JP5564015B2 - チューブおよびチューブの製造方法 - Google Patents
チューブおよびチューブの製造方法 Download PDFInfo
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- JP5564015B2 JP5564015B2 JP2011162186A JP2011162186A JP5564015B2 JP 5564015 B2 JP5564015 B2 JP 5564015B2 JP 2011162186 A JP2011162186 A JP 2011162186A JP 2011162186 A JP2011162186 A JP 2011162186A JP 5564015 B2 JP5564015 B2 JP 5564015B2
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- Prior art keywords
- tube
- polyol
- molecular weight
- acid
- cyclohexane
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims description 18
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- -1 bismuth carboxylate Chemical class 0.000 claims description 74
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- 239000012948 isocyanate Substances 0.000 claims description 40
- 150000002513 isocyanates Chemical class 0.000 claims description 40
- ROHUXHMNZLHBSF-UHFFFAOYSA-N 1,4-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCC(CN=C=O)CC1 ROHUXHMNZLHBSF-UHFFFAOYSA-N 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 13
- 150000007942 carboxylates Chemical class 0.000 claims description 10
- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 description 57
- 238000003786 synthesis reaction Methods 0.000 description 56
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 32
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 29
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- 230000000052 comparative effect Effects 0.000 description 7
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 7
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- 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 6
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- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 6
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- 238000011156 evaluation Methods 0.000 description 6
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- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 6
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- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 5
- WWZKQHOCKIZLMA-UHFFFAOYSA-N Caprylic acid Natural products CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 5
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- 239000002253 acid Substances 0.000 description 5
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
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- 238000006116 polymerization reaction Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- OXIKYYJDTWKERT-UHFFFAOYSA-N [4-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCC(CN)CC1 OXIKYYJDTWKERT-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 4
- KQWGXHWJMSMDJJ-UHFFFAOYSA-N cyclohexyl isocyanate Chemical compound O=C=NC1CCCCC1 KQWGXHWJMSMDJJ-UHFFFAOYSA-N 0.000 description 4
