Highly-resilient thermoplastic elastomer compositions
First Claim
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1. A composition comprisinga) an acid copolymer of the composition E/X/Y wherein E is ethylene, X is an α
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ethylenically unsaturated carboxylic acid, and Y is a C1-8 alkyl acrylate or alkyl methacrylate, X is present in 6-35 wt. % of the acid copolymer, and Y is present in 5-25 wt. % of the acid copolymer;
b) about 10 to about 45 wt. % of a high molecular weight, monomeric organic acid or salt thereof based on total weight of components a), b), and c) provided that component (b) does not exceed 50 wt. % of (a) plus (b);
c) about 1 to about 30 wt. % thermoplastic elastomer selected from copolyetheramides, copolyetheresters, elastomeric polyolefins, block polystyrene polydiene copolymers, and thermoplastic polyurethanes;
d) a cation source present at a level sufficient to neutralize 80 to 110% of the combined acid content of components a) and b); and
e) zero to about 60 wt. % filler based on weight of components a) plus b) plus c) plus e).
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Abstract
A thermoplastic composition of (a) an acid copolymer, (b) a salt of a high molecular weight, monomeric organic acid; (c) a thermoplastic polymer selected from copolyetheresters, elastomeric polyolefins, styrene diene block copolymers, elastomeric polyolefins thermoplastic polyurethanes and copolyetheramides; (d) cation source; and (d) optionally a filler. Also included is use of such compositions in components of one-, two- and three-piece golf balls or multi-layered golf balls made therefrom.
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Citations
8 Claims
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1. A composition comprising
a) an acid copolymer of the composition E/X/Y wherein E is ethylene, X is an α - ,β
ethylenically unsaturated carboxylic acid, and Y is a C1-8 alkyl acrylate or alkyl methacrylate, X is present in 6-35 wt. % of the acid copolymer, and Y is present in 5-25 wt. % of the acid copolymer;
b) about 10 to about 45 wt. % of a high molecular weight, monomeric organic acid or salt thereof based on total weight of components a), b), and c) provided that component (b) does not exceed 50 wt. % of (a) plus (b);
c) about 1 to about 30 wt. % thermoplastic elastomer selected from copolyetheramides, copolyetheresters, elastomeric polyolefins, block polystyrene polydiene copolymers, and thermoplastic polyurethanes;
d) a cation source present at a level sufficient to neutralize 80 to 110% of the combined acid content of components a) and b); and
e) zero to about 60 wt. % filler based on weight of components a) plus b) plus c) plus e). - View Dependent Claims (2)
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3. A one-piece golf ball comprising the composition of
a) an ethylene/(meth)acrylic acid/n-butyl acrylate terpolymer of the composition E/X/Y wherein E is ethylene, X is acrylic acid or methacrylic acid, and Y is n-butyl acrylate, X is present in 4-35 wt. % of the terpolymer, and Y is present in an amount up to 50 wt. % of the terpolymer; -
b) about 10 to about 45 wt. % of a high molecular weight, monomeric fatty acid based on total weight of components a), b), and c) provided that component (b) does not exceed 50 wt. % of (a) plus (b);
c) about I to about 35 wt. % of a polyetherester having a shore D hardness of about 30-40;
d) a magnesium cation source present at a level sufficient to neutralize 95 to 110% of the combined acid content of components a) and b); and
e) ZnO present in a sufficient amount to adjust the density of the composition to a level that results in a golf ball that weighs about 45.93 grams.
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4. A two-piece golf ball comprising a core and a cover, wherein the core comprises the composition of
a) an acid terpolymer of the composition E/X/Y wherein E is ethylene, X is acrylic acid or methacrylic acid, and Y is a C1-8 alkyl acrylate or alkyl methacrylate, X is present in 4-35 wt. % of the acid terpolymer, and Y is present in an amount up to 50 wt. % of the acid terpolymer; -
b) about 10 to about 45 wt. % of a high molecular weight, monomeric stearic acid or oleic acid or salt thereof based on total weight of components a), b), and c) provided that component (b) does not exceed 50 wt. % of (a) plus (b);
c) about 1 to about 35 wt. % polyetherester having a shore D hardness of about 30-40;
d) a cation source present at a level sufficient to neutralize 50 to 110% of the combined acid content of components a) and b); and
e) sufficient filler selected from ZnO and BaSO4 to adjust the density of the core to about 1.18 gm/cc. - View Dependent Claims (5, 6)
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7. A three-piece golf ball comprised of a center, an elastomeric winding and a cover, wherein the center comprises the composition of
a) an acid copolymer of the composition E/X/Y wherein E is ethylene, X is an α - ,β
ethylenically unsaturated carboxylic acid, and Y is a C1-8 alkyl acrylate or alkyl methacrylate, X is present in 4-35 wt. % of the acid copolymer, and Y is present in 0-50 wt. % of the acid copolymer;
b) about 10 to about 45 wt. % of a high molecular weight, monomeric organic acid or salt thereof based on total weight of components a), b), and c) provided that component (b) does not exceed 50 wt. % of (a) plus (b);
c) about 1 to about 35 wt. % thermoplastic elastomer selected from copolyetheramides, copolyetheresters, elastomeric polyolefmns, block polystyrene polydiene copolymers, and thermoplastic polyurethanes;
d) a cation source present at a level sufficient to neutralize 50 to 110% of the combined acid content of components a) and b); and
e) filler, present in a type and amount sufficient to achieve a density between the density of the composition without filler and 1.8 grams per cubic centimeter. - View Dependent Claims (8)
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Specification