JP2017141352A - Friction material composition, friction material and friction member using the friction material composition - Google Patents
Friction material composition, friction material and friction member using the friction material composition Download PDFInfo
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- JP2017141352A JP2017141352A JP2016023383A JP2016023383A JP2017141352A JP 2017141352 A JP2017141352 A JP 2017141352A JP 2016023383 A JP2016023383 A JP 2016023383A JP 2016023383 A JP2016023383 A JP 2016023383A JP 2017141352 A JP2017141352 A JP 2017141352A
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- friction material
- friction
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- copper
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- 239000002783 friction material Substances 0.000 title claims abstract description 113
- 239000000203 mixture Substances 0.000 title claims abstract description 61
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052802 copper Inorganic materials 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 239000011256 inorganic filler Substances 0.000 claims abstract description 18
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 229910052976 metal sulfide Inorganic materials 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000012766 organic filler Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 13
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 17
- 239000005011 phenolic resin Substances 0.000 description 14
- 150000002989 phenols Chemical class 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000012784 inorganic fiber Substances 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000003607 modifier Substances 0.000 description 4
- 244000226021 Anacardium occidentale Species 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 235000020226 cashew nut Nutrition 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- -1 titanate compound Chemical class 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 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
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002557 mineral fiber Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical compound [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 0.000 description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 229910052946 acanthite Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 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
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229940007424 antimony trisulfide Drugs 0.000 description 1
- NVWBARWTDVQPJD-UHFFFAOYSA-N antimony(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[Sb+3].[Sb+3] NVWBARWTDVQPJD-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 229910052454 barium strontium titanate Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910001382 calcium hypophosphite Inorganic materials 0.000 description 1
- 229940064002 calcium hypophosphite Drugs 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- NNLOHLDVJGPUFR-UHFFFAOYSA-L calcium;3,4,5,6-tetrahydroxy-2-oxohexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(=O)C([O-])=O.OCC(O)C(O)C(O)C(=O)C([O-])=O NNLOHLDVJGPUFR-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- MMXSKTNPRXHINM-UHFFFAOYSA-N cerium(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[Ce+3].[Ce+3] MMXSKTNPRXHINM-UHFFFAOYSA-N 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- IPJKJLXEVHOKSE-UHFFFAOYSA-L manganese dihydroxide Chemical compound [OH-].[OH-].[Mn+2] IPJKJLXEVHOKSE-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 1
- 229940056910 silver sulfide Drugs 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005211 surface analysis Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- CNALVHVMBXLLIY-IUCAKERBSA-N tert-butyl n-[(3s,5s)-5-methylpiperidin-3-yl]carbamate Chemical compound C[C@@H]1CNC[C@@H](NC(=O)OC(C)(C)C)C1 CNALVHVMBXLLIY-IUCAKERBSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- Braking Arrangements (AREA)
Abstract
Description
本発明は、自動車等の制動に用いられるディスクブレーキパッド等の摩擦材に適した摩擦材組成物及び摩擦材組成物を用いた摩擦材に関する。 The present invention relates to a friction material composition suitable for a friction material such as a disc brake pad used for braking an automobile or the like, and a friction material using the friction material composition.
自動車等には、その制動のためにディスクブレーキパッド、ブレーキライニング等の摩擦材が使用されている。摩擦材は、ディスクロータ、ブレーキドラム等の対面材と摩擦することにより、制動の役割を果たしている。そのため、摩擦材には、良好な摩擦係数、耐摩耗性（摩擦材の寿命が長いこと）、強度、音振性（ブレーキ鳴きや異音が発生しにくいこと）等が要求される。摩擦係数は車速、減速度やブレーキ温度によらず安定であることが要求される。 In automobiles and the like, friction materials such as disc brake pads and brake linings are used for braking. The friction material plays a role of braking by friction with facing materials such as a disc rotor and a brake drum. For this reason, the friction material is required to have a good coefficient of friction, wear resistance (the friction material has a long life), strength, sound vibration (the brake noise and abnormal noise are less likely to occur), and the like. The friction coefficient is required to be stable regardless of the vehicle speed, deceleration and brake temperature.
また近年では、摩擦材中に使用される銅が、ブレーキの摩耗粉として飛散し、河川、湖や海洋汚染等の原因と考えられており、使用を制限する動きが高まっている。銅は繊維や粉末の形態で摩擦材に配合され、熱伝導率の付与や耐摩耗性改善に有効な成分である。銅を含有しない組成においては、熱伝導率が低下するため高温での制動時に摩擦界面の熱が拡散せずに、摩擦材の摩耗量の増大や不均一な温度上昇が原因のブレーキ振動の発生などが増加するといった問題があった。 In recent years, copper used in friction materials is scattered as brake powder and is considered to cause rivers, lakes, marine pollution, and the like. Copper is blended into the friction material in the form of fibers and powders, and is an effective component for imparting thermal conductivity and improving wear resistance. In the composition that does not contain copper, the thermal conductivity decreases, so the heat at the friction interface does not diffuse during braking at high temperatures, and the occurrence of brake vibration due to increased friction material wear and uneven temperature rise There was a problem such as increasing.
