JP2023046116A - ポリウレタン樹脂の製造方法、および、ポリウレタン樹脂 - Google Patents
ポリウレタン樹脂の製造方法、および、ポリウレタン樹脂 Download PDFInfo
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- JP2023046116A JP2023046116A JP2021154828A JP2021154828A JP2023046116A JP 2023046116 A JP2023046116 A JP 2023046116A JP 2021154828 A JP2021154828 A JP 2021154828A JP 2021154828 A JP2021154828 A JP 2021154828A JP 2023046116 A JP2023046116 A JP 2023046116A
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- polyurethane resin
- prepolymer
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- hindered phenol
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- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 1
- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 description 1
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- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 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 1
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- NPAIMXWXWPJRES-UHFFFAOYSA-N butyltin(3+) Chemical compound CCCC[Sn+3] NPAIMXWXWPJRES-UHFFFAOYSA-N 0.000 description 1
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- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 229940105990 diglycerin Drugs 0.000 description 1
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- 125000005442 diisocyanate group Chemical group 0.000 description 1
- HGQSXVKHVMGQRG-UHFFFAOYSA-N dioctyltin Chemical compound CCCCCCCC[Sn]CCCCCCCC HGQSXVKHVMGQRG-UHFFFAOYSA-N 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- BRWZYZWZBMGMMG-UHFFFAOYSA-J dodecanoate tin(4+) Chemical compound [Sn+4].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O BRWZYZWZBMGMMG-UHFFFAOYSA-J 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
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- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 125000001802 myricyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000001196 nonadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-M octanoate Chemical compound CCCCCCCC([O-])=O WWZKQHOCKIZLMA-UHFFFAOYSA-M 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- HXSACZWWBYWLIS-UHFFFAOYSA-N oxadiazine-4,5,6-trione Chemical compound O=C1ON=NC(=O)C1=O HXSACZWWBYWLIS-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- YJGJRYWNNHUESM-UHFFFAOYSA-J triacetyloxystannyl acetate Chemical compound [Sn+4].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O YJGJRYWNNHUESM-UHFFFAOYSA-J 0.000 description 1
