Claims
- 1. A golf ball comprising:
a core formed from a composition including (i) 10 to 45 parts per hundred of a first polybutadiene, said first polybutadiene polymerized in the presence of a cobalt or nickel-based catalyst, said polybutadiene prior to curing, having a Mooney viscosity of from about 65 to about 85, and (ii) 55 to 90 parts per hundred of a second polybutadiene, said second polybutadiene polymerized in the presence of a neodymium or lanthanide series catalyst; and at least one or more cover layers disposed about said core.
- 2. The golf ball of claim 1 wherein said first polybutadiene, prior to curing, has a Mooney viscosity of from about 70 to about 83.
- 3. The golf ball of claim 1 wherein said first polybutadiene, prior to curing, has a polydispersity of from about 1.9 to about 3.9.
- 4. The golf ball of claim 3 wherein said first polybutadiene has a polydispersity of from about 2.4 to about 3.1
- 5. The golf ball of claim 4 wherein said first polybutadiene has a polydispersity of about 2.7.
- 6. The golf ball of claim 1 wherein said first polybutadiene, prior to curing, has a number average molecular weight of from about 90,000 to about 130,000.
- 7. The golf ball of claim 6 wherein said first polybutadiene has a number average molecular weight of from about 100,00 to about 120,000.
- 8. The golf ball of claim 1 wherein said first polybutadiene, prior to curing, has a weight average molecular weight of from about 250,000 to about 350,000.
- 9. The golf ball of claim 8 wherein said first polybutadiene has a weight average molecular weight of from about 290,000 to about 310,000.
- 10. The golf ball of claim 1 wherein said first polybutadiene, prior to curing, has a Z-average molecular weight of from about 600,000 to about 750,000.
- 11. The golf ball of claim 10 wherein said first polybutadiene has a Z-average molecular weight of from about 660,000 to about 700,000.
- 12. The golf ball of claim 1 wherein said first polybutadiene, prior to curing, has a peak molecular weight of from about 150,000 to about 200,000.
- 13. The golf ball of claim 12 wherein said first polybutadiene has a peak molecular weight of from about 170,000 to about 180,000.
- 14. The golf ball of claim 1 wherein said composition comprises said first polybutadiene in a proportion of about 45 parts or less per 100 parts of said first polybutadiene and of about 55 parts or more per 100 parts of said second polybutadiene.
- 15. The golf ball of claim 14 wherein said composition comprises said first polybutadiene in a proportion of about 40 parts or less per 100 parts of said first polybutadiene and said second polybutadiene.
- 16. The golf ball of claim 1 wherein said second polybutadiene exhibits a Mooney viscosity, prior to curing, of from about 35 to about 70.
- 17. The golf ball of claim 16 wherein said second polybutadiene exhibits a Mooney viscosity, prior to curing, of from about 40 to about 65.
- 18. The golf ball of claim 17 wherein said second polybutadiene exhibits a Mooney viscosity of about 45 to about 60.
- 19. The golf ball of claim 1 wherein said first polybutadiene is polymerized in the presence of a cobalt catalyst, and said second polybutadiene is polymerized in the presence of a neodymium catalyst.
- 20. A golf ball comprising:
a core formed from a composition including (i) from about 80 parts to about 120 parts by weight of elastomer components, said elastomer components including a first polybutadiene, said first polybutadiene synthesized in the presence of a cobalt or nickel catalyst, which prior to curing, exhibits a Mooney viscosity of from about 65 to about 85, and a second polybutadiene, said second polybutadiene synthesized in the presence of a neodymium or lanthanide series catalyst, and (ii) at least about 60 parts by weight of non-elastomer components; and at least one or more cover layers disposed about said core.
- 21. The golf ball of claim 20 wherein said composition includes (i) about 100 parts by weight of elastomer components and (ii) from about 60 to about 80 parts by weight of non-elastomer components.
- 22. The golf ball of claim 20 wherein said first polybutadiene, prior to curing, has a Mooney viscosity of from about 70 to about 83.
- 23. The golf ball of claim 20 wherein said first polybutadiene, prior to curing, has a polydispersity of from about 1.9 to about 3.9.
- 24. The golf ball of claim 23 wherein said first polybutadiene has a polydispersity of from about 2.4 to about 3.1.
- 25. The golf ball of claim 22 wherein said first polybutadiene has a polydispersity of about 2.7.
