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WO2017178881A1 - Palier à couverture polymère pour réduction de contrainte dans des moteurs à combustion interne et son procédé de production - Google Patents

Palier à couverture polymère pour réduction de contrainte dans des moteurs à combustion interne et son procédé de production Download PDF

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Publication number
WO2017178881A1
WO2017178881A1 PCT/IB2017/000430 IB2017000430W WO2017178881A1 WO 2017178881 A1 WO2017178881 A1 WO 2017178881A1 IB 2017000430 W IB2017000430 W IB 2017000430W WO 2017178881 A1 WO2017178881 A1 WO 2017178881A1
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Prior art keywords
silane
silanes
bronzine
minutes
polymeric coating
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Ceased
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English (en)
Portuguese (pt)
Inventor
Márcia Gomes DE OLIVEIRA
Djanira Maria de Rezende COSTA
Fernanda Cristina DE SOUZA COELHO DOS SANTOS
Ellen GUIMARAES OLIVEIRA GRANCE
Denise DE SOUZA FREITAS
Lisiane GONCALVES LIMA
Cassio BARBOSA
Ibrahim DE CERQUEIRA ABUD
Matheus DE SANTOS FERREIRA
Sandra MATOS CORDEIRO COSTA
Paulo Roberto VIEIRA DE MORAIS
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INSTITUTO NACIONAL DE TECNOLOGIA
Mahle Metal Leve SA
Mahle International GmbH
Original Assignee
INSTITUTO NACIONAL DE TECNOLOGIA
Mahle Metal Leve SA
Mahle International GmbH
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Application filed by INSTITUTO NACIONAL DE TECNOLOGIA, Mahle Metal Leve SA, Mahle International GmbH filed Critical INSTITUTO NACIONAL DE TECNOLOGIA
Publication of WO2017178881A1 publication Critical patent/WO2017178881A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0065—Heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/48—Preparation of the surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/48—Preparation of the surfaces
    • B29C63/486—Preparation of the surfaces of metal surfaces
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C08G73/14—Polyamide-imides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/002—Priming paints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/48—Preparation of the surfaces
    • B29C2063/483—Preparation of the surfaces by applying a liquid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/12—Organo silicon halides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups

Definitions

  • the present invention relates to the field of friction in combustion engines. More specifically, the present invention relates to the polymeric coated friction bearing bearing in internal combustion engines. Additionally, the present invention relates to the process for the production of polymeric coated bearing friction bearings in internal combustion engines.
  • the present invention relates to the process of coating aluminum or bronze alloy bearings consisting of: a first step of degreasing the metal surface using water, neutral detergent and organic solvent; a second step of basic surface activation with sodium hydroxide solution; a third stage of pretreatment of the metal surface with hydroalcoholic solutions of mono and bifunctional silanes, aiming at the formation of a polysiloxane film with the anchoring function of the polymeric coating, subsequently applied to the bronzine surface; a fourth step of condensation of silanes for polysiloxane film formation; a fifth step of applying the polymeric coating comprising poly (amide imide), poly (tetrafluoroethylene) and aluminum flakes; and a sixth heat curing step of the polymeric coating applied to the bearing.
  • the composition of the mono and bifunctional hydroalcoholic solutions of silanes were also an object of development of this invention, as well as the time and temperature conditions of cure for polysiloxane film formation. Background of the invention
  • Adherence of polymeric coatings to metallic surfaces requires their activation.
  • This activation can be chemical, usually by basic attacks, acid attacks, phosphating, chroming and also by the deposition of oxides via sol-gel, whose main function is to generate chemically active groups and roughness that favor the adhesion of a polymeric coating.
  • There is also mechanical activation usually by blasting the metal surface with oxides, which mainly promotes the roughness of the metal surface providing physical anchor points of the polymeric coating.
