Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1998-05-18
2000-09-05
Buttner, David J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525196, 525201, 473372, 473373, 473385, A63B 3712, A63B 3702
Patent
active
06114455&
ABSTRACT:
The present invention is directed to golf balls comprising at least a cover layer and a core layer, wherein at least one layer is a blend, the ionomeric component of which comprises from about 97 wt. % to about 35 wt. % of at least one high acid ionomer resin and from about 3 wt. % to <15 wt. % of at least one very low modulus ionomer (VLMI) resin. Up to about 70 wt. % of at least one standard ionomer resin may be included in the blend, if desired. The copolymer ionomers of the invention include E/X/Y copolymers where E is ethylene, X is a softening comonomer present in from 0 wt. % to about 50 wt. % of the polymer, and Y is acrylic or methacrylic acid present in from about 5 wt. % to about 35 wt. % of the polymer, wherein the acid moiety is neutralized from about 1% to about 90% to form an ionomer by at least one cation. In the ethylenic high acid copolymer ionomer, Y is present from 16.5 wt. % to about 35 wt. % in the polymer while in the ethylenic standard copolymer ionomer, Y is present from about 5 wt. % to <16.5 wt. % of the polymer. In the VLMI, the softening comonomer preferably is at least one of n-butyl (meth)acrylate, iso-butyl (meth)acrylate, ethyl (meth)acrylate or methyl (meth)acrylate, which comprises from about 15 wt. % to about 35 wt. % of the VLMI. All of these ionomers are preferably neutralized at least about 20% with lithium, sodium, potassium, magnesium, calcium, barium, lead, tin, zinc or aluminum, or a combination of these cations.
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Acushnet Company
Buttner David J.
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