JPH02265947A - Polyacetal resin composition having excellent in friction and abrasion property - Google Patents
Polyacetal resin composition having excellent in friction and abrasion propertyInfo
- Publication number
- JPH02265947A JPH02265947A JP8839389A JP8839389A JPH02265947A JP H02265947 A JPH02265947 A JP H02265947A JP 8839389 A JP8839389 A JP 8839389A JP 8839389 A JP8839389 A JP 8839389A JP H02265947 A JPH02265947 A JP H02265947A
- Authority
- JP
- Japan
- Prior art keywords
- friction
- polyacetal resin
- lubricant
- weight
- resin 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.)
- Pending
Links
- 229930182556 Polyacetal Natural products 0.000 title claims abstract description 27
- 229920006324 polyoxymethylene Polymers 0.000 title claims abstract description 27
- 239000011342 resin composition Substances 0.000 title claims abstract description 10
- 238000005299 abrasion Methods 0.000 title abstract description 3
- 239000000314 lubricant Substances 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims abstract description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000843 powder Substances 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 6
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract description 5
- 229910002804 graphite Inorganic materials 0.000 abstract description 4
- 239000010439 graphite Substances 0.000 abstract description 4
- 239000010687 lubricating oil Substances 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- -1 polyethylene Polymers 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 abstract description 2
- 239000010696 ester oil Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 229920002545 silicone oil Polymers 0.000 abstract description 2
- 239000004698 Polyethylene Substances 0.000 abstract 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 239000003921 oil Substances 0.000 description 11
- 239000008188 pellet Substances 0.000 description 9
- 230000035515 penetration Effects 0.000 description 7
- 239000001993 wax Substances 0.000 description 7
- 238000001746 injection moulding Methods 0.000 description 6
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 229920000636 poly(norbornene) polymer Polymers 0.000 description 5
- 229920004943 Delrin® Polymers 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 229920005027 Ultraform® Polymers 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PYVHTIWHNXTVPF-UHFFFAOYSA-N F.F.F.F.C=C Chemical compound F.F.F.F.C=C PYVHTIWHNXTVPF-UHFFFAOYSA-N 0.000 description 1
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 125000002463 lignoceryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はポリアセタール樹脂組成物に係り、詳しくは加
工時のスクリュー食い込み性、熱安定性に優れ、しかも
摩擦、摩耗特性の優れたポリアセタール樹脂組成物に関
する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a polyacetal resin composition, and more specifically, a polyacetal resin composition that has excellent screw penetration during processing and thermal stability, as well as excellent friction and wear properties. relating to things.
（従来技術）
一般にポリアセタールは金属に比較して自己潤滑性に優
れ、低摩擦係数で摩擦、摩耗特性が良く、軽量で駆動時
の騒音が小さいため、軸受、歯車、ローラー１．カム、
ガイドレール等の無注油部品として極めて有用である。(Prior art) In general, polyacetal has superior self-lubricating properties compared to metals, has a low coefficient of friction, has good friction and wear characteristics, is lightweight, and produces less noise during driving, so it is used in bearings, gears, rollers, etc. cam,
Extremely useful as lubrication-free parts such as guide rails.
ナイロン６．６６等と比較して平衡吸水率が極めて小さ
いため、寸法安定性が良く、吸水による機械的物性の低
下が非常に小さいので、その用途は多方面にわたってい
る。Since it has an extremely low equilibrium water absorption rate compared to nylon 6.66, etc., it has good dimensional stability and the decrease in mechanical properties due to water absorption is extremely small, so its uses are wide-ranging.
しかしながら摺動部品としてみた場合、限界ＰＶ値が比
較的低いため、低負荷の用途に限定されている。However, when viewed as a sliding component, its limiting PV value is relatively low, so it is limited to low-load applications.
尚、ここでいう限界Ｐｖ値とは一般に軸受材料が、ある
一定の面圧Ｐ （ｋｇ／ｃｍ２）と周速Ｖ（ｍ／ｍ１ｎ
）以上になると材料が融けたり、焼は付いたりする負荷
の限界を示す、従って、限界Ｐｖ値が大きい程、摩擦、
摩耗特性は良好であり高負荷に耐えることを意味する。Note that the limit Pv value mentioned here generally means that the bearing material has a certain surface pressure P (kg/cm2) and circumferential speed V (m/m1n
) or more indicates the load limit at which the material will melt or seize. Therefore, the larger the limit Pv value, the greater the friction,
The wear properties are good, meaning it can withstand high loads.