  • polymer-coated aluminum or bronze bearings generally have their surface activated by oxide blasting prior to the application of such a coating. This operation has as its main drawback the generation of residues on the metal surface, which can subsequently cause premature coating failure. By replacing this step with silane pretreatment, it is possible to promote chemical adhesion of the polymeric coating, eliminating the problem of blasting residue deposition and possible premature engine failure of the bearing.
  • metal oxides and hydroxides may compromise the mechanical and electrical stability of the assembly. This formation is particularly pronounced in shy environments.
  • aluminum its surface is naturally protected by a thin layer of oxide which provides passivation to the metal at room temperature and moderate relative humidity. Exposure to higher temperature and humidity induces the transformation of aluminum oxide into aluminum oxide hydroxide (AIO (OH)) and finally, if the transformation is complete, to aluminum hydroxide. aluminum (Al (OH) 3 ).
  • Changes in the chemical composition of the surface are accompanied by changes in the original morphology of the thin oxide layer to a flake structure and finally to a plate structure. These changes are associated with layers that are mechanically weaker and non-passivated. As it is possible to change the thickness of the oxide layer by these transformations, the mechanical integrity of the coating interface becomes weaker and may lead to mechanical separation between the substrate and the coating.
  • Changing the roughness of the metal surface is a device for improving the adhesion of polymeric coatings and thus achieving structural durability in humid or corrosive environments.
  • the most common practices for inserting or accenting surface roughness are: blasting, chemical activation or anodizing and each technique has its limitations.
  • Such coupling agents are organo silanes, organo titanates and organo zirconates.
  • these compounds have a terminal group capable of reacting with one or more polymer families, examples of such groups are amino, mercapto and epoxy.
  • these compounds have one or more groups capable of binding to the metal substrate, such as alkoxy, aryloxy or halides.
  • organo silanes are the most studied and have the largest number of developed applications.
  • Silanes are hybrid molecules containing functional organic groups such as methoxy and ethoxy bonded to the silicon atom. Some types of silanes have other functional groups besides those already mentioned, especially chlorine, amine, sulfur and epoxide. These are called functional silanes, in which additional functional groups promote adhesion with organic films, such as coating paints.
  • silanes do not require the metal to participate electrochemically in the deposition mechanism of the metal. movie.
  • the curing of the silane layer is considered essential considering its purpose of anti-corrosion protection. Heating of the coated substrates results in crosslinking between the silane molecules within the deposited film.
  • Silanol groups which have not reacted with the metal surface, are condensed to form Si-O-Si siloxane chains.
  • Crosslinking and branching produce dense networks which limit electrolyte access to the adjacent metal surface and thus form an effective barrier against corrosive attack.
  • Infrared spectra showed an increase in the absorption band relative to the Si-O-Si group, while the band relative to the Si-OH group has its absorption reduced by the curing process.
  • the initially formed silane film is densified and shrunk by curing as shown by ellipsometry data, resulting in barrier properties according to electrochemical impedance spectroscopy data.
  • BTSE Bis-1,2- (triethoxysilyl) ethane
  • the aqueous solution has less monomer and more condensed polymers, which affects the structure of the silane layer deposited on the metal.
  • the silane layer from the aqueous solution already has polymerized species. Electron microscopy images revealed similarities between the two silane films, but the properties of the layers may be affected otherwise. The cure kinetics of these films will be different, since crosslinking has already begun in advance in the aqueous solution and thus larger species can combine, which is important regarding the barrier property of the film. Therefore, after a short curing time the barrier performance of the BTSE aqueous solution film is superior. Indeed, the results of electrochemical impedance spectroscopy reveal this behavior ⁇ DE GREAVE et al., Progress in Organic Coatings 63, 38-42. 2008).
  • the aluminum was previously sanded, washed with distilled water, degreased with acetone, activated in basic medium and washed again before immersion in methanolic solution of the organo silanes. Curing was performed at 100 ° C for 1 hour (FRIGNANI et al, Corrosion Science 48, 2258-2273. 2006).
  • CORREA-BORROEL et al. (Journal of Applied Electrochemistry 39, 2385-2395. 2009) evaluated the effect of alkyl radical size of non-functional organo silanes on AA2024 deposited films (92.5% Al) and with organic coating adjacent polypyrrole.
