公开(公告)号：US20180093138A1

公开(公告)日：2018-04-05

申请号：US15699748

申请日：2017-09-08

Applicant: Dunlop Sports Co., Ltd.

Inventor： Toshiyuki TARAO ,  Mami TANAKA

IPC: A63B37/00

CPC classification number: A63B37/0051 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0074 ,  A63B37/008 ,  A63B37/0087 ,  C08G83/007 ,  C08L9/00

Abstract: An object of the present invention is to provide a golf ball excellent in durability. The present invention provides a golf ball comprising a constituent member containing a crosslinked rubber component and a polyrotaxane component, wherein the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via —O—C3H6—O— group.

公开(公告)号：US20180178080A1

公开(公告)日：2018-06-28

申请号：US15854092

申请日：2017-12-26

Applicant: Dunlop Sports Co. Ltd.

Inventor： Mami TANAKA ,  Toshiyuki TARAO

IPC: A63B37/00

CPC classification number: A63B37/0074 ,  A63B37/0024 ,  A63B37/0031 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0062 ,  A63B37/0065 ,  A63B37/0067 ,  A63B37/0075 ,  A63B37/0083 ,  A63B37/0092 ,  C08L23/0876

Abstract: An object of the present invention is to provide a golf ball having excellent shot feeling and resilience as well as improved durability and abrasion resistance. The present invention provides a golf ball comprising a spherical core and one or more cover layers disposed outside the spherical core, wherein at least one layer of the cover layers contains: (A) a base resin containing (a-1) an ionomer resin and having a material hardness of 58 or less in Shore D hardness; and (B) a polyrotaxane having a cyclodextrin with at least a part of hydroxyl groups thereof being modified with a caprolactone chain via —O—C3H6—O— group, a linear molecule piercing through a cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin.

公开(公告)号：US20170173401A1

公开(公告)日：2017-06-22

申请号：US15343889

申请日：2016-11-04

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kazuya KAMINO ,  Kosuke TACHIBANA ,  Toshiyuki TARAO ,  Mami TANAKA

IPC: A63B37/00

CPC classification number: A63B37/0076 ,  A63B37/0024 ,  A63B37/0027 ,  A63B37/0037 ,  A63B37/004 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/006 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0064 ,  A63B37/0096 ,  C08G83/007 ,  C08L75/04 ,  C08L5/16

Abstract: A golf ball 2 includes an inner core 4, an outer core 6, a mid layer 8, and a cover 10. A diameter D1, a volume V1, a hardness H1o at a central point, and a boundary inside hardness H1in of the inner core 4; a volume V2, a boundary outside hardness H2out, and a surface hardness H2s of the outer core 6; a thickness Tm and a hardness Hm of the mid layer 8; and a thickness Tc and a hardness Hc of the cover 10 meet the following mathematical formulas (1) to (4): 1.0

公开(公告)号：US20180036599A1

公开(公告)日：2018-02-08

申请号：US15645144

申请日：2017-07-10

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hidetaka INOUE ,  Kazuya KAMINO ,  Kohei MIMURA ,  Toshiyuki TARAO ,  Mami TANAKA

IPC: A63B37/00

CPC classification number: A63B37/0012 ,  A63B37/0003 ,  A63B37/0006 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021 ,  A63B37/0022 ,  A63B37/0038

Abstract: A golf ball 2 includes a main body 4 and a paint film 6. The paint film 6 includes an inner layer 14 and an outer layer 16. A modulus Min of the inner layer 14 is higher than a modulus Mout of the outer layer 16. A difference (Min−Mout) is not less than 25 kgf/cm2. The golf ball 2 has a plurality of dimples 18. A ratio So of a sum of areas of the dimples 18 relative to a surface area of a phantom sphere of the golf ball 2 and a ratio Rs of a number of the dimples 18 each having a diameter of not less than 9.60% and not greater than 10.37% of a diameter of the golf ball 2, relative to a total number of the dimples 18, satisfy the following mathematical formula (1). Rs≧−2.5*So+273   (1)

公开(公告)号：US20180178074A1

公开(公告)日：2018-06-28

申请号：US15842263

申请日：2017-12-14

Applicant: Dunlop Sports Co. Ltd.