このため、従来からポリアセタールの摩擦、摩耗特性を
改善するために二硫化モリブデン、タラファイト、四フ
ッ化エチレン微粉末、オイル、ワックス等の潤滑剤を添
加することが行なわれている。For this reason, in order to improve the friction and wear characteristics of polyacetal, lubricants such as molybdenum disulfide, taraphite, tetrafluoroethylene fine powder, oil, wax, etc. have been added to polyacetal.
また、オイル、ワックスの様な成形中に液状である潤滑
剤を添加する場合にはオイル、ワックス、を予め活性炭
やポリノルボルネン等の吸油体に含油させた後、溶融混
合していた。Furthermore, when a liquid lubricant such as oil or wax is added during molding, the oil or wax is impregnated in advance into an oil absorbing material such as activated carbon or polynorbornene, and then melted and mixed.
（発明が解決しようとする課題）
しかし、潤滑剤として二硫化モリブデン、グラファイト
を使用すると樹脂の色が黒色に限定されるばかりでなく
、四フッ化エチレン微粉末やオイル、ワックスを使用し
た場合に比べて、摩擦、摩耗特性の向上の効果が得られ
なかった。(Problem to be solved by the invention) However, when molybdenum disulfide or graphite is used as a lubricant, the color of the resin is not only limited to black, but also when fine powder of tetrafluoroethylene, oil, or wax is used. In comparison, the effect of improving friction and wear characteristics could not be obtained.
また、四フッ化エチレン微粉末を使用しても二硫化モリ
ブデン、グラファイトよりも滑剤としての効果はあるも
のの、オイル、ワックス類よりは劣っており、且つ高価
であるという問題点を有していた。一方、オイル、ワッ
クス類を使用すると摩擦摩耗特性の点で優れているが、
スクリュー押出をしようとすると、スクリューの食い込
み性が悪く得られた成形品の表面がべとつくという問題
があった。Furthermore, even if fine powder of ethylene tetrafluoride was used, it was more effective as a lubricant than molybdenum disulfide or graphite, but it was inferior to oils and waxes, and it was expensive. . On the other hand, the use of oils and waxes has excellent friction and wear properties, but
When screw extrusion was attempted, there was a problem that the screw had poor penetration and the surface of the obtained molded product was sticky.
また、オイル、ワックス類を活性炭やポリノルボルネン
等の吸油体に含油させる方法のうち活性炭を吸油体とし
て使用すれば、樹脂が黒色に限定されてしまい、また活
性炭が摩擦、摩耗特性の点でマイナス因子になっていた
。他方、ポリノルボルネンを吸油体として使用すれば、
ポリノルボルネンが主鎖中に二重結合を有しているため
耐熱性に劣り、且つポリノルボルネン系エラストマー自
身が摩擦、摩耗特性の点で活性炭と同様もしくはそれ以
上にマイナス因子となるという問題点があった。In addition, among methods of impregnating oil or wax into an oil absorbing material such as activated carbon or polynorbornene, if activated carbon is used as the oil absorbing material, the resin will be limited to black color, and activated carbon will have a disadvantage in terms of friction and wear properties. It was a factor. On the other hand, if polynorbornene is used as an oil absorber,
Polynorbornene has a double bond in its main chain, so it has poor heat resistance, and the polynorbornene elastomer itself has the same or more negative friction and wear characteristics as activated carbon. there were.
本発明は上記の課題を解消し、加工時のスクリュー食い
込み性、熱安定性を改善し、しかも摩擦、摩耗特性の優
れた成形体になるポリアセタール樹脂組成物を提供する
ことを目的とするものである。The object of the present invention is to solve the above-mentioned problems and provide a polyacetal resin composition that improves screw penetration during processing and thermal stability, and can be formed into molded products with excellent friction and wear characteristics. be.
（課題を解決するための手段）
前記の目的を達成するために、本発明はポリアセタール
樹脂１００重量部に下記一般式、（式中、Ｒ１はターシ
ャリブチル基、Ｒ２はターシャリブチル基か又はメチル
基、ｎは１０〜３０の整数である。）
で表される潤滑剤を１〜５重量部含有せしめた摩擦・摩
耗特性を有するポリアセタール樹脂組成物である。(Means for Solving the Problems) In order to achieve the above object, the present invention adds 100 parts by weight of a polyacetal resin to the following general formula, (wherein R1 is a tert-butyl group, R2 is a tert-butyl group, or This is a polyacetal resin composition having friction and abrasion characteristics containing 1 to 5 parts by weight of a lubricant represented by a methyl group (n is an integer of 10 to 30).
