WO2012115147A1 - ポリアミド樹脂組成物及びその製造方法並びに冷媒輸送用ホース - Google Patents
ポリアミド樹脂組成物及びその製造方法並びに冷媒輸送用ホース Download PDFInfo
- Publication number
- WO2012115147A1 WO2012115147A1 PCT/JP2012/054270 JP2012054270W WO2012115147A1 WO 2012115147 A1 WO2012115147 A1 WO 2012115147A1 JP 2012054270 W JP2012054270 W JP 2012054270W WO 2012115147 A1 WO2012115147 A1 WO 2012115147A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyamide resin
- resin composition
- producing
- kneading
- polyolefin
- Prior art date
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- 229920006122 polyamide resin Polymers 0.000 title claims abstract description 188
- 239000011342 resin composition Substances 0.000 title claims abstract description 128
- 239000003507 refrigerant Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims description 38
- 229920001971 elastomer Polymers 0.000 claims abstract description 104
- 239000000806 elastomer Substances 0.000 claims abstract description 70
- 238000004898 kneading Methods 0.000 claims abstract description 69
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 62
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 47
- 229920000098 polyolefin Polymers 0.000 claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 150000001447 alkali salts Chemical class 0.000 claims abstract description 7
- 230000006866 deterioration Effects 0.000 claims description 48
- 230000004888 barrier function Effects 0.000 claims description 44
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 42
- 239000005060 rubber Substances 0.000 claims description 34
- 239000003112 inhibitor Substances 0.000 claims description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 16
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 claims description 15
- 230000003405 preventing effect Effects 0.000 claims description 15
- 229920000642 polymer Polymers 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 11
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical group [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 10
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 10
- 229960001545 hydrotalcite Drugs 0.000 claims description 10
- 239000003963 antioxidant agent Substances 0.000 claims description 7
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 7
- 150000004692 metal hydroxides Chemical class 0.000 claims description 7
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 150000002736 metal compounds Chemical class 0.000 abstract description 28
- 239000002253 acid Substances 0.000 abstract description 19
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 229910052736 halogen Inorganic materials 0.000 abstract description 4
- 150000002367 halogens Chemical class 0.000 abstract description 4
- 150000002739 metals Chemical class 0.000 abstract description 4
- 150000004679 hydroxides Chemical class 0.000 abstract description 2
- 239000008380 degradant Substances 0.000 abstract 3
- 229910010272 inorganic material Inorganic materials 0.000 abstract 2
- 239000011147 inorganic material Substances 0.000 abstract 2
- 239000000047 product Substances 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 73
- 230000032683 aging Effects 0.000 description 19
- 238000012360 testing method Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 12
- -1 enantolactam Chemical compound 0.000 description 12
- 229920001577 copolymer Polymers 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 230000002378 acidificating effect Effects 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000010725 compressor oil Substances 0.000 description 7
- 229910052749 magnesium Inorganic materials 0.000 description 7
- 229920002943 EPDM rubber Polymers 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000010726 refrigerant oil Substances 0.000 description 6
- 239000004677 Nylon Substances 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 5
- 229920005549 butyl rubber Polymers 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 229920001778 nylon Polymers 0.000 description 5
- 229920002647 polyamide Polymers 0.000 description 5
- 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
- 229920002302 Nylon 6,6 Polymers 0.000 description 4
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 3
- 239000000391 magnesium silicate Substances 0.000 description 3
- 229910052919 magnesium silicate Inorganic materials 0.000 description 3
- 235000019792 magnesium silicate Nutrition 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- PBLZLIFKVPJDCO-UHFFFAOYSA-N 12-aminododecanoic acid Chemical compound NCCCCCCCCCCCC(O)=O PBLZLIFKVPJDCO-UHFFFAOYSA-N 0.000 description 2
- CNPURSDMOWDNOQ-UHFFFAOYSA-N 4-methoxy-7h-pyrrolo[2,3-d]pyrimidin-2-amine Chemical compound COC1=NC(N)=NC2=C1C=CN2 CNPURSDMOWDNOQ-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 150000002497 iodine compounds Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 229920003049 isoprene rubber Polymers 0.000 description 2
- 150000003951 lactams Chemical class 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
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- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
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- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
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- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 description 2
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- 230000003746 surface roughness Effects 0.000 description 2
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- GUOSQNAUYHMCRU-UHFFFAOYSA-N 11-Aminoundecanoic acid Chemical compound NCCCCCCCCCCC(O)=O GUOSQNAUYHMCRU-UHFFFAOYSA-N 0.000 description 1
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 1
- DPQHRXRAZHNGRU-UHFFFAOYSA-N 2,4,4-trimethylhexane-1,6-diamine Chemical compound NCC(C)CC(C)(C)CCN DPQHRXRAZHNGRU-UHFFFAOYSA-N 0.000 description 1
- FZZMTSNZRBFGGU-UHFFFAOYSA-N 2-chloro-7-fluoroquinazolin-4-amine Chemical compound FC1=CC=C2C(N)=NC(Cl)=NC2=C1 FZZMTSNZRBFGGU-UHFFFAOYSA-N 0.000 description 1
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical compound CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 description 1
- MBRGOFWKNLPACT-UHFFFAOYSA-N 5-methylnonane-1,9-diamine Chemical compound NCCCCC(C)CCCCN MBRGOFWKNLPACT-UHFFFAOYSA-N 0.000 description 1
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- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- QLBRROYTTDFLDX-UHFFFAOYSA-N [3-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCCC(CN)C1 QLBRROYTTDFLDX-UHFFFAOYSA-N 0.000 description 1
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 1
- OXIKYYJDTWKERT-UHFFFAOYSA-N [4-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCC(CN)CC1 OXIKYYJDTWKERT-UHFFFAOYSA-N 0.000 description 1
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 235000011037 adipic acid Nutrition 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229960002684 aminocaproic acid Drugs 0.000 description 1
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- 125000003118 aryl group Chemical group 0.000 description 1
- TZYHIGCKINZLPD-UHFFFAOYSA-N azepan-2-one;hexane-1,6-diamine;hexanedioic acid Chemical compound NCCCCCCN.O=C1CCCCCN1.OC(=O)CCCCC(O)=O TZYHIGCKINZLPD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920005557 bromobutyl Polymers 0.000 description 1
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
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- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
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- QYQADNCHXSEGJT-UHFFFAOYSA-N cyclohexane-1,1-dicarboxylate;hydron Chemical compound OC(=O)C1(C(O)=O)CCCCC1 QYQADNCHXSEGJT-UHFFFAOYSA-N 0.000 description 1
- XBZSBBLNHFMTEB-UHFFFAOYSA-N cyclohexane-1,3-dicarboxylic acid Chemical compound OC(=O)C1CCCC(C(O)=O)C1 XBZSBBLNHFMTEB-UHFFFAOYSA-N 0.000 description 1
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- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- QFTYSVGGYOXFRQ-UHFFFAOYSA-N dodecane-1,12-diamine Chemical compound NCCCCCCCCCCCCN QFTYSVGGYOXFRQ-UHFFFAOYSA-N 0.000 description 1
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- CYPPCCJJKNISFK-UHFFFAOYSA-J kaolinite Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[O-][Si](=O)O[Si]([O-])=O CYPPCCJJKNISFK-UHFFFAOYSA-J 0.000 description 1
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- 238000010030 laminating Methods 0.000 description 1
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- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
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- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
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Images
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Definitions
- the present invention relates to a polyamide resin composition suitable as a resin composition for forming a gas barrier layer of a refrigerant transport hose, a method for producing the same, and a refrigerant transport hose having a gas barrier layer made of the polyamide resin composition.
