JP6507175B2 - Softener for tail seal of shield machine - Google Patents
Softener for tail seal of shield machine Download PDFInfo
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- JP6507175B2 JP6507175B2 JP2016555248A JP2016555248A JP6507175B2 JP 6507175 B2 JP6507175 B2 JP 6507175B2 JP 2016555248 A JP2016555248 A JP 2016555248A JP 2016555248 A JP2016555248 A JP 2016555248A JP 6507175 B2 JP6507175 B2 JP 6507175B2
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- ester
- tail seal
- shield machine
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- softener
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- 239000000203 mixture Substances 0.000 claims description 49
- 150000002148 esters Chemical class 0.000 claims description 46
- 239000002199 base oil Substances 0.000 claims description 28
- 239000002562 thickening agent Substances 0.000 claims description 24
- 239000000314 lubricant Substances 0.000 claims description 14
- 229930195733 hydrocarbon Natural products 0.000 claims description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims description 12
- 239000004215 Carbon black (E152) Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- 239000004902 Softening Agent Substances 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 239000002657 fibrous material Substances 0.000 claims description 6
- 150000004665 fatty acids Chemical class 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 150000001735 carboxylic acids Chemical class 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- -1 hydroxy fatty acid Chemical class 0.000 description 14
- 239000000835 fiber Substances 0.000 description 12
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 7
- 239000002480 mineral oil Substances 0.000 description 7
- 235000010446 mineral oil Nutrition 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 239000000344 soap Substances 0.000 description 5
- 235000013877 carbamide Nutrition 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920000620 organic polymer Polymers 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920001083 polybutene Polymers 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- XDOFQFKRPWOURC-UHFFFAOYSA-N 16-methylheptadecanoic acid Chemical compound CC(C)CCCCCCCCCCCCCCC(O)=O XDOFQFKRPWOURC-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 239000004166 Lanolin Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 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
- 239000004480 active ingredient Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 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
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 229940039717 lanolin Drugs 0.000 description 2
- 235000019388 lanolin Nutrition 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 239000010689 synthetic lubricating oil Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 1
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 description 1
- XMKLTEGSALONPH-UHFFFAOYSA-N 1,2,4,5-tetrazinane-3,6-dione Chemical class O=C1NNC(=O)NN1 XMKLTEGSALONPH-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000004386 Erythritol Substances 0.000 description 1
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-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
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 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
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000001593 sorbitan monooleate Substances 0.000 description 1
- 229940035049 sorbitan monooleate Drugs 0.000 description 1
- 235000011069 sorbitan monooleate Nutrition 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、シールド掘進機のテールシール用軟化剤およびこれを添加したシールド掘進機用テールシール組成物に関する。 The present invention relates to a softener for tail seal of shield machine and a tail seal composition for shield machine added with the same.
シールド掘進機により、地中にトンネルを掘削する場合、進行方向の地山を掘削しながら、シールド掘進機は前進し、シールド掘進機の後方には、順次、トンネルの内壁となるセグメントが組み上げられている。この場合、掘削されるトンネルの外径（掘削開孔径）は、シールド掘進機の外径となるが、セグメントはシールド掘進機内部で組み上げられるため、セグメントの外径はシールド掘進機の内径以下となる。このため、シールド掘進機の後方ではトンネル外径とセグメント外径との間に隙間が生じ、この隙間には、シールド掘進機の前進にともない、裏込剤が充填される。
一方、シールド掘進機の後端で、未だ裏込剤が充填されていないトンネル内の空隙へは、地下水等が浸みだしており、この地下水のシールド掘進機内への浸入を防ぐため、シールド掘進機の末端にはシールド掘進機内のセグメントの外周とシールド掘進機の内周の間を止水するブラシシールが複数列、シールド掘進機の内周に設けられている。そして、その止水性を維持するために、これらのブラシシールの間にテールシール組成物が充填されている（例えば、特許文献１参照）。When drilling a tunnel in the ground with a shield machine, the shield machine moves forward while digging the ground in the direction of travel, and segments that will become the inner wall of the tunnel are built up sequentially behind the shield machine. ing. In this case, although the outer diameter of the tunnel to be excavated (drilled hole diameter) is the outer diameter of the shield machine, the segments are assembled inside the shield machine, so the outer diameter of the segment is less than the inner diameter of the shield machine. Become. For this reason, a gap is generated between the tunnel outer diameter and the segment outer diameter at the rear of the shield machine, and this space is filled with a back-in agent as the shield machine advances.
On the other hand, at the rear end of the shield drilling machine, ground water etc. has leaked into the gap in the tunnel not yet filled with the back-filling agent, and in order to prevent this groundwater from infiltrating into the shield drilling machine, the shield drilling machine A plurality of brush seals are provided on the inner periphery of the shield machine at the end of the shield machine to stop water between the outer periphery of the segment in the shield machine and the inner periphery of the shield machine. And, in order to maintain its waterproofness, a tail seal composition is filled between these brush seals (see, for example, Patent Document 1).
