Toray Industries, Inc.

Bridgestone Sports Co., Ltd.

Bridgestone Tire Company Limited

Yoko Furuta

Chiaki Tanaka

Nagayoshi Naito

Rinya Takesue

Yasushi Ichikawa

Hiroyuki Nagasawa

Tasuku Saito

Tsutomu Matsunaga

Yasuharu Kawaguchi

Eiji Takehana

Nobuyuki Kataoka

Tutomu Noma

The invention provides a golf ball comprising a core of at least one layer, a cover of at least one layer, and optionally an intermediate layer therebetween, characterized in that at least one layer of the core, cover and intermediate layer is formed of a golf ball-forming resin composition comprising, in admixture, (A) 100 parts by weight of a polyether ester block copolymer composed primarily of (a) high-melting crystalline polymer segments made of crystalline aromatic polyester units and (b) low-melting polymer segments made of aliphatic polyether units and (B) 0.05&#x2013;10 parts by weight of a polyisocyanate compound. Using the golf ball-forming resin composition which has flexibility and high rebound resilience and is fully wear resistant, the inventive golf ball is improved in travel distance, feel, scuff resistance and impact durability.

Golf Ball

The invention provides a golf ball comprising a core of at least one layer, a cover of at least one layer, and optionally an intermediate layer therebetween, characterized in that at least one layer of the core, cover and intermediate layer is formed of a golf ball-forming resin composition comprising (A) 50&#x2013;95% by weight of a polyether ester block copolymer composed primarily of (a) high-melting crystalline polymer segments made of crystalline aromatic polyester units and (b) low-melting polymer segments made of aliphatic polyether units and (B) 5&#x2013;50% by weight of a thermoplastic polyurethane elastomer, the total of components (A) and (B) being 100 parts by weight, in admixture with (C) 0.05&#x2013;10 parts by weight of a polyisocyanate compound. The inventive golf ball is improved in travel distance, feel, scuff resistance and impact durability.

Golf ball

A golf ball comprising a part of a resin composition comprising (A) a polyester block copolymer, (B) an ionomer resin, (C) a polyester-aromatic vinyl copolymer block copolymer and (D) an epoxy-modified graft polymer comprising an olefin polymer backbone and vinyl polymer pendants wherein components (C) and (D) help to mix components (A) and (B) in a more compatible manner is provided. The resin composition has flexibility, high resilience, toughness, flexural fatigue resistance and tear strength, exhibits a sufficiently smooth flow in the melt to injection mold, and develops no delamination when molded, and the golf ball offers increased distance and pleasant feel upon impact and is endowed with superior durability.

A golf ball is formed with a resin composition which contains 5 to 95 weight % of a polyester block copolymer (A) and 95 to 5 weight % of an ionomer resin (B); and a (polyester-aromatic vinyl based copolymer) block copolymer (C), which is mixed with both the polyester block copolymer (A) and the ionomer resin (B) in an amount of 1 to 40 parts by weight on the basis of 100 parts by weight of the total of the polyester block copolymer (A) and the ionomer resin (B). The polyester block copolymer (A) mainly contains a high-melting point crystalline polymer segment (a1) composed of a crystalline aromatic polyester unit, and a low-melting point polymer segment (a2) composed of an aliphatic polyether unit and/or an aliphatic polyester unit. The ionomer resin (B) is produced by neutralizing a copolymer mainly containing an &agr;-olefine (b1) and an &agr;,&bgr;-unsaturated carboxylic acid (b2) having 3 to 8 carbon atoms with at least one metal ion (b3) selected from univalent, divalent, and trivalent metal ions. The (polyester-aromatic vinyl based copolymer) block copolymer (C) contains a block (c1) composed of a polyester, and at least one block (c2) selected from block or random copolymers containing aromatic vinyl based monomers and conjugated dienes and/or hydrogenated products thereof.

A solid type golf ball comprising a central core and an outer cover for the core and having an excellent flight performance and durability and acceptable 'click' characteristics is presented. The main component of the outer cover of this golf ball is a polyetherester block copolymer containing the following X, Y and Z units:

An improved golf ball having a thread-wound central core and an outer cover is provided. The outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of at least one .alpha.-olefin and at least one .alpha.,.beta.-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer, the content, in said composition, of said polyester elastomer being 50% by weight or less. This golf ball has excellent cutting resistance, 'click' characteristics and impact resilience.

A polyetherester block copolymer having enhanced compatibility of soft polyether segments with hard polyester segments thereof, excellent mechanical strength, a proper melt fluidity and enhanced resistance to chemicals, heat and light, which copolymer comprises (1) 50 to 95% by weight of polyester segments comprising a dicarboxylic acid component containing at least 50 molar percent of terephthalic acid and a diol component containing at least 50 molar percent of 1,4-butane diol and (2) 5 to 50% by weight of polyether segments comprising poly(tetramethylene oxide)glycol, which is characterized by a large number average molecular weight of from 1,500 to 2,500 and by a small variance of less than 1.70 in molecular weight distribution.

Polyetherester block copolymer and process for producing the same

Disclosed is a blockcopolyetherester composition stabilized by the incorporation of a polysulfide polymer. Products prepared from this composition exhibit an excellent thermal stability as well as UV-light resistance.

Growing community of inventors

Nagoya, Japan

Yoko Furuta