JP2010037530A - 樹脂潤滑用グリース組成物 - Google Patents
樹脂潤滑用グリース組成物 Download PDFInfo
- Publication number
- JP2010037530A JP2010037530A JP2008222113A JP2008222113A JP2010037530A JP 2010037530 A JP2010037530 A JP 2010037530A JP 2008222113 A JP2008222113 A JP 2008222113A JP 2008222113 A JP2008222113 A JP 2008222113A JP 2010037530 A JP2010037530 A JP 2010037530A
- Authority
- JP
- Japan
- Prior art keywords
- fatty acid
- resin
- metal salt
- thickener
- grease composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 68
- 239000011347 resin Substances 0.000 title claims abstract description 68
- 239000004519 grease Substances 0.000 title claims abstract description 53
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 238000005461 lubrication Methods 0.000 title claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 76
- 239000002184 metal Substances 0.000 claims abstract description 76
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 55
- 239000000194 fatty acid Substances 0.000 claims abstract description 55
- 229930195729 fatty acid Natural products 0.000 claims abstract description 55
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 54
- 150000003839 salts Chemical class 0.000 claims abstract description 51
- 239000002199 base oil Substances 0.000 claims abstract description 41
- 239000002562 thickening agent Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 36
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 16
- 235000021122 unsaturated fatty acids Nutrition 0.000 claims abstract description 15
- 150000004670 unsaturated fatty acids Chemical class 0.000 claims abstract description 15
- 150000004671 saturated fatty acids Chemical class 0.000 claims abstract description 14
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000001506 calcium phosphate Substances 0.000 claims description 6
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- VIQSRHWJEKERKR-UHFFFAOYSA-L disodium;terephthalate Chemical compound [Na+].[Na+].[O-]C(=O)C1=CC=C(C([O-])=O)C=C1 VIQSRHWJEKERKR-UHFFFAOYSA-L 0.000 claims description 5
- 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 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 235000003441 saturated fatty acids Nutrition 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 2
- 235000011010 calcium phosphates Nutrition 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 abstract description 7
- -1 for example Substances 0.000 description 17
- 239000000344 soap Substances 0.000 description 17
- 239000000654 additive Substances 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000001050 lubricating effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000002480 mineral oil Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 235000019198 oils Nutrition 0.000 description 7
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 6
- 229910000881 Cu alloy Inorganic materials 0.000 description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 235000010446 mineral oil Nutrition 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 229930182556 Polyacetal Natural products 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 229920006324 polyoxymethylene Polymers 0.000 description 5