尚、本発明のポリアセタール樹脂組成物は種々の形態を
有するものであり、例えば所定の成分を配合した混合物
を押出機にて溶融混練りして得られたベレットであり、
また前記ペレットを用いて射出成形機、押出成形機等に
て丸棒、筒状、板状等の所定形状に作成した成形体、あ
るいは所定成分を配合した混合物であって、未だ溶融固
化していないものを含む。The polyacetal resin composition of the present invention has various forms, such as pellets obtained by melt-kneading a mixture of predetermined components in an extruder;
Also, it is a molded product made into a predetermined shape such as a round bar, a cylinder, a plate, etc. using an injection molding machine, an extrusion molding machine, etc. using the pellets, or a mixture of predetermined ingredients, which has not yet been melted and solidified. Including those without.
本発明で用いるポリアセター／ｌ／！！’、ホモポリマ
ー（ＣＨ２−ｏ＋ｎ、コポリマー＋ＧＨｚ−０３ｒ＋
（：ＣＨ２−ＣＨ２−０＋ｍのいずれでも良く、数平
均分子量２０，０００〜１００．０００を有している。Polyaceter used in the present invention /l/! ! ', homopolymer (CH2-o+n, copolymer + GHz-03r+
(: CH2-CH2-0+m, and has a number average molecular weight of 20,000 to 100.000.
また、潤滑剤として使用されるアルキル基次の一般式、
（式中、Ｒ，はターシャリブチル基、Ｒ２はターシャリ
ブチル基か又はメチル基、ｎは１０〜３０の整数である
。）
で表される化合物はポリアセタールと相溶し押発性が低
い物質で、例えばトリデシル３−（３−メチル−５−タ
ーシャリブチル−４−ヒドロキシフェニル）プロピオネ
ート、ペンタデシル３−（３゜５−ジターシャリブチル
−４−ヒドロキシフェニル）プロピオネート、オクタデ
シル３−（３，５−ジターシャリブチル−４−ヒドロキ
シフェニル）プロピオネートヘンエイコシル３−（３−
メチル−５−ターシャリブチル−４−ヒドロキシフェニ
ル）プロピオネート、テトラコシル３−（３゜５−ジタ
ージャリブデル−４−ヒドロキシフェニル）プロピオネ
ート、ベンタコシル３−（３，５−ジターシャリブチル
−４−ヒドロキシフェニル）プロピオネート等が挙げら
れる。In addition, an alkyl group used as a lubricant has the following general formula: (wherein, R is a tert-butyl group, R2 is a tert-butyl group or a methyl group, and n is an integer from 10 to 30). The compounds represented are substances that are compatible with polyacetal and have low extrudability, such as tridecyl 3-(3-methyl-5-tert-butyl-4-hydroxyphenyl) propionate, pentadecyl 3-(3゜5-ditertiary) Butyl-4-hydroxyphenyl)propionate, octadecyl 3-(3,5-ditertiarybutyl-4-hydroxyphenyl)propionate heneicosyl 3-(3-
Methyl-5-tert-butyl-4-hydroxyphenyl) propionate, Tetracosyl 3-(3゜5-diterjalybdel-4-hydroxyphenyl) propionate, Bentacosyl 3-(3,5-diter-butyl-4-hydroxy) phenyl) propionate and the like.
尚、本発明では潤滑剤として用いた上記化合物をポリア
セタール樹脂１００重量部に対し１〜５重量部、好まし
くは２〜３重量部含有させる必要があるが、もし含有量
が５重量部を越えるとスクリュー食い込み性が悪くなり
、１重量部未満では十分な摩擦・摩耗特性が得られない
。ここで、直鎖又は分岐した長鎖アルキル基（−Ｃ１！
（２ｎ＋１ ）は摩擦・摩耗特性に寄与するが、ｎが１
０未満では十分な効果が得られず、３０を越えるとポリ
アセタールとの相溶性が悪くなり、分離してスクリュー
食い込み性を阻害する。In the present invention, it is necessary to contain the above compound used as a lubricant in 1 to 5 parts by weight, preferably 2 to 3 parts by weight, per 100 parts by weight of the polyacetal resin, but if the content exceeds 5 parts by weight, Screw penetration becomes poor, and if it is less than 1 part by weight, sufficient friction and wear characteristics cannot be obtained. Here, a straight or branched long chain alkyl group (-C1!