このテールシール組成物としては、鉱油系、合成系の潤滑油基油に、増ちょう剤としての鱗片状、その他無機充填剤、有機粉末、繊維質等を混合したものが用いられている（特許文献１〜４参照）。
ところで、裏込剤は充填当初は流動性が高く、その後固化するため、流動性の高い裏込剤がシールドマシン後端のブラシシール部に浸入し、ブラシシールとセグメントが固着して、シールドマシンの前進が困難となったり、セグメントの強度によっては、セグメントが破壊されるという問題があった。このため、裏込剤がブラシシール部に浸入してきても、ブラシシールとセグメントが固着しない方法が求められていた。As this tail seal composition, a mixture of a mineral oil base oil and a synthetic oil base oil with scaly as a thickener, other inorganic fillers, organic powders, fibers and the like is used (patented) See references 1 to 4).
By the way, since the back-in agent has high fluidity at the beginning of filling and then solidifies, the highly fluid back-in agent infiltrates into the brush seal portion at the rear end of the shield machine, and the brush seal and the segment adhere to each other. And the strength of the segment may cause the segment to be broken. For this reason, there has been a demand for a method in which the brush seal and the segment do not stick even if the back-in agent enters the brush seal portion.
本発明は、上記問題点を解決するもので、テールシール組成物に裏込剤がブラシシール部に浸入してきても、ブラシシールとセグメントが固着しにくいシールド掘進機用テールシール組成物のための軟化剤およびこの軟化剤を添加したテールシール組成物を提供するものである。 The present invention solves the above-mentioned problems, and is for a tail seal composition for a shield machine in which the brush seal and the segment are less likely to adhere to each other even if the back seal composition intrudes the brush seal portion into the backing agent. A softener and a tail seal composition to which the softener is added are provided.
本発明者らは上記課題を解決するために鋭意研究を進めた結果、驚くべきことに、繊維質などを含有するテールシール組成物に特定構造のエステルを添加することにより、止水性を維持したまま、裏込剤が混入しても硬化しない状態を維持することを見出した。 As a result of intensive studies to solve the above problems, the present inventors surprisingly maintained water repellency by adding an ester having a specific structure to a tail seal composition containing fibers and the like. As it was, it was found that even when the back-in agent is mixed, the state of not curing is maintained.
本発明は、かかる知見に基づきなされたもので、次の通りである。
（１）炭化水素からなる潤滑油基油、増ちょう剤および繊維質を含有するシールド掘進機のテールシール組成物用添加剤であって、鎖状カルボン酸と鎖状アルコールとのエステルから選択された１種以上からなるか、もしくは前記エステルから選択された１種以上を含むシールド掘進機のテールシール用軟化剤。
（２）エステルが、炭素数４〜４０の鎖状一価カルボン酸（脂肪酸）と、炭素数３〜１０の鎖状アルコールとのエステルである上記（１）に記載のシールド掘進機のテールシール用軟化剤。
（３）エステルに残存する水酸基が、一分子あたり１以下である上記（１）に記載のシールド掘進機用テールシール用軟化剤。
（４）[A] 炭化水素からなる潤滑油基油１０〜７０質量％、[B] 増ちょう剤３０〜８０質量％、[C] 繊維質１〜２０質量％、および、[D] 上記（１）〜（３）に記載の１種以上のエステル０.２〜２０質量％を含有するシールド掘進機用テールシール組成物。The present invention was made based on such findings and is as follows.
(1) A lubricant base oil comprising a hydrocarbon, an additive for a tail seal composition of a shield machine containing a thickener and a fibrous material, which is selected from esters of a linear carboxylic acid and a linear alcohol A softener for tail seal of a shield machine comprising one or more kinds or one or more kinds selected from the above-mentioned esters.
(2) The tail seal of the shield machine according to the above (1), wherein the ester is an ester of a linear monovalent carboxylic acid having 4 to 40 carbon atoms (fatty acid) and a linear alcohol having 3 to 10 carbon atoms. For softeners.
(3) The softener for a tail seal for a shield machine according to the above (1), wherein the number of hydroxyl groups remaining in the ester is 1 or less per molecule.
(4) [A] 10 to 70 mass% of a lubricant base oil composed of a hydrocarbon, 30 to 80 mass% of a [B] thickener, [C] 1 to 20 mass% of a fibrous material, and [D] The tail seal composition for shield machines containing 0.2-20 mass% of 1 or more types of ester as described in 1)-(3).
本発明の軟化剤は、炭化水素からなる潤滑油基油、増ちょう剤および繊維質を含有するテールシール組成物に添加することにより、裏込剤が混入した場合、軟化状態にすることにより、ブラシシールとセグメントとの固着を抑制できるという格別の効果を奏する。
また、本発明のシールド掘進機用テールシール組成物は、裏込剤が混入した場合でも、軟化状態にし、ブラシシールとセグメントとの固着を抑制するため、シールド掘進機による掘削を効率良く行うことができるという格別の効果を奏する。The softener according to the present invention is added to a lubricant base oil comprising a hydrocarbon, a thickener and a tail seal composition containing a fibrous material, whereby the softener is brought into a softened state when it is mixed with a back agent. The special effect that the adhesion between the brush seal and the segment can be suppressed is achieved.