- 239000012975 dibutyltin dilaurate Substances 0.000 description 4
- 239000000539 dimer Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 4
- 235000013872 montan acid ester Nutrition 0.000 description 4
- UTOPWMOLSKOLTQ-UHFFFAOYSA-N octacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O UTOPWMOLSKOLTQ-UHFFFAOYSA-N 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
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- 239000000654 additive Substances 0.000 description 3
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- 125000003118 aryl group Chemical group 0.000 description 3
- NSPSPMKCKIPQBH-UHFFFAOYSA-K bismuth;7,7-dimethyloctanoate Chemical compound [Bi+3].CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O NSPSPMKCKIPQBH-UHFFFAOYSA-K 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- AVWRKZWQTYIKIY-UHFFFAOYSA-N urea-1-carboxylic acid Chemical compound NC(=O)NC(O)=O AVWRKZWQTYIKIY-UHFFFAOYSA-N 0.000 description 1
- 230000002485 urinary effect Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
- VNTDZUDTQCZFKN-UHFFFAOYSA-L zinc 2,2-dimethyloctanoate Chemical compound [Zn++].CCCCCCC(C)(C)C([O-])=O.CCCCCCC(C)(C)C([O-])=O VNTDZUDTQCZFKN-UHFFFAOYSA-L 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
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- Polyurethanes Or Polyureas (AREA)
Description
[内径保持率(%)]=100×(チューブ1の内径)/(チューブ2の内径)
[外径保持率(%)]=100×(チューブ1の外径)/(チューブ2の外径)
なお、内径保持率および外径保持率が100%に近ければ、押出成形性(押出成形における安定性)が良好であると判断する。
1,4−ビス(イソシアナトメチル)シクロヘキサン(1,4−H6XDI)の製造
(ポリイソシアネートの加水分解性塩素濃度の測定)
各1,4−ビス(イソシアナトメチル)シクロヘキサンに含有される加水分解性塩素の濃度(以下、HCと略する。)は、JIS K−1556(2000)の附属書3に記載されている加水分解性塩素の試験方法に準拠して測定した。
13C−NMR測定によるトランス/シス比が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段ホスゲン化法を加圧下で実施した。
13C−NMR測定によるトランス/シス比が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、1,4−BIC1と同様の方法にて388質量部の1,4−BIC2を得た。得られた1,4−BIC2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/シス比は41/59であった。HCは22ppmであった。
攪拌機、温度計、還流管、および、窒素導入管を備えた4つ口フラスコに、製造例1の1,4−BIC1を865質量部、製造例2の1,4−BIC2を135質量部装入し、窒素雰囲気下、室温にて1時間撹拌した。得られた1,4−BIC3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/シス比は86/14であった。HCは19ppmであった。
攪拌機、温度計、還流管および窒素導入管を備えた4つ口フラスコに、PTMEG−2(BASF社製、商品名:polyTHF2000S、数平均分子量2000、テトラヒドロフランからなるポリテトラメチレンエーテルグリコール)と、共重合PTMEG−1(旭化成せんい社製、商品名:PTXG、数平均分子量1800、テトラヒドロフランとネオペンチルグリコールとを共重合した非晶性ポリテトラメチレンエーテルグリコール)とが、それぞれ90モル%、10モル%となるように調製された高分子量ポリオールを装入し、次いで、当量比R(NCO/OH)が2.5になるように、1,4−BIC3を装入した。窒素雰囲気下、80℃にてイソシアネート基含量が5.11質量%になるまで反応させ、イソシアネート基末端ポリウレタンプレポリマー(以下、プレポリマーと略する。)(a)を得た。
