Golf ball
AssigneeSpalding & Evenflo Companies, Inc.
InventorMichael J. Sullivan
Life of this patent
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Abstract
The subject invention relates to golf ball technology, and more particularly, golf ball cover technology. The invention is concerned with a particular mixture of ionic resins as a golf ball cover composition. Ionomers have been widely used as golf ball cover materials for the past 15 years. While these ionomers are very durable, they have a deficiency as a golf ball cover material in that they tend to be hard. This invention is concerned with a mixture of a hard ionomer with a soft ionomer in order to produce a golf ball cover composition wherein the cover is softer than the prior art ionomer covers. A golf ball covered in accordance with this invention is durable and a skilled golfer can impart back spin to the ball in play.
Claims26
A golf ball comprising a core and a cover, wherein said cover comprises from about 25 to about 75 percent of a hard ionomer which is a sodium or zinc salt of the copolymer of an olefin having from 2 to 8 carbon atoms and an unsaturated monocarboxylic acid having from 3 to 8 carbon atoms, wherein said hard ionomer has a modulus of from about 30,000 to about 50,000 P.S.I. and from about 75 to about 25
- percent of a soft ionomer which is a sodium or zinc salt of a terpolumer of an olefin having from 2 to 8 carbon atoms, an unsaturated monocarboxylic acid having from 3 to 8 carbon atoms, and an unsaturated monomer of the acrylate ester class having from 2 to 22 carbon atoms, wherein said soft ionomer has a modulus of from about 3,000 to 7,000 P.S.I.
Dependencies are inferred from the claim text.