In addition, the tail seal composition for a shield machine according to the present invention is in a softened state even when a back-in agent is mixed, and efficiently performs digging with the shield machine to suppress adhesion between the brush seal and the segment. The special effect of being able to
本発明の軟化剤は、裏込剤が混入したテールシール組成物を軟化状態にして、裏込剤の凝結を遅延させるもので、鎖状カルボン酸と鎖状アルコールとのエステルを有効成分とする。
このエステルを構成する鎖状カルボン酸は、鎖状炭化水素の少なくとも一つの水素がカルボキシル基で置換された構造を有し、好ましくは、その末端にカルボキシル基を有するものである。このカルボン酸の炭素数は４〜４０が好ましく、８〜３５がより好ましく、一価カルボン酸（脂肪酸）が好ましい。なお、この鎖状カルボン酸は飽和でも不飽和でもよく、直鎖でも分岐でもよい。また、水素の一部が水酸基で置換されているヒドロキシ脂肪酸でもよい。なお、単一の化合物でも複数の化合物の混合物でもよい。
エステルを構成する鎖状アルコールは、鎖状炭化水素の少なくとも一つの水素が水酸基（ＯＨ基）で置換された構造であり、好ましくはその末端に水酸基を有するものである。その炭素数は炭素２〜１２が好ましく、一価でも、二価以上の多価アルコール（ポリオール）のいずれでもでもよいが、２価〜４価の多価アルコールがより好ましい。この鎖状アルコールは飽和でも不飽和でもよく、直鎖でも分岐でもよい。その炭素数は３〜１０がより好ましい。また、単一の化合物でも複数の化合物の混合物でもよい。The softening agent according to the present invention brings the tail seal composition mixed with the back agent into a softened state to delay the setting of the back agent, and comprises an ester of a linear carboxylic acid and a linear alcohol as an active ingredient. .
The chain carboxylic acid constituting the ester has a structure in which at least one hydrogen of a chain hydrocarbon is substituted with a carboxyl group, and preferably has a carboxyl group at the end. 4-40 are preferable, as for carbon number of this carboxylic acid, 8-35 are more preferable, and monohydric carboxylic acid (fatty acid) is preferable. The linear carboxylic acid may be saturated or unsaturated, linear or branched. In addition, it may be a hydroxy fatty acid in which a part of hydrogen is substituted by a hydroxyl group. In addition, a single compound or a mixture of a plurality of compounds may be used.
The chain alcohol constituting the ester has a structure in which at least one hydrogen of the chain hydrocarbon is substituted by a hydroxyl group (OH group), and preferably has a hydroxyl group at the end. The carbon number thereof is preferably a carbon number of 2 to 12, and may be either a monovalent or divalent or higher polyhydric alcohol (polyol), but a divalent to tetravalent polyhydric alcohol is more preferable. The chain alcohol may be saturated or unsaturated, linear or branched. The carbon number is more preferably 3-10. Also, it may be a single compound or a mixture of a plurality of compounds.
本発明のエステルは、全ての水酸基がエステル結合を形成するフルエステルでも、一部の水酸基がエステル結合を形成していない部分エステルでもよい。フルエステルか、エステルに残存するＯＨ基が一分子あたり１以下である部分エステルがより好ましい。
また、これらのエステルは、単独で用いても、二種類以上を混合して用いても良い。
本発明の軟化剤は、上記エステルそのままを軟化剤として用いても良く、また、上記エステルを有機溶媒等に溶解又は分散させたものであっても良い。この場合、有機溶媒としては、テールシール組成物中の潤滑油基油と相溶性を有する各種の炭化水素溶媒であれば特に支障はなく、テールシールに用いられる潤滑油基油を溶媒として用いることがより好ましい。この軟化剤中の上記エステルの含有量は、添加の効率上、５０質量％以上が好ましく、上記エステルをそのまま軟化剤とすることがより好ましい。
なお、この軟化剤には、上記エステル以外に、必要に応じて、一般に潤滑油やグリースなどに用いられている、清浄剤、分散剤、摩耗防止剤、酸化防止剤、さび止め剤、腐食防止剤などを適宜添加することができる。The ester of the present invention may be a full ester in which all the hydroxyl groups form an ester bond or a partial ester in which a part of the hydroxyl groups do not form an ester bond. More preferred is a full ester or a partial ester having 1 or less OH groups remaining in the ester per molecule.
In addition, these esters may be used alone or in combination of two or more.
The softening agent of the present invention may use the above ester itself as a softening agent, or may be one obtained by dissolving or dispersing the above ester in an organic solvent or the like. In this case, as the organic solvent, various hydrocarbon solvents having compatibility with the lubricating oil base oil in the tail seal composition are not particularly disturbed, and the lubricating oil base oil used for the tail seal is used as the solvent Is more preferred. The content of the ester in the softener is preferably 50% by mass or more in terms of the efficiency of addition, and it is more preferable to use the ester as the softener as it is.
In addition to the above-mentioned esters, as a softener, a detergent, a dispersant, an antiwear agent, an antioxidant, an anticorrosion agent, an anticorrosion agent, which are generally used in lubricating oils and greases as needed An agent etc. can be added suitably.