(2n+1) contributes to friction and wear characteristics, but n is 1
If it is less than 0, no sufficient effect will be obtained, and if it exceeds 30, the compatibility with polyacetal will be poor and it will separate, inhibiting screw penetration.
また、エステル結合は（−ｃ−ｏ−）は、ポリアセター
ルとの親和性があり、相溶性を向上させている。Further, the ester bond (-c-o-) has an affinity with polyacetal and improves compatibility.
はポリアセタールの酸化防止剤、熱安定剤として効果を
発揮する。また、本発明ではこの前記一般式で表される
潤滑剤を１〜５重量部用いる事によって先述した摩擦・
摩耗特性のみならず、酸化防止性、熱安定性を格段に上
げることもできる。is effective as an antioxidant and heat stabilizer for polyacetal. In addition, in the present invention, by using 1 to 5 parts by weight of the lubricant represented by the above general formula, the above-mentioned friction and
It is possible to significantly improve not only wear characteristics but also oxidation prevention and thermal stability.
また、本発明組成物は上記ポリアセタール樹脂と潤滑剤
を通常の押出機で混練することによって得ることができ
る。この押出成形、射出成形での押出温度は１９０〜２
１０℃の範囲が好ましい。Further, the composition of the present invention can be obtained by kneading the above-mentioned polyacetal resin and a lubricant in a conventional extruder. The extrusion temperature in this extrusion molding and injection molding is 190-2
A range of 10°C is preferred.
１９０℃より低い温度で押し出すと、樹脂が硬くスクリ
ューに食い込みにくい。また、２１０℃より高い温度で
押し出すと、樹脂が焼けたり、分解し易くなるので適当
とは言えない。If extruded at a temperature lower than 190°C, the resin will be hard and difficult to bite into the screw. Furthermore, extruding at a temperature higher than 210° C. is not appropriate because the resin will burn or easily decompose.
ところで本発明は上記潤滑剤以外に目的に応じて、例え
ばフッ素樹脂微粉末、超高分子量ポリエチレン微粉末、
二硫化モリブデン、グラファイト、シリコーンオイル、
エステル系オイル等の体温滑剤や液体潤滑剤、また充填
剤、補強剤、各種添加剤や着色剤を用いて実施すること
も可能である。By the way, in addition to the above-mentioned lubricants, the present invention can also be used, depending on the purpose, for example, fluororesin fine powder, ultra-high molecular weight polyethylene fine powder,
Molybdenum disulfide, graphite, silicone oil,
It is also possible to use a body temperature lubricant such as ester oil, a liquid lubricant, a filler, a reinforcing agent, various additives, and a coloring agent.
以下、本発明を実施例により更に詳述するが、これらの
実施例のみに限定するものではない。Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples.
（実施例）
ポリアセタールとしてウルトラフォルムＨ２３２０（Ｂ
ＡＳＦ■製）かまたはデルリンＩＩ （デュポン■製）
の粉末１００重量部、潤滑剤としてＩＲＧＡＮＯＸ
１０７６（チバガイギー■製）の粉末を１゜５〜３．０
重量部の闇で変量して、ヘンシェルミキサーで攪拌混合
し、２軸押出機にて２溶融混練りし、ベレットを得た。(Example) Ultraform H2320 (B
ASF ■) or Delrin II (DuPont ■)
100 parts by weight of powder, IRGANOX as a lubricant
1076 (manufactured by Ciba Geigy) powder at 1°5 to 3.0
Various parts by weight were mixed by stirring using a Henschel mixer, and then melt-kneaded using a twin-screw extruder to obtain pellets.
このベレットを用いて射出成形機で試験片を作成し、射
出成形機のスクリュー食い込み性と得られた成形体の限
界ＰＶ値、最小動摩擦係数、限界摩耗係数を測定した。A test piece was made using an injection molding machine using this pellet, and the screw penetration property of the injection molding machine and the limit PV value, minimum dynamic friction coefficient, and limit wear coefficient of the obtained molded product were measured.
