IP Library › Granted Patent US 7,004,855
Granted Patent B2
US 7,004,855 · App. 10/696,475 · Granted Feb 28, 2006

Golf ball with vapor barrier layer

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Quick Facts
Patent No.
US 7,004,855
App. No.
10/696,475
Filed
Oct 29, 2003
Granted
Feb 28, 2006
Kind
B2
Art Unit
3711
USPC
473/374
Abstract

A multi-layer golf ball comprising a core, a water vapor barrier layer and a cover is provided. The core may have any construction and may have multiple layers. The core may also have a solid or liquid center or wound layers, and may be constructed from a polybutadiene with mid to high Mooney viscosity. The water vapor barrier layer preferably comprises a terpolymer of ethylene, a softening acrylate class ester and methacrylic acid. th. Preferably, the water vapor barrier layer has an acid content of about 3% by weight to about 25% by weight.

Claims (9)

1. A golf ball comprising a core, a water vapor barrier layer and a cover, wherein the water vapor barrier layer has a moisture vapor transmission rate that is lower than that of the cover and the water vapor barrier layer comprises a non-ionomeric terpolymer of ethylene, a softening acrylate class ester such as methyl acrylate, n-butyl-acrylate or iso-butyl-acrylate, and a carboxylic acid such as acrylic acid or methacrylic acid.

2. The golf ball set forth in claim 1 , wherein the terpolymer is a terpolymer of ethylene, methyl acrylate and acrylic acid.

3. The golf ball as set forth in claim 1 , wherein the acid level by weight in the terpolymer is in the range of about 3% to about 25%.

4. The golf ball as set forth in claim 3 , wherein the acid level by weight in the terpolymer is in the range of about 4% to about 15%.

5. The golf ball as set forth in claim 4 , wherein the acid level by weight in the terpolymer is in the range of about 7% to about 11%.

6. The golf ball set forth in claim 1 , wherein the terpolymer has a melt flow index in the range between about 1 gram/10 minutes to about 500 grams/10 minutes.

7. The golf ball set forth in claim 6 , wherein the melt flow index of the terpolymer is in the range of about 5 grams/10 minutes to about 20 grams/10 minutes.

8. A golf ball comprising a core, a water vapor barrier layer and a cover, wherein the water vapor barrier layer has a moisture vapor transmission rate that is lower than that of the cover and the water vapor barrier layer comprises a blend of a terpolymer of ethylene, a softening acrylate class ester, and a carboxylic acid having a melt flow index in the range of about 5–20 g/10 mm and a non-ionomeric copolymer of ethylene and methacrylic acid.

9. The golf ball as set forth in claim 8 , wherein the terpolymer is present in an amount of about 25%, 50% or 75% and the non-ionomeric copolymer is present in an amount of about 75%, 50% or 25%.