Sumitomo Rubber Industries Limited

Dunlop Sports Company Limited

Sri Sports Limited

Shinto Paint Co., Ltd.

Sumitomo Seika Chemicals Co., Ltd.

Dunlap Sports Co. Ltd.

Kuniyasu Horiuchi

Toshiyuki Tarao

Hidetaka Inoue

Kazuya Kamino

Kiyoto Maruoka

Yoshikazu Yabuki

Akira Kato

Akihiko Hamada

Kazuyoshi Shiga

Keiji Moriyama

Seiichiro Endo

Hiroshi Hasegawa

Chiemi Mikura

Hitoshi Oyama

Sho Goji

Hirokazu Okamoto

Kuniyuki Nishikawa

Masahiko Shiraishi

Masatoshi Yokota

Hidenori Hiraoka

Yosuke Yamamoto

Yoshinobu Nakamura

Kazuhiko Isogawa

Yoshinori Sano

Kazushige Sugimoto

Hironori Takihara

Tadahiro Ebisuno

Yoshimasa Koizumi

Kazumi Kodama

Naoki Kato

Keiichi Hattori

Kotaro Ryuo

Satoshi Iwami

Takashi Sasaki

Kazuhisa Fushihara

Mikio Yamada

Jun Takagi

Michio Suzuki

Atsuko Ochi

Satoshi Mano

Kaichiro Wayaku

Masao Nakamura

Manabu Tomosada

Norio Yoshiga

Yoshinobu Makamura

Masatoshi Takahashi

Kazuhiro Tanaka

An object of the present invention is to provide a golf ball having excellent spin performance on approach shots under a wet condition and excellent spin performance on approach shots under a condition that there is grass between the golf ball and the club face. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body, wherein an outermost layer of the paint film located at the outermost layer of the golf ball contains a base resin and a porous filler, the base resin contains a polyurethane obtained by a reaction between a polyisocyanate composition and a polyol composition, and the porous filler contains SiOin an amount of 50 mass % or more as a constituent component.

Golf ball

An object of the present invention is to provide a golf ball having excellent spin performance on approach shots under a wet condition and excellent spin performance on approach shots under a condition that there is grass between the golf ball and the dub face. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body, wherein an outermost layer of the paint film located at the outermost layer of the golf ball contains a base resin and a porous filler, the base resin contains a polyurethane obtained by a reaction between (A) a polyisocyanate composition and (B) a polyol composition containing a urethane polyol as a polyol component, the porous filler contains SiOin an amount of 50 mass % or more as a constituent component, and a loss tangent (tan δ) of the outermost layer of the paint film measured with a dynamic viscoelasticity measuring apparatus under following conditions has a peak temperature in a range of from −43° C. to 40° C.

An object of the present invention is to provide a golf ball having improved ball speed or aerodynamic performance on a rainy day or the like by controlling the formulation of the paint film. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein a paint film surface of the golf ball has a water contact angle A1 of 70&#xb0; or more and a water sliding angle B1 of less than 50&#xb0;. The present invention also provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein when a sheet consisting of a slab formed from a composition constituting a golf ball body surface and a coating film formed by applying a paint constituting the paint film on the slab is prepared, a coating film surface of the sheet has a water contact angle A2 of 90&#xb0; or more and a water sliding angle B2 of less than 52&#xb0;.

An object of the present invention is to provide a golf ball travelling a great flight distance on driver shots on a rainy day or the like and having excellent spin performance on approach shots. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body and composed of at least one layer, wherein an outermost layer of the paint film is formed from a paint containing a curable silicone resin, a curing catalyst, and a reactive silicone oil.

An object of the present invention is to provide a golf ball travelling a great flight distance on driver shots on a rainy day and having excellent spin performance on approach shots. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body and composed of at least one layer, wherein an outermost layer of the paint film is formed from a paint containing a polyol, a polyisocyanate, and a carbinol modified silicone oil different from the polyol compound.