- CFCs such as HFC-134a (R-134a) have been used as refrigerants in automobile air conditioners.
- Patent Document 1 In order to improve the riding comfort of automobiles, rubber hoses with excellent vibration absorption performance are used in the piping of automobile air conditioners.
- Patent Document 1 in order to prevent leakage of the refrigerant, a polyamide resin layer having excellent gas barrier properties and excellent vibration durability such as impulse resistance is disposed on the innermost layer.
- a rubber hose in which an inner tube rubber layer is provided, a reinforcing yarn layer made of organic fibers such as PET is provided thereon, and an EPDM rubber layer having weather resistance is further provided thereon.
- Patent Document 2 discloses a refrigerant transport hose in which a polyolefin-based elastomer as a flexibility imparting agent is blended with a polyamide resin constituting the innermost gas barrier layer, thereby imparting refrigerant permeation resistance and flexibility. Is described.
- Polyamide resin may be deteriorated by CFC refrigerant or oil from compressor. Even if a polyolefin-based elastomer is blended with a polyamide resin, deterioration may not be sufficiently prevented.
- the conventional refrigerant transport hose may not have sufficient durability.
- the polyamide resin composition when an acidic component is present even in a small amount in a refrigerant of an air conditioner, the polyamide resin composition may be significantly deteriorated due to the acidic component under high temperature or high pressure actual use conditions and may not be able to be used.
- the acidic component include extreme pressure agents contained in compressor oil sealed together with the refrigerant. For this reason, depending on the type of oil used in the air conditioner and the environmental conditions, the conventional refrigerant transport hose may not be practically durable and may not be usable.
- Patent Document 3 Japanese Patent Laid-Open No. 2010-249316 describes a refrigerant transport hose that has improved durability by preventing deterioration of a gas barrier layer made of a polyamide resin composition due to refrigerant or compressor oil.
- the polyamide resin composition for forming a gas barrier layer includes one or more kinds selected from the group consisting of divalent or trivalent metal hydroxides, oxides and carbonates. A metal compound is blended at a predetermined ratio.
- Patent Document 3 Since the polyamide resin composition of Patent Document 3 is blended with the above metal compound, deterioration of the gas barrier layer made of the polyamide resin composition by the refrigerant or compressor oil is effectively suppressed or prevented (hereinafter, suppressed or prevented). This is simply referred to as “prevention”), and the durability of the refrigerant transport hose is improved.
- the metal compound blended in the polyamide resin composition is used as an acid acceptor, a halogen acceptor, etc. It is presumed that the effect of preventing deterioration of the polyamide resin composition is manifested by the function of the metal compound trapping deterioration factors such as acid components and halogen components contained in the refrigerant and oil.
- Patent Document 4 Japanese Patent Laid-Open No. 2011-6680 describes a method for producing a polyamide resin composition in which the uniform dispersibility of the metal compound in the polyamide resin composition of Patent Document 3 is improved.
- Patent Document 4 discloses a polyamide containing a polyamide resin, a polyolefin-based elastomer, and one or more metal compounds selected from the group consisting of divalent or trivalent metal hydroxides, oxides and carbonates.
- a method for producing a resin composition is described in which a metal compound and a polyolefin elastomer are kneaded, and the obtained kneaded product and a polyamide resin are kneaded.
- Patent Document 4 in a method for producing a polyamide resin composition containing a polyamide resin, a polyolefin-based elastomer, and the above metal compound, the polyolefin-based elastomer and the metal compound are previously kneaded, and the obtained kneaded product is subjected to a polyamide resin. Is kneaded to uniformly disperse the metal compound in the resin composition. Thereby, the impulse resistance of the refrigerant transport hose is improved.
- the metal compound is easily dispersed uniformly in the polyolefin elastomer. Therefore, as described in Patent Document 4, by kneading a metal compound with a polyolefin-based elastomer in advance, the metal compound is uniformly dispersed in the resulting resin composition, and a defective portion having a poor film skin that becomes a starting point of fracture is obtained. Occurrence is prevented.
- the deterioration of the polyamide resin composition due to the refrigerant transport hose is mainly due to the deterioration of the polyamide resin due to acidic components.
- the acidic component that degrades the polyamide resin composition may enter not only the polyamide resin phase but also the polyolefin elastomer phase, and may pass through the polyolefin elastomer phase and reach the polyamide resin phase.
- the metal compound dispersed in the polyolefin-based elastomer phase can capture an acidic component passing through the polyolefin-based elastomer phase and effectively prevent deterioration of the polyamide resin.
- the metal compound is mainly dispersed in the polyolefin elastomer phase.
- the gas barrier layer made of this polyamide resin composition acidic components passing through the polyolefin-based elastomer phase are captured by the metal compound and the deterioration of the polyamide resin is prevented.
- the polyamide resin composition for forming the gas barrier layer of the refrigerant transport hose is made of copper iodide, potassium iodide, etc. in order to ensure sufficient heat resistance and durability even under high temperature and high pressure conditions.