高分子量ポリオールを、PTMEG−1(BASF社製、商品名:polyTHF1000S、数平均分子量1000、テトラヒドロフランからなるポリテトラメチレンエーテルグリコール)と共重合PTMEG−1とがそれぞれ20モル%、80モル%となるように調製し、また、当量比R(NCO/OH)が1.45になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(b)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ20モル%、80モル%となるように調製し、また、当量比R(NCO/OH)が2.39になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(c)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ70モル%、30モル%となるように調製し、また、当量比R(NCO/OH)が3.48になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(d)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ70モル%、30モル%となるように調製し、また、当量比R(NCO/OH)が3.84になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(e)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ80モル%、20モル%となるように調製し、また、当量比R(NCO/OH)が1.93になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(f)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ50モル%、50モル%となるように調製し、また、当量比R(NCO/OH)が2.4になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(g)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−2(保土谷化学社製、商品名:PTG−L(数平均分子量1000、テトラヒドロフランと3−メチルテトラヒドロフランとを共重合した非晶性ポリテトラメチレンエーテルグリコール)とがそれぞれ20モル%、80モル%となるように調製し、また、当量比R(NCO/OH)が2.33になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(h)を得た。
共重合PTMEG−1のみを用い、また、当量比R(NCO/OH)が1.68になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(i)を得た。
高分子量ポリオールを、PEs−OH(三井化学社製、商品名:タケラックU−2024、数平均分子量2000、アジピン酸系ポリエステルポリオール)と共重合PTMEG−1とがそれぞれ70モル%、30モル%となるように調製し、また、当量比R(NCO/OH)が2.47になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(j)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ50モル%、50モル%となるように調製し、また、当量比R(NCO/OH)が3.54になるように4,4’−メチレンビス(シクロヘキシルイソシアネート)(H12MDI)を装入した以外は、合成例1と同様の操作にて、プレポリマー(k)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ50モル%、50モル%となるように調製し、また、当量比R(NCO/OH)が2.7になるように1,3−ビス(イソシアナトメチル)シクロヘキサン(1,3−H6XDI)を装入した以外は、合成例1と同様の操作にて、プレポリマー(l)を得た。
高分子量ポリオールを、共重合PTMEG−1と共重合PTMEG−2とがそれぞれ50モル%、50モル%となるように調製し、また、当量比R(NCO/OH)が1.30になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(m)を得た。
高分子量ポリオールを、PTMEG−1と共重合PTMEG−1とがそれぞれ50モル%、50モル%となるように調製し、また、当量比R(NCO/OH)が6になるように1,4−BIC3を装入した以外は、合成例1と同様の操作にて、プレポリマー(n)を得た。
1,4−H6XDI:製造例3で得られた1,4−BIC3
PTMEG−1:BASF社製、商品名:polyTHF1000S、数平均分子量1000、テトラヒドロフランからなるポリテトラメチレンエーテルグリコール
PTMEG−2:BASF社製、商品名:polyTHF2000S、数平均分子量2000、テトラヒドロフランからなるポリテトラメチレンエーテルグリコール
PEs−OH:三井化学社製、商品名:タケラックU−2024、数平均分子量2000、アジピン酸系ポリエステルポリオール
共重合PTMEG−1:旭化成せんい社製、商品名:PTXG、数平均分子量1800、テトラヒドロフランとネオペンチルグリコールとを共重合した非晶性ポリテトラメチレンエーテルグリコール
共重合PTMEG−2:保土谷化学社製、商品名:PTG−L、数平均分子量1000、テトラヒドロフランと3−メチルテトラヒドロフランとを共重合した非晶性ポリテトラメチレンエーテルグリコール
参考例1(ポリウレタンエラストマー(A)の合成)
予め80℃に調整したプレポリマー(a)100質量部に、耐熱安定剤(商品名:イルガノックス245、BASFジャパン社製)0.3質量部、触媒としてNDB(ネオデカン酸ビスマス(シェファードケミカル社製、商品名:BiCAT−8124))500ppmをステンレス容器に入れ、高速ディスパーを使用して、800rpmの撹拌下、約2分間撹拌混合した。次いで、鎖伸長剤として予め80℃に調整した1,4−BD(1,4−ブタンジオール(三菱化学株式会社製))を、当量比R(NCO/OH)が1.01になるように添加した。
プレポリマー(b)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(B)、そのエラストマーシートおよびチューブを得た。
プレポリマー(c)を用い、また、触媒としてNDZ(ネオデカン酸亜鉛(シェファードケミカル社製、商品名:BiCAT−1365))500ppmを用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(C)、そのエラストマーシートおよびチューブを得た。
プレポリマー(d)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(D)、そのエラストマーシートおよびチューブを得た。
プレポリマー(e)を用い、また、触媒としてDBTDL(ジブチル錫ジラウレート(三共有機合成社製、商品名:スタンBL)10ppmを用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(E)、そのエラストマーシートおよびチューブを得た。