このような銅の使用を制限する動きの中、銅を含有しない組成において、高温での摩擦特性を向上する方策として、複数の凸部形状を有するチタン酸化合物の少なくとも１種と、生体溶解性無機繊維とを含有する摩擦材（特許文献１）や特定量の結合材、有機繊維、金属硫化物系潤滑材、炭素質系潤滑材、チタン酸塩、マイルド／ハードアブレシブ、有機摩擦調整剤、ｐＨ調整剤を含有する摩擦材（特許文献２）が提案されている。 In a movement that restricts the use of copper, in a composition that does not contain copper, as a measure for improving friction characteristics at high temperature, at least one titanate compound having a plurality of convex shapes, and biosolubility Friction material containing inorganic fiber (Patent Document 1), specific amount of binder, organic fiber, metal sulfide lubricant, carbonaceous lubricant, titanate, mild / hard abrasive, organic friction modifier, A friction material containing a pH adjuster (Patent Document 2) has been proposed.
特許文献１，２は何れも銅を含有しない組成において、高温での摩擦特性の向上を図ったものであるが、これらで提案の摩擦材は、摩擦材とディスクローターの摩耗量の低減効果は未だ充分とはいえない。 Patent Documents 1 and 2 are compositions that do not contain copper, and are intended to improve friction characteristics at high temperatures. However, the proposed friction material is effective in reducing the wear amount of the friction material and the disk rotor. Still not enough.
本発明は、上記事情を鑑みなされたもので、高温の摩耗特性が悪化するような、銅を含有しない、又は銅を含有する場合でも含有量が０．５質量％以下の摩擦材において、高い耐摩耗特性を示す摩擦材組成物を得ることを課題とする。 The present invention has been made in view of the above circumstances, and in a friction material having a content of 0.5% by mass or less even when copper is not contained or copper is not contained, such that high-temperature wear characteristics deteriorate. An object is to obtain a friction material composition exhibiting wear resistance.
本発明者らは、摩擦材の耐摩耗性の向上を図るにあたり、摩擦調整材として無機充填材の一種である硫黄化合物に着目して検討を行った。摩擦材の耐摩耗性を高めるため、摩擦材組成物に潤滑剤として機能する金属硫化物を含有させることは、古くから行われている。しかしながら、銅を含有しない、または銅を含有する場合でも０．５質量％とごく僅かしか含有しない摩擦材においては、金属硫化物を含有させた摩擦材において、異常摩耗が発生することがわかった。この異常摩耗の原因につき、究明したところ、制動時の発熱で金属硫化物が分解して生成した硫黄が相手材となるディスクロータ表面でＦｅＳＯ4を生成し、これが異常摩耗の原因となることを見出した。このことからディスクロータ表面にＦｅＳＯ4を生成しないようにすれば異常摩耗を防止できると考え、種々の検討を行い、摩擦材組成物に還元剤を含有させることでＦｅＳＯ4の生成を防止できることを見出した。 In order to improve the wear resistance of the friction material, the present inventors have studied focusing on a sulfur compound which is a kind of inorganic filler as a friction modifier. In order to improve the wear resistance of the friction material, it has been practiced for a long time to contain a metal sulfide functioning as a lubricant in the friction material composition. However, it was found that in the friction material containing no copper or containing only a small amount of 0.5% by mass even when containing copper, abnormal wear occurs in the friction material containing metal sulfide. . As a result of investigating the cause of this abnormal wear, it was found that the sulfur produced by the decomposition of metal sulfide due to the heat generated during braking produced FeSO 4 on the disk rotor surface, which is the counterpart material, and this caused abnormal wear. I found it. From this, it is considered that abnormal wear can be prevented by preventing generation of FeSO 4 on the surface of the disk rotor, and various studies have been carried out, and the formation of FeSO 4 can be prevented by including a reducing agent in the friction material composition. I found it.
本発明はこれらの知見からなるものであり、具体的に、下記の通りである。
（１）結合剤、有機充填材、無機充填材、及び繊維基材を含む摩擦材組成物であって、該摩擦材組成物中に元素としての銅を含まない、又は銅の含有量が銅元素として０．５質量%以下であり、前記無機充填材として金属硫化物を含有するとともに、前記無機充填材として還元剤を含有する摩擦材組成物。
（２）前記還元剤の標準電極電位が−０．２Ｖ以下であることを特徴とする請求項１記載の摩擦材組成物。
（３）前記還元剤の含有量が含硫黄化合物に対するモル比で、０．３以上、且つ２．８以下である（１）又は（２）に記載の摩擦材組成物。
（４）（１）〜（３）のいずれかに記載の摩擦材組成物を成型してなる摩擦材。
（５）（１）〜（４）のいずれか記載の摩擦材組成物を成型してなる摩擦材と裏金とを用いて成型される摩擦部材。
The present invention comprises these findings, and is specifically as follows.
(1) A friction material composition including a binder, an organic filler, an inorganic filler, and a fiber base material, wherein the friction material composition does not contain copper as an element, or the copper content is copper. A friction material composition containing 0.5% by mass or less as an element, containing a metal sulfide as the inorganic filler, and containing a reducing agent as the inorganic filler.
(2) The friction material composition according to claim 1, wherein the standard electrode potential of the reducing agent is -0.2 V or less.
(3) The friction material composition according to (1) or (2), wherein the content of the reducing agent is 0.3 or more and 2.8 or less in terms of a molar ratio to the sulfur-containing compound.
(4) A friction material formed by molding the friction material composition according to any one of (1) to (3).
(5) A friction member molded using a friction material obtained by molding the friction material composition according to any one of (1) to (4) and a back metal.
本発明によれば、自動車用ディスクブレーキパッド等の摩擦材に用いた際に、環境負荷の高い銅を用いることなく、高温制動における摩擦材及びディスクロータの摩耗量が少ない摩擦材組成物、摩擦材及び摩擦部材を提供することができる。 According to the present invention, when used for a friction material such as a disk brake pad for an automobile, a friction material composition, a friction material with a small amount of wear of the friction material and the disk rotor in high-temperature braking without using copper with high environmental load. Materials and friction members can be provided.
以下、本発明の摩擦材組成物、これを用いた摩擦材及び摩擦部材について詳述する。なお、本発明の摩擦材組成物は、アスベストを含まない、いわゆるノンアスベスト摩擦材組成物である。 Hereinafter, the friction material composition of the present invention, the friction material using the same, and the friction member will be described in detail. The friction material composition of the present invention is a so-called non-asbestos friction material composition that does not contain asbestos.
［摩擦材組成物］
本発明の摩擦材組成物は、銅を含有しない、または銅を含有する場合でも０．５質量％以下と極少量である摩擦材組成物である。このため、自動車用のブレーキパッドとして使用しても、環境中に排出される銅量が極微量であるため環境汚染を防止できる。
[Friction material composition]
The friction material composition of the present invention is a friction material composition that does not contain copper or is a very small amount of 0.5% by mass or less even when copper is contained. For this reason, even if it uses as a brake pad for motor vehicles, since the amount of copper discharged | emitted in an environment is very trace amount, environmental pollution can be prevented.
（金属硫化物）
金属硫化物は、無機充填材のひとつであり、潤滑作用があるため、摩擦調整材として、相手材となるロータと摩擦材の摩耗を防止する目的で添加されるものである。本発明の摩擦材用組成物は、通常、摩擦材に用いられる含硫黄化合物であれば特に制限はない。
(Metal sulfide)
A metal sulfide is one of inorganic fillers and has a lubricating action, and therefore is added as a friction adjusting material for the purpose of preventing wear of the rotor and the friction material as counterpart materials. If the composition for friction materials of this invention is a sulfur-containing compound normally used for a friction material, there will be no restriction | limiting in particular.
上記金属硫化物としては、例えば、硫化錫、硫化ビスマス、二硫化モリブデン、硫化鉄、三硫化アンチモン、硫化亜鉛、二硫化タングステン、硫化銀、硫化セリウムなどを用いることができ、これらを単独で又は二種類以上を組み合わせて使用することができる。 As the metal sulfide, for example, tin sulfide, bismuth sulfide, molybdenum disulfide, iron sulfide, antimony trisulfide, zinc sulfide, tungsten disulfide, silver sulfide, cerium sulfide and the like can be used alone or in combination. Two or more types can be used in combination.
（還元剤）
上記のとおり、銅を含まない、または銅を含む場合でも０．５質量％以下と極微量な場合、上記の金属硫化物が分解して相手材となるディスクロータ表面にＦｅＳＯ4が生成し異常摩耗の原因となる。本発明の摩擦材組成物においては、金属硫化物とともに、還元剤を含有させることで、ディスクロータ表面のＦｅＳＯ4の生成を防止して異常摩耗の発生を防止する。このため、金属硫化物の持つ潤滑作用が有効に発揮されて摩擦材の耐摩耗性の向上に寄与する。
(Reducing agent)
As described above, even when copper is not contained or is contained in an extremely small amount of 0.5% by mass or less, FeSO 4 is formed on the disk rotor surface as a counterpart material due to decomposition of the above metal sulfide, which is abnormal. Cause wear. In the friction material composition of the present invention, by containing a reducing agent together with the metal sulfide, the generation of FeSO 4 on the surface of the disk rotor is prevented and the occurrence of abnormal wear is prevented. For this reason, the lubricating action of the metal sulfide is effectively exhibited and contributes to the improvement of the wear resistance of the friction material.