- An anti-aging agent may be blended (Patent Document 5).
- the present invention is a polyamide resin composition containing an anti-aging agent together with a metal compound described in Patent Document 3 for preventing deterioration due to an acid component, a halogen component, or the like contained in a refrigerant or oil. It aims at providing the polyamide resin composition in which the antiaging effect by an agent was fully exhibited.
- Another object of the present invention is to provide a refrigerant transport hose having a gas barrier layer made of this polyamide resin composition and having excellent durability performance.
- the present inventors have sufficiently obtained the blending effect of the anti-aging agent when the anti-aging agent is added to the polyamide resin composition containing the above-described deterioration preventing agent such as the metal compound.
- the reason why the anti-aging agent is trapped by the deterioration preventing agent is that the anti-aging effect of the anti-aging agent is hindered; the polyolefin-based elastomer and the deterioration preventing agent are kneaded.
- the present invention has been achieved on the basis of such knowledge, and the gist thereof is as follows.
- the method for producing the polyamide resin composition of the first aspect includes (a) a polyamide resin, (b) a polyolefin-based elastomer, (c) a divalent or trivalent metal hydroxide, oxide and basic salt, And a method for producing a polyamide resin composition comprising one or more deterioration inhibitors selected from the group consisting of silica-based inorganic substances, and (d) an antioxidant, wherein (c) the deterioration inhibitor and (b) Kneading step (A) for kneading polyolefin elastomer, (a) kneading step (B) for kneading polyamide resin and anti-aging agent, and kneaded product obtained in kneading step (A) And a kneading step (C) for kneading the kneaded product obtained in the kneading step (B).
- the method for producing a polyamide resin composition according to the second aspect is characterized in that, in the first aspect, the ratio of (d) the antioxidant to the polymer component in the polyamide resin composition is 0.01 to 1% by weight. To do.
- the manufacturing method of the polyamide resin composition of the third aspect is that, in the first or second aspect, the (d) anti-aging agent is copper iodide or potassium iodide, or copper iodide and potassium iodide. It is characterized by.
- the ratio of the (c) deterioration inhibitor to the polymer component in the polyamide resin composition is 1 to 15% by weight. It is characterized by this.
- the method for producing the polyamide resin composition of the fifth aspect is characterized in that, in any one of the first to fourth aspects, the (c) degradation inhibitor is hydrotalcite.
- the method for producing a polyamide resin composition according to a sixth aspect is the method according to any one of the first to fifth aspects, wherein the content of the polyolefin-based elastomer (b) in the polyamide resin composition is based on the total weight of the polyamide resin composition. It is characterized by being 10 to 45% by weight.
- the manufacturing method of the polyamide resin composition of the seventh aspect is characterized in that, in any one of the first to sixth aspects, at least a part of the (b) polyolefin-based elastomer is acid-modified.
- the polyamide resin composition according to the eighth aspect is produced by the method for producing a polyamide resin composition according to any one of the first to seventh aspects.
- the polyamide resin composition of the ninth aspect is a polyamide resin composition for forming a gas barrier layer of a refrigerant transport hose.
- a refrigerant transport hose according to a tenth aspect is a refrigerant transport hose having a gas barrier layer made of a polyamide resin composition, wherein the polyamide resin composition is the polyamide resin composition according to the eighth aspect. It is.
- the eleventh aspect of the refrigerant transport hose is characterized in that, in the tenth aspect, a reinforcing layer made of a reinforcing thread and an outer rubber layer are provided on the outer peripheral side of the gas barrier layer.
- a polyamide resin composition of the present invention (a) a polyamide resin, (b) a polyolefin-based elastomer, (c) a divalent or trivalent metal hydroxide, oxide and basic salt
- a polyamide resin composition comprising one or more deterioration inhibitors selected from the group consisting of silica-based inorganic substances and (d) an anti-aging agent, (c) a deterioration inhibitor;
- (D) Suppresses the inhibitory action of (c) anti-degradation agent on anti-aging agent, and (c) acid component and water caused by refrigerant and compressor oil by anti-degradation agent A deterioration preventing effect can be produced (d) is a polyamide resin composition capable of both fully exhibit the sufficient heat resistance imparting effect to withstand use at high temperature and high pressure conditions with antioxidants.
- the ratio of (d) anti-aging agent to the polymer component in the polyamide resin composition is preferably 0.01 to 1% by weight, and (d) anti-aging agent may be copper iodide or iodide. Potassium or copper iodide and potassium iodide are preferred.
- the proportion of the (c) deterioration inhibitor in the polyamide resin composition of the present invention is preferably 1 to 15% by weight based on the polymer component. preferable.
- the content of the (b) polyolefin elastomer in the polyamide resin composition is preferably 10 to 45% by weight in view of flexibility and durability.
- the polyolefin elastomer may be at least partially acid-modified, thereby improving compatibility with the polyamide resin.
- the polyamide resin composition of the present invention is produced by such a method for producing a polyamide resin composition of the present invention, and particularly has excellent heat resistance, gas barrier properties, and durability, and therefore, a gas barrier layer of a refrigerant transport hose. It is suitable as a forming polyamide resin composition.
- the refrigerant transport hose of the present invention has such a gas barrier layer made of the polyamide resin composition of the present invention, has sufficient heat resistance to withstand use under high-temperature and high-pressure conditions, and has a refrigerant and compressor.
- the deterioration of the gas barrier layer due to oil hardly poses a problem, and the durability performance is excellent.
- a reinforcing layer made of reinforcing yarn and an outer rubber layer are provided on the outer peripheral side of such a gas barrier layer.
- the method for producing a polyamide resin composition of the present invention comprises (a) a polyamide resin, (b) a polyolefin-based elastomer, (c) a divalent or trivalent metal hydroxide, oxide and basic salt, and In a method for producing a polyamide resin composition comprising one or more deterioration inhibitors selected from the group consisting of silica-based inorganic substances and (d) an anti-aging agent, (c) the deterioration inhibitor and (b) A kneading step (A) for kneading a polyolefin-based elastomer, (a) a kneading step (B) for kneading a polyamide resin and (d) an antioxidant, and a kneaded product obtained in the kneading step (A) A kneading step (C) for kneading the kneaded product obtained in the knea
- the polyamide resin used in the present invention is a polyamide resin mainly composed of amino acid, lactam or diamine and dicarboxylic acid.
