JP2012045350A - ゴルフボール - Google Patents
ゴルフボール Download PDFInfo
- Publication number
- JP2012045350A JP2012045350A JP2010205093A JP2010205093A JP2012045350A JP 2012045350 A JP2012045350 A JP 2012045350A JP 2010205093 A JP2010205093 A JP 2010205093A JP 2010205093 A JP2010205093 A JP 2010205093A JP 2012045350 A JP2012045350 A JP 2012045350A
- Authority
- JP
- Japan
- Prior art keywords
- golf ball
- less
- hardness
- polyurethane
- bis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 claims abstract description 82
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 55
- 229920002635 polyurethane Polymers 0.000 claims abstract description 53
- 239000004814 polyurethane Substances 0.000 claims abstract description 53
- 229920005989 resin Polymers 0.000 claims abstract description 40
- 239000011347 resin Substances 0.000 claims abstract description 40
- 230000000704 physical effect Effects 0.000 claims abstract description 8
- 239000000470 constituent Substances 0.000 claims abstract description 7
- ROHUXHMNZLHBSF-UHFFFAOYSA-N 1,4-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCC(CN=C=O)CC1 ROHUXHMNZLHBSF-UHFFFAOYSA-N 0.000 claims description 27
- 238000005259 measurement Methods 0.000 claims description 24
- 239000005056 polyisocyanate Substances 0.000 claims description 20
- 229920001228 polyisocyanate Polymers 0.000 claims description 20
- DYLIWHYUXAJDOJ-OWOJBTEDSA-N (e)-4-(6-aminopurin-9-yl)but-2-en-1-ol Chemical compound NC1=NC=NC2=C1N=CN2C\C=C\CO DYLIWHYUXAJDOJ-OWOJBTEDSA-N 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 10
- 238000013459 approach Methods 0.000 abstract description 25
- 230000010355 oscillation Effects 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 description 43
- 239000010410 layer Substances 0.000 description 39
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- 229920005862 polyol Polymers 0.000 description 32
- 150000003077 polyols Chemical class 0.000 description 31
- 238000000465 moulding Methods 0.000 description 26
- 238000000034 method Methods 0.000 description 23
- 229920000554 ionomer Polymers 0.000 description 20
- -1 isocyanatomethyl Chemical group 0.000 description 16
- 229920000768 polyamine Polymers 0.000 description 15
- 239000011701 zinc Substances 0.000 description 15
- 239000011734 sodium Substances 0.000 description 14
- 229920003182 Surlyn® Polymers 0.000 description 12
- 239000002585 base Substances 0.000 description 12
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- 238000006243 chemical reaction Methods 0.000 description 11
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- 125000003118 aryl group Chemical group 0.000 description 10