  • the organosilanes studied were propyl (C3), octyl (C8) and octadecyl (C18) trimethoxysilane.
  • the silane film was deposited by immersion in methanolic solution and cured at 80 ° C for 1 hour. Polypyrrole coating was performed by electroplating. The aluminum surface has been previously sanded and degreased.
  • COMYN is a contributor ⁇ International Journal of Adhesion & Adhesives 20, 77-82. 2000) compared the pretreatment of aluminum joints with glycidoxypropyltrimethoxysilane (GPTMS), 3-aminopropyltrimethoxysilane (APES) and phosphoric acid anodization (PAA).
  • the aluminum used was AA1050 (99.5% Al), which was degreased with methyl ethyl ketone (MEK).
  • Silane films were deposited by immersion in 2% aqueous GPTMS or APES solution and drying at room temperature. Anodizing with phosphoric acid was performed in a bath with phosphoric acid solution (10%). at 10V in a stainless steel tank that worked as a cathode and drying was performed at room temperature. After pretreatment, the amine-functionalized nitrile-copolymer-based copolymer sealant was applied.
  • Both of the silanes chosen are functional, that is, they have groups capable of chemically reacting with the sealant, forming an interface with aluminum through covalent chemical bonds, since the silanols groups react with the metal surface and the epoxy group.
  • GPTMS reacts with nitrile rubber amino groups
  • APES amino groups react with epoxy resin.
  • the use of both GPTMS and APES promoted an increase in adhesion strength, as observed for PAA.
  • the resistance to fluids such as gasoline, water and water and antifreeze has been improved, ie the joints have retained their adhesion strength for up to 15 weeks of immersion in said fluids (COMYN et al. International Journal of Adhesion & Adhesives 20, 77-82, 2000).
  • EPI 097259 owned by the University of Cincinnati (2005), addresses the use of silane polysulfide solutions to obtain protective films deposited on a wide range of metal substrates, including zinc, copper, aluminum and their alloys.
  • the solvent of these solutions is a mixture of alcohol and water, the pH around 4 and the silane concentration in the range of 1 to 5%.
  • Film deposition may be by immersion, spray or other conventional technique. The results obtained after immersion in NaCl solution for 100h were exceptional for substrates coated with silane films.
  • Patent US6827981 also owned by the University of Cincinnati, discloses a mixture of functional organo silanes, more specifically vinyl silane and bis-silyl amino silane, for the deposition of protective films on zinc substrates and their leagues. These films do not need to be removed for subsequent applications of paints, adhesives and other polymeric layers, rather they act to favor the anchoring of these coatings.
  • the solutions containing the functional organosilanes are preferably aqueous, but also contain organic solvents of the alcohol class to increase the solubility of hydrolysed silanes.
  • the pH of the solution may range from 4 to 10, depending on the ratio of vinyl silane to bis-silyl amino silane, preferably around 4.
  • the metal substrate should be solvent cleaned or chemically activated in alkaline medium.
  • Film deposition may be by immersion, spray or any other technique and drying is performed at 90 ° C for 1 hour.
  • the protection mechanism is the establishment of a dense polymeric network formed by the inter and intra silane reaction, as well as an effective anchorage on the metal surface due to the action of Si-OH silanols, which chemically bind to the Si-OM metal surface. .
  • EP 1153089 filed by Chemetall PLC (2007), follows the same line as the University of Cincinnati patent, combining vinyl silane with bis silyl silane in aqueous / alcoholic solutions.
  • the range of metallic substrates was expanded with the insertion of steel, iron and aluminum. Deposition was also performed by methods known as dipping or spraying. Drying is performed at 40 to 180 ° C for sufficient time.
  • the proposed mechanism is exactly the same as in the previous patent, that is, the creation of a dense polymer network by the reaction between the silanes, with the affinity of bis-silyl silane for the metal surface being higher compared to vinyl silane.