本発明の摩擦材組成物に含まれる還元剤は、標準電極電位が−０．２Ｖ以下であることが好ましい。標準電極電位が−０．２Ｖより大きいと、高温制動における摩擦材及びディスクロータの摩耗量を低減しにくくなる傾向にある。標準電極電位が−０．４Ｖ以下であることが好ましく、−２．０Ｖ以下であることがさらに好ましい。なお、標準電極電位の測定はＪＩＳ規格のＫ０１２２に規定の方法により行う。 The reducing agent contained in the friction material composition of the present invention preferably has a standard electrode potential of −0.2 V or less. If the standard electrode potential is greater than -0.2 V, the wear amount of the friction material and the disk rotor during high-temperature braking tends to be difficult to reduce. The standard electrode potential is preferably −0.4 V or less, and more preferably −2.0 V or less. The standard electrode potential is measured by the method defined in JIS standard K0122.
還元剤としては、前記条件を満たしていれば特に制限はなく、例えば水酸化アルミニウム、水酸化マグネシウム、水酸化コバルト、水酸化クロム、水酸化鉄、水酸化マンガン、水酸化ニッケル、次亜リン酸カルシウム、次亜リン酸ナトリウム、メタバナジン酸アンモニウム、塩化アンモニウム、チタン酸バリウム、チタン酸ストロンチウム、塩化スズなどが挙げられる。 The reducing agent is not particularly limited as long as the above conditions are satisfied. For example, aluminum hydroxide, magnesium hydroxide, cobalt hydroxide, chromium hydroxide, iron hydroxide, manganese hydroxide, nickel hydroxide, calcium hypophosphite, Examples thereof include sodium hypophosphite, ammonium metavanadate, ammonium chloride, barium titanate, strontium titanate, and tin chloride.
前記還元剤の含有量は含硫黄化合物に対するモル比で、０．３以上、且つ２．８以下であることが好ましく、等モル比であることがより好ましい。モル比が０．３未満であると高温制動における摩擦材及びディスクロータの摩耗量の増大を抑制することが不十分であり、２．８を超えるとやはり高温制動における摩擦材及びディスクロータの摩耗量の増大を抑制することが不十分となる。 The content of the reducing agent is preferably 0.3 or more and 2.8 or less, more preferably an equimolar ratio in terms of a molar ratio to the sulfur-containing compound. If the molar ratio is less than 0.3, it is insufficient to suppress an increase in the amount of wear of the friction material and the disk rotor during high temperature braking. If the molar ratio exceeds 2.8, the wear of the friction material and the disk rotor during high temperature braking is also insufficient. It becomes insufficient to suppress the increase in the amount.
（結合材）
結合剤は、摩擦材用組成物に含まれる有機充填材、無機充填材及び繊維基材などを一体化し、強度を与えるものである。本発明の摩擦材用組成物に含まれる結合材としては特に制限は無く、通常、摩擦材の結合材として用いられる熱硬化性樹脂を用いることができる。
(Binder)
The binder integrates an organic filler, an inorganic filler, a fiber base material, and the like included in the friction material composition to give strength. There is no restriction | limiting in particular as a binder contained in the composition for friction materials of this invention, Usually, the thermosetting resin used as a binder of a friction material can be used.
上記熱硬化性樹脂としては、例えば、フェノール樹脂；アクリルエラストマー分散フェノール樹脂及びシリコーンエラストマー分散フェノール樹脂などの各種エラストマー分散フェノール樹脂；アクリル変性フェノール樹脂、シリコーン変性フェノール樹脂、カシュー変性フェノール樹脂、エポキシ変性フェノール樹脂及びアルキルベンゼン変性フェノール樹脂などの各種変性フェノール樹脂などが挙げられ、これらを単独で又は２種類以上を組み合わせて使用することができる。特に、良好な耐熱性、成形性及び摩擦係数を与えることから、フェノール樹脂、アクリル変性フェノール樹脂、シリコーン変性フェノール樹脂、アルキルベンゼン変性フェノール樹脂を用いることが好ましい。 Examples of the thermosetting resin include phenol resins; various elastomer-dispersed phenol resins such as acrylic elastomer-dispersed phenol resins and silicone elastomer-dispersed phenol resins; acrylic-modified phenol resins, silicone-modified phenol resins, cashew-modified phenol resins, and epoxy-modified phenols. Various modified phenol resins such as resins and alkylbenzene-modified phenol resins can be used, and these can be used alone or in combination of two or more. In particular, it is preferable to use a phenol resin, an acrylic-modified phenol resin, a silicone-modified phenol resin, or an alkylbenzene-modified phenol resin because good heat resistance, moldability, and friction coefficient are given.
本発明の摩擦材組成物中における、結合材の含有量は、５〜２０質量％であることが好ましく、５〜１０質量％であることがより好ましい。結合材の含有量を５〜２０質量％の範囲とすることで、摩擦材の強度低下をより抑制でき、また、摩擦材の気孔率が減少し、弾性率が高くなることによる鳴きなどの音振性能悪化をより抑制できる。 The content of the binder in the friction material composition of the present invention is preferably 5 to 20% by mass, and more preferably 5 to 10% by mass. By setting the content of the binder in the range of 5 to 20% by mass, it is possible to further suppress the strength reduction of the friction material, and to reduce the porosity of the friction material and to make noise such as squeal due to the increase in the elastic modulus. Vibration performance deterioration can be further suppressed.
