发明名称 |
Golf ball |
摘要 |
A center of a golf ball is formed from a composition having a flexural modulus from 150-450 MPa, a maximum loss factor (tan δ) between −20 and 0° C. of 0.08 or less, a rebound resilience of 55% or more, and a slab hardness ranging from 40-60 in Shore D hardness. The center composition includes, as a resin component, 30 to 70 mass % of (A) a modified polyester elastomer having a Shore A hardness of 95 or less; 70-30 mass % of (B) a binary ionomer resin having a Shore D hardness of 65 or more, a flexural modulus of 300 MPa or more, and a melt flow rate (190° C., 2.16 kg) of 1.0 g/10 min or more; and 0-50 mass % of (C) a thermoplastic resin other than (A) and (B) components (provided that a total content of (A), (B), and (C) components is 100 mass %). |
申请公布号 |
US8932152(B2) |
申请公布日期 |
2015.01.13 |
申请号 |
US201213645136 |
申请日期 |
2012.10.04 |
申请人 |
Dunlop Sports Co. Ltd. |
发明人 |
Okabe Satoko |
分类号 |
A63B37/04;A63B37/06;A63B37/00 |
主分类号 |
A63B37/04 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A golf ball having a center, a cover, and at least one intermediate layer disposed between the center and the cover, wherein the center is formed from a center composition having a flexural modulus ranging from 150 MPa to 450 MPa, a maximum loss factor (tan δ) between −20° C. and 0° C. of 0.08 or less, a rebound resilience of 55% or more, and a slab hardness ranging from 40 to 60 in Shore D hardness, and the center composition comprises, as a resin component,
30 mass % to 70 mass % of (A) a modified polyester elastomer having a Shore A hardness of 95 or less; 70 mass % to 30 mass % of (B) a binary ionomer resin having a Shore D hardness of 65 or more, a flexural modulus of 300 MPa or more, and a melt flow rate (190° C., 2.16 kg) of 1.0 g/10 min or more; and 0 mass % to 50 mass % of (C) a thermoplastic resin other than said (A) component and (B) component (provided that a total content of the (A) component, (B) component, and (C) component is 100 mass %), wherein (A) the modified polyester elastomer is obtained by a reaction between 0.01 mass % to 30 mass % of (a-3) an unsaturated carboxylic acid or a derivative thereof and 100 mass % of (a-2) a polyester elastomer containing a polyalkylene glycol component in a content ranging from 5 mass % to 90 mass % in a presence of (a-1) a radical generator. |
地址 |
Kobe-shi JP |