Polyester-based thermoplastic elastomers containing plasticizers for making golf balls
First Claim
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1. A golf ball, comprising:
- a) dual core comprising an inner core and outer core layer, the inner core having an outer surface and geometric center and the outer core layer having an outer surface and midpoint;
the inner core comprising a polyester-based thermoplastic elastomer composition, the polyester-based composition comprising;
i) about 40 to about 99% by weight polyester thermoplastic elastomer; and
ii) about 1 to about 60% by weight of an alkyl oleate plasticizer selected from the group consisting of methyl oleate, ethyl oleate, propyl oleate, butyl oleate, and octyl oleate, and mixtures thereofand the outer core layer comprising a rubber composition, wherein the center and outer surface of the inner core each has a hardness, and the outer surface hardness is greater than the center hardness to provide a positive hardness gradient in the inner core; and
b) a cover having at least one layer disposed about the core.
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Abstract
Multi-layered golf balls having at least one layer made of a polyester composition containing a polyester thermoplastic elastomer and plasticizer are provided. The plasticizers help reduce the glass transition temperature (Tg) of the composition and various plasticizers may be used. For example, the composition may include alkyl oleate plasticizers such as ethyl oleate and octyl oleate. Polyester-ether block copolymers are particularly preferred. The golf ball includes a core having at least one layer and a cover having at least one layer. The polyester composition may be used to form any core, cover, or other layer in the golf ball.
55 Citations
6 Claims
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1. A golf ball, comprising:
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a) dual core comprising an inner core and outer core layer, the inner core having an outer surface and geometric center and the outer core layer having an outer surface and midpoint;
the inner core comprising a polyester-based thermoplastic elastomer composition, the polyester-based composition comprising;i) about 40 to about 99% by weight polyester thermoplastic elastomer; and ii) about 1 to about 60% by weight of an alkyl oleate plasticizer selected from the group consisting of methyl oleate, ethyl oleate, propyl oleate, butyl oleate, and octyl oleate, and mixtures thereof and the outer core layer comprising a rubber composition, wherein the center and outer surface of the inner core each has a hardness, and the outer surface hardness is greater than the center hardness to provide a positive hardness gradient in the inner core; and b) a cover having at least one layer disposed about the core. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification