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CN-122003491-A - PAEK ultrafine powder as lubricant additive

CN122003491ACN 122003491 ACN122003491 ACN 122003491ACN-122003491-A

Abstract

The present invention relates to PAEK particles for use as lubricant additives.

Inventors

  • KILLIAN PATRICK
  • F. SCHUBERT
  • G. SCHMIDT
  • MOELLER CHRISTINE
  • M. Smolka

Assignees

  • 赢创运营有限公司

Dates

Publication Date
20260508
Application Date
20241011
Priority Date
20231013

Claims (13)

  1. 1. Use of a lubricant comprising PAEK particles having a particle size D 50 of at most 20 μm, as determined by laser diffraction particle size analysis according to ISO 13320:2020, for lubrication between at least two surfaces, wherein at least one surface is non-metallic, wherein At least one of said nonmetallic surfaces comprises or consists of plastic, while at least one of the other surfaces comprises or consists of metal, or At least two of said nonmetallic surfaces comprise or consist of plastic, while at least two of the other surfaces comprise or consist of metal, or All non-metallic surfaces comprising or consisting of plastic, while all other surfaces comprising or consisting of metal, or Exactly two surfaces, one of which comprises or consists of plastic and the other of which comprises or consists of metal.
  2. 2. Use according to claim 2, wherein the plastic comprises or consists of Polyetheretherketone (PEEK) and/or comprises or consists of Polyoxymethylene (POM) and/or comprises or consists of UHMWPE (ultra high molecular weight polyethylene) and/or comprises or consists of PA66 and/or comprises or consists of PA6G (cast polyamide 6) and/or comprises or consists of PA12G (cast polyamide 12) and/or comprises or consists of PPA in each case.
  3. 3. The use according to any one or more of the preceding claims, wherein the lubricant comprises a thickener, preferably a soap thickener, preferably selected from the group consisting of lithium soaps, lithium complex soaps, aluminum complex soaps, calcium complex soaps and combinations thereof.
  4. 4. The use according to claim 5, wherein the lubricant comprises a soap thickener comprising or consisting of lithium soap or lithium complex soap.
  5. 5. Use according to claim 5 or 6, wherein the lubricant contains a thickener, preferably a soap thickener, in an amount of about 2% to about 20% by weight based on the total weight of the lubricant.
  6. 6. Use according to any one or more of the preceding claims, wherein the lubricant comprises a base oil, preferably selected from mineral oils, synthetic oils, vegetable oils and combinations thereof.
  7. 7. The use of claim 8, wherein the lubricant comprises a base oil in an amount of about 65 wt% to about 90 wt% based on the total weight of the lubricant.
  8. 8. The use according to any one or more of the preceding claims, wherein the lubricant comprises an additive, preferably selected from antioxidants, metal deactivators, corrosion inhibitors, extreme pressure additives, antiwear additives, solid lubricants, adhesion additives, dyes and combinations thereof.
  9. 9. The use of claim 10, wherein the lubricant contains an additive in an amount of greater than 0wt% to about 15 wt% based on the total weight of the lubricant.
  10. 10. The use according to any one or more of the preceding claims, wherein The particle size D 50 of the PAEK particles is 5.+ -.4. Mu.m, 5.+ -.3. Mu.m, 5.+ -.2. Mu.m, or 5.+ -.1. Mu.m; Or (b) The particle size D 50 of the PAEK particles is 10.+ -.4. Mu.m, 10.+ -.3. Mu.m, 10.+ -.2. Mu.m, or 10.+ -.1. Mu.m; Or (b) -The lubricant contains PAEK particles in an amount of more than 0 wt% to about 15 wt%, based on the total weight of the lubricant, and/or the PAEK particles have a particle size D 50 of at most 12 μm; Or (b) The lubricant contains PAEK particles in an amount of more than 0 to about 7 wt%, based on the total weight of the lubricant, and/or the PAEK particles have a particle size D 50 of 2 to 12 μm, preferably 2 to 8 μm; Or (b) The lubricant contains PAEK particles in an amount of about 0.25 to about 3.5 wt%, based on the total weight of the lubricant, and/or the PAEK particles have a particle size D 50 of 3 to 12 μm, preferably 4 to 11 μm, more preferably 4 to 6 μm; Or (b) The lubricant is a grease, preferably containing a soap thickener comprising or consisting of lithium soap or lithium complex soap, and/or the grease contains PAEK particles, preferably in an amount of about 0.25 to about 3.0 wt%, based on the total weight of the grease, and/or the particle size D 50 of the PAEK particles is preferably 3 to 5.5 μm.
  11. 11. The use according to any one or more of the preceding claims, wherein The PAEK particles are selected from the group consisting of PEK particles, PEEK particles, PEEKK particles, PEKK particles, PEEKEK particles, PEEEK particles, PEDEK particles and mixtures thereof, preferably from the group consisting of PEEK particles, PEK particles, PEKK particles and mixtures thereof, or -The PAEK particles are PEEK particles.
  12. 12. Use of a lubricant as defined in any one or more of the preceding claims for lubrication between at least two surfaces as defined in any one or more of the preceding claims, said surfaces being located in or on a vehicle and/or in or on a machine element, wherein the vehicle is preferably an automobile and/or the machine element is preferably a gear or bearing.
  13. 13. Use of PAEK particles having a particle size D 50 of at most 20 μm, preferably at most 12 μm or at most 8 μm or at most 6 μm for improving the tribological properties of a lubricant for lubrication between at least two surfaces as defined in any one or more of claims 1 to 11, preferably the tribological properties being interactions and in terms of friction coefficient, wear and/or desired lubrication between surfaces as defined in any one or more of claims 1 to 11 in relative motion.

