Golf club grip and golf club

Patent metadata

Field	Value
Publication number	US-10792545-B2
Application number	US-201816172554-A
Country	US
Kind code	B2
Filing date	Oct 26, 2018
Priority date	Oct 27, 2017
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

An object of the present invention is to provide a golf club grip having excellent abrasion resistance and a high coefficient of friction. The present invention provides a golf club grip comprising an outermost layer, wherein at least a part of the outermost layer is formed from a rubber composition containing (A) a base rubber and (B) carbon black, (B) the carbon black has a DBP absorption amount in a range from 50 cm 3 /100 g to 140 cm 3 /100 g and a CTAB specific surface area in a range from 30 m 2 /g to 160 m 2 /g, a product (amount×DBP absorption amount) obtained by multiplying an amount (g) of (B) the carbon black in the rubber composition with respect to 100 g of (A) the base rubber by the DBP absorption amount (cm 3 /100 g) ranges from 380 to 2600, a product (amount×CTAB specific surface area) obtained by multiplying the amount (g) of (B) the carbon black in the rubber composition with respect to 100 g of (A) the base rubber by the CTAB specific surface area (m 2 /g) ranges from 425 to 3000, and the part formed from the rubber composition has tan δ(30° C., 10 Hz) in a range from 0.100 to 0.280.

First claim

The invention claimed is:

1. A golf club grip comprising an outermost, layer, wherein at least a part of the outermost layer is formed from a rubber composition containing (A) a base rubber and (B) carbon black,
(B) the carbon black has a DBP absorption amount in a range from 50 cm 3 /100 g to 140 cm 3 /100 g and a CTAB specific surface area in a range from 30 m 2 /g to 160 m 2 /g,
a product (amount×DBP absorption amount) obtained by multiplying an amount (g) of (B) the carbon black in the rubber composition with respect to 100 g of (A) the base rubber by the DBP absorption amount (cm 3 /100 g) ranges from 380 to 2600,
a product (amount×CTAB specific surface area) obtained by multiplying the amount (g) of (B) the carbon black in the rubber composition with respect to 100 g of (A) the base rubber by the CTAB specific surface area (m 2 /g) ranges from 425 to 3000, and
the part formed from the rubber composition has tan δ(30° C., 10 Hz) in a range from 0.100 to 0.280.

2. The golf club grip according to claim 1 , wherein the rubber composition has a material hardness in a range from 35 to 59 in Shore A hardness.

3. The golf club grip according to claim 1 , wherein the rubber composition contains (B) the carbon black in an amount of ranging from 3 parts by mass to 20 parts by mass with respect to 100 parts by mass of (A) the base rubber.

4. The golf club grip according to claim 1 , wherein (A) the base rubber contains at least one member selected from the group consisting of a carboxy-modified acrylonitrile-butadiene rubber, a hydrogenated acrylonitrile-butadiene rubber and a carboxy-modified hydrogenated-acrylonitrile-butadiene rubber.

5. The golf club grip according to claim 1 , wherein the rubber composition further contains a crosslinking agent in an amount ranging from 0.2 part by mass to 4.0 parts by mass with respect to 100 parts by mass of (A) the base rubber.

6. The golf club grip according to claim 5 , wherein the crosslinking agent is an elemental sulfur.

7. The golf club grip according to claim 5 , wherein the rubber composition further contains a vulcanization accelerator in an amount ranging from 0.4 part by mass to 8.0 parts by mass with respect to 100 parts by mass of (A) the base rubber, and/or a vulcanization activator in an amount ranging from 0.5 part by mass to 10.0 parts by mass with respect to 100 parts by mass of (A) the base rubber.

8. The golf club grip according to claim 1 , wherein the rubber composition essentially does not contain a reinforcing material other than (B) the carbon black.