表１に配合及び測定結果、また第１図、第２図に表１に
おける実施例１と実施例７の面圧と動摩擦係数の関係を
示す。Table 1 shows the formulation and measurement results, and FIGS. 1 and 2 show the relationship between surface pressure and dynamic friction coefficient of Example 1 and Example 7 in Table 1.
尚、摩擦・摩耗特性は松原式スラスト試験より測定した
が、この場合の測定条件は次の通りである。The friction and wear characteristics were measured using the Matsubara thrust test, and the measurement conditions in this case were as follows.
速度 ： Ｖ ＝ ３０ ｍ／ｍｉｎ、 ｌ ５ ｍ／
ｍｉｎ相手材： ５４５Ｃ
（比較例）
比較例として、実施例で使用したものと同じポリアセタ
ール、ウルトラフォルムＨ２３２０（ＢＡＳＦ■製）か
またはデルリン１１ （デュポン■製）に潤滑剤を混入
しなかったものを実施例と同様に２軸押出機にてベレッ
ト化し射出成形機で試験片を作成して物性を測定した。Speed: V = 30 m/min, l 5 m/
min mating material: 545C (comparative example) As a comparative example, the same polyacetal used in the example, Ultraform H2320 (manufactured by BASF ■) or Delrin 11 (manufactured by DuPont ■) without lubricant was used. In the same manner as in the examples, the pellets were made into pellets using a twin-screw extruder, test pieces were prepared using an injection molding machine, and the physical properties were measured.
また、ポリアセタールとしてウルトラフォルム）１２３
２０（ＢＡ、ＳＦ■製）かまたはデルリン１１（デュポ
ン■製）１００重量部に、潤滑剤としてＩＲＧＡＮＯＸ
１．０７６（チバガイパー■製）の粉末０．８重量
部また７重量部をヘンシェルミキサーで攪拌混合し、２
軸押出機にて溶融混練りし、ベレットを得、このベレッ
トを用いて射出成形機で試験片を作成しようとしたが７
重量部の方はスクリューに食い込まず試験片を得ること
ができなかった。Also available as polyacetal (Ultraform) 123
Add IRGANOX as a lubricant to 100 parts by weight of Delrin 20 (manufactured by BA, SF) or Delrin 11 (manufactured by DuPont).
0.8 parts by weight or 7 parts by weight of powder of 1.076 (manufactured by Ciba Geiper ■) were stirred and mixed with a Henschel mixer, and 2
I melted and kneaded it in a shaft extruder to obtain a pellet, and tried to use this pellet to make a test piece in an injection molding machine, but 7
The weight part did not bite into the screw and a test piece could not be obtained.
それぞれの配合及び測定結果を表１、また第１図、第２
図に表１における比較例４と比較例５の血圧と動摩擦係
数の関係を示す。The respective formulations and measurement results are shown in Table 1, as well as Figures 1 and 2.
The figure shows the relationship between the blood pressure and the coefficient of dynamic friction in Comparative Examples 4 and 5 in Table 1.
以 下 余 白
表１、図１、図２かられかるように、実施例１〜６は比
較例２．３と比べ限界Ｐｖ値、最小動摩擦係数、限界摩
耗係数が飛躍的に向上している。また、比較例１．２で
はＩＲＧＡＮＯＸ １０７６の配合機を０．８重量部
としたために試験片の摩擦・摩耗特性の著しい向上は見
られず、更に比較例３では７重量部としたために射出成
形機のスクリューに貴い込まなかった。このことは、本
発明の１〜５重量部という規制範囲の妥当性を示してい
る。As can be seen from Table 1, Figures 1 and 2 below, Examples 1 to 6 have dramatically improved limit Pv values, minimum dynamic friction coefficients, and limit wear coefficients compared to Comparative Examples 2.3. . In addition, in Comparative Example 1.2, the compounding machine for IRGANOX 1076 was used at 0.8 parts by weight, so no significant improvement in the friction and wear characteristics of the test piece was observed. It did not get into the screw of the machine. This shows the validity of the regulatory range of 1 to 5 parts by weight of the present invention.
また、ポリアセタール樹脂に前記のような化合物を含有
させることによって摩擦・摩耗特性のみならず、成形時
の熱安定性をも向上させることができる。ここで前述の
実施例４と実施例６、また比較例５のポリアセタール樹
脂組成物の加熱時間と重量保持率の関係を第３図に示す
。尚、試験方法は次のとおりである。Furthermore, by incorporating the above-mentioned compounds into the polyacetal resin, not only the friction and wear characteristics but also the thermal stability during molding can be improved. Here, the relationship between the heating time and weight retention of the polyacetal resin compositions of Examples 4 and 6 and Comparative Example 5 described above is shown in FIG. The test method is as follows.
