JP5916380B2 - ゴルフボール用樹脂組成物およびゴルフボール - Google Patents
ゴルフボール用樹脂組成物およびゴルフボール Download PDFInfo
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- JP5916380B2 JP5916380B2 JP2011289983A JP2011289983A JP5916380B2 JP 5916380 B2 JP5916380 B2 JP 5916380B2 JP 2011289983 A JP2011289983 A JP 2011289983A JP 2011289983 A JP2011289983 A JP 2011289983A JP 5916380 B2 JP5916380 B2 JP 5916380B2
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- Prior art keywords
- acid
- golf ball
- resin composition
- unsaturated carboxylic
- metal salt
- Prior art date
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- 239000011347 resin Substances 0.000 claims description 110
- 229920000554 ionomer Polymers 0.000 claims description 69
- 229910052751 metal Inorganic materials 0.000 claims description 69
- 239000002184 metal Substances 0.000 claims description 69
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- 235000014113 dietary fatty acids Nutrition 0.000 claims description 50
- 229930195729 fatty acid Natural products 0.000 claims description 50
- 239000000194 fatty acid Substances 0.000 claims description 50
- 150000004665 fatty acids Chemical class 0.000 claims description 50
- 150000003839 salts Chemical class 0.000 claims description 49
- 125000004432 carbon atom Chemical group C* 0.000 claims description 47
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- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 38
- 229910021645 metal ion Inorganic materials 0.000 claims description 33
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- 229920001897 terpolymer Polymers 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 15
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- 238000003860 storage Methods 0.000 claims description 14
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- ZQPPMHVWECSIRJ-MDZDMXLPSA-N elaidic acid Chemical compound CCCCCCCC\C=C\CCCCCCCC(O)=O ZQPPMHVWECSIRJ-MDZDMXLPSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 229910052788 barium Inorganic materials 0.000 claims description 5
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- BITHHVVYSMSWAG-KTKRTIGZSA-N (11Z)-icos-11-enoic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCC(O)=O BITHHVVYSMSWAG-KTKRTIGZSA-N 0.000 claims description 4
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- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 claims description 3
- 235000020661 alpha-linolenic acid Nutrition 0.000 claims description 3
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- TWSWSIQAPQLDBP-CGRWFSSPSA-N (7e,10e,13e,16e)-docosa-7,10,13,16-tetraenoic acid Chemical compound CCCCC\C=C\C\C=C\C\C=C\C\C=C\CCCCCC(O)=O TWSWSIQAPQLDBP-CGRWFSSPSA-N 0.000 claims description 2
- CUXYLFPMQMFGPL-UHFFFAOYSA-N (9Z,11E,13E)-9,11,13-Octadecatrienoic acid Natural products CCCCC=CC=CC=CCCCCCCCC(O)=O CUXYLFPMQMFGPL-UHFFFAOYSA-N 0.000 claims description 2