Inventor： Toshiyuki TARAO ,  Kazuya KAMINO ,  Mami TANAKA ,  Hidetaka INOUE

IPC: A63B37/00

CPC classification number: A63B37/0022 ,  A63B37/0031 ,  A63B37/0043 ,  A63B37/0073 ,  A63B37/0074 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0092 ,  A63B37/0096

Abstract: An object of the present invention is to provide a golf ball having good spin performance on approach shots and good shot feeling as well as excellent stain resistance by precisely controlling physical properties of a paint film actually formed on a surface of a golf ball body. The present invention provides a golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein the paint film is such that a linear approximation curve obtained by a least square method has a slope in an absolute value ranging from 0.0001 to 0.0020 when a loss tangent tan δ thereof measured by a nanoindentation method is plotted as a vertical axis against a measuring frequency (Hz) as a horizontal axis, and that an elastic modulus thereof measured by a nanoindentation method ranges from 0.040 GPa to 0.600 GPa.

公开(公告)号：US20170340923A1

公开(公告)日：2017-11-30

申请号：US15592861

申请日：2017-05-11

Applicant: Dunlop Sports Co. Ltd.

Inventor： Mami TANAKA ,  Toshiyuki TARAO

IPC: A63B37/00

CPC classification number: A63B37/0024 ,  A63B37/0023 ,  A63B37/0029 ,  A63B37/0031 ,  A63B37/0037 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0074 ,  A63B37/0092 ,  C08G18/3206 ,  C08G18/4009 ,  C08G18/4808 ,  C08G18/4854 ,  C08G18/6484 ,  C08G18/6674 ,  C08G18/758 ,  C08G18/7671 ,  C08G83/007 ,  C08L75/00

Abstract: An object of the present invention is to provide a golf ball having excellent abrasion resistance and spin performance on driver shots. The present invention provides a golf ball having a spherical core and a cover covering the spherical core, wherein the cover contains a polyurethane, wherein the polyurethane comprises, as a constituent component, (A) a polyisocyanate component and (B) a polyol component containing (b1) a polyrotaxane, and wherein (b1) the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and a blocking group located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via —O—C3H6—O— group.

公开(公告)号：US20180178081A1

公开(公告)日：2018-06-28

申请号：US15854122

申请日：2017-12-26

Applicant: Dunlop Sports Co. Ltd.

Inventor： Mami TANAKA ,  Toshiyuki TARAO

IPC: A63B37/00

CPC classification number: A63B37/0074 ,  A63B37/0024 ,  A63B37/0031 ,  A63B37/0043 ,  A63B37/0062 ,  A63B37/0065 ,  A63B37/0067 ,  A63B37/0075 ,  A63B37/0083 ,  A63B37/0092 ,  C08L23/0876

Abstract: An object of the present invention is to provide a golf ball exhibiting good shot feeling and excellent resilience. The present invention provides a golf ball comprising a spherical core and one or more cover layers disposed outside the spherical core, wherein at least one layer of the cover layers contains: (A) a base resin containing (a-1) an ionomer resin and having a material hardness of 59 or more in Shore D hardness; and (B) a polyrotaxane having a cyclodextrin with at least a part of hydroxyl groups of the cyclodextrin being modified with a caprolactone chain via —O—C3H6—O— group, a linear molecule piercing through a cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin.

公开(公告)号：US20170165530A1

公开(公告)日：2017-06-15

申请号：US15347459

申请日：2016-11-09

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kosuke TACHIBANA ,  Kazuya KAMINO ,  Toshiyuki TARAO ,  Mami TANAKA

IPC: A63B37/00 ,  A63B45/00

CPC classification number: A63B37/0096 ,  A63B37/0024 ,  A63B37/0029 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0037 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0063 ,  A63B37/0067 ,  A63B37/0075 ,  A63B37/008 ,  A63B37/0083 ,  A63B37/0087 ,  A63B37/0092 ,  A63B45/00 ,  A63B2037/0079 ,  C08B37/0015 ,  C08G83/007 ,  C08L75/04 ,  C09D175/04 ,  C08L5/16

