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Golf ball


Title: Golf ball.
Abstract: A low modulus durable coating layer for a polyurethane covered golf ball is disclosed herein. The coating includes a high equivalent weight polyester polyol wherein the high equivalent weight polyester polyol has an equivalent weight of at least 1000. ...




USPTO Applicaton #: #20100029413 - Class: 473378 (USPTO) - 02/04/10 - Class 473 
Inventors: Gary Matroni, Thomas J. Kennedy, Iii, Viktor Keller

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The Patent Description & Claims data below is from USPTO Patent Application 20100029413, Golf ball.

CROSS REFERENCES TO RELATED APPLICATIONS

The Present Application is a divisional application of U.S. patent application Ser. No. 11/853,944, filed on Sep. 12, 2007, which claims priority to U.S. Provisional Patent Application No. 60/825,556, filed on Sep. 13, 2006.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable

BACKGROUND OF THE INVENTION

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1. Field of the Invention

The present invention relates to a coating for a golf ball. More specifically, the present invention relates to a coating for a golf ball with a polyurethane cover.

2. Description of the Related Art

Current coatings do not have sufficient durability and processing capability for premium polyurethane covered golf balls. Especially reaction injection molded polyurethane covered golf balls.

Yoneyama, U.S. Pat. No. 6,210,695 for a Golf Ball Having Coated Surface Layer Of Polyurethane discloses a clear top coat used to form the outermost layer of a golf ball which comprises (A) a polyol component containing a polyurethane polyol which has been produced from a diisocyanate compound and a hydroxyl group-containing compound and which has urethane bonds in the main chain thereof and hydroxyl groups at the chain ends and has a hydroxyl value of 20 to 100 mgKOH/g when the non-volatile content is 100% by weight, a concentration of urethane group of 1 to 5 millimoles/g and a weight average molecular weight of 10,000 to 50,000, and (B) a yellowing resistant polyisocyanate as a hardener, wherein the NCO/OH equivalent ratio of isocyanate group in said component (B) to hydroxyl group in said component (A) is from 0.7/1.0 to 2.0/1.0.

Ohira, et al., U.S. Pat. No. 6,509,410 for an Aqueous Coating Composition For Golf Ball And Golf Ball Using The Same discloses an aqueous coating composition for golf ball, comprising: a water-soluble urethane polyol having a hydroxyl value of 100 to 300 mgKOH/g, obtained by reacting a polyol component and a polyisocyanate component, and a hydrophilic group-containing polyisocyanate. (2) An aqueous coating composition for golf ball, comprising: a water-soluble urethane polyol having a hydroxyl value of 100 to 300 mgKOH/g, obtained by reacting a polyol component and a polyisocyanate component, a water-dispersible urethane resin, and a hydrophilic group-containing polyisocyanate.

Fushihara, U.S. Pat. No. 6,713,588 for a Golf Ball, discloses a polyurethane clear coating film is made by curing a polyol with an isocyanate curing agent, wherein the polyol is a mixture of a polyester polyol and a polyether polyol.

U.S. Pat. No. 5,885,173 discloses an indicia for a golf ball and is hereby incorporated by reference in its entirety. U.S. Pat. No. 6,001,177 discloses painting system for painting a golf ball and is hereby incorporated by reference in its entirety. U.S. Pat. No. 5,300,325 discloses a method for finishing a golf ball and is hereby incorporated by reference in its entirety. U.S. Pat. No. 5,409,233 discloses a coating composition for a golf ball and is hereby incorporated by reference in its entirety. U.S. Pat. No. 5,494,291 discloses a coating composition for a golf ball and is hereby incorporated by reference in its entirety. U.S. Pat. No. 6,146,288 discloses a coating composition for a golf ball and is hereby incorporated by reference in its entirety. U.S. Pat. No. 6,245,386 discloses a method for finishing a golf ball and is hereby incorporated by reference in its entirety.

BRIEF

SUMMARY

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OF THE INVENTION

The present invention is a low modulus coating that utilizes a high equivalent weight polyester polyol as a modifier for a polyester polyol/polyisocyanate solvent borne coatings system. The system may contain a whitening agent such as titanium dioxide. Due to the lower reactivity of the linear, high equivalent weight polyol, more catalyst (dibutyl tin dilaurate) is required to cure the coating in a reasonable processing timeframe.

The linear, high equivalent weight (low hydroxyl %) polyol is used in conjunction with lower equivalent weight (high hydroxyl %) polyester polyols. This polyol system is then crosslinked with a polyisocyanate material (polymeric isocyanate, prepolymer isocyanate) to form a tough, durable coating that has excellent adhesion to the golf ball cover.

Having briefly described the present invention, the above and further objects, features and advantages thereof will be recognized by those skilled in the pertinent art from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 shows a cross-sectional view of a multiple-layer golf ball.

FIG. 2 shows a cross-sectional view of a two-piece golf ball.

DETAILED DESCRIPTION

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OF THE INVENTION

A coating for a golf ball is disclosed herein. The coating is preferably used on a polyurethane covered golf ball, and more preferably a reaction injection molded polyurethane covered golf ball. The coating preferably includes a high equivalent weight polyester polyol which makes it more abrasion resistant. A preferred high equivalent weight polyester polyol is DESMOPHEN 1652A solvent-free linear saturated polyester polyol which is available from BAYER MATERIAL. The coating may also include other polyester polyols such as DESMOPHEN 670A 80 a saturated polyester polyol and DESMOPHEN 631A 75, which is another saturated polyester polyol, both available from BAYER MATERIAL. The preferred high equivalent weight polyester polyol, DESMOPHEN 1652A solvent-free linear saturated polyester polyol, has an equivalent weight of 1002. Other additives used in the coating include BYK-354 polyacrylate additive for inks available from BYK-Chemie, and SANDOVAR additive, TINUVIN 292 UV absorber, FINNTITIAN RDI titanium dioxide, T-12 additive, methyl isobutyl ketone (“MIEK”), methyl amyl ketone (“MAK”) and n-butyl acetate.

A preferred isocyanate compound is DESMODUR N-3200 aliphatic polyisocyanate available from BAYER MATERIAL, which is a hexamethylene diisocyanate; hexamethylene diisocyanate biuret, having a nitrogen-carbon-oxygen group content of approximately 23%.

One formulation has 10 parts DESMOPHEN 631A 75, 10 parts DESMOPHEN670A 80, 20 parts DESMOPHEN 1652A, 0.06 parts DABCOT-12, 0.7 parts white pigment and 196.8 parts DESMODUR 3200.

TABLE ONE Part A Weight (gms) Grind Desmophen 670A-80 111.03 n-Butyl Acetate 20.76 Methyl Amyl Ketone 30.75 Finntitan RDI 236.84 399.38

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stats Patent Info
Application #
US 20100029413 A1
Publish Date
02/04/2010
Document #
12363938
File Date
02/02/2009
USPTO Class
473378
Other USPTO Classes
473607
International Class
63B37/12
Drawings
2


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Games Using Tangible Projectile   Golf   Ball   Particular Cover (e.g., Size, Material, Dimple Pattern, Etc.)