- HVGRZDASOHMCSK-UHFFFAOYSA-N (Z,Z)-13,16-docosadienoic acid Natural products CCCCCC=CCC=CCCCCCCCCCCCC(O)=O HVGRZDASOHMCSK-UHFFFAOYSA-N 0.000 claims description 2
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- OPGOLNDOMSBSCW-CLNHMMGSSA-N Fursultiamine hydrochloride Chemical compound Cl.C1CCOC1CSSC(\CCO)=C(/C)N(C=O)CC1=CN=C(C)N=C1N OPGOLNDOMSBSCW-CLNHMMGSSA-N 0.000 claims description 2
- 241001125046 Sardina pilchardus Species 0.000 claims description 2
- TWSWSIQAPQLDBP-UHFFFAOYSA-N adrenic acid Natural products CCCCCC=CCC=CCC=CCC=CCCCCCC(O)=O TWSWSIQAPQLDBP-UHFFFAOYSA-N 0.000 claims description 2
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Images
Classifications
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/04—Acids, Metal salts or ammonium salts thereof
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- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
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- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/005—Cores
- A63B37/0051—Materials other than polybutadienes; Constructional details
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- A—HUMAN NECESSITIES
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- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/005—Cores
- A63B37/0051—Materials other than polybutadienes; Constructional details
- A63B37/0059—Ionomer
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/005—Cores
- A63B37/006—Physical properties
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
- A63B37/0073—Solid, i.e. formed of a single piece
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
- C08L23/0876—Neutralised polymers, i.e. ionomers
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Description
log(E’/E”2)≧−5.84
log(E’/E”2)≧−5.84
前記log(E’/E”2)は、−5.77以上がより好ましい。また、前記log(E’/E”2)は、特に限定されないが、−3.00以下が好ましく、−3.20以下がより好ましい。前記log(E’/E”2)が−3.00になると、反発係数が最大値である1に近づくからである。前記log(E’/E”2)は、後述する(A)樹脂成分および(B)塩基性脂肪酸金属塩の種類、含有量などを適宜選択することにより制御することができる。なお、上記式においてlogは常用対数である。
について説明する。
アイオノマー樹脂の中和度(モル%)=100×アイオノマー樹脂中の中和されているカルボキシル基のモル数/アイオノマー樹脂中のカルボキシル基の総モル数
mM1O・M2(RCOO)2 ・・・(1)
(1)式中、mは、上記式(1)に示される塩基性脂肪酸金属塩中の金属酸化物または金属水酸化物のモル数を示すものである。mは、0.1〜2.0であることが好ましく、0.2〜1.5であることがより好ましい。mが0.1未満であれば、得られる樹脂組成物の反発性が低下する場合があり、mが2.0を超えると、塩基性脂肪酸金属塩の融点が高くなり過ぎて、樹脂成分への分散性が困難になる場合がある。M1およびM2は、それぞれ周期表第2族または第12族に属する金属が好ましい。M1およびM2は、同一または異なっていてもよい。第2族に属する金属としては、ベリリウム、マグネシウム、カルシウム、ストロンチウム、バリウムを挙げることができる。第12族に属する金属としては、亜鉛、カドミウム、水銀を挙げることができる。M1およびM2の金属としては、例えば、マグネシウム、カルシウム、バリウム、亜鉛が好ましく、マグネシウムがより好ましい。
(1)スラブ硬度(ショアD硬度)
ゴルフボール用樹脂組成物を用いて、熱プレス成形により、厚み約2mmのシートを作製し、23℃で2週間保存した。このシートを、測定基板などの影響が出ないように、3枚以上重ねた状態で、ASTM−D2240に規定するスプリング式硬度計ショアD型を備えた高分子計器社製自動ゴム硬度計P1型を用いて測定した。
MFRは、フローテスター(島津製作所社製、島津フローテスターCFT−100C)を用いて、JIS K7210に準じて測定した。なお、測定は、測定温度190℃、荷重2.16kgの条件で行った。
ゴルフボール用樹脂組成物を用いて、熱プレス成形にて厚み約2mmのシートを作製し、当該シートから直径28mmの円形状に打抜いたものを6枚重ねることにより、厚さ約12mm、直径28mmの円柱状試験片を作製した。この試験片についてリュプケ式反発弾性試験(試験温湿度23℃、50RH%)を行った。なお、試験片の作製および試験方法は、JIS K6255に準じて行った。