- XTTGYFREQJCEML-UHFFFAOYSA-N tributyl phosphite Chemical compound CCCCOP(OCCCC)OCCCC XTTGYFREQJCEML-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- IVIIAEVMQHEPAY-UHFFFAOYSA-N tridodecyl phosphite Chemical compound CCCCCCCCCCCCOP(OCCCCCCCCCCCC)OCCCCCCCCCCCC IVIIAEVMQHEPAY-UHFFFAOYSA-N 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- CNUJLMSKURPSHE-UHFFFAOYSA-N trioctadecyl phosphite Chemical compound CCCCCCCCCCCCCCCCCCOP(OCCCCCCCCCCCCCCCCCC)OCCCCCCCCCCCCCCCCCC CNUJLMSKURPSHE-UHFFFAOYSA-N 0.000 description 1
- ILLOBGFGKYTZRO-UHFFFAOYSA-N tris(2-ethylhexyl) phosphite Chemical compound CCCCC(CC)COP(OCC(CC)CCCC)OCC(CC)CCCC ILLOBGFGKYTZRO-UHFFFAOYSA-N 0.000 description 1
- WGKLOLBTFWFKOD-UHFFFAOYSA-N tris(2-nonylphenyl) phosphite Chemical compound CCCCCCCCCC1=CC=CC=C1OP(OC=1C(=CC=CC=1)CCCCCCCCC)OC1=CC=CC=C1CCCCCCCCC WGKLOLBTFWFKOD-UHFFFAOYSA-N 0.000 description 1
- QQBLOZGVRHAYGT-UHFFFAOYSA-N tris-decyl phosphite Chemical compound CCCCCCCCCCOP(OCCCCCCCCCC)OCCCCCCCCCC QQBLOZGVRHAYGT-UHFFFAOYSA-N 0.000 description 1
- PEXOFOFLXOCMDX-UHFFFAOYSA-N tritridecyl phosphite Chemical compound CCCCCCCCCCCCCOP(OCCCCCCCCCCCCC)OCCCCCCCCCCCCC PEXOFOFLXOCMDX-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 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
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
この方法では、まず、ポリイソシアネート成分とポリオール成分とを反応させ、イソシアネート基末端プレポリマーを含むプレポリマー組成物を調製する(プレポリマー調製工程)。
次いで、この方法では、プレポリマー組成物と鎖伸長剤とを反応させ、ポリウレタン樹脂を合成する(鎖伸長工程)。
上記のポリウレタン樹脂の製造方法では、プレポリマー調製工程および鎖伸長工程のいずれか一方または両方において、酸化防止剤が添加される。
上記のポリウレタン樹脂の製造方法で得られるポリウレタン樹脂は、優れた機械物性と優れた外観とを兼ね備える。
<ポリイソシアネート成分>
製造例1 1、4-ビス(イソシアナトメチル)シクロヘキサン
国際公開WO2019/069802号公報の製造例3の記載に準拠して、1,4-ビス(イソシアナトメチル)シクロヘキサン(1,4-H6XDI)を得た。1,4-H6XDIの純度を、ガスクロマトグラフにより測定した結果、99.9%であった。また、APHA測定による色相は、5であった。また、13C-NMR測定により測定したトランス体およびシス体比は、トランス体86モル%であり、シス体14モル%であった。
PPDI:1,4-フェニレンジイソシアネート
・PTMEG-1000:ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)1000
・PTMEG-2000:ポリテトラメチレンエーテルグリコール、数平均分子量(Mn)2000
・1,4-BD:1,4-ブタンジオール
・MOCA:3,3’-ジクロロ-4,4’-ジアミノジフェニルメタン
・DBTDL:ジブチルスズジラウレート
・Irganox1076:3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオン酸オクタデシル、上記式(2)で示される酸化防止剤、両ヒンダードフェノール構造数1、BASF製
・Irganox1010:ビス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオン酸]2,2-ビス[[[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオニル]オキシ]メチル]プロパン-1,3-ジイル、両ヒンダードフェノール構造数4、BASF製
・Irganox1035:ビス[3-[3,5-ジ(tert-ブチル)-4-ヒドロキシフェニル]プロピオン酸]チオビスエチレン、両ヒンダードフェノール構造数2、BASF製
・Irganox1135:3-(4-ヒドロキシ-3,5-ジイソプロピルフェニル)プロピオン酸オクチル、上記式(2)で示される酸化防止剤、両ヒンダードフェノール構造数1、BASF製
