公开(公告)号：US10005855B2

公开(公告)日：2018-06-26

申请号：US14711482

申请日：2015-05-13

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro Shigemitsu

IPC: C08K5/098 ,  A63B37/00 ,  C08F20/06 ,  C08K5/14 ,  C08K5/375

CPC classification number: C08F20/06 ,  A63B37/0003 ,  A63B37/0037 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0048 ,  A63B37/0049 ,  A63B37/0062 ,  A63B37/0065 ,  A63B37/0075 ,  C08K5/098 ,  C08K5/14 ,  C08K5/375 ,  C08L9/00 ,  C08L23/0876

Abstract: An object of the present invention is to provide a golf ball resin composition that comprises an ionomer resin with an excellent resilience and fluidity. Another object of the present invention is to provide a golf ball excellent in the resilience without lowering the durability significantly in a golf ball using the ionomer resin for the intermediate layer. The present invention provides a golf ball resin composition comprising, 100 parts by mass of (A) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer composed of ethylene, α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and α,β-unsaturated carboxylic acid ester, and from 25 parts to 100 parts by mass of (B) a metal salt of a fatty acid having 18 to 30 carbon atoms. The golf ball of the present invention is not limited, as long as it comprises a constituent member formed from the golf ball resin composition of the present invention.

公开(公告)号：US09687697B2

公开(公告)日：2017-06-27

申请号：US14314460

申请日：2014-06-25

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takahiro Shigemitsu

IPC: A63B37/00 ,  A63B45/00

CPC classification number: A63B37/0076 ,  A63B37/0038 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0051 ,  A63B37/0059 ,  A63B37/0062 ,  A63B37/0064 ,  A63B37/0092 ,  A63B45/00

Abstract: Provided is a golf ball showing a low spin rate on driver shots and a high spin rate on approach shots. Also provided is a multi-piece golf ball comprising a center and n (n is a natural number of 3 or more) envelope layers covering the center, wherein material hardness of the envelope layers satisfies H2

公开(公告)号：US20160184656A1

公开(公告)日：2016-06-30

申请号：US14979079

申请日：2015-12-22

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro Shigemitsu ,  Hidetaka Inoue ,  Seiji Hayase

IPC: A63B37/00

CPC classification number: A63B37/0092 ,  A63B37/0031 ,  A63B37/0035 ,  A63B37/0043 ,  A63B37/0047 ,  A63B37/0062 ,  A63B37/0066 ,  A63B37/0069 ,  A63B37/0076

Abstract: An object of the present invention is to provide a golf ball showing a small ratio of a spin rate on driver shots to a spin rate on approach shots. The present invention provides a multi-piece golf ball comprising a spherical center, three or more envelope layers covering the spherical center, and a cover covering the envelope layers, wherein adjacent two envelope layers are formed so as to include a region composed of elements having a hitting deformation ratio of 30% or more, the hitting deformation ratio being obtained by analyzing a specified golf ball model by a finite element method; and the envelope layer which is radially outwardly positioned of the adjacent two envelope layers has a lowest hardness among all the envelope layers.

Abstract translation: 本发明的目的是提供一种高尔夫球，其显示驾驶员镜头上的旋转速率与接近镜头上的旋转速率的小比率。 本发明提供一种多片高尔夫球，其包括球面中心，三个或更多个覆盖球面中心的包络层，以及覆盖包封层的盖，其中相邻的两个包络层形成为包括由具有 打击变形率为30％以上，通过有限元法分析规定的高尔夫球模型获得的打击变形率; 并且相邻的两个包层的径向向外定位的包层具有在所有包层中的最低硬度。

公开(公告)号：US09346898B2

公开(公告)日：2016-05-24

申请号：US13727862

申请日：2012-12-27

Applicant: Dunlop Sports Co. Ltd.

Inventor： Kazuyoshi Shiga ,  Ryo Murakami ,  Takahiro Shigemitsu

IPC: C08K5/098 ,  A63B37/00 ,  C08F20/04 ,  C08L23/08

CPC classification number: C08F20/04 ,  A63B37/0051 ,  A63B37/0054 ,  A63B37/0059 ,  A63B37/006 ,  A63B37/0073 ,  C08K5/098 ,  C08L23/0876 ,  C08L2205/025 ,  C08L2205/035

Abstract: An object of the present invention is to provide a golf ball resin composition excellent in shot feeling and resilience. The golf ball resin composition includes (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of the binary copolymer components, (a-3) a ternary copolymer composed of the binary copolymer components and an α,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of the ternary copolymer components; and (B) a basic metal salt of a fatty acid, and having a storage modulus E′ (Pa) and a loss modulus E″ (Pa) satisfying a following expression; log(E′/E″2)≧−5.84 when measured in a tensile mode using a dynamic viscoelasticity measuring apparatus.