- lactams such as ⁇ -caprolactam, enantolactam, and ⁇ -laurolactam
- amino acids such as ⁇ -aminocaproic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid, tetramethylenediamine, hexa Methylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, m-xylylenediamine, p-xylylenediamine, 1 Diamines such as 1,3-bisaminomethylcyclohexane, 1,4-bisaminomethylcyclohexane, bis-p-aminocyclohe
- Polyamide resins (nylon 6), polyhexamethylene adipamide (nylon 66), polytetramethylene adipamide (nylon 46), polyhexamethylene sebamide (nylon 610) are particularly useful as the polyamide resin used in the present invention.
- Polyundecanamide (nylon 11), polydodecanamide (nylon 12), polyhexamethylene adipamide / hexamethylene terephthalamide copolymer (nylon 66 / 6T), polycoupleramide / polyhexamethylene adipamide copolymer (Nylon 6/66) may be mentioned, and these may be used alone or in combination of two or more.
- the degree of polymerization of the polyamide is not particularly limited, and a 1% by weight sulfuric acid solution having a relative viscosity at 25 ° C. (hereinafter sometimes simply referred to as “relative viscosity”) within a range of 1.5 to 5.0. It can be used arbitrarily.
- the terminal group concentration is adjusted by adding one or more of a monocarboxylic acid compound and / or a dicarboxylic acid compound or a monoamine compound and / or a diamine compound to the polyamide at an arbitrary stage. May be.
- the polyamide resin composition of the present invention contains a polyolefin-based elastomer.
- flexibility and durability of the gas barrier layer composed of the polyamide resin composition can be imparted.
- olefin elastomer examples include ethylene / butene copolymer, EPR (ethylene-propylene copolymer), modified ethylene / butene copolymer, EEA (ethylene-ethyl acrylate copolymer), modified EEA, modified EPR, Modified EPDM (ethylene-propylene-diene terpolymer), ionomer, ⁇ -olefin copolymer, modified IR (isoprene rubber), modified SEBS (styrene-ethylene-butylene-styrene copolymer), halogenated isobutylene- Examples thereof include a paramethylstyrene copolymer, an ethylene-acrylic acid modified product, an ethylene-vinyl acetate copolymer, an acid modified product thereof, and a mixture containing them as a main component. These may be used alone or in combination of two or more.
- Polyolefin-based elastomers especially those modified with acid anhydrides such as maleic anhydride, alkyl acrylate esters such as glycidyl methacrylate, epoxies, and modified products thereof, have a fine alloy structure based on polyamide resin. It can be obtained and is preferable.
- the content in the polyamide resin composition is preferably 10 to 45% by weight, more preferably 20 to 40% by weight. If the content of the polyolefin-based elastomer in the polyamide resin composition is too large, the sea phase and the island phase are reversed in the sea-island structure described later, and the gas barrier property is remarkably lowered.
- the content of the modified elastomer in the polyamide resin composition is 20% by weight or less, for example, It is preferably 5 to 20% by weight.
- it is preferable that 40 to 100% by weight of the polyolefin-based elastomer in the polyamide resin composition is an acid-modified elastomer.
- the average acid value (acid modification rate) of the whole elastomer used for this is preferably 0.8 mg-CH 3 ONa / g or more.
- the acid value of the elastomer is preferably low in a range where a good dispersion state can be obtained, and the average acid value of the whole elastomer used is 7.5 mg. It is preferably ⁇ CH 3 ONa / g or less.
- the acid value of the modified elastomer to be used is preferably 15.0 mg-CH 3 ONa / g or less.
- the polyolefin-based elastomer by blending the polyolefin-based elastomer with the polyamide resin composition, flexibility and durability are improved, but a decrease in gas barrier properties is inevitable.
- the island phase of the elastomer is dispersed in the sea phase of the polyamide resin, and the polyamide resin is dispersed in the form of dots in the island phase of the elastomer. With such a structure, a decrease in gas barrier properties due to the blending of the elastomer can be suppressed, which is preferable.
- the ratio of the polyamide resin phase that is scattered in the island phase of the elastomer to the polyamide resin is preferably about 5 to 40% by weight. If this proportion is less than 5% by weight, it is not possible to sufficiently obtain the effect of the presence of the polyamide resin phase in the form of scattered dots in the island phase of the elastomer. There is a possibility that the polyamide resin phase becomes too small and the gas barrier property is lowered.
- the size of the elastomeric island phase and the size of the polyamide resin phase in the elastomeric island phase are approximately 0.1 to 3.0 ⁇ m for the elastomeric island phase and 0.5 ⁇ m for the polyamide resin phase. It is preferably about 2.0 ⁇ m.
- the deterioration inhibitor contained in the polyamide resin composition of the present invention is selected from divalent or trivalent metal hydroxides, oxides, basic salts such as carbonates, and silica-based inorganic substances.
- divalent or trivalent metal include divalent metals such as magnesium, iron, zinc, calcium, nickel, cobalt, and copper, and trivalent metals such as aluminum, iron, and manganese.
- basic salts such as hydroxides, oxides and carbonates of these metals include hydrotalcite, magnesium oxide, calcium hydroxide, zinc oxide, aluminum oxide, magnesium carbonate, magnesium hydroxide, Examples thereof include aluminum hydroxide, calcium oxide, calcium carbonate.
- the silica-based inorganic substance is not particularly limited as long as it is generally used for rubber compositions and resin compositions.
- Specific examples include silica, hydrous amorphous silicon dioxide, hydrous aluminum silicate, calcium silicate, magnesium silicate, silica sand, quartzite powder, kaolinite, montmorillonite, saponite, muscovite, paragonite, silica gel, etc. be able to.
- silica, hydrous amorphous silicon dioxide, hydrous aluminum silicate, calcium silicate, and magnesium silicate are preferable.
- deterioration inhibitors may be used alone or in combination of two or more in any combination and ratio.
- hydrotalcite is particularly suitable because it is considered to have an excellent acid-accepting effect.
- Hydrotalcite is a kind of naturally occurring viscous mineral, and is a double hydroxide represented by the following general formula (I).
- M 1 is Mg 2+ , Fe 2+ , Zn 2+ , Ca 2+ , Li 2+ , Ni 2+ , Co 2+ , Cu 2+, etc.
- M 2 is Al 3+ , Fe 3+ , Mn 3+, etc. ⁇ x ⁇ 2 and n ⁇ 0.
- hydrotalcite in the form containing crystal water, for example, Mg 4.5 Al 2 (OH) 13 CO 3 .3.5H 2 O, Mg 4.5 Al 2 (OH) 13 CO 3 , Mg 4 Al 2 (OH) 12 CO 3 .3.5H 2 O, Mg 6 Al 2 (OH) 16 CO 3 .4H 2 O, Mg 5 Al 2 (OH) 14 CO 3 .4H 2 O, Mg 3 Al 2 (OH) 10 CO 3 ⁇ 1.7H 2 O, Mg 3 ZnAl 2 (OH) 12 CO 3 ⁇ wH 2 O, Mg 3 ZnAl 2 (OH) 12 CO 3 and the like.
- Examples of commercially available hydrous hydrotalcite include “DHT-4A” and “DHT-6” manufactured by Kyowa Chemical Industry Co., Ltd.
- the content of the (c) deterioration preventing agent in the polyamide resin composition is preferably 1 to 15% by weight, more preferably 3 to 10% by weight, based on the polymer component in the polyamide resin composition.
- the polymer component in the polyamide resin composition refers to the total of polymer components such as (a) polyamide resin, (b) polyolefin-based elastomer, and other resins to be blended as necessary. .
- Any anti-aging agent (d) contained in the polyamide resin composition of the present invention can be used as long as it is usually used as an anti-aging agent for polyamide resin compositions.
- Inorganic anti-aging agents such as an organic anti-aging agent and an iodide compound such as copper iodide and potassium iodide can be used, and one or more of these can be used.
- an iodine compound particularly copper iodide or potassium iodide is used, or iodine It is preferable to use copper iodide and potassium iodide.
- copper iodide and potassium iodide are used in combination, and the weight ratio of [copper iodide] / [potassium iodide] is 1 / 0.5 to 1/10, particularly 1/1. ⁇ 1 / 8, particularly preferably 1 ⁇ 2 to 1/6.
- the combined use of copper iodide and potassium iodide can provide a further effect of improving heat resistance.
- the content of (d) the antioxidant in the polyamide resin composition is preferably 0.01 to 1% by weight, more preferably 0.1 to 0.8%, based on the polymer component in the polyamide resin composition. Weight%.
- the polyamide resin composition of the present invention may contain a resin component other than the polyamide resin as a resin component. In that case, 70% by weight or more of the total polymer component in the refrigerant transport hose is a polyamide resin. It is preferable to ensure gas barrier properties.
- other resin components include ethylene / vinyl alcohol resin.
- additives such as a lubricant, an antistatic agent, an antioxidant, a coloring agent, a crystal nucleating agent, a filler, a reinforcing material, a heat resistance agent, a light resistance agent and the like are also added to the polyamide resin composition of the present invention. be able to.
- the heating temperature condition in the kneading step (A) is preferably set low so as to obtain the fluidity of the elastomer in order to prevent thermal degradation of the elastomer, and also varies depending on the type of (b) polyolefin elastomer used. However, for example, in the case of Toughmer A-1050S used in the examples described later, the temperature may be about 150 to 230 ° C. In the present invention, it is preferable to knead the kneaded product of (a) the polyamide resin and (d) the anti-aging agent following the kneading of (b) the polyolefin-based elastomer and (c) the deterioration preventing agent.
- Heating is performed at a temperature at which there is no problem of thermal deterioration and fluidity is obtained, and is higher than the melting point of (a) the polyamide resin used, for example, about 10 to 60 ° C. higher than the melting point of (a) the polyamide resin.
- kneading is not particularly limited as long as (b) the polyolefin-based elastomer is sufficiently uniformly dispersed in the (c) deterioration preventing agent.
- the heating temperature condition in the kneading step (B) is preferably a temperature higher than the melting point of (a) the polyamide resin to be used, for example, a temperature condition higher by about 10 to 60 ° C. than the melting point of (a) the polyamide resin.
- the kneading is not particularly limited as long as the (a) polyamide resin is sufficiently uniformly dispersed in the (d) anti-aging agent.
- the kneading step (C) for kneading the kneaded product obtained in the kneading step (A) and the kneaded product obtained in the kneading step (B) can be performed under the same conditions as in the kneading step (B).
- the kneading step (A) only a part of the polyolefin elastomer used for the production of the composition can be kneaded, and the remainder can be kneaded in the kneading step (C). From the viewpoint of uniform dispersibility of the deterioration preventing agent, it is preferable that 70% by weight or more, preferably the entire amount, of the polyolefin-based elastomer used in the kneading step (A) is kneaded with (c) the deterioration preventing agent.
- step (A) the polyamide resin is not added, and in the kneading step (B), 70% by weight or more, preferably the total amount of the polyamide resin used for producing the composition is added. And kneading.
- these components may be added and kneaded in the kneading step (A) or added and kneaded in the kneading step (B). It may be added and kneaded in the kneading step (C) or may be added and kneaded in any step.
- polyolefin elastomer and (c) deterioration inhibitor are kneaded in advance to make a master batch
- polyamide resin and (d) anti-aging agent are kneaded in advance to make a master batch.
- kneading of the polyolefin-based elastomer and (c) the deterioration inhibitor and (k) kneading of the (a) polyamide resin and (d) the anti-aging agent, It is efficient to knead these kneaded materials.
- FIG. 1 is a perspective view for explaining a layer structure of a refrigerant transport hose 1 according to an embodiment.
- the innermost layer of the refrigerant transport hose 1 is composed of the gas barrier layer 2 made of the above-described polyamide resin composition of the present invention, and an inner rubber layer 3 is formed on the outer periphery thereof.
- the first reinforcing yarn layer 4 is sequentially formed.
- the intermediate rubber layer 5, the second reinforcing yarn layer 6, and the outer rubber layer 7 are formed.
- the inner diameter of the hose 1 is usually about 6 to 20 mm, particularly about 8 to 19 mm.
- the gas barrier layer 2 is made of the polyamide resin composition of the present invention.
- the thickness of the gas barrier layer 1 made of such a polyamide resin composition is preferably thicker from the viewpoint of gas barrier properties.