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000005083 Zinc sulfide Substances 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229920013639 polyalphaolefin Polymers 0.000 description 4
- 229920006122 polyamide resin Polymers 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 4
- 235000019731 tricalcium phosphate Nutrition 0.000 description 4
- 229940078499 tricalcium phosphate Drugs 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 description 4
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 4
- 229940114072 12-hydroxystearic acid Drugs 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 3
- WQEPLUUGTLDZJY-UHFFFAOYSA-N pentadecanoic acid Chemical compound CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- YWWVWXASSLXJHU-AATRIKPKSA-N (9E)-tetradecenoic acid Chemical compound CCCC\C=C\CCCCCCCC(O)=O YWWVWXASSLXJHU-AATRIKPKSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 229920002367 Polyisobutene Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000010775 animal oil Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- YZXBAPSDXZZRGB-DOFZRALJSA-N arachidonic acid Chemical compound CCCCC\C=C/C\C=C/C\C=C/C\C=C/CCCC(O)=O YZXBAPSDXZZRGB-DOFZRALJSA-N 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-MDZDMXLPSA-N elaidic acid Chemical compound CCCCCCCC\C=C\CCCCCCCC(O)=O ZQPPMHVWECSIRJ-MDZDMXLPSA-N 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- KEMQGTRYUADPNZ-UHFFFAOYSA-N heptadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(O)=O KEMQGTRYUADPNZ-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- VKOBVWXKNCXXDE-UHFFFAOYSA-N icosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCC(O)=O VKOBVWXKNCXXDE-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
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Abstract
【解決手段】基油と脂肪酸金属塩の増ちょう剤を含むグリース基材に、飽和若しくは不飽和の脂肪酸や脂肪酸金属塩(上記の増ちょう剤として用いた脂肪酸金属塩を除く)を添加して樹脂潤滑用グリース組成物とする。飽和若しくは不飽和の脂肪酸の炭素数は8〜22が好ましい。脂肪酸金属塩は炭素数8〜14である直鎖の飽和脂肪酸の金属塩、若しくは不飽和基の数が1〜4である炭素数16〜22である不飽和脂肪酸の金属塩であって、金属は1〜4価であるものがよい。飽和若しくは不飽和の脂肪酸や脂肪酸金属塩は、単独でまたは併用して用いられる。
【選択図】なし
Description
例えば、金属同士の摩擦や摩耗には、リンやイオウなどの元素を含む極圧剤や耐摩耗剤
が効果的で、これらの添加剤は積極的に金属表面と化学反応を起こすことによって皮膜を形成し、これによって摩擦や摩耗の低減や焼付を防止するなどの機能を発揮させる事はよく知られており、エンジンオイルやギヤーオイル及び高機能な工業用潤滑油やグリースにはこれらの技術が広く応用されている。
例えば、上述した金属同士の摩擦や摩耗に効果的なリン系やイオウ系添加剤を使用する技術を、樹脂同士あるいは樹脂と金属材料等の潤滑個所に適用した場合は、金属同士で得られるような摩擦低減効果は殆ど得られず、逆に摩擦や耐摩耗の性能が悪化し、却って機械部品の寿命が短くなったりするケースも少なくない。
そして、上記の飽和若しくは不飽和の脂肪酸及び/又は脂肪酸金属塩の少なくとも1種類以上の合計含有量は、グリース組成物全量に対して約0.1〜10質量%程度で使用すると好ましい。更に、脂肪酸金属塩増ちょう剤と共に、増ちょう剤として、例えば、ウレア、ベントナイト、リン酸カルシウム、ナトリウムテレフタラメートその他を単独で又は組み合わせて使用することができる。
特に、API(American Petroleum Institute;米国石油協会)基油カテゴリーでグループ1、グループ2、グループ3、グループ4などに属する基油を、単独または混合物として使用することができる。
グループ2基油には、例えば、原油を常圧蒸留して得られる潤滑油留分に対して、水素化分解、脱ろうなどの精製手段を適宜組み合わせて適用することにより得られたパラフィン系鉱油がある。ガルフ社法などの水素化精製法により精製されたグループ2基油は、全イオウ分が10ppm未満、アロマ分が5%以下であり、本発明において好適に用いることができる。
上記した各種の油は、単独で又は混合して基油として使用することができるが、上記のものは単なる例示であって、これによって本発明が限定されるものではない。
場合によっては、脂肪酸金属塩の増ちょう剤と共に、ベントナイト、クレイ、シリカ、第三リン酸カルシウム、カルシウムスルフォネートコンプレックス、ウレア、ナトリウムテレフタラメートその他の増ちょう剤の1種または複数種と適宜に組み合わせて用いることもできる。