9. The golf club grip according to claim 1 , wherein the golf club grip comprises a dual-layered cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the cylindrical inner layer,
the cylindrical outer layer is formed from the rubber composition, and
a hardness difference (H1-H2) between a material hardness H1 of the rubber composition for forming the cylindrical outer layer and a material hardness H2 of a composition for forming the cylindrical inner layer ranges from 0 to 65 in Shore A hardness.

10. A golf club comprising a shaft, a head provided on one end of the shaft, and a grip provided on another end of the shaft, wherein the grip is a golf club grip comprising an outermost layer, and
wherein at least a part of the outermost layer is formed from a rubber composition containing (A) a base rubber and (B) carbon black,
(B) the carbon black has a DBP absorption amount in a range from 50 cm 3 /100 g to 140 cm 3 /100 g and a CTAB specific surface area in a range from 30 m 2 /g to 160 m 2 /g,
a product (amount×DBP absorption amount) obtained by multiplying an amount (g) of (B) the carbon black in the rubber composition with respect to 100 g of (A) the base rubber by the DBP absorption amount (cm 3 /100 g) ranges from 380 to 2600,
a product (amount×CTAB specific surface area) obtained by multiplying the amount (g) of (B) the carbon black in the rubber composition with respect to 100 g of (A) the base rubber by the CTAB specific surface area (m 2 /g) ranges from 425 to 3000, and
the part formed from the rubber composition has tan δ(30° C., 10 Hz) in a range from 0.100 to 0.280.

11. The golf club according to claim 10 , wherein the rubber composition has a material hardness in a range from 35 to 59 in Shore A hardness.

12. The golf club according to claim 10 , wherein the rubber composition contains (B) the carbon black in an amount ranging from 3 parts by mass to 20 parts by mass with respect to 100 parts by mass of (A) the base rubber.

13. The golf club according to claim 10 , wherein (A) the base rubber contains at least one member selected from the group consisting of a carboxy-modified acrylonitrile-butadiene rubber, a hydrogenated acrylonitrile-butadiene rubber and a carboxy-modified hydrogenated acrylonitrile-butadiene rubber.

14. The golf club grip according to claim 10 , wherein the rubber composition further contains a crosslinking agent in an amount ranging from 0.2 part by mass to 4.0 parts by mass with respect to 100 parts by mass of (A) the base rubber.

15. The golf club grip according to claim 14 , wherein the crosslinking agent is an elemental sulfur.

16. The golf club grip according to claim 14 , wherein the rubber composition further contains a vulcanization accelerator in an amount ranging from 0.4 part by mass to 8.0 parts by mass with respect to 100 parts by mass of (A) the base rubber, and/or a vulcanization activator in an amount ranging from 0.5 part by mass to 10.0 parts by mass with respect to 100 parts by mass of (A) the base rubber.

17. The golf club grip according to claim 10 , wherein the rubber composition essentially does not contain a reinforcing material other than (B) the carbon black.

18. The golf club grip according to claim 10 , wherein the golf club grip comprises a dual-layered cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the cylindrical inner layer,
the cylindrical outer layer is formed from the rubber composition, and
a hardness difference (H1-H2) between a material hardness H1 of the rubber composition for forming the cylindrical outer layer and a material hardness H2 of a composition for forming the cylindrical inner layer ranges from 0 to 65 in Shore A hardness.

19. The golf club grip according to claim 1 , wherein (B) the carbon black has a CTAB specific surface area in a range from 106 m 2 /g to 160 m 2 /g.

20. The golf club according to, claim 10 , wherein (B) the carbon black has a CTAB specific surface area in a range, from 106 m 2 /g to 160 m 2 /g.

Assignees

• Sumitomo Rubber Ind

Inventors

• Goji Sho
• Shiga Kazuyoshi

Classifications

• A63B2209/00

  Characteristics of used materials · CPC title

• C08K2201/006

  Additives being defined by their surface area · CPC title

• C08K5/14

  Peroxides · CPC title

• C08K5/40

  Thiurams, {i.e. compounds containing[IMAGE cpc-sch-C08K-1011.gif] groups} · CPC title

• C08K3/22

  of metals · CPC title