Abstract translation: 本发明的目的在于提供一种拍摄感和弹性优异的高尔夫球树脂组合物。 高岭球树脂组合物包含（A）至少一种选自（a-1）由烯烃和碳原子数3〜8的α，β-不饱和羧酸组成的二元共聚物的树脂成分（ a-2）由二元共聚物组分的金属离子中和产物（a-3）组成的离聚物树脂，由二元共聚物组分和α，β-不饱和羧酸酯组成的三元共聚物和（a- -4）由三元共聚物组分的金属离子中和产物组成的离聚物树脂; 和（B）脂肪酸的碱性金属盐，并且具有满足下式的储能模量E'（Pa）和损耗模量E“（Pa） log（E'/ E“2）≧-5.84当使用动态粘弹性测量装置在拉伸模式下测量时。

公开(公告)号：US08598278B2

公开(公告)日：2013-12-03

申请号：US13686083

申请日：2012-11-27

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takahiro Shigemitsu ,  Sakoto Okabe

IPC: A63B37/00 ,  C08L33/02

CPC classification number: A63B37/0039 ,  A63B37/0023 ,  A63B37/0033 ,  A63B37/0038 ,  A63B37/0043 ,  A63B37/0045 ,  A63B45/00 ,  C08L23/0876 ,  C08L2205/02 ,  C08L2666/06

Abstract: An object of the present invention is to provide a resin composition for the golf ball that suppresses the bleed out of the low molecular weight material component, as well as improves the fluidity and repulsion performance. The present invention provides a golf ball forming resin composition comprising as a resin component, (A) a high melt viscosity resin; (B) a low melt viscosity ionomer resin having a melt viscosity (190° C.) ranging from 1 Pa·s to 10 Pa·s measured by a brookfield viscometer, in a ratio of (A) the high melt viscosity resin/(B) the low melt viscosity ionomer resin being 55 mass % to 99 mass %/45 mass % to 1 mass %; and (C) a metal ion source capable of neutralizing carboxyl groups of (A) the high melt viscosity resin and (B) the low melt viscosity ionomer resin, in an amount of from 0.1 part to 10 parts with respect to 100 parts by mass of a sum of (A) the high melt viscosity resin and (B) the low melt viscosity ionomer resin.

公开(公告)号：US10195488B2

公开(公告)日：2019-02-05

申请号：US15179233

申请日：2016-06-10

Applicant: Dunlop Sports Co. Ltd.

Inventor： Kazuyoshi Shiga ,  Hiroshi Tadaoka ,  Masanori Taguchi ,  Takahiro Shigemitsu

IPC: A63B37/04 ,  A63B37/06 ,  A63B37/00 ,  C08K5/09 ,  C08K5/19 ,  C08K3/22 ,  C08K3/04 ,  C08K5/098 ,  C08K5/20

Abstract: An object of the present invention is to provide a golf ball resin composition having a high resilience, flexibility and high fluidity. The present invention provides a golf ball resin composition having a bending stiffness (M21-30) ranging from 600 kgf/cm2 to 5,000 kgf/cm2 within a bending angle from 21° to 30°, a rebound resilience (R) of 50% or more, a slab hardness (Shore D) ranging from 40 to 65, a melt flow rate (190° C., 2.16 kgf) of 1.0 g/10 min or more, and a resilience index value ((M21-30)0.5×(R/100)3) of 8.5 or more.

公开(公告)号：US10143894B2

公开(公告)日：2018-12-04

申请号：US15620000

申请日：2017-06-12

Applicant: Dunlop Sports Co. Ltd.

Inventor： Hikaru Nagakura ,  Kazuyoshi Shiga ,  Chiemi Mikura ,  Takahiro Shigemitsu

IPC: A63B37/04 ,  A63B37/06 ,  A63B37/00 ,  C08L21/00

Abstract: An object of the present invention is to provide a golf ball having excellent flying performance on driver shots. The present invention provides a golf ball having a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing: (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, (d) an unsaturated fatty acid and/or a metal salt thereof (excluding an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof), and (e) a saturated fatty acid and/or a metal salt thereof, provided that the rubber composition further contains (f) a metal compound in the case of containing only (b) the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent.

公开(公告)号：US09873023B2

公开(公告)日：2018-01-23

申请号：US15223591

申请日：2016-07-29

Applicant: Dunlop Sports Co. Ltd.

