申请人:——
公开号:US20020086745A1
公开(公告)日:2002-07-04
A golf ball comprising a core and a cover, the cover having a thickness of less than about 0.08 inches, the core having a compression of less than about 90 and is formed from a composition comprising a base rubber, a metal salt acrylate or diacrylate, an initiator, a highly-neutralized polymer, and at least one of a low modulus ionomer or an acid terpolymer of the formula:
1
having a dynamic shear storage modulus at 23° C. of at least about 104 dynes/cm
2
and a loss tangent of no more than about 1 at a frequency of about 1 Hz, wherein R
1
, R
2
, and R
3
are hydrogen or CH
3
; R
4
is linear or branched alkyl of formula C
n
H
2n+1
, where n is an integer; M
+
is H
+
, Li
+
, Zn
2+
, Ca
2+
, Ti
2+
, Mg
2+
, Na
+
, W
3+
, or Zr
2+
; and x ranges from about 20 to about 85 weight percent of the polymer, y ranges from about 1 to about 50 weight percent of the polymer, and z ranges from about 1 to about 30 weight percent of the polymer; wherein the low modulus ionomer or acid terpolymer is present in an amount sufficient to improve the durability of the core.
一种高尔夫球,由球芯和外层组成,外层的厚度小于约 0.08 英寸,球芯的压缩率小于约 90,由一种组合物形成,该组合物包括基础橡胶、丙烯酸酯或二丙烯酸酯金属盐、引发剂、高中和聚合物以及低模量离子聚合物或酸式三元共聚物中的至少一种:
1
在 23 摄氏度时的动态剪切储存模量至少为约 104 达因/厘米
2
在频率约为 1 Hz 时,损耗正切不大于约 1,其中 R
1
, R
2
和 R
3
是氢或 CH
3
; R
4
是式 C 的直链或支链烷基
n
H
2n+1
其中 n 为整数;M
是 H
是 H
+
,Li
+
、Zn
2+
钙
2+
、Ti
2+
镁
2+
Na
加
, W
3+
或 Zr
2+
其中低模量离聚物或酸性三元共聚物的含量足以提高芯材的耐久性。