Nylon compositions for golf ball covers and method of making same
OwnerMichelle A. Bellinger, Michael J. Sullivaninventors
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a golf ball with a cover formed from a polyamide composition and a method of making the same. More specifically, the golf ball has a cover which contains a combination of a polyamide component and an ionomeric component or a non-ionomeric terpolymer component. The cover composition has excellent durability and resistance to cracking, even at cold temperatures. The nylon-ionomer blend is a useful substitute for an ionomer golf ball cover, particularly when a low spin golf ball is desired.
Claims34
A golf ball having a cover layer with a resin composition comprising a combination of a polyamide component and an ionomeric component, the content of the polyamide component being at least 23 wt % of the resin composition, the golf ball having a coefficient of restitution of at least 0.750.
A golf ball having a cover layer with a composition comprising a graft copolymer of (1) at least one of a polyamide homopolymer and a polyamide copolymer and (2) a first ionomeric copolymer which is formed from an α-olefin and a carboxylic acid, the cover layer having a Shore D hardness of at least 30, the golf ball having a Durability Rating of at least 2.
A golf ball having a cover layer with a composition comprising a nylon backbone with ionomer grafted thereto, the golf ball having a coefficient of restitution of at least 0.750.
A golf ball having a cover layer with a composition comprising a combination of at least one of a polyamide homopolymer and a polyamide copolymer with a non-ionomeric acid copolymer formed from an α-olefin, an ester, and a carboxylic acid.
A golf ball having a cover layer with a resin composition comprising at least 10 wt % of a graft copolymer of polyepsilon-caprolactam and ionomer, the graft copolymer having a yield tensile strength of about 54 MPa (ASTM D-638), a flexural modulus of about 1585 MPa (ASTM D-790), and a drop weight impact at −40° F. of about 200 J (ASTM D-3029).
A method of making a golf ball, comprising the steps of:
- obtaining a golf ball core, and
- forming a cover layer over the core, the cover layer having a resin composition comprising a combination of a polyamide component and an ionomeric component, the content of the polyamide component being at least 23 wt % of the resin composition, the golf ball having a coefficient of restitution of at least 0.750.
Dependencies are inferred from the claim text.