Golf ball

Patent metadata

Field	Value
Publication number	US-9789364-B2
Application number	US-201514979929-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Dec 26, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An object of the present invention is to provide a golf ball showing both striking a good balance between the visibility and the weather resistance. The present invention provides a golf ball comprising a golf ball body and two or more paint film layers formed on a surface of the golf ball body, wherein the paint film layers comprises a first paint film layer containing an inorganic fluorescent agent but substantially not containing an ultraviolet absorber, and a second paint film layer containing an ultraviolet absorber but substantially not containing an inorganic fluorescent agent; and the second paint film layer is disposed inside the first paint film layer.

First claim

The invention claimed is:

1. A golf ball comprising a golf ball body and two or more paint film layers formed on a surface of the golf ball body, wherein the paint film layers comprises a first paint film layer containing an inorganic fluorescent agent but substantially not containing an ultraviolet absorber, and a second paint film layer containing an ultraviolet absorber but substantially not containing an inorganic fluorescent agent; and the second paint film layer is disposed inside the first paint film layer.

2. The golf ball according to claim 1 , wherein the first paint film layer is an outermost paint film layer.

3. The golf ball according to claim 1 , wherein the inorganic fluorescent agent is at least one selected from the group consisting of BaMgAl 10 O 17 :Eu, (SrCaBaMg) 5 (PO 4 ) 3 Cl:Eu, Zn 2 SiO 4 :Mn, BaMg 2 Al 16 O 27 :Eu, BaMg 2 Al 16 O 27 :Eu/Mn, LaPO 4 :Ce/Tb, Y 3 Al 5 O 12 :Ce, Y 2 O 2 S:Eu, Ca 10 (PO 4 ) 6 FCl:Sb/Mn, and Y 2 O 3 :Eu.

4. The golf ball according to claim 1 , wherein a content of the inorganic fluorescent agent in the first paint film layer ranges from 1 part by mass to 25 parts by mass with respect to 100 parts by mass of a base resin constituting the first paint film layer.

5. The golf ball according to claim 1 , wherein a content of the ultraviolet absorber in the second paint film layer ranges from 0.2 part by mass to 3.5 parts by mass with respect to 100 parts by mass of a base resin constituting the second paint film layer.

6. The golf ball according to claim 1 , wherein a base resin constituting the first paint film layer and the second paint film layer includes a polyurethane obtained by a reaction between a polyol component and a polyisocyanate component.

7. The golf ball according to claim 1 , wherein the inorganic fluorescent agent has a volume average particle diameter ranging from 3 μm to 10 μm.

8. The golf ball according to claim 1 , wherein a content of the inorganic fluorescent agent in the first paint film layer ranges from 3 parts by mass to 23 parts by mass with respect to 100 parts by mass of a base resin constituting the first paint film layer.

9. The golf ball according to claim 1 , wherein a content of the ultraviolet absorber in the second paint film layer ranges from 0.5 part by mass to 1.0 part by mass with respect to 100 parts by mass of a base resin constituting the second paint film layer.

10. The golf ball according to claim 1 , wherein the ultraviolet absorber is at least one selected from the group consisting of a salicylic acid derivate, a benzophenone derivate, a benzotriazole derivate, a cyanoacrylate derivate, a triazine derivate, and a nickel complex.

11. The golf ball according to claim 6 , wherein a content of an isocyanate group (NCO %) in the polyisocyanate component ranges from 0.5 mass % to 45 mass %.

12. The golf ball according to claim 6 , wherein the polyol component has a hydroxyl value ranging from 55 mg KOH/g to 100 mg KOH/g.

13. The golf ball according to claim 6 , wherein a molar ratio (NCO group/OH group) of an isocyanate group (NCO group) of the polyisocyanate component to a hydroxyl group (OH group) of the polyol component is 1.0 or more.

14. The golf ball according to claim 1 , wherein the first paint film layer has a thickness ranging from 5 μm to 15 μm.

15. The golf ball according to claim 1 , wherein the second paint film layer has a thickness ranging from 5 μm to 15 μm.

16. The golf ball according to claim 1 , wherein the paint film layers have a total thickness ranging from 10 μm to 25 μm.

17. The golf ball according to claim 1 , wherein the golf ball body comprises a core and at least one cover layer covering the core, and an outermost cover layer contains a fluorescent dye and/or a fluorescent pigment.

18. The golf ball according to claim 17 , wherein the fluorescent dye and/or the fluorescent pigment contained in the outermost cover layer develops a similar color as the inorganic fluorescent agent contained in the first paint film layer.

19. The golf ball according to claim 17 , wherein a content of the fluorescent dye and/or the fluorescent pigment in the outermost cover layer ranges from 0.5 part by mass to 3.5 parts by mass with respect to 100 parts by mass of a resin component constituting the outermost cover layer.

Assignees

• Dunlop Sports Co Ltd

Inventors

• Matsuyama Yoshiko

Classifications

• A63B37/0022 Primary

  Coatings, e.g. paint films; Markings · CPC title

• A63B45/02 Primary

  Marking of balls · CPC title

• A63B43/008

  with means for improving visibility, e.g. special markings or colours (illuminating or reflecting means A63B43/06) · CPC title

• C09D5/22

  Luminous paints {(luminescent compositions C09K11/00)} · CPC title

• A63B37/00221 Primary

  characterised by the material · CPC title