本発明の軟化剤は、炭化水素からなる潤滑油基油、増ちょう剤、繊維質を含有するシールド掘進機用テールシール組成物に添加される。この添加量は、テールシール組成物全量基準で、上記エステルの合計量として、０.２〜２０質量％になるように添加することが好ましく、０.５〜１５質量％がより好ましく、０.７〜１０質量％がさらに好ましい。 The softening agent of the present invention is added to a lubricant base oil comprising a hydrocarbon, a thickener, and a tail seal composition for a shield machine including a fibrous material. The addition amount is preferably 0.2% to 20% by mass, more preferably 0.5% to 15% by mass, based on the total amount of the ester, based on the total amount of the tail seal composition. 7-10 mass% is further more preferable.
本発明のシールド掘進機用テールシール組成物は、[A] 炭化水素からなる潤滑油基油１０〜７０質量％、[B] 増ちょう剤３０〜８０質量％、[C] 繊維質１〜２０質量％、および、[D] 鎖状カルボン酸と鎖状アルコールとのエステル０.２〜２０質量％を含有するものである。この組成物は、圧送の容易性、止水性、水分混入時の安定性、高温時での油保持力のため、１５℃における密度が１.１〜１.８ｇ／ｃｍ３のものが好ましく、１.１〜１.５ｇ／ｃｍ３がより好ましく、１.１〜１.４ｇ／ｃｍ３がさらに好ましい。また、同様の理由により、不混和ちょう度が１５０〜３５０のものが好ましく、２２０〜２８０がより好ましい。なお、本発明にいう不混和ちょう度の測定は、ＪＩＳ Ｋ２２２０に準拠する方法による。
さらに、本発明のシールド掘進機用テールシール組成物は実質的に水分を含まないものが好ましい。実質的に水分を含まないとは、不可避的に混入する水分を排除するものではないことを意味するが、水分含有量としては、テールシール組成物全量基準で、好ましくは、５質量％以下、より好ましくは、１質量％以下である。The tail seal composition for a shield machine according to the present invention comprises 10 to 70% by mass of a lubricant base oil consisting of [A] hydrocarbon, 30 to 80% by mass of [B] thickener, and [C] fibrous 1 to 20 It contains% by mass, and 0.2 to 20% by mass of ester of [D] linear carboxylic acid and linear alcohol. The composition preferably has a density of 1.1 to 1.8 g / cm 3 at 15 ° C. because of ease of pumping, water blocking property, stability when mixed with water, and oil holding power at high temperature, 1.1-1.5 g / cm < 3 > is more preferable, and 1.1-1.4 g / cm < 3 > is further more preferable. In addition, for the same reason, one having an immiscibility of 150 to 350 is preferable, and 220 to 280 is more preferable. In addition, the measurement of the immiscible penetration said to this invention is based on the method based on JISK2220.
Furthermore, it is preferable that the tail seal composition for a shield machine according to the present invention be substantially free of water. Substantially free of water means that it does not exclude water which is inevitably mixed, but the water content is preferably 5% by mass or less based on the total amount of the tail seal composition, More preferably, it is 1% by mass or less.
[A] 潤滑油基油
本発明の潤滑油基油は、通常の潤滑油に用いられる炭化水素からなる潤滑油基油であれば、鉱油系、合成油系あるいはこれらの混合物のいずれも用いることができる。
この潤滑油基油の物性としては、４０℃における動粘度が１００〜３０００ｍｍ２／ｓ、特には５５０〜１５００ｍｍ２／ｓのものが好ましい。さらに、流動点は０℃以下が好ましく、安全性の観点から、引火点は１５０℃以上が好ましい。
この潤滑油基油の含有量は組成物全量基準で１０〜７０質量％であるが、好ましくは、１５〜６０質量％、より好ましくは、２５〜５８質量％、さらに好ましくは、３５〜５７質量％である。 [A] Lubricant base oil The lubricant base oil of the present invention may be any mineral oil type, synthetic oil type or a mixture of these, as long as it is a lubricant base oil comprising hydrocarbons used in ordinary lubricating oils. Can.
The physical properties of the lubricating base oil, kinematic viscosity at 40 ℃ is 100~3000mm 2 / s, particularly preferably from 550~1500mm 2 / s. Furthermore, the pour point is preferably 0 ° C. or less, and from the viewpoint of safety, the flash point is preferably 150 ° C. or more.
The content of the lubricating base oil is 10 to 70% by mass based on the total amount of the composition, preferably 15 to 60% by mass, more preferably 25 to 58% by mass, and still more preferably 35 to 57%. %.