(有機充填剤)
有機充填材は、摩擦材の音振性能や耐摩耗性などを向上させるための摩擦調整剤として含まれるものである。本発明の摩擦材組成物に含まれる有機充填材としては、上記性能を発揮できるものであれば特に制限はなく、通常、有機充填材として用いられる、カシューダストやゴム成分などを用いることができる。
(Organic filler)
The organic filler is included as a friction modifier for improving the sound vibration performance and wear resistance of the friction material. The organic filler contained in the friction material composition of the present invention is not particularly limited as long as it can exhibit the above performance, and cashew dust, rubber components, etc., which are usually used as an organic filler can be used. .
上記カシューダストは、カシューナッツシェルオイルを硬化させたものを粉砕して得られる、通常、摩擦材に用いられるものであればよい。 The cashew dust is not particularly limited as long as it is obtained by pulverizing a hardened cashew nut shell oil and is usually used for a friction material.
上記ゴム成分としては、例えば、タイヤゴム、アクリルゴム、イソプレンゴム、ＮＢＲ（ニトリルブタジエンゴム）、ＳＢＲ（スチレンブタジエンゴム）、塩素化ブチルゴム、ブチルゴム、シリコーンゴム、などが挙げられ、これらを単独で又は２種類以上を組み合わせて使用される。 Examples of the rubber component include tire rubber, acrylic rubber, isoprene rubber, NBR (nitrile butadiene rubber), SBR (styrene butadiene rubber), chlorinated butyl rubber, butyl rubber, silicone rubber, and the like. Used in combination of more than one type.
本発明の摩擦材組成物中における、有機充填材の含有量は、１〜２０質量％であることが好ましく、１〜１０質量％であることがより好ましく、３〜８質量％であることが特に好ましい。有機充填材の含有量を１〜２０質量％の範囲とすることで、摩擦材の弾性率が高くなること、鳴きなどの音振性能の悪化を避けることができ、また耐熱性の悪化、熱履歴による強度低下を避けることができる。 The content of the organic filler in the friction material composition of the present invention is preferably 1 to 20% by mass, more preferably 1 to 10% by mass, and 3 to 8% by mass. Particularly preferred. By setting the content of the organic filler in the range of 1 to 20% by mass, the elastic modulus of the friction material is increased, deterioration of sound vibration performance such as squealing can be avoided, heat resistance deterioration, heat It is possible to avoid a decrease in strength due to history.
（無機充填材）
無機充填材は、摩擦材の耐熱性の悪化を避けるためや、耐摩耗性を向上させるため、摩擦係数を向上する目的で添加される摩擦調整剤として含まれるものである。本発明の摩擦材組成物は、上記の金属硫化物及び還元剤以外の、通常、摩擦材に用いられる無機充填剤を使用することができる。
(Inorganic filler)
The inorganic filler is included as a friction modifier that is added for the purpose of improving the friction coefficient in order to avoid deterioration of the heat resistance of the friction material or to improve the wear resistance. In the friction material composition of the present invention, inorganic fillers usually used for friction materials other than the metal sulfides and reducing agents described above can be used.
上記無機充填材としては、例えば、水酸化カルシウム、酸化カルシウム、炭酸ナトリウム、硫酸バリウム、コークス、マイカ、バーミキュライト、硫酸カルシウム、タルク、クレー、ゼオライト、ムライト、クロマイト、酸化チタン、酸化マグネシウム、シリカ、ドロマイト、炭酸カルシウム、炭酸マグネシウム、粒状又は板状のチタン酸塩、珪酸ジルコニウム、γアルミナ、二酸化マンガン、酸化亜鉛、四三酸化鉄、酸化セリウム、ジルコニアなどを用いることができ、これらを単独で又は２種類以上を組み合わせて使用することができる。チタン酸ナトリウム、人造黒鉛、天然黒鉛などを用いることができる。 Examples of the inorganic filler include calcium hydroxide, calcium oxide, sodium carbonate, barium sulfate, coke, mica, vermiculite, calcium sulfate, talc, clay, zeolite, mullite, chromite, titanium oxide, magnesium oxide, silica, and dolomite. , Calcium carbonate, magnesium carbonate, granular or plate-like titanate, zirconium silicate, γ-alumina, manganese dioxide, zinc oxide, triiron tetroxide, cerium oxide, zirconia, and the like can be used alone or 2 More than one type can be used in combination. Sodium titanate, artificial graphite, natural graphite and the like can be used.