- the film thickness of the gas barrier layer 2 is preferably 50 to 400 ⁇ m, particularly preferably 100 to 300 ⁇ m.
- the inner rubber layer may be further formed as the innermost layer on the inner layer of the gas barrier layer 2 in the refrigerant transport hose 10 of FIG.
- the other configuration of the refrigerant transport hose of the present invention is not particularly limited, and the configuration of an ordinary refrigerant transport hose can be adopted as follows.
- the rubber type of the inner rubber layer 3 and the rubber type of the outer rubber layer 7 may be the same or different.
- the rubber of the intermediate rubber layer 5 is not particularly limited as long as it has good adhesion to the inner rubber layer 2 and the outer rubber layer 7.
- the thickness of the inner rubber layer 3 is preferably about 0.5 to 4 mm from the viewpoint of flexibility.
- the thickness of the intermediate rubber layer 5 is preferably about 0.1 to 0.6 mm, and the thickness of the outer rubber layer 7 is preferably about 0.5 to 2 mm.
- the first reinforcing yarn layer 4 is obtained by winding a reinforcing yarn in a spiral shape
- the second reinforcing yarn layer 6 is obtained by winding a reinforcing yarn in a spiral shape in the opposite direction to the first reinforcing yarn layer 4. is there.
- the material of the reinforcing yarn is not particularly limited as long as it is usually used.
- polyester wholly aromatic polyester, nylon, vinylon, rayon, aramid, polyarylate, polyethylene naphthalate and blended yarns thereof are used.
- Such a refrigerant transport hose according to the present invention is formed by extruding the material of the gas barrier layer 2 and the inner rubber layer 3 to a predetermined thickness on a mandrel and laminating them on the mandrel, and winding the reinforcing yarn layer 4 on the intermediate rubber layer. 5 is extruded and laminated, the reinforcing yarn layer 6 is wound, the outer rubber layer 7 is then extruded and laminated, and then vulcanized at 140 to 170 ° C. for 30 to 120 minutes.
- Examples 1 to 35 Comparative Examples 1 to 4
- each material was kneaded according to the kneading procedure shown in Tables 1-6 to produce polyamide resin compositions.
- a twin-screw kneader manufactured by Toyo Seiki Co., Ltd. was used, and kneading was performed at 230 ° C., which is a temperature higher than the melting point (220 ° C.) of the polyamide resin.
- any of the following kneading procedures I to III was adopted.
- Knead elastomer and deterioration inhibitor, nylon and anti-aging agent first, then knead elastomer with deterioration inhibitor and nylon with anti-aging agent
- Knead elastomer and anti-aging agent first, then Kneading elastomer with deterioration inhibitor, nylon and anti-aging agent 3 Kneading all materials at once
- the materials used for the production of the polyamide resin composition are as follows.
- Polyamide 6 6 nylon “1022B” manufactured by Ube Industries, Ltd. Elastomer: Mitsui Chemicals Co., Ltd. ⁇ -olefin polymer (ethylene / butene copolymer) “Toughmer A-1050S” Maleic acid-modified elastomer: maleic acid-modified ⁇ -olefin polymer (ethylene / butene copolymer) “Tuffmer MH7010” manufactured by Mitsui Chemicals, Inc. Hydrotalcite A: “Hydrotalcite DHT-4A” manufactured by Kyowa Chemical Co., Ltd.
- Composition formula Mg 4.5 Al 2 (OH) 13 CO 3 ⁇ 3.5H 2 O
- Copper iodide “Copper iodide” manufactured by Yanagishima Pharmaceutical Co., Ltd.