約１ｇのベレットを時計皿に測りとり、オーブン中にて
１９０℃で加熱し、３時間ごとにオーブンから時計皿を
取り出し１時間放冷した後に重量を測定した。それぞれ
の経過保持率は次式によって計算した。Approximately 1 g of beret was weighed onto a watch glass, heated in an oven at 190°C, and the watch glass was removed from the oven every 3 hours and left to cool for 1 hour before its weight was measured. Each retention rate was calculated using the following formula.
重量保持率＝加熱後丑だ′。重！！−ｘ１ｏ。Weight retention rate = Ushida after heating. Heavy! ! -x1o.
初期のベレットの重量
第３図かられかるように重量保持率は比較例５に対し実
施例４と実施例６において高い数値を示しており、熱安
定性が向上している。Initial weight of pellet As can be seen from FIG. 3, the weight retention rate is higher in Examples 4 and 6 than in Comparative Example 5, indicating that the thermal stability is improved.
（効果）
以上のように本発明によれば、アルキル基（−ＣｎＨ２
ｎ＋１、ｎ＝１０〜３０）とエステル結合を含んだ潤滑
剤１〜５重量部をポリアセタール樹脂中に均一に分散さ
せ含有せしめることによって加工時のスクリュー食い込
み性、熱安定性に優れ、限界Ｐｖ値が大きく摩擦・摩耗
特性の優れたポリアセタール成形品を得ることができる
。(Effects) As described above, according to the present invention, the alkyl group (-CnH2
By uniformly dispersing and containing 1 to 5 parts by weight of a lubricant containing n + 1, n = 10 to 30) and ester bonds in polyacetal resin, it has excellent screw penetration properties and thermal stability during processing, and has a limit Pv value. It is possible to obtain polyacetal molded products with large friction and wear properties.
第１図は実施例１と比較例３の血圧と動摩擦係数の関係
を示す図、第２図は実施例７と比較例７と比較例３の面
圧と動摩擦係数の関係を示す図であり、第３図は実施例
４と実施例６と比較例５の加熱時間と重量保持率の関係
を示す図である。FIG. 1 is a diagram showing the relationship between blood pressure and kinetic friction coefficient in Example 1 and Comparative Example 3, and FIG. 2 is a diagram showing the relationship between surface pressure and kinetic friction coefficient in Example 7, Comparative Example 7, and Comparative Example 3. , FIG. 3 is a diagram showing the relationship between the heating time and the weight retention rate of Example 4, Example 6, and Comparative Example 5.
Claims (1)
ャリブチル基か又はメチル基、ｎは１０〜３０の整数で
ある。） で表される潤滑剤１〜５重量部含有せしめた摩擦・摩耗
特性の優れたポリアセタール樹脂組成物。[Claims] 1. 100 parts by weight of polyacetal resin has the following general formula, ▲mathematical formula, chemical formula, table, etc.▼ (In the formula, R_1 is a tert-butyl group, R_2 is a tert-butyl group or a methyl group, A polyacetal resin composition containing 1 to 5 parts by weight of a lubricant represented by (n is an integer of 10 to 30) and having excellent friction and wear properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8839389A JPH02265947A (en) | 1989-04-07 | 1989-04-07 | Polyacetal resin composition having excellent in friction and abrasion property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8839389A JPH02265947A (en) | 1989-04-07 | 1989-04-07 | Polyacetal resin composition having excellent in friction and abrasion property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02265947A true JPH02265947A (en) | 1990-10-30 |
Family
ID=13941552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8839389A Pending JPH02265947A (en) | 1989-04-07 | 1989-04-07 | Polyacetal resin composition having excellent in friction and abrasion property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02265947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH068326U (en) * | 1992-07-08 | 1994-02-01 | 株式会社椿本チエイン | Flat top conveyor chain |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4888136A (en) * | 1972-02-26 | 1973-11-19 |
-
1989
- 1989-04-07 JP JP8839389A patent/JPH02265947A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4888136A (en) * | 1972-02-26 | 1973-11-19 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH068326U (en) * | 1992-07-08 | 1994-02-01 | 株式会社椿本チエイン | Flat top conveyor chain |
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