本発明の摩擦材組成物中における、無機充填材の含有量は、３０〜８０質量％であることが好ましく、４０〜７０質量％であることがより好ましく、５０〜６０質量％であることが特に好ましい。無機充填材の含有量を３０〜８０質量％の範囲とすることで、耐熱性の悪化を避けることができ、摩擦材のその他成分の含有量バランスの点でも好ましい。 The content of the inorganic filler in the friction material composition of the present invention is preferably 30 to 80% by mass, more preferably 40 to 70% by mass, and 50 to 60% by mass. Particularly preferred. By making content of an inorganic filler into the range of 30-80 mass%, deterioration of heat resistance can be avoided and it is preferable also at the point of content balance of the other component of a friction material.
（繊維基材）
繊維基材は、摩擦材において補強作用を示すものである。
(Fiber base)
The fiber base material exhibits a reinforcing action in the friction material.
本発明の摩擦材組成物は、通常、繊維基材として用いられる、無機繊維、金属繊維、有機繊維、炭素系繊維などを用いることができ、これらを単独で又は二種類以上を組み合わせて使用することができる。 In the friction material composition of the present invention, inorganic fibers, metal fibers, organic fibers, carbon fibers, etc., which are usually used as fiber base materials, can be used, and these are used alone or in combination of two or more. be able to.
上記無機繊維としては、セラミック繊維、生分解性セラミック繊維、鉱物繊維、ガラス繊維、シリケート繊維などを用いることができ、１種又は２種以上を組み合わせて用いることができる。これら、無機繊維の中では、ＳｉＯ2、Ａｌ2Ｏ3、ＣａＯ、ＭｇＯ、ＦｅＯ、Ｎａ2Ｏなどを任意の組み合わせで含有した生分解性鉱物繊維が好ましく、市販品としてはLAPINUS FIBERS B.V製のRoxulシリーズなどが挙げられる。 As said inorganic fiber, a ceramic fiber, a biodegradable ceramic fiber, a mineral fiber, glass fiber, a silicate fiber etc. can be used, It can use 1 type or in combination of 2 or more types. Among these inorganic fibers, biodegradable mineral fibers containing SiO 2 , Al 2 O 3 , CaO, MgO, FeO, Na 2 O and the like in any combination are preferable, and commercially available products manufactured by LAPINUS FIBERS BV Examples include the Roxul series.
上記金属繊維としては、通常、摩擦材に用いられるものであれば特に制限はなく、例えば、アルミ、鉄、亜鉛、錫、チタン、ニッケル、マグネシウム、シリコン、銅などの単体金属又はこれらの金属の合金を主成分とする繊維を用いることができる。また、これらの金属若しくは合金は、繊維形状以外に、粉末の形状で含有しても良い。しかし、銅及び銅を含有する合金は、環境有害性の観点で含有しないことが好ましい。 The metal fiber is not particularly limited as long as it is usually used for a friction material. For example, a single metal such as aluminum, iron, zinc, tin, titanium, nickel, magnesium, silicon, copper, or a metal of these metals. The fiber which has an alloy as a main component can be used. These metals or alloys may be contained in the form of powder in addition to the fiber form. However, it is preferable not to contain copper and an alloy containing copper from the viewpoint of environmental harm.
上記有機繊維としては、アラミド繊維、セルロース繊維、アクリル繊維、フェノール樹脂繊維などを用いることができ、これらを単独で又は２種類以上を組み合わせて使用することができる。 As said organic fiber, an aramid fiber, a cellulose fiber, an acrylic fiber, a phenol resin fiber etc. can be used, These can be used individually or in combination of 2 or more types.
上記炭素系繊維としては、耐炎化繊維、ピッチ系炭素繊維、ＰＡＮ系炭素繊維、活性炭繊維などを用いることができ、これらを単独で又は２種類以上を組み合わせて使用することができる。 As the carbon-based fiber, flame-resistant fiber, pitch-based carbon fiber, PAN-based carbon fiber, activated carbon fiber, or the like can be used, and these can be used alone or in combination of two or more.
本発明の摩擦材組成物における、繊維基材の含有量は、摩擦材組成物において５〜４０質量％であることが好ましく、５〜２０質量％であることがより好ましく、５〜１５質量％であることが特に好ましい。繊維基材の含有量を５〜４０質量％の範囲とすることで、摩擦材としての最適な気孔率が得られ、鳴き防止ができ、適正な材料強度が得られ、耐摩耗性を発現し、成形性をよくすることができる。 The content of the fiber substrate in the friction material composition of the present invention is preferably 5 to 40% by mass, more preferably 5 to 20% by mass, and 5 to 15% by mass in the friction material composition. It is particularly preferred that By setting the content of the fiber base in the range of 5 to 40% by mass, an optimum porosity as a friction material can be obtained, squeal can be prevented, an appropriate material strength can be obtained, and wear resistance can be exhibited. The moldability can be improved.