Abstract: A golf ball 2 includes a core 4, a mid layer 6, and a cover 8. A difference DH in hardness between a surface and a central point of the core 4, a thickness Tm and a hardness Hm of the mid layer 6, a thickness Tc and a hardness Hc of the cover 8, and an amount of compressive deformation Sb of the golf ball 2 meet the following mathematical formulas (DH*Hm)/(Hc*Tc)>80 and ((Sb*Tc)/(Hc*Hm*Tm))*1000>0.75. A hardness Hc of the cover 8 is equal to or less than 40. A material of the cover 8 is a resin composition. The resin composition includes a polyurethane (A) and a polyrotaxane (B).

公开(公告)号：US20170121524A1

公开(公告)日：2017-05-04

申请号：US15337825

申请日：2016-10-28

Applicant: Dunlop Sports Co. Ltd.

Inventor： Mami TANAKA ,  Toshiyuki TARAO

IPC: C08L75/04 ,  C08L9/00 ,  C08L33/02 ,  A63B37/00

CPC classification number: C08L75/04 ,  A63B37/0023 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0037 ,  A63B37/005 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0074 ,  C08G83/007 ,  C08L5/16 ,  C08L9/00 ,  C08L33/02 ,  C08L2205/02 ,  C08L2207/04 ,  C08L71/00 ,  C08L101/00

Abstract: An object of the present invention is to provide a golf ball having an excellent spin performance on approach shots under a wet condition. The present invention provides a golf ball comprising a spherical core and a cover covering the spherical core, wherein the cover is formed from a cover composition containing (A) a polyurethane and (B) a polyrotaxane as a resin component, and wherein (B) the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via —O—C3H6—O— group.

公开(公告)号：US20160287944A1

公开(公告)日：2016-10-06

申请号：US15067731

申请日：2016-03-11

Applicant: DUNLOP SPORTS CO., LTD.

Inventor： Hidetaka INOUE ,  Toshiyuki TARAO ,  Mami TANAKA

IPC: A63B37/00 ,  C08L77/02 ,  C08L23/08

CPC classification number: A63B37/0039 ,  A63B37/0024 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0037 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0049 ,  A63B37/0051 ,  A63B37/0062 ,  A63B37/0069 ,  A63B37/0075 ,  A63B37/0092 ,  C08K3/22 ,  C08K3/30 ,  C08K5/098 ,  C08K5/37 ,  C08K5/375 ,  C08K2003/2296 ,  C08K2003/3045 ,  C08L77/02 ,  C08L2205/025 ,  C08L2205/03 ,  C08L2205/035 ,  C08L9/06 ,  C08L23/0846 ,  C08L23/0876 ,  C08L9/00 ,  C08L53/02 ,  C08L67/025

Abstract: An object of the present invention is to provide a material for obtaining a golf ball having excellent shot feeling and flight distance. The present invention provides a golf ball resin composition having a ratio (flexural elastic modulus/slab hardness) of a flexural elastic modulus (MPa) to a slab hardness (Shore D hardness) in a range from 3 to 5, and containing, as a resin component, (A) a polyamide resin, (B) at least one selected from the group consisting of (b-1) a binary copolymer, (b-2) a metal ion-neutralized product of a binary copolymer, (b-3) a ternary copolymer and (b-4) a metal ion-neutralized product of a ternary copolymer, and (C) a thermoplastic elastomer.

Abstract translation: 本发明的目的是提供一种用于获得具有优异的拍摄感觉和飞行距离的高尔夫球的材料。 本发明提供一种高尔夫球用树脂组合物，其具有挠曲弹性模量（MPa）与板坯硬度（肖氏D硬度）的比率（弯曲弹性模量/板坯硬度）在3〜5的范围内，并且含有 树脂成分，（A）聚酰胺树脂，（B）选自（b-1）二元共聚物，（b-2）二元共聚物的金属离子中和物中的至少一种，（b- 3）三元共聚物和（b-4）三元共聚物的金属离子中和产物，和（C）热塑性弹性体。