  • BEXELL and OLSSON evaluated the use of functional and non-functional organo-silane mixtures for the formation of films on aluminum, zinc and aluminum and zinc alloys.
  • ol, 2-bis (triethoxysilyl) ethane (BTSE) and mercaptopropilt imethoxysilane (MPS) were chosen.
  • the deposition was performed by two-step immersion, the first being immersion in BTSE solution and the second in MPS solution, both containing methanol and water in the ratio 60%: 40%.
  • the variables of this study were bath pH and metallic substrate composition. The surface of the metals was previously polished, degreased and activated in alkaline medium. After immersion the substrates were dried under inert atmosphere flow.
  • ToF-SIMS Fluorescence SIMS or Static SIMS
  • BTSE Light Time SIMS or Static SIMS
  • MPS Static SIMS
  • the presence of HSi x O y - negative ions indicates that the two silanes formed a highly crosslinked Si-O-Si bonded film.
  • the two-step treatment resulted in a bilayer film, the upper one consisting primarily of MPS.
  • the thickness of this bilayer film was lower than the film obtained by BTSE deposition only, suggesting that part of the BTSE is dissolved during the immersion step in the MPS solution in the two-step process.
  • the MPS mercapto group was not oriented outside the molecule, which would be of interest for the deposition of a third layer of another organic substance (Surface and Interface Analysis 35, 880-887. 2003).
  • bearings have their surfaces mechanically activated with oxide blasting, which increases the surface roughness, providing physical anchor points, as well as favoring the formation of an aluminum oxide layer, which in contact with Moisture from the air generates aluminum hydroxide, which contributes to the chemical anchoring of the poly (amide imide) coating which contains in its formulation a mixture of mono and bis silane.
  • the blasting has the disadvantage of accumulating tiny particles of oxide on the surface of the bearing, which result in premature failure of the part, as they impair the adhesion of the coating.
  • Such surface dirt significantly impairs load capacity. Since the bearing is a hydrodynamic bearing, any dirt breaks the oil film leading to scratches and potential locking and rapid degradation of the part.
  • the present invention relates to the polymeric coated friction bearing bearing in internal combustion engines. Additionally, the present invention relates to the process for the production of polymeric coated bearing friction bearings in internal combustion engines.
  • the present invention relates to the process of coating aluminum or bronze bearings consisting of a first step of degreasing the metal surface using water, neutral detergent and organic solvent; a second step of basic activation of the bearing surface with aqueous sodium hydroxide solution; a third stage of pretreatment of the metal surface with hydroalcoholic solutions of mono and bifunctional silanes, aiming at the formation of a polysiloxane film with the anchoring function of the polymeric coating, subsequently applied to the bronzine surface; a fourth step of condensation of silanes for polysiloxane film formation; a fifth step of applying the polymeric coating comprising poly (amide imide), poly (tetrafluoroethylene) and aluminum flakes; and a sixth heat curing step of the polymeric coating applied to the bearing.
  • the composition of mono and bifunctional silane hydroalcoholic solutions has also been developed in this invention, as well as the curing time and temperature conditions for polysiloxane film formation.
  • Bronzes are produced by the process of casting a bronze alloy on a steel strip or by rolling together (clamping) between one aluminum alloy strip and another steel strip, subsequent stamping and finishing machining to the curved final shape.
  • a basic activation with 0.5M aqueous sodium hydroxide solution is made. This activation is accomplished by soaking the bronzine in an aqueous sodium hydroxide solution bath having a molar concentration between 0.05 and 1M, more preferably 0.5M, for up to 15 minutes, more preferably 5 minutes. The bronzine is then rinsed thoroughly with distilled water and blown dry. This activation has the function of generating hydroxyl groups on the aluminum surface, capable of chemically reacting with the organo silanes via hydrolysis mechanism.
  • the chemically activated aluminum or bronze bronzes are immersed in a bath with hydroalcoholic organo silanes solution at room temperature for up to 5 minutes, more preferably 2 minutes.