［摩擦材］
本実施形態の摩擦材は、本発明の摩擦材組成物を一般に使用されている方法で成形して製造することができ、好ましくは加熱加圧成形して製造される。詳細には、例えば、本発明の摩擦材組成物をレーディゲミキサー（「レーディゲ」は登録商標）、加圧ニーダー、アイリッヒミキサー（「アイリッヒ」は登録商標）等の混合機を用いて均一に混合し、この混合物を成形金型にて予備成形し、得られた予備成形物を成形温度１３０〜１６０℃、成形圧力２０〜５０ＭＰａ、成形時間２〜１０分間の条件で成形し、得られた成形物を１５０〜２５０℃で２〜１０時間熱処理することで製造される。また更に、必要に応じて塗装、スコーチ処理、研磨処理を行うことで製造される。
[Friction material]
The friction material of the present embodiment can be manufactured by molding the friction material composition of the present invention by a generally used method, and is preferably manufactured by hot pressing. In detail, for example, the friction material composition of the present invention is uniformly applied using a mixer such as a Laedige mixer (“Laedige” is a registered trademark), a pressure kneader, an Eirich mixer (“Eirich” is a registered trademark), or the like. This mixture is preformed with a molding die, and the obtained preform is molded under conditions of a molding temperature of 130 to 160 ° C., a molding pressure of 20 to 50 MPa, and a molding time of 2 to 10 minutes. The molded product is heat-treated at 150 to 250 ° C. for 2 to 10 hours. Furthermore, it is manufactured by performing coating, scorch treatment, and polishing treatment as necessary.
［摩擦部材］
本実施形態の摩擦部材は、上記の本実施形態の摩擦材を摩擦面となる摩擦材として用いてなる。上記摩擦部材としては、例えば、下記の構成が挙げられる。
（１）摩擦材のみの構成
（２）裏金と、該裏金の上に摩擦面となる本発明の摩擦材組成物からなる摩擦材とを有する構成
（３）上記（２）の構成において、裏金と摩擦材との間に、裏金の接着効果を高めるための表面改質を目的としたプライマー層、及び、裏金と摩擦材との接着を目的とした接着層を更に介在させた構成
[Friction material]
The friction member of the present embodiment uses the friction material of the present embodiment as a friction material that becomes a friction surface. Examples of the friction member include the following configurations.
(1) Configuration of only friction material (2) Configuration having a back metal and a friction material made of the friction material composition of the present invention which becomes a friction surface on the back metal (3) In the above configuration (2), the back metal A primer layer for the purpose of surface modification to enhance the adhesion effect of the back metal and an adhesive layer for the purpose of bonding the back metal to the friction material
上記裏金は、摩擦部材の機械的強度の向上のために、通常、摩擦部材として用いるものであり、材質としては、金属又は繊維強化プラスチック等、具体的には、鉄、ステンレス、無機繊維強化プラスチック、炭素繊維強化プラスチック等が挙げられる。プライマー層及び接着層は、通常、ブレーキシュー等の摩擦部材に用いられるものであればよい。 The backing metal is usually used as a friction member to improve the mechanical strength of the friction member, and the material is metal or fiber reinforced plastic, specifically iron, stainless steel, inorganic fiber reinforced plastic. And carbon fiber reinforced plastics. The primer layer and the adhesive layer may be those used for friction members such as brake shoes.
本実施形態の摩擦材組成物は、高温制動におけるブレーキ振動やロータ摩耗が少ないため、自動車等のディスクブレーキパッドやブレーキライニング等の上張り材として特に有用であるが、摩擦部材の下張り材として成形して用いることもできる。なお、「上張り材」とは、摩擦部材の摩擦面となる摩擦材であり、「下張り材」とは、摩擦部材の摩擦面となる摩擦材と裏金との間に介在する、摩擦材と裏金との接着部付近のせん断強度、耐クラック性向上等を目的とした層のことである。 The friction material composition of the present embodiment is particularly useful as an upper material for disc brake pads and brake linings for automobiles and the like because it has less brake vibration and rotor wear during high-temperature braking, but is formed as a lower material for friction members. It can also be used. The “upper material” is a friction material that becomes the friction surface of the friction member, and the “underlay material” is a friction material that is interposed between the friction material that becomes the friction surface of the friction member and the back metal. It is a layer for the purpose of improving the shear strength, crack resistance, etc. in the vicinity of the bonded portion with the back metal.
以下、本発明の摩擦材組成物、摩擦材及び摩擦部材について、実施例及び比較例を用いて更に詳細に説明するが、本発明は何らこれらに制限されるものではない。 Hereinafter, although the friction material composition, the friction material, and the friction member of the present invention will be described in more detail with reference to Examples and Comparative Examples, the present invention is not limited thereto.