鉱油系潤滑油基油は、一般に、原油を常圧蒸留し、あるいはさらに、この蒸留残渣油を減圧蒸留して得られる留出油を各種の精製プロセスで精製した潤滑油留分を基油とし、これをそのまま、或いはこれに各種の添加剤等を調合して調製される。前記精製プロセスは、水素化精製、溶剤抽出、溶剤脱ろう、水素化脱ろう、硫酸洗浄、白土処理などであり、これらを適宜の順序で組み合わせて処理して、本発明に好適な鉱油系の潤滑油基油を得ることができる。異なる原油あるいは留出油を、異なるプロセスの組合せ、順序により得られた、性状の異なる複数の精製油の混合物も好適な基油として用いることができる。
この鉱油系潤滑油基油は、取り扱いの安全上の観点から芳香族分が２０％以下のものが好ましい。In general, mineral oil base oils are obtained by normal distillation of crude oil or, further, by using a lubricating oil fraction obtained by purifying the distillate obtained by vacuum distillation of this distillation residue oil by various refining processes as a base oil. This is prepared as it is or by blending various additives with it. The above-mentioned purification processes are hydrorefining, solvent extraction, solvent dewaxing, hydrodewaxing, sulfuric acid washing, clay treatment, etc., and these are combined and treated in an appropriate order to obtain mineral oil systems suitable for the present invention Lubricant base oils can be obtained. Different crude oils or distillates may be used as suitable base oils, as well as mixtures of several refined oils of different properties obtained by different process combinations and sequences.
The mineral oil base oil is preferably one having an aromatic content of 20% or less from the viewpoint of handling safety.
炭化水素からなる合成油系潤滑油基油としては、例えば、ポリ‐α‐オレフィン（ＰＡＯ）、低分子量エチレン・α‐オレフィン共重合体、ポリブテンやポリイソブテンなどの高分子ポリマーアルキルナフタレンなど挙げることができ、これらを単独であるいは組み合わせて用いることができる。
なお、鎖状カルボン酸と鎖状アルコールとのエステルからなるエステル系合成潤滑油は、裏込剤の混入により必要以上に軟化が生じ、止水性等が低下するので、潤滑油基油としては不適である。Examples of synthetic lubricating oil base oils comprising hydrocarbons include poly-α-olefin (PAO), low molecular weight ethylene / α-olefin copolymer, high molecular weight polymer alkyl naphthalene such as polybutene and polyisobutene, etc. These can be used alone or in combination.
In addition, ester-based synthetic lubricating oils consisting of esters of chain carboxylic acids and chain alcohols are softened more than necessary due to the inclusion of a back-up agent, and the water repellency etc. decreases, so they are unsuitable as lubricating oil base oils. It is.
[B] 増ちょう剤
本発明の増ちょう剤としては、テールシール組成物の止水性を向上させるために、無機粉体を用いることが好ましい。この場合の無機粉体は、珪素、アルミニウム、マグネシウム、カルシウム等の酸化物、水酸化物、炭酸塩、硫酸塩等の粉体を挙げることができ、さらにこれらの混合物、及び、天然に産するこれらの化合物を主成分とする鉱石の粉体等も用いることができる。具体的には、炭酸カルシウム、タルク、炭酸カルシウム、炭酸マグネシウム、硫酸カルシウム、水酸化アルミニウム、酸化マグネシウム、酸化カルシウム、酸化アルミニウム、シリカ、ベントナイト、珪藻土などの粉体が好適である。これらの無機粉体は、一種類でも複数の種類を混合して用いてもよい。
上記無機粉体は、平均粒径が０.５〜５００μｍのものが好ましく、５〜５０μｍのものがより好ましい。 [B] Thickener As the thickener of the present invention, it is preferable to use an inorganic powder in order to improve the water repellency of the tail seal composition. Examples of the inorganic powder in this case include powders of oxides such as silicon, aluminum, magnesium, calcium and the like, hydroxides, carbonates, sulfates and the like, and further, mixtures thereof and naturally produced Powders of ore mainly containing these compounds can also be used. Specifically, powders of calcium carbonate, talc, calcium carbonate, magnesium carbonate, calcium sulfate, aluminum hydroxide, magnesium oxide, calcium oxide, aluminum oxide, silica, bentonite, diatomaceous earth and the like are preferable. These inorganic powders may be used alone or in combination of two or more.
The inorganic powder preferably has an average particle diameter of 0.5 to 500 μm, and more preferably 5 to 50 μm.
また、テールシール組成物を圧送するのに適したちょう度に調整するために、通常の潤滑剤、グリース等で用いられている増ちょう剤を併用することが好ましい。このグリース等で用いられている増ちょう剤としては、金属石けん系、ウレア系、有機ポリマー系等を好適である。
金属石けん系増ちょう剤は、カルボン酸がステアリン酸、アゼライン酸などの脂肪族カルボン酸でも、テレフタル酸などの芳香族カルボン酸でもよく、特には１価または２価の脂肪族カルボン酸で、炭素数６〜２０の脂肪族カルボン酸のものが好ましい。また、金属は、リチウム、ナトリウムなどのアルカリ金属、カルシウムなどのアルカリ土類金属、アルミニウムのような両性金属でもよいが、アルカリ金属、特にはリチウムが好ましい。このようなカルボン酸金属塩は、一種類でも複数の種類を混合して用いてもよい。Further, in order to adjust the consistency to pressure-feed the tail seal composition, it is preferable to use in combination a thickener used in ordinary lubricants, greases and the like. As the thickener used in the grease and the like, metal soaps, ureas, organic polymers and the like are preferable.