  • the solvent pair of the hydroalcoholic solution is water is an hydrocarbon chain alcohol of up to 4 carbons, more preferably 2 carbons, and the water / alcohol ratio may range from 10% / 90% to 90% / 10%, more preferably 50% / 50%. This bath should be kept under constant agitation.
  • the organo silanes used may be mono silanes, bis silanes or a mixture of both, being hybrid molecules containing hydroxyl groups or functional organic groups such as methoxy and ethoxy, bonded to the silicon atom and other functional groups besides already cited highlighting chlorine, amine, sulfur and epoxide.
  • the concentration of the organo silane or the organo silane mixture may range from 4% to 8% by volume in the hydroalcoholic solution, more preferably 4%.
  • the organo-silane hydroalcoholic solution should remain under gentle and constant stirring for up to 60 minutes, more preferably 30 minutes, before starting to soak the bronzines in order to hydrolyze the alkoxy groups with the formation of the groups.
  • hydroxyl which are responsible for the chemical interaction with the bronzine metal surface (aluminum or bronze) and later for the formation of the polysiloxane film during curing.
  • the hydroalcoholic immersion bath may contain only a monosilane or a mixture of monosilanes or a mixture of mono and bis silanes.
  • organo silanes whether mono or bis silanes, may vary from 95% / 5% to 80% / 20% by volume.
  • the soaking of the bearings is performed at room temperature for up to 6 minutes, more preferably 2 minutes.
  • the bronzines are dried with an air blower, following to the curing step in an oven heated by electric resistances or infrared lamps at a temperature of 80 to 120 ° C, plus preferably 100 ° C.
  • the healing time is Depending on the temperature and heat source of the oven, when this is electrical resistance the curing period may vary up to 120 minutes and when this is medium wavelength IR lamp the curing period may vary up to 30 minutes so that it occurs. the condensation of silanols with the formation of polysiloxane film.
  • the polymeric coating composed of the mixture poly (amide imide), poly (tetrafluoroethylene) and aluminum in solvent of N-ethyl pyrrolidone is sprayed to the bronzine on the polysiloxane layer with thickness between 6 and 20 ⁇ , more specifically 12 ⁇ .
  • said coating applied to the aluminum or bronze bearing is cured in a heated oven with electric resistors or infrared lamps at a temperature of 160 ° C for up to 120 minutes.
  • Example 1 Use of ⁇ -glidoxypropyl trimethoxy silane (GPTES) as precursor of polysiloxane film
  • Aluminum bronzes were cleaned in three steps, namely: (i) washing with distilled water; (ii) washing with neutral detergent; (iii) washing with methylene chloride in an ultrasonic bath for 10 minutes.
  • the bearings were chemically activated by soaking in 0.5M sodium hydroxide solution for 5 minutes and then washed with distilled water.
  • the bearings After drying, with the aid of a cold air dryer, the bearings were immersed for 2 minutes in GPTES solution in a 1: 1 ethanol / water mixture with 4% (v / v) organo-silane concentration. Then the bearings They were dried with the aid of a cold air dryer and placed in a conventional oven (heat source: electrical resistance) heated at 100 ° C for 30 minutes to form the polysiloxane film.
  • heat source electrical resistance
  • Example 2 Use of the mixture of (3-aminopropyl) triethoxy silane (APTES) with bis- ( ⁇ -trimethoxysilylpropyl) amine (BTSPA) as precursor of polysiloxane film
  • APTES (3-aminopropyl) triethoxy silane
  • BTSPA bis- ( ⁇ -trimethoxysilylpropyl) amine
  • Aluminum bronzes were cleaned in three steps, namely: (i) washing with distilled water; (ii) washing with neutral detergent; (iii) washing with methylene chloride in an ultrasonic bath for 10 minutes.
  • the bearings were chemically activated by soaking in 0.5M sodium hydroxide solution for 5 minutes and then washed with distilled water.
