Composition for use in golf balls
The present invention relates to a blend composition, suitable for use in golf ball manufacture, which is the reaction product of (A) a polymer of ethylene and/or an alpha olefin and one or more α, β-ethylenically unsaturated C 3 -C 20 carboxylic acids, sulfonic acids or phosphoric acids; (B) a compound having both amine and carboxylic acid functionality or a derivative of these functional groups; and (C) a basic metal ion salt, which has the capacity to neutralize some or all of the acidic group present in blend components (A) and (B). When (A) is a polymer comprising one or more α, β-ethylenically unsaturated C 3 -C 20 carboxylic acids it comprises a high molecular weight component having a molecular weight from about 80,000 to about 500,000.
1. A blend composition comprising the reaction product of:
(A) a polymer comprising
i. ethylene and/or an alpha olefin; and
ii. one or more α, β-ethylenically unsaturated C 3 -C 20 carboxylic acids, sulfonic acids or phosphoric acids;
wherein the polymer comprising an unsaturated C 3 -C 20 carboxylic acid comprises a high molecular weight component having a weight average molecule weight, Mw, from about 80,000 to about 500,000;
(B) a compound present in an amount from about 0.1 to about 40 phr; and-having a general formula (R 2 N)—R′—(X(O) n OR y ) m , wherein
i. R is selected from the group consisting of
(1) hydrogen,
(2) one or more C 1 -C 20 aliphatic systems,
(3) one or more cycloaliphatic systems,
(4) one or more aromatic systems, and
(5) combinations thereof;
ii R′ is a bridging group comprising
(1) one or more unsubstituted C 1 -C 20 straight chain or branched aliphatic or alicyclic groups, or
(2) one or more substituted straight chain or branched aliphatic or alicyclic groups, or
(3) one or more aromatic groups, or
(4) one or more oligomers, each containing up to 12 repeating units, and
iii. when X=C or S, m is 1-3,
iv. when X=C, n=1 and y=1,
v. when X=S, n=2 and y=1, and
(C) basic metal ion salt, which has the capacity to neutralize some or all of the acidic group present in Blend Components (A) and (B).
2. The blend composition of claim 1 , wherein:
a. said Component (A) is an ethylene α, β-ethylenically unsaturated C 3 -C 20 carboxylic acid copolymer or an ethylene/α, β-ethylenically unsaturated C 3 -C 20 carboxylic acid/α, β-ethylenically unsaturated C 3 -C 20 carboxylic acid ester terpolymer;
b. said Component (C) is a basic metal ion salt having a cation selected from the group consisting of, Li + , Na + , K + , Zn 2+ , Ca 2+ , Co 2+ , Ni 2+ , Cu 2+ , Pb 2+ , and Mg 2+ .
3. The blend composition of claim 1 , wherein:
a. said Component (A) is:
i. a unimodal ethylene/(meth)acrylic acid copolymer or ethylene/(meth)acrylic acid/(meth)acrylate terpolymer; or
ii. a bimodal polymer blend composition comprising:
(1) a high molecular weight component having a weight average molecular weight, Mw, of about 80,000 to about 500,000 and comprising one or more ethylene/α, β-ethylenically unsaturated C 3-8 carboxylic acid copolymers and/or one or more ethylene, alkyl (meth)acrylate, (meth)acrylic acid terpolymers; said high molecular weight component being partially neutralized with metal ions selected from the group consisting of lithium, sodium, potassium, zinc, calcium, magnesium, and combinations thereof; and
(2) a low molecular weight component having a weight average molecular weight, Mw, of from about 2,000 to about 30,000 and comprising one or more ethylene/α, β-ethylenically unsaturated C 3-8 carboxylic acid copolymers and/or one or more ethylene, alkyl (meth)acrylate, (meth)acrylic acid terpolymers; said low molecular weight component being partially neutralized with metal ions selected from the group consisting of lithium, sodium, potassium, zinc, calcium, magnesium, and combinations thereof; and
b. said Component (B) is present in an amount from about 1 to about 20 phr, and is selected from the group consisting of amino acids, carbamic acid, oxamic acid, anthranillic acids, and combinations thereof; and
c. said Component (C) is a basic metal ion salt having a cation selected from the group consisting of, Li + , Na + , K + , Ca 2+ , Zn 2+ , and Mg 2+ , and combinations thereof.
4. The blend composition of claim 3 , wherein:
a. said Component (A) is a unimodal ethylene/(meth)acrylic acid copolymer or ethylene/(meth)acrylic acid/(meth)acrylate terpolymer;
b. said Component (B) is present in an amount from about 1 to about 15 phr, and is selected from the group consisting of 4,4′-methylene-bis-(cyclohexylamine)carbamate, 11-aminoundecanoicacid, 12-aminododecanoic acid, and combinations thereof; and
c. said Component (C) is selected from the group consisting of metal formates, metal acetates, metal nitrates, metal carbonates, metal bicarbonates, metal oxides, metal hydroxides, metal alkoxides, and combinations thereof.
5. An item of sports equipment comprising the blend composition of claim 1 .