- 26. The golf ball of claim 20 wherein said composition comprises said first polybutadiene in a proportion of less than 50 parts per 100 parts of said first polybutadiene and said second polybutadiene.
- 27. The golf ball of claim 20 wherein said composition comprises said first polybutadiene in a proportion of about 45 parts or less per 100 parts of said first polybutadiene and said second polybutadiene.
- 28. The golf ball of claim 20 wherein said second polybutadiene exhibits a Mooney viscosity, prior to curing, of from about 35 to about 70.
- 29. The golf ball of claim 28 wherein said second polybutadiene exhibits a Mooney viscosity, prior to curing, of from about 40 to about 65.
- 30. The golf ball of claim 29 wherein said second polybutadiene exhibits a Mooney viscosity of about 45 to about 60.
- 31. The golf ball of claim 20 wherein said first polybutadiene is synthesized in the presence of a cobalt catalyst, and said second polybutadiene is synthesized in the presence of a neodymium catalyst.
- 32. A golf ball comprising:
a core formed from a composition including (i) a first polybutadiene, said first polybutadiene synthesized in the presence of a cobalt or nickel catalyst and, prior to curing of said core, having a polydispersity of from about 1.9 to about 3.9 and having a Mooney viscosity of from about 65 to about 85, and (ii) a second polybutadiene, said second polybutadiene synthesized in the presence of neodymium or a lanthanide series catalyst; and at least one or more cover layers disposed about said core.
- 33. The golf ball of claim 32 wherein said first polybutadiene, prior to curing of said core, has a number average molecular weight of from about 90,000 to about 130,000.
- 34. The golf ball of claim 32 wherein said composition comprises said first polybutadiene in a proportion of less than 50 parts per 100 parts of said first polybutadiene and said second polybutadiene.
- 35. The golf ball of claim 34 wherein said composition comprises said first polybutadiene in a proportion of about 45 parts or less per 100 parts of said first polybutadiene and said second polybutadiene.
- 36. The golf ball of claim 32 wherein said second polybutadiene exhibits a Mooney viscosity, prior to curing, of from about 40 to about 65.
- 37. The golf ball of claim 32 wherein said first polybutadiene is synthesized in the presence of a cobalt catalyst, and said second polybutadiene is synthesized in the presence of a neodymium catalyst.
- 38. A composition adapted for forming a golf ball core, said composition comprising a first polybutadiene synthesized in the presence of a cobalt or nickel catalyst, and a second polybutadiene synthesized in the presence of a neodymium or lanthanide series catalyst, said first polybutadiene having a Mooney viscosity prior to curing, of from about 65 to about 85, and said second polybutadiene having a Mooney viscosity prior to curing of from about 30 to about 65.
- 39. The composition of claim 38 wherein said first polybutadiene is synthesized in the presence of said cobalt catalyst and said second polybutadiene is synthesized in the presence of said neodymium catalyst.
- 40. A method for producing a golf ball, said method comprising:
combining a first polybutadiene having a Mooney viscosity of from about 65 to about 85 and having a polydispersity of from about 1.9 to about 3.9, with a second polybutadiene synthesized in the presence of a neodymium or lanthanide series catalyst to form a core composition; molding said core composition to form a golf ball core; and forming one or more cover layers about said golf ball core to produce said golf ball.
- 41. The golf ball produced by the method of claim 40.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation-in-part of U.S. application Ser. No. 08/819,945 filed Mar. 18, 1997; which is a continuation of U.S. application Ser. No. 08/370,224 filed Jan. 9, 1995; which is a continuation of U.S. application Ser. No. 07/893,277 filed Jun. 4, 1992; and which is a continuation-in-part of U.S. application Ser. No. 07/874,066 filed on Apr. 24, 1992.
Divisions (1)
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Number |
Date |
Country |
Parent |
09226727 |
Jan 1999 |
US |
Child |
10150471 |
May 2002 |
US |
Continuations (2)
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Number |
Date |
Country |
Parent |
08370224 |
Jan 1995 |
US |
Child |
08819945 |
Mar 1997 |
US |
Parent |
07893277 |
Jun 1992 |
US |
Child |
08370224 |
Jan 1995 |
US |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
08819945 |
Mar 1997 |
US |
Child |
09226727 |
Jan 1999 |
US |
Parent |
07874066 |
Apr 1992 |
US |
Child |
07893277 |
Jun 1992 |
US |