- Potassium iodide “Potassium iodide” manufactured by Yanagishima Pharmaceutical Co., Ltd.
- Zinc oxide “No. 3 zinc white” manufactured by Hakusuitec Co., Ltd.
- Calcium hydroxide “CLS-B” manufactured by Shiroishi Kogyo Co., Ltd.
- Magnesium hydroxide “Kyowasui Mug” manufactured by Kyowa Chemical Aluminum hydroxide: “Hijilite H31” manufactured by Showa Denko Calcium oxide: “CML # 35” manufactured by Omi Chemical Co., Ltd. Aluminum oxide: “KC-501” manufactured by Sumitomo Chemical Co., Ltd. Calcium carbonate: “Calcium Fine 200M” manufactured by Maruo Calcium Magnesium carbonate: “TT” manufactured by Tokuyama Corporation Amorphous silica: “Nipsil AQ” manufactured by Tosoh Silica Industry Co., Ltd. Porous silica: “Fine Seal” manufactured by Tokuyama Corporation Calcium silicate: “Zono Eat” manufactured by Ube Material Magnesium silicate: “Mistrone Vapor” manufactured by Nippon Mythron
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Abstract
Description
まず、本発明のポリアミド樹脂組成物の製造方法とこのポリアミド樹脂組成物の製造方法により製造される本発明のポリアミド樹脂組成物について説明する。
本発明で用いられるポリアミド樹脂は、アミノ酸、ラクタムあるいはジアミンとジカルボン酸を主たる構成成分とするポリアミド樹脂である。これらの構成成分の具体例を挙げるとε-カプロラクタム、エナントラクタム、ω-ラウロラクタムなどのラクタム、ε-アミノカプロン酸、11-アミノウンデカン酸、12-アミノドデカン酸などのアミノ酸、テトラメチレンジアミン、ヘキサメチレンジアミン、ウンデカメチレンジアミン、ドデカメチレンジアミン、2,2,4-/2,4,4-トリメチルヘキサメチレンジアミン、5-メチルノナメチレンジアミン、m-キシリレンジアミン、p-キシリレンジアミン、1,3-ビスアミノメチルシクロヘキサン、1,4-ビスアミノメチルシクロヘキサン、ビス-p-アミノシクロヘキシルメタン、ビス-p-アミノシクロヘキシルプロパン、イソホロンジアミンなどのジアミン、アジピン酸、スベリン酸、アゼライン酸、ゼバシン酸、ドデカン2酸、1,4-シクロヘキサンジカルボン酸、1,3-シクロヘキサンジカルボン酸、テレフタル酸、イソフタル酸、ナフタレンジカルボン酸、ダイマー酸などのジカルボン酸がある。これらの構成成分は単独あるいは2種以上の混合物の形で重合に供され、得られるポアミド樹脂はホモポリマー、コポリマーのいずれであっても良い。
本発明のポリアミド樹脂組成物は、ポリオレフィン系エラストマーを含む。ポリオレフィン系エラストマーを含有することにより、このポリアミド樹脂組成物で構成されるガスバリア層の柔軟性、耐久性を付与することができる。
特に、本発明では、ポリアミド樹脂組成物中のポリオレフィン系エラストマーのうちの40~100重量%を酸変性エラストマーとしたものが好ましい。
本発明のポリアミド樹脂組成物に含まれる劣化防止剤は、2価もしくは3価の金属の水酸化物、酸化物、及び炭酸塩等の塩基性塩、並びにシリカ系無機物から選ばれるものである。
ここで、2価もしくは3価の金属としては、マグネシウム、鉄、亜鉛、カルシウム、ニッケル、コバルト、銅などの2価金属、アルミニウム、鉄、マンガン等の3価金属が挙げられる。
これらの金属の水酸化物、酸化物、炭酸塩等の塩基性塩としては、具体的には、ハイドロタルサイト、酸化マグネシウム、水酸化カルシウム、酸化亜鉛、酸化アルミニウム、炭酸マグネシウム、水酸化マグネシウム、水酸化アルミニウム、酸化カルシウム、炭酸カルシウムなどが挙げられる。
M1 8-xM2 x(OH)16CO2・nH2O …(I)
本発明のポリアミド樹脂組成物に含まれる(d)老化防止剤としては、ポリアミド樹脂組成物の老化防止剤として通常用いられているものであれば、いずれも使用可能であり、フェノール系/硫黄系を併用する有機系老化防止剤や、ヨウ化銅、ヨウ化カリウムといったヨウ化化合物等の無機系老化防止剤が挙げられ、これらの1種又は2種以上を用いることができるが、特に、冷媒輸送用ホースのガスバリア層形成用のポリアミド樹脂組成物として高温高圧条件下での使用に耐える十分な耐熱性を付与するために、ヨウ素化合物、とりわけヨウ化銅又はヨウ化カリウムを用いるか、もしくはヨウ化銅及びヨウ化カリウムを用いることが好ましい。
本発明のポリアミド樹脂組成物は、樹脂成分としてポリアミド樹脂以外の樹脂成分を含んでいても良いが、その場合において、冷媒輸送用ホース中の全ポリマー成分のうちの70重量%以上がポリアミド樹脂であることが、ガスバリア性の確保のために好ましい。
前述の如く、本発明においては、ポリアミド樹脂組成物の製造に当たり、(c)劣化防止剤と(b)ポリオレフィン系エラストマーとを混練し(混練工程(A))、(a)ポリアミド樹脂と(d)老化防止剤とを混練し(混練工程(B))、混練工程(A)で得られた混練物と混練工程(B)で得られた混練物とを混練してポリマーアロイとする(混練工程(C))3工程の混練を行う。
本発明では、(b)ポリオレフィン系エラストマーと(c)劣化防止剤との混練に引き続いて(a)ポリアミド樹脂と(d)老化防止剤との混練物を混練することが好ましいことから、エラストマーの熱劣化の問題がなく、かつ流動性が得られる温度であって、用いる(a)ポリアミド樹脂の融点以上の温度、例えば(a)ポリアミド樹脂の融点よりも10~60℃程度高い温度条件で加熱して混練することが好ましい。
この混練は、(b)ポリオレフィン系エラストマー中に(c)劣化防止剤が十分に均一に分散される程度であれば良く、混練時間等には特に制限はない。
この混練は、(a)ポリアミド樹脂中に(d)老化防止剤が十分に均一に分散される程度であれば良く、混練時間等には特に制限はない。
次に、このような本発明の製造方法により製造される本発明のポリアミド樹脂組成物をガスバリア層の構成材料として用いる本発明の冷媒輸送用ホースについて、図面を参照して説明する。
ガスバリア層2は、本発明のポリアミド樹脂組成物よりなる。
従ってガスバリア層2の膜厚は、50~400μm、特に100~300μmであることが好ましい。
内層ゴム層3及び外被ゴム層7を構成するゴムとしては、一般にブチルゴム(IIR)、塩素化ブチルゴム(C1-IIR)、塩素化ポリエチレン、クロロスルホン化ポリエチレン、臭素化ブチルゴム(Br-IIR)、イソブチレン-ブロモパラメチルスチレン共重合体、EPR(エチレン-プロピレン共重合体)、EPDM(エチレン-プロピレン-ジエン三元共重合体)、NBR(アクリロニトリルブタジエンゴム)、CR(クロロプレンゴム)、水素添加NBR、アクリルゴム、エチレンアクリルゴム(AEM)、これらのゴムの2種以上のブレンド物、或いは、これらのゴムを主成分とするポリマーとのブレンド物、好ましくはブチル系ゴム、EPDM系ゴムが用いられる。これらのゴムには、通常用いられる充填剤、加工助剤、老化防止剤、加硫剤、加硫促進剤等の配合処方を適用できる。