In the metal soap-based thickener, the carboxylic acid may be an aliphatic carboxylic acid such as stearic acid or azelaic acid, or an aromatic carboxylic acid such as terephthalic acid, and in particular a monovalent or divalent aliphatic carboxylic acid, carbon The thing of several 6-20 aliphatic carboxylic acid is preferable. The metal may be an alkali metal such as lithium or sodium, an alkaline earth metal such as calcium, or an amphoteric metal such as aluminum, but an alkali metal, particularly lithium is preferred. Such carboxylic acid metal salts may be used alone or in combination of two or more.
ウレア系増ちょう剤としては、ジイソシアネートとモノアミンとの反応で得られるジウレア化合物やジイソシアネートとモノアミン、ジアミンとの反応で得られるポリウレア化合物等が好適であり、また、有機ポリマー系増ちょう剤としては、ＰＴＦＥ（ポリテトラフルオロエチレン）などが好適である。なお、上記金属石けん系、ウレア系、有機ポリマー系等の増ちょう剤は、単独でも、２種類以上を併用しても良い。 Suitable urea type thickeners include diurea compounds obtained by the reaction of diisocyanate and monoamine, and polyurea compounds obtained by the reaction of diisocyanate and monoamine and diamine. Also, as the organic polymer type thickener, Preferred is PTFE (polytetrafluoroethylene). The metal soap-based, urea-based and organic polymer-based thickeners may be used alone or in combination of two or more.
これらの増ちょう剤の含有量は、テールシール組成物全量基準で、合計量として、３０〜８０質量％であるが、無機粉体では、３５〜７５質量％が好ましく、３５〜６０質量％がより好ましい。なお、併用する金属石けん系、ウレア系、有機ポリマー系の増ちょう剤の含有量は、テールシール組成物全量基準で、３５質量％以下が好ましく、０.５〜２０質量％がより好ましい。 The total content of these thickeners is 30 to 80% by mass based on the total amount of the tail seal composition, but 35 to 75% by mass is preferable and 35 to 60% by mass is the inorganic powder. More preferable. The content of the metal soap-based, urea-based and organic polymer-based thickeners used in combination is preferably 35% by mass or less, and more preferably 0.5 to 20% by mass, based on the total amount of the tail seal composition.
[C] 繊維質
繊維質は、シールド掘進機のテールシール部にある金属網や金属線を束ねたブラシに絡みつき、潤滑油基油、増ちょう剤とともに止水性のある濾布層を形成するために用いられる。
この繊維質としては、天然由来または有機合成された有機繊維質のいずれをも用いることができ、例えば、天然由来の天然繊維としては、セルロース、綿繊維が、合成繊維としては、ポリプロピレン、ポリエステル等が好適である。
この繊維質は、長さが、平均で１０ｍｍ以下のものが好ましく、０.１〜８ｍｍがより好ましく、０.５〜６ｍｍがさらに好ましい。また、その太さは、平均で１０〜１００μｍが好ましく、１５〜９０μｍがより好ましい。
この繊維質の含有量は、テールシール組成物全量基準で、１〜２０質量％であるが、２〜１５質量％が好ましく、３〜１０質量％がさらに好ましい。 [C] Fibrous fiber is entangled with the metal mesh and metal wire brush in the tail seal of the shield machine to form a filter cloth layer with water proof oil base oil and thickening agent and water proofing property. Used for
As this fiber, any of naturally occurring or organically synthesized organic fibers can be used. For example, as natural fibers of natural origin, cellulose, cotton fibers, and as synthetic fibers, polypropylene, polyester, etc. Is preferred.
The length of the fiber is preferably 10 mm or less on average, more preferably 0.1 to 8 mm, and still more preferably 0.5 to 6 mm. Moreover, 10-100 micrometers is preferable on average, and, as for the thickness, 15-90 micrometers is more preferable.
The content of the fiber is 1 to 20% by mass, preferably 2 to 15% by mass, and more preferably 3 to 10% by mass, based on the total amount of the tail seal composition.
[D] エステル
本発明の鎖状カルボン酸と鎖状アルコールとのエステルは、軟化剤の有効成分として上述したものと同じである。
このエステルの含有量は、テールシール組成物全量基準で、０.２〜２０質量％であるが、０.５〜１５質量％が好ましく、０.７〜１０質量％がさらに好ましい。 [D] Ester The ester of the linear carboxylic acid and the linear alcohol of the present invention is the same as that described above as the active ingredient of the softening agent.
The content of this ester is 0.2 to 20% by mass, preferably 0.5 to 15% by mass, and more preferably 0.7 to 10% by mass, based on the total amount of the tail seal composition.
[E] 他の添加剤
本発明のテールシール組成物には、上記成分以外に、必要に応じて、一般に潤滑油やグリースなどに用いられている、清浄剤、分散剤、摩耗防止剤、酸化防止剤、さび止め剤、腐食防止剤などを適宜添加することができる。 [E] Other Additives The tail seal composition of the present invention may further contain , if necessary, a detergent, a dispersant, an antiwear agent, and an oxide, which are generally used in lubricating oils and greases, if necessary. An inhibitor, a rust inhibitor, a corrosion inhibitor, etc. can be added suitably.