酸化防止剤としては、例えば、2,6−ジ−tブチル−4−メチルフェノール、2,6−ジ−tブチルパラクレゾール、P,P′−ジオクチルジフェニルアミン、N−フェニル−α−ナフチルアミン、フェノチアジンなどがある。
防錆剤としては、酸化パラフィン、カルボン酸金属塩、スルフォン酸金属塩、カルボン酸エステル、スルフォン酸エステル、サリチル酸エステル、コハク酸エステル、ソルビタンエステルや各種アミン塩などがある。
金属不活性剤としては、N,N′ジサリチリデン−1,2−ジアミノプロパン、ベンゾトリアゾール、ベンゾイミダゾール、ベンゾチアゾール、チアジアゾールなどがある。
ポリマーとしては、ポリブテン、ポリイソブテン、ポリイソブチレン、ポリイソプレン、ポリメタクリレートなどが挙げられる。
なお、上記した他の添加剤は、いずれも例示であって何らこれに限られるものではない。
実施例及び比較例の調製に当り、下記の材料を用意した。
1.基油A:40℃の動粘度が101.1mm2/sの鉱物油である。
2.基油B:40℃の動粘度が31.2mm2/sのポリα−オレフィン油である。
3.基油C:40℃の動粘度が47.08mm2/s、粘度指数が146、%CAが1以下、%CNが11.9、%CPが85以上である高度精製油である。
4.増ちょう剤A:基油中で12ヒドロキシステアリン酸と水酸化リチウムとの反応で
得られるリチウム12ヒドロキシステアレ−ト石けんである。
5.増ちょう剤B:基油中でオクチルアミン2モルとMDI(4,4′−ジフェニルメタンジイソシアネート)1モルとの合成反応により得られるジウレアである。
6.増ちょう剤C:基油中でベントナイトを有機溶媒で膨潤しゲル化させて得られるベントナイトである。
7.増ちょう剤D:基油中でNオクタデシルテレフタルサン酸メチルと水酸化ナトリウムとの反応で有られるナトリウムテレフタラメートである。
8.増ちょう剤E:〔Ca3(PO4)2〕3・Ca(OH)2で表わされるヒドロキシアパタイト組成の第三リン酸カルシウムを有機溶媒で膨潤しゲル化させて得られるものである。
具体的には、実施例1〜8の増ちょう剤A(リチウム石けん)を使用したグリースについては、グリース組成物の合計量が1000gになるように、基油、増ちょう剤、並びに添加剤である各種脂肪酸又は脂肪酸金属塩を、表1〜2に示す配合割合にてあらかじめ計量した。その後、内容量3kgのグリース専用の製造釜内に、基油と12ヒドロキシステアリン酸および水酸化リチウムと少量の水を張込み、密封し、攪拌加熱しながらけん化反応を行い、約150℃で0.35MPaの圧力まで上昇させる。その後、徐々に脱水し、更に215℃まで加熱し内容物を溶解させる。その後、一定の速度にて冷却し、石けん繊維を成長させた後、上記添加物の各種脂肪酸又は脂肪酸金属塩を張り込み、ホモジナイザー処理して実施例1〜6の樹脂潤滑用グリース組成物を得た。
なお、表1〜3に記載の脂肪酸金属塩は、予め表1〜3に記載したモル比により脂肪酸と金属を反応させて得た物を使用した(以下の表4比較例においても同じである)。
1.ちょう度 :JIS K2220−7によって測定した。
2.滴 点 :JIS K2220−8によって測定した。
3.基油の動粘度:JIS K2283によって測定した。
4.摩擦試験 :バウデン式摩擦試験を行った。すなわち、バウデン式摩擦試験装置を用い下記の試験条件にて、樹脂(試験材1b)と相対する樹脂以外の材料(試験材1a)間の摩擦係数を測定した。
(1)試験材1a:材質;鋼材S45Cと銅合金ALBC2。
寸法;外形5.0mm、長さ24mmのピン状で、ピンの先端は
r=2.5mmの半球状で接触面は直径約1.0mmの平面に
加工してある。
(2)試験材1b:材質;ポリアミド樹脂(東レ社製・66ナイロン/アミラン)と
ポリアセタール樹脂(デュポン社製・デルリン500P)。
寸法;長さ200mm、幅52mmの板状体である。
(3)温 度 :25℃
(4)すべり速度:1.0mm/s
(5)荷 重 :870g
(6)接触面の面圧:10MPa
なお、ポリアミド樹脂と鋼材間については全実施例及び全比較例についてバウデン式摩擦試験を行い、ポリアセタール樹脂と銅合金間についてはいくつか選択して試験を行った。
表1〜4に示すとおりである。
(考察)
実施例1〜13の樹脂潤滑用グリース組成物は、全て半固体のグリース状を示し、ちょう度は267〜290の範囲で適度な硬さの値を示し、滴点も177〜210℃で良好な状態であった。また、バウデン摩擦試験におけるポリアミド樹脂−鋼の間の摩擦係数は0.060〜0.069であり、ポリアセタール樹脂−銅合金の間の摩擦係数も0.062〜0.066と一様に低く、各種樹脂と銅合金や鋼などの樹脂以外との材料において良好な潤滑性能を示していることが判る。
一方、比較例1〜6のグリース組成物は、全て半固体のグリース状を示し、ちょう度も265〜281で適度な硬さの値を示し、滴点も180〜207℃と良好な状態であったが、バウデン摩擦試験におけるポリアミド樹脂−鋼の間の摩擦係数は0.082〜0.099であり、ポリアセタール樹脂−銅合金の間の摩擦係数も0.099、0.101と一様に高く、各種樹脂と銅合金や鋼などの樹脂以外との材料との間の潤滑状態において実施例よりもいずれも劣っており、潤滑性能の向上効果が得られていないことが判る。
こうした結果から、本発明の樹脂潤滑用グリース組成物は、良好な潤滑性能を示している。
Claims (4)
- 基油と脂肪酸金属塩増ちょう剤を含むグリース基材に、炭素数8〜22の飽和若しくは不飽和の脂肪酸、及び/又は炭素数8〜14である直鎖の飽和脂肪酸の金属塩若しくは不飽和基の数が1〜4である炭素数16〜22である不飽和脂肪酸の金属塩であって、金属は1〜4価である脂肪酸金属塩(増ちょう剤として用いた脂肪酸金属塩を除く。)の少なくとも1種類以上を含有させた樹脂潤滑用グリース組成物。
- 上記脂肪酸金属塩の金属が、リチウム、ナトリウム、カリウム、マグネシウム、カルシウム、亜鉛、アルミニウム、鉛である請求項1に記載の樹脂潤滑用グリース組成物。
- 上記飽和若しくは不飽和の脂肪酸及び/又は脂肪酸金属塩の少なくとも1種類以上の合計含有量が、グリース組成物全量に対して、0.1〜10質量%である請求項1または2に記載の樹脂潤滑用グリース組成物。
- 上記脂肪酸金属塩増ちょう剤と共に、増ちょう剤としてウレア、ベントナイト、リン酸カルシウム、ナトリウムテレフタラメートの少なくとも1種以上が含まれている請求項1〜3のいずれかに記載の樹脂潤滑用グリース組成物。
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WO2010003920A1 (en) | 2010-01-14 |
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US20110136709A1 (en) | 2011-06-09 |
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