- GUUVPOWQJOLRAS-UHFFFAOYSA-N Diphenyl disulfide Chemical class C=1C=CC=CC=1SSC1=CC=CC=C1 GUUVPOWQJOLRAS-UHFFFAOYSA-N 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 9
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- 229910021645 metal ion Inorganic materials 0.000 description 9
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- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 8
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 7
- 229920006347 Elastollan Polymers 0.000 description 7
- 239000004721 Polyphenylene oxide Substances 0.000 description 7
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 7
- 125000003277 amino group Chemical group 0.000 description 7
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 7
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- 239000011777 magnesium Substances 0.000 description 7
- 229920000570 polyether Polymers 0.000 description 7
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 7
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 6
- XSCLFFBWRKTMTE-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCCC(CN=C=O)C1 XSCLFFBWRKTMTE-UHFFFAOYSA-N 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 239000012948 isocyanate Substances 0.000 description 6
- 150000002513 isocyanates Chemical group 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 125000002947 alkylene group Chemical group 0.000 description 5
- 230000003712 anti-aging effect Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 239000003999 initiator Substances 0.000 description 5
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
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- QXRRAZIZHCWBQY-UHFFFAOYSA-N 1,1-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1(CN=C=O)CCCCC1 QXRRAZIZHCWBQY-UHFFFAOYSA-N 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 4
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 4
- 229920002614 Polyether block amide Polymers 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 239000012975 dibutyltin dilaurate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 4
- 229920003052 natural elastomer Polymers 0.000 description 4
- 229920001194 natural rubber Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920001897 terpolymer Polymers 0.000 description 4
- 229920002725 thermoplastic elastomer Polymers 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 239000012463 white pigment Substances 0.000 description 4
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 3
- 241001550224 Apha Species 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- OXIKYYJDTWKERT-UHFFFAOYSA-N [4-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCC(CN)CC1 OXIKYYJDTWKERT-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