球形体に初期荷重98Nを負荷した状態から終荷重1275Nを負荷したときまでの圧縮方向の変形量(圧縮方向に球形体が縮む量)を測定した。圧縮変形量は、球形体No.5の変形量を1.00として指数化した値で示した。
各球形体に198.4gの金属製円筒物を40m/秒の速度で衝突させ、衝突前後の円筒物および球形体の速度を測定し、それぞれの速度および重量から各球形体の反発係数を算出した。測定は、各球形体について12個ずつ行って、その平均値を各球形体の反発係数とした。
アマチュアゴルファー(上級者)10人により、ドライバーを用いた実打テストを行って、各人の打撃時のフィーリングを下記基準で評価させた。10人の評価のうち、最も多い評価をそのゴルフボールの打球感とした。
評価基準
優:衝撃が少なくてフィーリングが良い。
良:普通。
不良:衝撃が大きくてフィーリングが悪い。
ゴルフボール用樹脂組成物の貯蔵弾性率E’(Pa)および損失弾性率E”(Pa)を以下の条件で測定した。
装置:ユービーエム社製動的粘弾性測定装置Rheogel−E4000
測定サンプル:ゴルフボール用樹脂組成物から、熱プレス成形により厚み2mmのシートを作製し、このシートから、幅4mm、クランプ間距離20mmになるように試料片を切り出した。
測定モード:引張
測定温度:12℃
加振周波数:10Hz
測定ひずみ:0.05%
表1〜表3に示すように、配合材料をドライブレンドし、二軸混練型押出機によりミキシングして、ストランド状に冷水中に押し出した。押出されたストランドをペレタイザーにより切断してペレット状のゴルフボール用樹脂組成物を調製した。押出条件は、スクリュー径45mm、スクリュー回転数200rpm、スクリューL/D=35であり、配合物は、押出機のダイの位置で160〜230℃に加熱された。得られたペレット状のゴルフボール用樹脂組成物を220℃にて射出成形し、直径40mmの球形体(コア)を得た。
サーリン6320:デュポン社製、マグネシウムイオン中和エチレン−メタクリル酸−アクリル酸ブチル三元共重合体アイオノマー樹脂(メルトフローレイト(190℃×2.16kg):1.0g/10min)
ニュクレルAN4319:三井・デュポンポリケミカル社製、エチレン・メタクリル酸・アクリル酸ブチル共重合体(メルトフローレイト(190℃×2.16kg):55g/10min、曲げ剛性率:21MPa)
ニュクレルN1560:三井・デュポンポリケミカル社製、エチレン・メタクリル酸共重合体(メルトフローレイト(190℃×2.16kg):60g/10min、ショアD硬度:53、曲げ剛性率:83MPa)
塩基性オレイン酸マグネシウム:日東化成工業社製(金属含有量1.8モル%、(1)式において、M1=M2=Mg,R=炭素数17)
オレイン酸マグネシウム:日東化成工業社製
オレイン酸:和光純薬工業社製
ベヘニン酸マグネシウム:和光純薬工業社製
水酸化マグネシウム:和光純薬工業社製
log(E’/E”2)≧−5.84
Claims (8)
- (A)(a−1)オレフィンと、炭素数3〜8個のα,β−不飽和カルボン酸との二元共重合体、(a−2)オレフィンと、炭素数3〜8個のα,β−不飽和カルボン酸との二元共重合体の金属イオン中和物からなるアイオノマー樹脂、(a−3)オレフィンと炭素数3〜8個のα,β−不飽和カルボン酸とα,β−不飽和カルボン酸エステルとの三元共重合体、および、(a−4)オレフィンと炭素数3〜8個のα,β−不飽和カルボン酸とα,β−不飽和カルボン酸エステルとの三元共重合体の金属イオン中和物からなるアイオノマー樹脂より成る群から選択される少なくとも一種の樹脂成分と、(B)塩基性脂肪酸金属塩とを含有し、
前記(B)塩基性脂肪酸金属塩は、下記一般式(1)で示されるものであり、
mM 1 O・M 2 (RCOO) 2 ・・・(1)
((1)式中、mは、0.1〜2.0であり、M 1 およびM 2 は、それぞれ周期表第2族または第12族に属する金属であり、M 1 およびM 2 は、同一または異なっていてもよく、RCOOは、飽和脂肪酸または不飽和脂肪酸の残基を示す)
前記(B)塩基性脂肪酸金属塩の含有量は、(A)樹脂成分100質量部に対して、25質量部〜100質量部であり、
動的粘弾性装置を用いて、引張モードで測定したときに、貯蔵弾性率E’(Pa)と損失弾性率E”(Pa)とが、下記式を満足することを特徴とするゴルフボール用樹脂組成物。
log(E’/E”2)≧−5.84 - (B)前記塩基性脂肪酸金属塩は、炭素数が8〜30の塩基性脂肪酸金属塩である請求項1に記載のゴルフボール用樹脂組成物。
- (B)前記塩基性脂肪酸金属塩は、塩基性不飽和脂肪酸金属塩である請求項1または2に記載のゴルフボール用樹脂組成物。
- (B)前記塩基性脂肪酸金属塩の不飽和脂肪酸成分は、オレイン酸、エルカ酸、リノール酸、リノレン酸、アラキドン酸、エイコサペンタエン酸、ドコサヘキサエン酸、ステアリドン酸、ネルボン酸、バクセン酸、ガドレイン酸、エライジン酸、エイコセン酸、エイコサジエン酸、ドコサジエン酸、ピノレン酸、エレオステアリン酸、ミード酸、アドレン酸、イワシ酸、ニシン酸、および、テトラコサペンタエン酸よりなる群から選択される少なくとも一種である請求項3に記載のゴルフボール用樹脂組成物。
- (B)前記塩基性脂肪酸金属塩の金属成分が、マグネシウム、カルシウム、亜鉛、または、バリウムである請求項1〜4のいずれか一項に記載のゴルフボール用樹脂組成物。
- 前記貯蔵弾性率E’(Pa)が、1×10 5 Pa〜50×10 7 Paである請求項1〜5のいずれか一項に記載のゴルフボール用樹脂組成物。
- 少なくとも一層以上のコアと前記コアを被覆するカバーとを有するゴルフボールであって、前記コアの少なくとも一層が請求項1〜6のいずれか一項に記載のゴルフボール用樹脂組成物から形成されていることを特徴とするゴルフボール。
- ゴルフボール本体が請求項1〜6のいずれか一項に記載のゴルフボール用樹脂組成物から形成されていることを特徴とするワンピースゴルフボール。
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CN201210572477.8A CN103183854B (zh) | 2011-12-28 | 2012-12-25 | 高尔夫球用树脂组合物及高尔夫球 |
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