次に示す潤滑油基油、増ちょう剤、繊維質、およびエステルを用いて、表１、２に示す割合（質量％）で混合してテールシール組成物を調製し、不混和ちょう度を測定した。この結果を表１、２に示す。
〔テールシール組成物の成分〕
Ａ．潤滑油基油
基油Ａ１：鉱油（ＪＸ日鉱日石エネルギー社製、溶剤精製重質油、１５℃の密度；０.９０ｇ／ｃｍ３）
基油Ａ２：ポリブテン、平均分子量；１５,０００
なお、上記鉱油Ａ１に、ポリブテンＡ２を混合したときの４０℃の動粘度（ｍｍ２／ｓ）を表１、２に示した。
Ｂ．増ちょう剤
増ちょう剤Ｂ１：タルク、平均粒径；２０μｍ
増ちょう剤Ｂ２：炭酸カルシウム、平均粒径；１０μｍ
増ちょう剤Ｂ３：Ｌｉステアリン酸石けん（関東化学社製試薬）Using the lubricant base oil, thickener, fiber, and ester shown below, they are mixed in the proportions (mass%) shown in Tables 1 and 2 to prepare a tail seal composition, and the immiscibility is measured. did. The results are shown in Tables 1 and 2.
[Component of tail seal composition]
A. Lubricant base oil Base oil A1: Mineral oil (JX Nippon Oil & Energy Corporation, solvent refined heavy oil, density at 15 ° C .; 0.90 g / cm 3 )
Base oil A2: polybutene, average molecular weight; 15,000
In addition, dynamic viscosity (mm < 2 > / s) of 40 degreeC when polybutene A2 is mixed with said mineral oil A1 was shown to Table 1, 2. FIG.
B. Thickener Thickener B1: Talc, average particle size: 20 μm
Thickener B2: Calcium carbonate, average particle size; 10 μm
Thickener B3: Li stearic acid soap (Kanto Chemical Co., Ltd. reagent)
Ｃ．繊維質
繊維質Ｃ１：綿繊維、平均長さ；１.８ｍｍ、平均直径；１８μｍ
繊維質Ｃ２：ポリエスチレンテレフタレート繊維、平均長さ；５ｍｍ、平均直径；２０μｍ
繊維質Ｃ３：セルロース繊維、平均長さ；３.０ｍｍ、平均直径；４３μｍ
Ｄ．エステル
エステルＤ１：ラノリン由来の脂肪酸とペンタエリスリトールから得られるエステル
エステルＤ２：ラノリン由来の脂肪酸とトリメチロールプロパンから得られるエステル
エステルＤ３：イソステアリン酸とネオペンチルグリコールから得られるエステル
エステルＤ４：オレイン酸とペンタエリスリトールから得られるエステル
エステルＤ５：オレイン酸とトリメチロールプロパンから得られるエステル
エステルＤ６：２‐エチルヘキサン酸とペンタエリスリトールから得られるエステル
エステルＤ７：ブチルステアレート
エステルＤ８：ソルビタンモノオレートC. Fibrous fiber C1: Cotton fiber, average length: 1.8 mm, average diameter: 18 μm
Fibrous C2: Polystyrene terephthalate fiber, average length: 5 mm, average diameter: 20 μm
Fibrous C3: Cellulose fiber, average length: 3.0 mm, average diameter: 43 μm
D. Ester Ester D1: Ester obtained from lanolin-derived fatty acid and pentaerythritol Ester D2: Ester obtained from lanolin-derived fatty acid and trimethylolpropane Ester D3: Ester obtained from isostearic acid and neopentyl glycol Ester D4: oleic acid and penta Esters obtained from erythritol Ester D5: Ester obtained from oleic acid and trimethylolpropane Ester D6: Ester obtained from 2-ethylhexanoic acid and pentaerythritol Ester D7: butyl stearate Ester D8: sorbitan monooleate
〔テールシール組成物の評価１：止水性〕
次に示す条件で耐水圧試験を行い、流出水の有無を測定した。
底部中央部に、中心間隔５ｍｍで縦横に４列、合計１６個の開口（直径３ｍｍ）開口を有する内径５２ｍｍのステンレス製の圧力容器を用いた。開口上にステンレス製のメッシュ（５０番、厚み０.８５ｍｍ）を載せ、上記で調製したテールシール組成物５０ｇを導入した。テールシール組成物上に水（１０ｇ）を置き、空気で３５ｋｇｆ／ｃｍ２の圧力で５分間加圧し、その際の底部開口からの水の流出有無により止水性の評価を行った。この結果を表１、２に示した。
この結果、繊維質を含まない比較例５は、止水性がないことが分かる。[Evaluation of Tail Seal Composition 1: Water Sealing]
A pressure resistance test was conducted under the following conditions to determine the presence or absence of runoff water.
A stainless steel pressure vessel with an inner diameter of 52 mm having an opening (diameter: 3 mm) having a total of 16 openings (diameter: 3 mm) with four rows vertically and horizontally with a center interval of 5 mm was used at the center of the bottom. A stainless steel mesh (No. 50, thickness 0.85 mm) was placed on the opening, and 50 g of the tail seal composition prepared above was introduced. Water (10 g) was placed on the tail seal composition, pressurized with air at a pressure of 35 kgf / cm 2 for 5 minutes, and the water stoppage evaluation was performed based on the presence or absence of water outflow from the bottom opening at that time. The results are shown in Tables 1 and 2.
