Golf Ball

• US 20030125135A1
• Filed: 11/12/2002
• Published: 07/03/2003
• Est. Priority Date: 11/13/2001
• Status: Abandoned Application

• Current Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Original Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Inventors: Iwami, Satoshi, Yabuki, Yoshikazu
• Application Number:
  US10/291,482
• Publication Number:
  US 20030125135A1
• Time in Patent Office: Days
• US Class Current: 473/371
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0031 Hardness
• CPC Class Codes: A63B 37/0033 Thickness
• CPC Class Codes: A63B 37/12 Special coverings , i.e. outer layer material balls with finger holes A63B37/0001, golf ball covers A63B37/0023
• CPC Class Codes: C08G 18/4277 Caprolactone and/or substituted caprolactone
• CPC Class Codes: C08G 18/44 Polycarbonates
• CPC Class Codes: C08G 18/4854 Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08G 18/758 containing two or more cycloaliphatic rings
• CPC Class Codes: C09D 175/06 from polyesters

Abstract

The present invention provides a golf ball, which is superior in rebound characteristics, scuff resistance, yellowing resistance and productivity, and has good moldability. The present invention relates to a golf ball comprising a core and a cover formed on the core, wherein the cover comprises a mixture of polyurethane-based thermoplastic elastomer formed by using cycloaliphatic diisocyanate and polyurethane-based thermoplastic elastomer formed by using aliphatic diisocyanate as a base resin.

Claims

1. A golf ball comprising a core and a cover formed on the core, wherein the cover comprises a mixture of polyurethane-based thermoplastic elastomer formed by using cycloaliphatic diisocyanate and polyurethane-based thermoplastic elastomer formed by using aliphatic diisocyanate as a base resin.

3. The golf ball according to claim 1 or claim 2, wherein the cycloaliphatic diisocyanate is at least one selected from the group consisting of 4,4′

-dicyclohexylmethane diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, isophorone diisocyanate, and trans-1,4-cyclohexane diisocyanate.

4. The golf ball according to claim 1, wherein the aliphatic diisocyanate is at least one selected from the group consisting of 1,6-hexamethylene diisocyanate (HDI), 2,2,4-(2,2,4)-trimethylene hexamethylene diisocyanate (TMDI) and lysine diisocyanate (LDI).

5. The golf ball according to claim 1, wherein the cycloaliphatic diisocyanate is 4,4′

-dicyclohexylmethane diisocyanate and the aliphatic diisocyanate is 1,6-hexamethylene diisocyanate.

6. The golf ball according to claim 1, wherein a blend ratio (a/b) of the polyurethane-based thermoplastic elastomer formed by using cycloaliphatic diisocyanate (a) to the polyurethane-based thermoplastic elastomer formed by using aliphatic diisocyanate (b) in the mixture is 95/5 to 50/50.

9. The golf ball according to claim 1 or claim 2, wherein the cover has a Shore D hardness of 35 to 55 and a thickness of 0.3 to 2.0 mm.

2. A golf ball comprising a core and a cover formed on the core, wherein the cover comprises polyurethane-based thermoplastic elastomer formed by using polyol having crystallizability and cycloaliphatic diisocyanate as a base resin.

7. The golf ball according to claim 2, wherein the polyol having crystallizability in the polyurethane-based thermoplastic elastomer has a heat of fusion of crystalline of 0.1 to 0.7 mJ/°

C.-mg, measured by DSC.

8. The golf ball according to claim 2, wherein the polyol having crystallizability is at least one selected from the group consisting of polycaprolactone diol (PCL), polycarbonate diol (PC), polyethylene adipate (PEA), polybutylene adipate (PBA) and polyhexamethylene adipate (PHMA).