［実施例１〜５及び比較例１〜２］
（サンプルの作製）
表１に示す還元剤を用い、表２に示す配合比率に従って材料を配合し、実施例１〜５及び比較例１〜２のサンプル組成物を得た。実施例及び比較例にて用いた金属硫化物は、Chemetall社製「Stannolube」（硫化錫）、エラストマーは表１のものを用いた。また、サンプルの配合比率は表２の通りである。なお、表中の配合比率は質量部である。
[Examples 1-5 and Comparative Examples 1-2]
(Sample preparation)
Using the reducing agent shown in Table 1, materials were blended according to the blending ratios shown in Table 2, and sample compositions of Examples 1 to 5 and Comparative Examples 1 and 2 were obtained. The metal sulfide used in the examples and comparative examples was “Stannolube” (tin sulfide) manufactured by Chemetall, and the elastomers shown in Table 1 were used. Table 2 shows the blending ratio of the samples. In addition, the mixture ratio in a table | surface is a mass part.
このサンプル組成物を小型ミキサ（大阪ケミカル製、商品名：Vita-Mix Blender ABSOLUTE 3）で混合し、得られた混合物を成形温度１５０℃、成形圧力３２ＭＰａ、成形時間１０分間の条件で、プレス機（（株）井元製作所製、商品名：（MC-18EE-A型真空加熱プレス）を用いて加熱加圧成形した。得られた成形品を２１０℃で５時間熱処理し、研磨紙（三共理化学（株）製、商品名：ABRASIVE PAPER DISC No.600）を用いて表面から０．５ｍｍ研磨した。なお、実施例及び比較例では、金型を用いて縦５０ｍｍ、横２０ｍｍ、高さ５ｍｍのサイズでサンプルを作製した。 This sample composition was mixed with a small mixer (trade name: Vita-Mix Blender ABSOLUTE 3 manufactured by Osaka Chemical Co., Ltd.), and the resulting mixture was pressed at a molding temperature of 150 ° C., a molding pressure of 32 MPa, and a molding time of 10 minutes. (Product name: (MC-18EE-A type vacuum heating press), manufactured by Imoto Seisakusho Co., Ltd.) was used for heat and pressure molding. The resulting molded product was heat-treated at 210 ° C. for 5 hours to produce abrasive paper (Sankyo Rikagaku). The product was polished 0.5 mm from the surface using a product name: ABRASIVE PAPER DISC No. 600. In Examples and Comparative Examples, the mold was used to have a length of 50 mm, a width of 20 mm, and a height of 5 mm. Samples were made in size.
（表面分析）
荷重３ｋＰａ、環境温度５００℃で鉄板（ＦＣ２００）と表２中サンプルを密着させ、３時間加熱後、ＸＰＳ（Ｘ線光電子分光）測定装置で表面の硫黄の酸化状態を評価した。ＸＰＳ測定条件は表３に示す。また、測定結果の判定法は表４に示す。
(Surface analysis)
The iron plate (FC200) and the sample in Table 2 were brought into close contact with each other at a load of 3 kPa and an environmental temperature of 500 ° C. After heating for 3 hours, the oxidized state of sulfur on the surface was evaluated with an XPS (X-ray photoelectron spectroscopy) measuring device. Table 3 shows the XPS measurement conditions. Table 4 shows the determination method of the measurement results.
摩擦材組成物中に標準電極電位の値が請求項の範囲である還元剤を特定量含有し、環境有害性の高い銅を含有しない実施例１〜５は、還元剤を含まない比較例１又は標準電極電位の値が請求項の範囲外である比較例２と比較して、ディスクロータの硫酸化の抑制効果を示した。 Examples 1 to 5 containing a specific amount of a reducing agent whose standard electrode potential is within the scope of the claims within the friction material composition and containing no environmentally hazardous copper are Comparative Examples 1 containing no reducing agent. Or compared with the comparative example 2 whose value of a standard electrode potential is outside the range of a claim, the suppression effect of the sulfation of a disk rotor was shown.
本発明の摩擦材組成物は、従来品と比較して、環境負荷の高い銅を含有せずに、高温制動における摩擦材及びディスクロータの摩耗量が少ないため、該摩擦材組成物は乗用車用ブレーキパッド等の摩擦材及び摩擦部材に好適である。 Since the friction material composition of the present invention does not contain copper, which has a high environmental load, compared with the conventional product, the friction material composition and the disk rotor have less wear during high temperature braking. It is suitable for friction materials such as brake pads and friction members.
Claims (5)
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| WO2019074012A1 (en) * | 2017-10-11 | 2019-04-18 | 日立化成株式会社 | Friction material composition, and friction material and friction member each obtained from friction material composition |
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| WO2019074012A1 (en) * | 2017-10-11 | 2019-04-18 | 日立化成株式会社 | Friction material composition, and friction material and friction member each obtained from friction material composition |
| JPWO2019074012A1 (en) * | 2017-10-11 | 2020-12-24 | 昭和電工マテリアルズ株式会社 | Friction material composition, friction material and friction member using friction material composition |
| US11155733B2 (en) | 2017-10-11 | 2021-10-26 | Showa Denko Materials Co., Ltd. | Friction material composition, and friction material and friction member each obtained using friction material composition |
| JP7169981B2 (en) | 2017-10-11 | 2022-11-11 | 昭和電工マテリアルズ株式会社 | Friction material composition, friction material and friction member using friction material composition |
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