第1補強糸層4は、補強糸をスパイラル状に巻き付けたものであり、第2補強糸層6は、この第1補強糸層4とは逆方向にスパイラル状に補強糸を巻き付けたものである。
このような本発明の冷媒輸送用ホースは、常法に従って、マンドレル上にガスバリア層2と内層ゴム層3の材料を所定の厚さに押し出して積層し、補強糸層4を巻き付け、中間ゴム層5を押し出して積層し、補強糸層6を巻きつけ、次いで外被ゴム層7を押し出して積層し、その後140~170℃で30~120分間加硫することにより製造することができる。
表1~6に示す配合にて、表1~6に示す混練手順で各材料を混練してポリアミド樹脂組成物を製造した。
混練に際しては、東洋精機社製二軸混練り機を用い、ポリアミド樹脂の融点(220℃)以上の温度である230℃にて混練りを行った。混練は以下に示す混練手順I~IIIのいずれかを採用した。
次の1)~3)の手順によって混練を行った。
1)エラストマーと劣化防止剤、ナイロンと老化防止剤を夫々先に混練りし、その後劣化防止剤入りエラストマーと老化防止剤入りナイロンを混練
2)エラストマーと劣化防止剤を先に混練りし、その後劣化防止剤入りエラストマーとナイロンと老化防止剤を混練
3)全材料を一括で混練
エラストマー:三井化学社製 α-オレフィンポリマー(エチレン・ブテン共重合体)「タフマーA-1050S」
マレイン酸変性エラストマー:三井化学社製マレイン酸変性α-オレフィンポリマー(エチレン・ブテン共重合体)「タフマーMH7010」
ハイドロタルサイトA:協和化学社製「ハイドロタルサイトDHT-4A」
組成式:Mg4.5Al2(OH)13CO3・3.5H2O
ヨウ化銅:柳島製薬株式会社製「ヨウ化銅」
ヨウ化カリウム:柳島製薬株式会社製「ヨウ化カリウム」
ハイドロタルサイト:協和化学社製「HDT-4A-2」
酸化マグネシウム:協和化学社製「キョーワマグ#30」
酸化亜鉛:ハクスイテック社製「3号亜鉛華」
水酸化カルシウム:白石工業社製「CLS-B」
水酸化マグネシウム:協和化学社製「キョーワスイマグ」
水酸化アルミニウム:昭和電工社製「ハイジライトH31」
酸化カルシウム:近江化学社製「CML#35」
酸化アルミニウム:住友化学社製「KC-501」
炭酸カルシウム:丸尾カルシウム社製「カルシウムファイン200M」
炭酸マグネシウム:トクヤマ社製「TT」
非晶質シリカ:東ソーシリカ工業社製「ニプシルAQ」
多孔質シリカ:トクヤマ社製「ファインシール」
ケイ酸カルシウム:宇部マテリアル社製「ゾノハイジ」
ケイ酸マグネシウム:日本ミストロン社製「ミストロンベーパー」
電子顕微鏡(SEM)を用い、リンタングステン酸で表面処理したポリアミド系樹脂片を観察してエラストマーの分散粒径を調べ、エラストマーの分散粒径が3μm以下をOK、3μmを超えるものをNGとした。
東洋精機社製引張り試験機を用い、以下の老化試験前後の各ポリアミド系樹脂片について、引張り速度50mm/minで伸長して破断強力を測定し、老化試験前の値に対する老化試験後の値の百分率で表記した。
東洋精機社製引張り試験機を用い、以下の老化試験前後の各ポリアミド系樹脂片について、引張り速度50mm/minで伸長して破断伸びを測定し、老化試験前の値に対する老化試験後の値の百分率で表記した。
以下のi)~vii)の手順で老化試験を行った。
i) 耐圧容器に1ccの水を入れる。
ii) 巾10×長さ50mm×厚み0.1mmサイズのポリアミド系樹脂片を入れる。
iii) ポリアルキレングリコールオイルを70cc入れる。
iv) 耐圧容器を15分冷凍した後、5分間耐圧容器を真空引きする。
v) 冷媒としてR-134aを70cc入れる。
vi) 高温槽に150℃で4週間放置する。
Vii) 容器からポリアミド系樹脂片を取出し、評価測定に供する。
東洋精機社製引張り試験機を用い、高温槽に150℃で1週間放置する耐熱老化試験前後の各ポリアミド系樹脂片について、引張り速度50mm/minで伸長して破断強力を測定し、耐熱老化試験前の値に対する耐熱老化試験後の値の百分率で表記した。
東洋精機社製引張り試験機を用い、高温槽に150℃で1週間放置する耐熱老化試験前後の各ポリアミド系樹脂片について、引張り速度50mm/minで伸長して破断伸びを測定し、耐熱老化試験前の値に対する耐熱老化試験後の値の百分率で表記した。
株式会社小坂研究所製「表面粗さ測定器サーフコーダSE-2300」を用いて、JIS B0601に準拠して中心線平均粗さを測定した。
なお、本出願は、2011年2月22日付で出願された日本特許出願(特願2011-036128)に基づいており、その全体が引用により援用される。
Claims (12)
- (a)ポリアミド樹脂と、(b)ポリオレフィン系エラストマーと、(c)2価もしくは3価の金属の水酸化物、酸化物及び塩基性塩、並びにシリカ系無機物よりなる群から選ばれる1種又は2種以上の劣化防止剤と、(d)老化防止剤とを含むポリアミド樹脂組成物を製造する方法において、
(c)劣化防止剤と(b)ポリオレフィン系エラストマーとを混練する混練工程(A)と、
(a)ポリアミド樹脂と(d)老化防止剤とを混練する混練工程(B)と、
該混練工程(A)で得られた混練物と混練工程(B)で得られた混練物とを混練する混練工程(C)と
を含むことを特徴とするポリアミド樹脂組成物の製造方法。 - 請求項1において、前記ポリアミド樹脂組成物中のポリマー成分に対する(d)老化防止剤の割合が0.01~1重量%であることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1又は2において、前記(d)老化防止剤がヨウ化銅又はヨウ化カリウムであることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1又は2において、前記(d)老化防止剤がヨウ化銅及びヨウ化カリウムであることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1ないし4のいずれか1項において、前記ポリアミド樹脂組成物中のポリマー成分に対する(c)劣化防止剤の割合が1~15重量%であることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1ないし5のいずれか1項において、前記(c)劣化防止剤がハイドロタルサイトであることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1ないし6のいずれか1項において、前記ポリアミド樹脂組成物の(b)ポリオレフィン系エラストマーの含有量がポリアミド樹脂組成物の総重量に対して10~45重量%であることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1ないし7のいずれか1項において、前記(b)ポリオレフィン系エラストマーの少なくとも一部が酸変性されていることを特徴とするポリアミド樹脂組成物の製造方法。
- 請求項1ないし8のいずれか1項に記載のポリアミド樹脂組成物の製造方法により製造されたポリアミド樹脂組成物。
- 請求項9において、冷媒輸送用ホースのガスバリア層形成用ポリアミド樹脂組成物であることを特徴とするポリアミド樹脂組成物。
- ポリアミド樹脂組成物よりなるガスバリア層を有する冷媒輸送用ホースにおいて、該ポリアミド樹脂組成物が請求項9に記載のポリアミド樹脂組成物であることを特徴とする冷媒輸送用ホース。
- 請求項11において、前記ガスバリア層の外周側に、補強糸よりなる補強層と外被ゴム層とが設けられていることを特徴とする冷媒輸送用ホース。
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