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- 150000002009 diols Chemical class 0.000 description 3
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- 230000001771 impaired effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 150000002898 organic sulfur compounds Chemical class 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- NNOZGCICXAYKLW-UHFFFAOYSA-N 1,2-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC=C1C(C)(C)N=C=O NNOZGCICXAYKLW-UHFFFAOYSA-N 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 2
- GQHTUMJGOHRCHB-UHFFFAOYSA-N 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine Chemical compound C1CCCCN2CCCN=C21 GQHTUMJGOHRCHB-UHFFFAOYSA-N 0.000 description 2
- BYPFICORERPGJY-UHFFFAOYSA-N 3,4-diisocyanatobicyclo[2.2.1]hept-2-ene Chemical compound C1CC2(N=C=O)C(N=C=O)=CC1C2 BYPFICORERPGJY-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
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- 125000002723 alicyclic group Chemical group 0.000 description 2
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- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
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- VFBSQBTUKCZKTI-UHFFFAOYSA-N 1,3-dibromo-5-[(3,5-dibromophenyl)disulfanyl]benzene Chemical compound BrC1=CC(Br)=CC(SSC=2C=C(Br)C=C(Br)C=2)=C1 VFBSQBTUKCZKTI-UHFFFAOYSA-N 0.000 description 1
- LSMZVCLPPFOFNM-UHFFFAOYSA-N 1,3-dichloro-2-[(2,6-dichlorophenyl)disulfanyl]benzene Chemical compound ClC1=CC=CC(Cl)=C1SSC1=C(Cl)C=CC=C1Cl LSMZVCLPPFOFNM-UHFFFAOYSA-N 0.000 description 1
- JMQANWHMOHXBEA-UHFFFAOYSA-N 1,3-dichloro-5-[(3,5-dichlorophenyl)disulfanyl]benzene Chemical compound ClC1=CC(Cl)=CC(SSC=2C=C(Cl)C=C(Cl)C=2)=C1 JMQANWHMOHXBEA-UHFFFAOYSA-N 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- RSZIPSKIWRSQAU-UHFFFAOYSA-N 1,4-dibromo-2-[(2,5-dibromophenyl)disulfanyl]benzene Chemical compound BrC1=CC=C(Br)C(SSC=2C(=CC=C(Br)C=2)Br)=C1 RSZIPSKIWRSQAU-UHFFFAOYSA-N 0.000 description 1
- QGKFQPPIXYPVIE-UHFFFAOYSA-N 1,4-dichloro-2-[(2,5-dichlorophenyl)disulfanyl]benzene Chemical compound ClC1=CC=C(Cl)C(SSC=2C(=CC=C(Cl)C=2)Cl)=C1 QGKFQPPIXYPVIE-UHFFFAOYSA-N 0.000 description 1
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
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Abstract
【解決手段】本発明のゴルフボールは、樹脂成分として、ポリウレタンエラストマーを含有し、動的粘弾性装置を用いて、加振周波数10Hz、温度0℃の測定条件で、剪断モードで測定した剪断損失弾性率G”が5.03×106Pa以下であって、反発弾性が54%以上の物性を満足するポリウレタン組成物から形成された構成部材を有することを特徴とする。
【選択図】なし
Description
本発明は、上記事情に鑑みてなされたものであり、アプローチショットに対しては高スピン量であり、かつ、反発性の高いゴルフボールを提供することを目的とする。
(1)剪断損失弾性率G”
ポリウレタン組成物の剪断損失弾性率G”を以下の条件で測定した。
装置:TAインスツルメント社製レオメータARES
測定サンプル:プレス成形により、厚み2mmのポリウレタンシートを作製し、このポリウレタンシートから、幅10mm、クランプ間距離10mmになるように試料片を切り出した。
測定モード:捻り(剪断)
測定温度:0℃
加振周波数:10Hz
測定ひずみ:0.1%
