Solid golf ball center with block butadiene-styrene polymers

DETAILED DESCRIPTION What is claimed is: 1.
A solid golf ball center having a substantially spherical form with high rebound capabilities comprising: (a) a noncross-linked, butadiene-styrene radial block copolymer having a butadiene content in the range of about 50% to 85% by weight and a styrene content in the range of about 15% to 50% by weight; and (b) an inorganic filler material; said filler material composing the major portion by weight not exceeding 80% of said golf ball center, said center being substantially free of curing agents or initiators and said radial block copolymer having a molecular weight of at least 150,000 as measured by gel permeation chromotography.
2.
The solid golf ball center as defined in claim 1 including an extender which is a paraffinic or napthenic oil.
3.
The solid golf ball center as defined in claim 1 wherein said golf ball center has a weight in the range of about 15 grams to about 22 grams.
4.
The solid golf ball center as defined in claim 1 wherein said filler material is present in the range of about 60% to about 80% by weight of the golf ball center.
5.
The solid golf ball center as defined in claim 2 wherein said extender is present in an amount in the range of about 5% to 20% by weight of the golf ball center.
6.
The solid golf ball center as defined in claim 1 wherein said butadiene is represented by 85% by weight of isoprene.
7.
The solid golf ball center is defined in claim 4 wherein said filler material is barium sulfate.
8.
The solid golf ball center as defined in claim 1 wherein the butadiene-styrene radial block copolymer has a molecular weight of about 160,000.




Description:
BACKGROUND OF THE INVENTION This invention relates to thermoplastic polymers which are useful in molding centers for golf balls.
More particularly, it relates to the use of thermoplastic polymers composed of block radial polymers of the dienearyl substituted olefin butadiene-styrene type which contains a major portion of a filler material as well as an extender to form a golf ball center having high rebound characteristics as well as offering versatility in meeting manufacturing specifications