・Irganox245:3,6-ジオキサオクタン-1,8-ジオールビス[3-(3-t-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオネート]、BASF製
・JPP-100:テトラフェニルジプロピレングリコールジホスファイト、城北化学工業製
・アデカスタブLA-72:ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)セバケート、ADEKA社製
実施例1~10および比較例1~8
(1)プレポリマー調製工程
・プレポリマー合成工程
表1~表4に記載のポリイソシアネート成分およびポリオール成分を、窒素雰囲気下、イソシアネート基濃度(プレポリマー合成工程後のイソシアネート基濃度)が表1~表4に記載の値に至るまで反応させた。
上記プレポリマー合成工程の反応生成液に、プレポリマー合成工程で使用されたポリイソシアネート成分と同種のイソシアネートモノマーを、添加した。
プレポリマー組成物100質量部に対して、ジブチルスズジラウレート(ウレタン化触媒、DBTDLを、0.03質量部添加し、さらに、必要に応じて、表1~表4に記載の処方で、光安定剤を添加した。また、プレポリマー組成物を60℃に予熱した。また、鎖伸長剤を40℃に予熱した。
(1)プレポリマー調製工程
表5に記載のポリイソシアネート成分およびポリオール成分を、窒素雰囲気下、イソシアネート基濃度(プレポリマー合成工程後のイソシアネート基濃度)が表5に記載の値に至るまで、反応させた。
プレポリマー組成物100質量部に対して、ジブチルスズジラウレート(ウレタン化触媒、DBTDLを、0.03質量部添加し、さらに、必要に応じて、表5に記載の処方で、光安定剤を添加した。また、プレポリマー組成物を60℃に予熱した。また、鎖伸長剤を40℃に予熱した。
<ポリウレタン樹脂(注型ポリウレタンエラストマー>
ポリウレタン樹脂のショアA硬度およびショアD硬度を、JIS K 7312(1996年)に準拠して測定した。
ポリウレタン樹脂の引張特性を、万能引張試験機(インテスコ社製 205N)により、JIS K 7312(1996年)に準拠して測定した。すなわち、ポリウレタン樹脂を切断し、3号ダンベル試験片を得た。そして、引張速度500mm/分の条件で、100%~300%モジュラス(MPa)、引張強度(MPa)および伸び(破断伸び、%)を測定した。
ポリウレタン樹脂の圧縮永久歪を、JIS K 7312(1996年)に準拠して測定した。
ポリウレタン樹脂の耐摩耗性を、以下の方法で評価した。すなわち、ポリウレタン樹脂の表面を、テーバー摩耗試験機(東洋精機製作所製)、摩耗輪H-22を用いて、荷重1kg、回転速度60rpmおよび1000回転の条件で摩耗し、試験前後の質量差を測定した。なお、質量が少ないものほど、耐摩耗性が良好であるとして評価した。
色彩色素計(ミノルタミノルタ社製、モデル:CR-200)を用いて、ポリウレタン樹脂の表面の黄色度合いを測定した。また、L*a*b*色空間において、黄度(b*値)を測定した。
2点:5≦b*<7
3点:3≦b*<5
4点:1≦b*<3
5点:b*<1
ポリウレタン樹脂の伸び保持率を、万能引張試験機(インテスコ社製 205N)により、JIS K 7312(1996年)に準拠して測定した。すなわち、ポリウレタン樹脂を切断し、3号ダンベル試験片を得た。そして、引張速度500mm/分の条件で、伸び(破断伸び、%)を測定した。
伸び保持率(%)=[耐熱試験後の伸び(%)/耐熱試験前の伸び(%)]×100
2点: 20%<伸び保持率≦40%
3点: 40%<伸び保持率≦60%
4点: 60%<伸び保持率≦80%
5点: 80%<伸び保持率
Claims (5)
- ビス(イソシアナトメチル)シクロヘキサンを含むポリイソシアネート成分と、マクロポリオールを含むポリオール成分とを、ポリオール成分中の水酸基に対するポリイソシアネート成分中のイソシアネート基の当量比(NCO/OH)が1.0を超過する割合で反応させ、イソシアネート基末端プレポリマーを含むプレポリマー組成物を得るプレポリマー調製工程と、
前記プレポリマー組成物と鎖伸長剤とを反応させ、ポリウレタン樹脂を合成する鎖伸長工程とを備え、
前記プレポリマー調製工程および/または前記鎖伸長工程において、酸化防止剤が添加され、
前記酸化防止剤が、下記式(1)で示される構造を有するヒンダードフェノール系酸化防止剤と、亜リン酸系酸化防止剤とを含み、
前記ヒンダードフェノール系酸化防止剤の割合が、前記プレポリマー組成物100質量部に対して、0.30質量部以上1.00質量部以下であり、
前記鎖伸長工程において、
前記プレポリマー組成物と前記鎖伸長剤との反応温度が、120℃以上140℃以下である、ポリウレタン樹脂の製造方法。
(式中、R1およびR2は、同一または相異なって、炭素数3~6の1価の分岐鎖状炭化水素基を示す。) - 前記ヒンダードフェノール系酸化防止剤が、前記式(1)で示される構造を、1分子中に1つ有する、請求項1に記載のポリウレタン樹脂の製造方法。
- 前記式(2)におけるR4が、炭素数10~20の1価の炭化水素基を示す、請求項3に記載のポリウレタン樹脂の製造方法。
- JIS K 7312(1996年)に準拠して測定される破断伸びが500%以上であり、
JIS K 7312(1996年)に準拠して測定される圧縮永久歪が30%未満であり、
荷重1kg、回転速度60rpmおよび1000回転で測定されるテーバー摩耗量が、100g未満であり、
400時間紫外線照射後に測定されるb*値が5未満であり、
110℃で800時間加熱した後に測定される前記破断伸びが、前記加熱の前に測定される前記破断伸びに対して、60%を超過している、ポリウレタン樹脂。
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