ゴルフラボラトリー社製スイングロボットに、アプローチウェッジ(クリーブランド社製CG15フォージドウェッジ 52°)を取り付け、ヘッドスピード21m/秒でゴルフボールを打撃し、打撃されたゴルフボールを連続写真撮影することによってスピン量(rpm)を測定した。測定は、各ゴルフボールについて10回ずつ行い、その平均値をスピン量とした。
ポリウレタン組成物を用いて、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。
スプリング式硬度計JIS−C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、コアの表面部において測定したJIS−C硬度をコア表面硬度とした。また、コアを半球状に切断し、切断面の中心において測定したJIS−C硬度をコア中心硬度とした。
ポリウレタン組成物を用いて、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の円形状に打ち抜いたものを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。
各ゴルフボールに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ゴルフボールの速度を測定し、それぞれの速度および重量から各ゴルフボールの反発係数を算出した。測定は各ゴルフボールについて12個ずつ行って、その平均値を各ゴルフボールの反発係数とした。なお、反発係数は、ゴルフボールNo.10の反発係数を100.0として、指数化した値で示した。
調製例1
13C−NMR測定によるトランス体/シス体のモル比が93/7の1,4−ビス(アミノメチル)シクロヘキサン(三菱瓦斯化学社製)を原料として、冷熱2段ホスゲン化法を常圧下で実施した。すなわち、フラスコに、撹拌機、温度計、ホスゲン導入管、滴下ロートおよび冷却管を取り付けて、そのフラスコにオルトジクロロベンゼン400質量部を仕込んだ。フラスコを冷水で冷却しながら、フラスコ内の温度を10℃以下とし、ホスゲン導入管よりホスゲン280質量部を導入した。滴下ロートに1,4−ビス(アミノメチル)シクロヘキサン100質量部およびオルトジクロロベンゼン500質量部の混合液を仕込み、その混合液を30分かけてフラスコ内に添加した。この間、フラスコ内の温度を30℃以下に維持した。添加終了後、フラスコ内は、白色スラリー状液となった。再び、ホスゲンを導入しながら反応温度を150℃まで上昇させ、150℃で5時間反応を継続させた。フラスコ内の反応液は淡褐色透明な液体となった。反応終了後、100〜150℃で窒素ガスを10L/時で通気し、脱ガスした。減圧下で溶媒のオルトジクロロベンゼンを留去し、さらに減圧蒸留により、沸点138〜140℃/0.7KPaの留分を採取した。これによって、無色透明液体として、1,4−ビス(イソシアナトメチル)シクロヘキサン123質量部(収率90%)を得た。得られた1,4−ビス(イソシアナトメチル)シクロヘキサンのガスクロマトグラフィー測定による純度は、99.9%、APHA測定による色相は5、13C−NMR測定によるトランス体/シス体のモル比は、93/7であった。以下、トランス体/シス体のモル比が93/7の1,4−ビス(イソシアナトメチル)シクロへキサンを「BIC93」と称する。
13C−NMR測定によるトランス体/シス体のモル比が41/59の1,4−ビス(アミノメチル)シクロヘキサン(東京化成工業社製)を原料として用いた以外は、調製例1と同様の方法により、1,4−ビス(イソシアナトメチル)シクロヘキサンを合成した。得られた1,4−ビス(イソシアナトメチル)シクロヘキサンのガスクロマトグラフィーによる純度は、99.9%、APHA測定による色相は5、13C−NMR測定によるトランス体/シス体のモル比は、41/59であった。以下、トランス体/シス体のモル比が41/59の1,4−ビス(イソシアナトメチル)シクロへキサンを「BIC41」と称する。
BIC93とBIC41とを86.5:13.5で混合して、トランス体/シス体のモル比が86/14の1,4−ビス(イソシアナトメチル)シクロヘキサンを得た。以下、トランス体/シス体のモル比が86/14の1,4−ビス(イソシアナトメチル)シクロへキサンを「BIC86」と称する。
BIC93とBIC41とを69.2:30.8で混合して、トランス体/シス体のモル比が77/23の1,4−ビス(イソシアナトメチル)シクロヘキサンを得た。以下、トランス体/シス体のモル比が77/23の1,4−ビス(イソシアナトメチル)シクロへキサンを「BIC77」と称する。
13C−NMR測定によるトランス体/シス体のモル比が74/26の1,3−ビス(アミノメチル)シクロヘキサン(東京化成工業社製)を原料として用いた以外は、調製例1と同様の方法により、1,3−ビス(イソシアナトメチル)シクロヘキサンを合成した。得られた1,3−ビス(イソシアナトメチル)シクロヘキサンのガスクロマトグラフィーによる純度は、99.9%、APHA測定による色相は5、13C−NMR測定によるトランス体/シス体のモル比は、74/26であった。以下、トランス体/シス体のモル比が74/26の1,3−ビス(イソシアナトメチル)シクロへキサンを「BIC74」と称する。
表1に示した組成比を有するポリウレタンエラストマーを、以下のようにして合成した。80℃に加熱したビス(イソシアナトメチル)シクロヘキサン(BIC)に、80℃に加熱したポリテトラメチレンエーテルグリコール(PTMG2000)を投入し、さらに、原料(BIC、PTMG2000およびBD)の総量の0.005質量%のジブチルチンジラウレート(アルドリッチ社製)を投入した後、窒素気流下にて、80℃で2時間撹拌を行った。続いて、窒素気流下にて、80℃に加熱した1,4−ブタンジオール(BD)を投入した後、80℃で1分間撹拌を行った。その後、反応液を冷却して、室温にて1分間減圧することにより系中の脱気を行った。脱気後の反応液を、容器に延展し、窒素雰囲気下、110℃にて6時間保存することにより、ウレタン化反応を行いポリウレタンエラストマーを得た。
BIC77:1,4−ビス(イソシアナトメチル)シクロヘキサン(トランス体:77モル%)
BIC74:1,3−ビス(イソシアナトメチル)シクロヘキサン(トランス体:74モル%)