As a result, it is found that Comparative Example 5 not containing fiber does not have water fastness.
〔テールシール組成物の評価２：混合初期軟化性〕
上記で調製したテールシール組成物１００ｇと、裏込材の主成分である速乾セメント〔トーヨーマテラン製、商品名インスタントセメント（３０分速乾性）〕、水１５ｇを手で混合し、混合前のテールシール組成物のちょう度と、混合直後のちょう度の差を測定することで、混合初期軟化性を評価した。この結果を表１、２に示した。テールシール組成物と速乾セメントおよび水との混合により、混合前のテールシール組成物よりも軟化し、ちょう度が増加するが、この差が大きいと硬化までに時間がかかり、凝固しにくいことを示す。
この結果、本発明のエステルを含有する実施例１〜１２の組成物は、エステルを含有しない、または、本発明のエステル以外のエステルを含有する比較例１〜４に比べて、混合初期のちょう度を軟化させる効果を有することが分かる。[Evaluation of tail seal composition 2: initial softening after mixing]
100 g of the tail seal composition prepared above, quick-drying cement (made by Toyo Materan, trade name Instant Cement (30 minutes quick-drying)) which is the main component of the lining material, and 15 g of water are mixed by hand before mixing The initial mixing softness was evaluated by measuring the consistency of the tail seal composition and the difference in consistency immediately after mixing. The results are shown in Tables 1 and 2. The mixing of the tail seal composition with the quick-drying cement and water softens and increases the consistency compared to the tail seal composition before mixing, but if this difference is large, it takes time to cure and is hard to solidify. Indicates
As a result, the compositions of Examples 1 to 12 containing the ester of the present invention did not contain an ester, or compared with Comparative Examples 1 to 4 containing an ester other than the ester of the present invention. It can be seen that it has the effect of softening the degree.
本発明のテールシール用軟化剤は、テールシール組成物に添加することにより、シールド掘進機テールのブラシシール部に浸入する裏込剤が混入しても軟化状態にして、ブラシシールとセグメントとの固着を抑制することができるため、シールド掘進機用のテールシール組成物として有用である。
また、本発明のテールシール組成物は、裏込剤が混入した場合、軟化状態にし、ブラシシールとセグメントとの固着を抑制できるため、シールド掘進機による掘削を効率良く行うことができるため、シールド掘進機に有用である。 The softener for tail seal of the present invention is added to the tail seal composition to soften the back seal agent even when the back agent invading the brush seal portion of the shield machine tail is softened, and the brush seal and the segment Since it can suppress sticking, it is useful as a tail seal composition for shield machines.
Further, the tail seal composition of the present invention is brought into a softened state when the back-in agent is mixed, and adhesion between the brush seal and the segment can be suppressed, so that drilling by the shield machine can be performed efficiently. Useful for digging machines.
Claims (4)
[B] 増ちょう剤３０〜８０質量％、
[C] 繊維質１〜２０質量％、および、
[D] 請求項１〜３に記載の１種以上のエステル０.２〜２０質量％
を含有するシールド掘進機用テールシール組成物。 [A] 10 to 70% by mass of a lubricant base oil consisting of hydrocarbons,
[B] 30-80 mass% of thickener
[C] 1 to 20% by mass of fibrous material, and
[D] 0.2 to 20% by mass of one or more esters according to claims 1 to 3
Tail shield composition for a shield machine comprising:
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014216954 | 2014-10-24 | ||
| JP2014216954 | 2014-10-24 | ||
| PCT/JP2015/079675 WO2016063900A1 (en) | 2014-10-24 | 2015-10-21 | Softener for tail seal for shield tunneling machine |
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| JPWO2016063900A1 JPWO2016063900A1 (en) | 2017-08-03 |
| JP6507175B2 true JP6507175B2 (en) | 2019-04-24 |
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| JP7303216B2 (en) * | 2018-11-30 | 2023-07-04 | ポゾリス ソリューションズ株式会社 | Additive for tail seal grease and tail seal grease for shield machines |
| JP7328138B2 (en) * | 2019-12-23 | 2023-08-16 | 株式会社大林組 | Tail seal composition for shield machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272687A (en) * | 1988-04-26 | 1989-10-31 | Chukyo Kasei Kogyo Kk | Semifluid sealing material |
| JPH02180983A (en) * | 1988-09-30 | 1990-07-13 | Chukyo Kasei Kogyo Kk | Semifluid sealing material |
| JP3040709B2 (en) * | 1996-02-05 | 2000-05-15 | 協同油脂株式会社 | Tail seal composition for shield machine |
| JP3670749B2 (en) * | 1996-03-18 | 2005-07-13 | 日本クエーカー・ケミカル株式会社 | Lubricant |
| JP2008024882A (en) * | 2006-07-25 | 2008-02-07 | Jsr Corp | Thermoplastic elastomer composition for sealant, molding material, and capacitor |
| JP2008144026A (en) * | 2006-12-08 | 2008-06-26 | Daicel Chem Ind Ltd | Additive for shield tunneling |
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