プレポリマー(f)を用い、また、触媒としてNDZr(ネオデカン酸ジルコニウム(シェファードケミカル社製、商品名:BiCAT−4130M))500ppmを用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(F)、そのエラストマーシートおよびチューブを得た。
プレポリマー(g)を用い、また、鎖伸長剤として1,4―ブタンジオールおよびネオペンチルグリコールを、それぞれ70モル%、30モル%となるように用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(G)、そのエラストマーシートおよびチューブを得た。
プレポリマー(h)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(H)、そのエラストマーシートおよびチューブを得た。
プレポリマー(i)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(I)、そのエラストマーシートおよびチューブを得た。
プレポリマー(j)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(J)、そのエラストマーシートおよびチューブを得た。
プレポリマー(k)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(K)、そのエラストマーシートおよびチューブを得た。
プレポリマー(l)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(L)、そのエラストマーシートおよびチューブを得た。
プレポリマー(m)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(M)、そのエラストマーシートおよびチューブを得た。
プレポリマー(n)を用いた以外は、参考例1と同様の配合処方および操作にて、ポリウレタンエラストマー(N)、そのエラストマーシートおよびチューブを得た。
1,4−BG:1,4−ブタンジオール
NPG:ネオペンチルグリコール
NDB:ネオデカン酸ビスマス(シェファードケミカル社製、商品名:BiCAT−8124)
NDZ:ネオデカン酸亜鉛(シェファードケミカル社製、商品名:BiCAT−1365)
NDZr:ネオデカン酸ジルコニウム(シェファードケミカル社製、商品名:BiCAT−4130M)
DBTDL:ジブチル錫ジラウレート(三共有機合成社製、商品名:スタンBL)
評価
各実施例および各比較例において得られたエラストマーシートおよびチューブを、下記する方法により評価した。その結果を表2〜4に併せて示す。
<硬度>
射出成形により得られたシートを用いて、JIS K−7311(1995)に準拠し、アスカーゴム硬度計(高分子計器社製、形式A)を用いてA硬度を測定した。
<引張強度(単位:MPa)>
射出成形により得られたシートを用いて、JIS K−7311(1995)に準拠して、23℃、55%相対湿度下で引張試験機(オリエンテック社製、型式U−4400)を用いて、シートの引張強度(単位:MPa)を測定した。
<チューブの押出成形性(単位:%)>
成形開始0.5時間後のチューブと1.5時間後のそれを長さが各々200mmとなるようにサンプリングした。それぞれのチューブの両端の外径をレーザ寸法測定器(キーエンス株式会社製、商品名LS−31000)を用いて測定し、その平均値を求めた。一方、チューブの内径は寸法測定器(株式会社アイゼン製、商品名 マスターピンゲージ)を用いて、上記した箇所を測定し、その平均値を求めた。
内径保持率(%)={(成形0.5時間後のチューブの内径)/(成形1.5時間後のチューブの内径)}×100
外径保持率(%)={(成形0.5時間後のチューブの外径)/(成形1.5時間後のチューブの外径)}×100
<チューブの耐ブロッキング性>
上記した<チューブの押出安定性>記載の条件にて、連続的にチューブを成形した。成形開始0.5時間後から1時間後に至る0.5時間、チューブを直径が約25cmの円状になるようにとぐろ状に集積していった。
○:チューブ同士が容易に剥離した。
△:チューブ同士の剥離にやや抵抗を感じた。
×:チューブ同士がくっ付いて容易に剥離できなかった。
<チューブの耐キンク性(単位:mm)>
図1が参照されるように、成形0.5時間後のチューブ(長さ30cm)の両端を持って直径50mmの輪を作った。次いで、チューブを交差させるように、チューブの両端をゆっくり引っ張っていくと、輪が楕円形となり、そのまま引っ張っていくと、楕円形の輪の頂点にキンク(折れじわ)が生じた。その時点で、チューブ同士が交差している点から折れじわが発生したチューブの点の長さ(単位:mm)を測定した。この値が小さいほど、耐キンク性が良好と判断した。
K キンク点
Claims (4)
- 1,4−ビス(イソシアナトメチル)シクロヘキサンを含有するイソシアネート成分と、ポリオール成分との反応により得られるポリウレタンエラストマーから形成され、
硬度が65Aを超過し、95A以下であり、
前記ポリオール成分が、高分子量ポリオールおよび低分子量ポリオールを含有し、
前記高分子量ポリオールが、非晶性ポリテトラメチレンエーテルグリコールを、20〜80モル%の割合で含有する
ことを特徴とする、チューブ。 - ホースであることを特徴とする、請求項1に記載のチューブ。
- ケーブルシースであることを特徴とする、請求項1または2に記載のチューブ。
- 1,4−ビス(イソシアナトメチル)シクロヘキサンを含有するイソシアネート成分と、高分子量ポリオールおよび低分子量ポリオールを含有し、前記高分子量ポリオールが、非晶性ポリテトラメチレンエーテルグリコールを、20〜80モル%の割合で含有するポリオール成分とを、
触媒として、ビスマスのカルボン酸塩、亜鉛のカルボン酸塩およびジルコニウムのカルボン酸塩からなる群から選択される少なくとも1種のカルボン酸塩の存在下において反応させることにより、ポリウレタンエラストマーを調製する工程、および、
前記ポリウレタンエラストマーからチューブを成形する工程
を備えることを特徴とする、チューブの製造方法。
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