An object of the present invention is to provide a golf ball having improved spin performance on wedge shots under a wet condition such as rain by controlling the formulation of the paint film. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein the paint film contains a base resin and a porous filler, and the porous filler contains SiOas a constituent in an amount of 50 mass % or more.

An object of the present invention is to provide a golf ball having excellent spin performance on approach shots under a wet condition and excellent spin performance on approach shots under a condition that there is grass between the golf ball and the club face. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body, wherein an outermost layer of the paint film located at the outermost layer of the golf ball contains a base resin and a porous filer, the base resin contains a polyurethane obtained by a reaction between (A) a polyisocyanate composition and (B) a polyol composition containing a urethane polyol as a polyol component, the porous filler contains SiOin an amount of 50 mass % or more as a constituent component, and a loss tangent (tan &#x3b4;) of the outermost layer of the paint film measured with a dynamic viscoelasticity measuring apparatus under following conditions has a peak temperature in a range of from &#x2212;40&#xb0; C. to 40&#xb0; C.

An object of the present invention is to provide a golf ball having excellent approach spin performance under a dry condition and excellent approach spin performance under a condition that there is grass between the golf ball and the club face. 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 composed of at least one layer, and an outermost paint film layer located at the outermost layer of the golf ball contains, as a base resin, a polyurethane obtained by a reaction between (A) a polyisocyanate composition and (B) a polyol composition, and the outermost paint film layer has a dynamic friction coefficient of from 0.75 to 1.5 measured with a dynamic friction tester under specific conditions.

An object of the present invention is to provide a golf ball having excellent approach spin performance under a dry condition and excellent approach spin performance under a condition that there is grass between the golf ball and the club face. 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 composed of at least one layer, and an outermost paint film layer located at the outermost layer of the golf ball contains, as a base resin, a polyurethane obtained by a reaction between (A) a polyisocyanate composition and (B) a polyol composition, (B) the polyol composition contains a urethane polyol as a polyol component, and the outermost paint film layer has a dynamic friction coefficient of from 0.65 to 1.2 measured with a dynamic friction tester under specific conditions.

An object of the present invention is to provide a golf ball having improved ball speed or aerodynamic performance on a rainy day or the like by controlling the formulation of the paint film. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein a paint film surface of the golf ball has a water contact angle Aof 70&#xb0; or more and a water sliding angle Bof less than 50&#xb0;. The present invention also provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein when a sheet consisting of a slab formed from a composition constituting a golf ball body surface and a coating film formed by applying a paint constituting the paint film on the slab is prepared, a coating film surface of the sheet has a water contact angle Aof 90&#xb0; or more and a water sliding angle Bof less than 52&#xb0;.

An object of the present invention is to provide a golf ball showing improved controllability on approach shots for less than 40 yards, in particular, on approach shots around the green (about 10 yards to 20 yards) and improved controllability on approach shots from the rough, and showing excellent shot feeling. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein a loss tangent tan &#x3b4; has a peak temperature of 50&#xb0; C. or less and a peak height of less than 0.8, obtained by measuring dynamic viscoelasticity of the paint film under the following conditions: &#x3c;Measuring Conditions&#x3e; 

A golf ballincludes a main bodyand a paint layerpositioned outside the main body. The main bodyincludes a spherical core, a mid layerpositioned outside the core, and a coverpositioned outside the mid layer. An outer surface of the paint layerforms a surface of the golf ball. A contact angle CAw with respect to water measured on the surface of the golf ballis not less than 70 degrees. The paint layeris preferably formed from a resin composition. A preferable resin composition includes a polyurethane as a base resin and includes a silicone compound and/or a fluorine compound. Another preferable resin composition includes a silicone compound and/or a fluorine compound as a base resin and includes no polyurethane.

Growing community of inventors

Kobe, Japan

Kuniyasu Horiuchi