PTMG2000:BASFジャパン社製ポリテトラメチレンエーテルグリコール(数平均分子量2000)
BD:東京化成工業社製1,4−ブタンジオール
(1)センターの作製
表2に示す配合のセンター用ゴム組成物を混練し、半球状キャビティを有する上下金型内で170℃で15分間加熱プレスすることにより球状のセンター(直径38.5mm)を得た。
アクリル酸亜鉛:日本蒸留製、「ZNDA−90S」
酸化亜鉛:東邦亜鉛製、「銀嶺R」
ジフェニルジスルフィド:住友精化製
ジクミルパーオキサイド:日本油脂製、「パークミル(登録商標)D」
次に、表3に示した配合の中間層材料を、二軸混練型押出機により押し出して、ペレット状の中間層用組成物を調製した。押出は、スクリュー径45mm、スクリュー回転数200rpm、スクリューL/D=35で行った。配合物は、押出機のダイの位置で150〜230℃に加熱された。得られた中間層用組成物を上述のようにして得られたセンター上に射出成形して、センターと前記センターを被覆する中間層を有するコア(直径41.7mm)を作製した。
ハイミランAM7329:三井デュポンポリケミカル社製の亜鉛イオン中和エチレン−メタクリル酸共重合体系アイオノマー樹脂
表4に示したポリウレタンエラストマー100質量部に対して酸化チタン4質量部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、ペレット状のカバー用組成物を得た。押出は、スクリュー径45mm、スクリュー回転数200rpm、スクリューL/D=35で行った。配合物は、押出機のダイの位置で150〜230℃に加熱された。ハーフシェルの圧縮成形は、得られたペレット状のカバー用組成物をハーフシェル成形用金型の下型の凹部ごとに1つずつ投入し、加圧してハーフシェルを成形した。圧縮成形は、成形温度170℃、成形時間5分、成形圧力2.94MPaの条件で行った。
(3)で得られたコアを(4)で得られた2枚のハーフシェルで同心円状に被覆して、圧縮成形によりカバー(厚み0.5mm)を成形した。圧縮成形は、成形温度145℃、成形時間2分、成形圧力9.8MPaの条件で行った。
エラストラン1190ATR:BASFジャパン社製、MDI−ポリエーテル系ポリウレタンエラストマー(JIS−A硬度90)
エラストラン1195ATR:BASFジャパン社製、MDI−ポリエーテル系ポリウレタンエラストマー(JIS−A硬度95)
エラストランXNY85A:BASFジャパン社製、H12MDI−ポリエーテル系ポリウレタンエラストマー(JIS−A硬度85)
エラストランXNY90A:BASFジャパン社製、H12MDI−ポリエーテル系ポリウレタンエラストマー(JIS−A硬度90)
エラストランXNY95A:BASFジャパン社製、H12MDI−ポリエーテル系ポリウレタンエラストマー(JIS−A硬度95)
Claims (7)
- 樹脂成分として、ポリウレタンエラストマーを含有し、動的粘弾性装置を用いて、加振周波数10Hz、温度0℃の測定条件で、剪断モードで測定した剪断損失弾性率G”が5.03×106Pa以下であって、反発弾性が54%以上の物性を満足するポリウレタン組成物から形成された構成部材を有することを特徴とするゴルフボール。
- ポリウレタン組成物の樹脂成分中における前記ポリウレタンエラストマーの含有率は、50質量%以上である請求項1に記載のゴルフボール。
- 前記ポリウレタンエラストマーは、ポリイソシアネート成分として、1,4−ビス(イソシアナトメチル)シクロヘキサンを用いたものである請求項1または2に記載のゴルフボール。
- 前記1,4−ビス(イソシアナトメチル)シクロヘキサンは、トランス体の比率が80モル%以上である請求項3に記載のゴルフボール。
- 前記ポリウレタン組成物の剪断損失弾性率G”が1.60×106Pa以下である請求項1〜4のいずれか一項に記載のゴルフボール。
- 前記構成部材がカバーである請求項1〜5のいずれか一項に記載のゴルフボール。
- 前記ポリウレタン組成物のスラブ硬度は、ショアD硬度で25〜53である請求項1〜6のいずれか一項に記載のゴルフボール。
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JP2006312044A (ja) * | 2005-05-04 | 2006-11-16 | Bridgestone Sports Co Ltd | スリーピースソリッドゴルフボール |
US20080090678A1 (en) * | 2006-10-17 | 2008-04-17 | Taylor Made Golf Company, Inc. | Polymer compositions and golf balls with reduced yellowing |
JP2008161374A (ja) * | 2006-12-27 | 2008-07-17 | Sri Sports Ltd | ゴルフボール |
JP2009072458A (ja) * | 2007-09-21 | 2009-04-09 | Katsuji Matsunaga | ゴルフボール |
WO2009051114A1 (ja) * | 2007-10-15 | 2009-04-23 | Mitsui Chemicals Polyurethanes, Inc. | ポリウレタン樹脂 |
JP2009112654A (ja) * | 2007-11-08 | 2009-05-28 | Sri Sports Ltd | ゴルフボール |
JP2009131508A (ja) * | 2007-11-30 | 2009-06-18 | Sri Sports Ltd | ゴルフボール |
JP2010274115A (ja) * | 2009-05-27 | 2010-12-09 | Acushnet Co | 脂環式イソシアネートに基づくゴルフボール用ポリ尿素カバー |
JP2011140618A (ja) * | 2009-12-10 | 2011-07-21 | Mitsui Chemicals Inc | カバー材 |
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