Description

PAEK ultrafine powder as lubricant additive The present invention relates to the use of PAEK particles as a lubricant additive, in particular a grease additive. The generic term Polyaryletherketone (PAEK) refers to a series of high performance polymers with excellent thermo-mechanical properties. Such polymers contain aromatic rings that are linked predominantly to entirely through oxygen atoms (ethers) and carbonyl groups (ketones). Their properties depend mainly on the ether/ketone ratio. In the abbreviation of PAEK family member names, the letter "E" denotes ether functionality and the letter "K" denotes ketone functionality. In the following description, these abbreviations are optionally used in place of the usual names to refer to the compounds they refer to. The PAEK family includes, inter alia, polyetherketone (PEK), polyetheretherketone (PEEK), polyetheretherketone (PEEKK), polyetherketoneketone (PEKK), polyetheretherketone (PEEKEK), polyetheretherketone (PEEEK) and polyetherdiphenylether ketone (PEDEK). PAEK preferably comprises units of the formula: (-Ar-X-) and (-Ar 1 -Y-), Wherein Ar and Ar 1 each represent a divalent aromatic group, ar and Ar 1 may be preferably selected from the group consisting of 1, 3-phenylene, 1, 4-phenylene, 4' -biphenyl, 1, 4-naphthylene, 1, 5-naphthylene and 2, 6-naphthylene, X represents an electron withdrawing group which may preferably be selected from the group consisting of carbonyl and sulfonyl, and Y represents a group selected from the group consisting of an oxygen atom, a sulfur atom, an alkylene group (e.g., -CH 2 -) and isopropylidene. In a preferred embodiment, at least 50%, preferably at least 70%, especially at least 80% of the X groups are carbonyl groups and at least 50%, preferably at least 70%, especially at least 80% of the Y groups are oxygen atoms. In another preferred embodiment, 100% of the X groups are carbonyl groups and 100% of the Y groups are oxygen atoms. In a preferred embodiment, the PAEK particles are PEKK particles, preferably comprising structural units of formula Ia, ib and/or mixtures thereof: (Ia), (Ib)。 in a preferred embodiment, the PAEK particles are PEEK particles, preferably comprising structural units of formula IIa: (IIa)。 the PEEK particles may contain para sequences of formula IIb: (IIb)。 The sequence may be fully para, but meta sequences according to formulae (III) and/or (IV) may also be introduced partially or fully: (III), (IV), or ortho-sequences according to formula V (V)。 In a preferred embodiment, the PAEK particles are PEK particles, preferably comprising structural units of formula VI: (VI)。 the sequence may be fully para, but meta sequences (formulas VII and VIII) may also be partially or fully introduced: (VII), (VIII)。 in a preferred embodiment, the PAEK particles are peek particles, preferably comprising structural units of formula IX: (IX)。 in a preferred embodiment, the PAEK particles are PEEEK particles, preferably comprising structural units of formula X: (X)。 Meta sequences can be introduced in these structures at the ether and ketone, but bisphenol sequences according to formula XI can also be introduced: (XI)。 the indices "x", "y" and "n" are each preferably integers of at least 50 or at least 100, preferably from 150 to 950, particularly preferably from 150 to 500. Residues ". The residues". Sur are each preferably-H, branched or unbranched, unsubstituted-C 1-10 -alkyl, or unsubstituted or mono-or di-substituted aryl, each branched or unbranched, unsubstituted-C 1-10 -alkyl or-OC 1-10 -alkyl. PAEK powders are well known to those skilled in the art and are commercially available. Lubricants, in particular greases and lubricating oils, are well known per se and are widely used. Grease, sometimes referred to as "grease", is a solid to semi-liquid substance formed by a thickener (or thickener) dispersed in a liquid lubricant (base liquid). Other additives (additives) imparting particular properties may be included. The basic consistency of the grease depends on the combination of base liquid and thickener. The base fluid is typically a base oil commonly used in the lubrication industry, such as mineral, synthetic or vegetable oil. The thickener used includes, for example, alkali metal soaps or alkaline earth metal soaps. Non-soap-based thickeners are also known, such as bentonite (clay-based) or polyurea. Lubricants, in particular greases and lubricating oils, may be produced by batch processes or by continuous processes. Lubricants and methods for their production are known in the art and are commercially available in the form of a variety of compositions. Lubrication of machine elements (e.g., gears or bearings) presents special challenges in terms of wear and friction. For this purpose, different additives are used in lubricants, in particular greases and lubricating oils, in order to improve both main properties or to meet the requirements thereof, among others. The frictional contact is also affected