Inventor： Ryota Sakamine ,  Hikaru Nagakura ,  Kazuyoshi Shiga ,  Takahiro Shigemitsu

IPC: A63B37/02 ,  A63B37/00 ,  A63B37/04 ,  A63B37/06

CPC classification number: A63B37/0061 ,  A63B37/0051 ,  A63B37/006 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0065 ,  A63B37/0074 ,  A63B37/02 ,  A63B37/04 ,  A63B37/06

Abstract: An object of the present invention is to provide a golf ball having an excellent initial velocity when being hit at a head speed of 50 m/sec and an improved initial velocity when being hit at a head speed of 40 m/sec. The present invention provides a golf ball comprising a spherical core and at least one cover covering the spherical core, wherein the spherical core is formed from a core rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator and (x) a crosslinked rubber powder, and (x) the crosslinked rubber powder is formed from a rubber composition containing (a1) a base rubber, (b1) a co-crosslinking agent, (c1) a crosslinking initiator and (r) a resin component.

公开(公告)号：US20160184641A1

公开(公告)日：2016-06-30

申请号：US14981442

申请日：2015-12-28

Applicant: Dunlop Sports Co., Ltd.

Inventor： Kazuyoshi Shiga ,  Hiroshi Tadaoka ,  Masanori Taguchi ,  Takahiro Shigemitsu

IPC: A63B37/00 ,  C08K5/09

CPC classification number: A63B37/0003 ,  A63B37/0038 ,  C08K3/22 ,  C08K5/09 ,  C08K2003/2224 ,  C08L23/0876 ,  C08L23/0869 ,  C08K5/19 ,  C08K5/175

Abstract: An object of the present invention is to provide a golf ball resin composition excellent in resilience. Another object of the present invention is to provide a golf ball excellent in rebound resilience and shot feeling. The present invention provides a golf ball resin composition comprising: (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer, (a-2) a binary ionomer resin, (a-3) a ternary copolymer, and (a-4) a ternary ionomer resin, (B) a saturated fatty acid, and (C) an unsaturated fatty acid, wherein a total content of (B) the saturated fatty acid and (C) the unsaturated fatty acid ranges from 100 parts by mass to 200 parts by mass with respect to 100 parts by mass of (A) the resin component.

Abstract translation: 本发明的目的是提供一种弹性优异的高尔夫球树脂组合物。 本发明的另一个目的是提供一种回弹性和射击感优异的高尔夫球。 本发明提供一种高尔夫球树脂组合物，其包含：（A）至少一种选自（a-1）二元共聚物，（a-2）二元离聚物树脂，（a-3）a 三元共聚物和（a-4）三元离聚物树脂，（B）饱和脂肪酸和（C）不饱和脂肪酸，其中（B）饱和脂肪酸和（C）不饱和脂肪酸的总含量 相对于（A）树脂成分100质量份，酸的范围为100质量份〜200质量份。

公开(公告)号：US09353199B2

公开(公告)日：2016-05-31

申请号：US13728644

申请日：2012-12-27

Applicant: DUNLOP SPORTS CO., LTD.

Inventor： Kazuyoshi Shiga ,  Ryo Murakami ,  Takahiro Shigemitsu

IPC: C08K5/098 ,  A63B37/00 ,  C08F22/02

CPC classification number: C08F22/02 ,  A63B37/0051 ,  A63B37/0054 ,  A63B37/0059 ,  A63B37/006 ,  A63B37/0073 ,  C08K5/098

Abstract: An object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The present invention provides a golf ball resin composition comprising (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of the binary copolymer, (a-3) a ternary copolymer composed of the binary copolymer components and an α,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of the ternary copolymer components; and (B) a basic metal salt of a fatty acid, and having a spin-lattice relaxation time (T1) of 13C nucleus of 5.56 seconds or shorter measured by a High resolution solid state nuclear magnetic resonance (NMR) method.

Abstract translation: 本发明的目的在于提供一种射击感和弹性优异的高尔夫球。 本发明提供一种高尔夫球树脂组合物，其包含（A）至少一种选自（a-1）由烯烃组成的二元共聚物和具有3至8个碳原子的α，β-不饱和羧酸的树脂组分 碳原子，（a-2）由二元共聚物的金属离子中和产物组成的离聚物树脂，（a-3）由二元共聚物组分和α，β-不饱和羧酸酯组成的三元共聚物， 和（a-4）由三元共聚物组分的金属离子中和产物组成的离聚物树脂; 和（B）脂肪酸的碱金属盐，通过高分辨率固态核磁共振（NMR）法测定的具有5.56秒或更短的13C核的自旋晶格弛豫时间（T1）为5.56秒或更短。