertiary amine structure present in a molecule thereof,
- dispersing a layered silicate including a synthetic hectorite and having a BET specific surface area of 300 m2/g or more, an average aspect ratio of unit layers thereof ranging from 10 to 50 and an average width of unit layers thereof ranging from 10 nm to 50 nm into the cationized polyol to obtain a polyol-layered silicate composite,
- mixing the polyol-layered silicate composite, a polyol component, and a polyisocyanate component to prepare a cover composition, and
- molding a cover from the cover composition to cover the core.
Dependencies are inferred from the claim text.