  • the bearings were immersed for 2 minutes in a 9: 1 APTES / BTSPA mixture solution in a 1: 1 ethanol / water mixture with a 4% (v / v) organo-silane concentration. v). Then the bearings were dried with the aid of a cold air dryer and conditioned in a conventional oven (heat source: electrical resistance) heated at 100 ° C for 30 minutes for the formation of polysiloxane film.
  • heat source electrical resistance
  • Example 3 Use of the mixture ⁇ -glidoxypropyl trimethoxy silane (GPTES) with tetraethoxy silane (TEOS) as a precursor of polysiloxane film
  • GPTES ⁇ -glidoxypropyl trimethoxy silane
  • TEOS tetraethoxy silane
  • Aluminum bronzines were cleaned in three steps, namely: (i) washing with distilled water; (ii) washing with neutral detergent; (iii) washing with methylene chloride in an ultrasonic bath for 10 minutes.
  • the bearings were chemically activated by soaking in 0.5M sodium hydroxide solution for 5 minutes and then washed with distilled water.
  • the bearings were immersed for 2 minutes in a GPTES / TEOS 9: 1 mixture solution in a 1: 1 ethanol / water mixture with 4% organo-silane concentration. (v / v). Afterwards, the bearings were dried with the aid of a cold air dryer and placed in a conventional oven (heat source: electrical resistance) heated at 100 ° C for 30 minutes for the formation of polysiloxane.
  • heat source electrical resistance
  • a polymeric coating composed of the mixture poly (amide imide), poly (tetrafluoroethylene) and aluminum in a 12 ⁇ thick N-ethyl pyrrolidone solvent was sprayed. Finally, said coating applied to the aluminum bearing was cured in a conventional oven (heat source: electrical resistance) at 160 ° C for 120 minutes.

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Abstract

La présente invention concerne un palier à couverture polymère pour réduction de contrainte dans des moteurs à combustion interne. En outre, la présente invention concerne le procédé de production d'un palier à couverture polymère pour réduction de contrainte dans des moteurs à combustion interne, notamment par introduction d'une couche d'adhésion entre la surface métallique du palier et le revêtement polymère, ladite couche étant obtenue par immersion préalable du palier dans une solution hydro-alcoolique d'organo-silanes, puis par durcissement thermique, d'où la formation d'un film de polysiloxane contenant des groupes chimiques à capacités d'interactions diverses avec le revêtement polymère subséquent.
PCT/IB2017/000430 2016-04-15 2017-04-13 Palier à couverture polymère pour réduction de contrainte dans des moteurs à combustion interne et son procédé de production Ceased WO2017178881A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR1020160085233 2016-04-15
BR102016008523-3A BR102016008523A2 (pt) 2016-04-15 2016-04-15 Bronzina com cobertura polimérica para redução de atrito em motores de combustão interna e processo para a produção da mesma

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112204172A (zh) * 2018-05-28 2021-01-08 东京制纲株式会社 含锌金属基材的表面处理方法及经表面处理的含锌金属基材
EP3805426A4 (fr) * 2018-05-28 2022-03-02 Tokyo Rope Manufacturing Co., Ltd. Procédé pour le traitement de surface d'un matériau de base métallique contenant du zinc et matériau de base métallique contenant du zinc traité en surface

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WO2000046311A1 (fr) * 1999-02-05 2000-08-10 Chemetall Plc Procede de traitement des metaux faisant appel aux ureido silanes et aux silanes fonctionnels multi-silyles en adjuvant
EP2532905A1 (fr) * 2011-06-06 2012-12-12 KS Gleitlager GmbH Matériau composite pour palier lisse et élément de palier lisse fabriqué avec celui-ci

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Publication number Priority date Publication date Assignee Title
WO2000046311A1 (fr) * 1999-02-05 2000-08-10 Chemetall Plc Procede de traitement des metaux faisant appel aux ureido silanes et aux silanes fonctionnels multi-silyles en adjuvant
EP2532905A1 (fr) * 2011-06-06 2012-12-12 KS Gleitlager GmbH Matériau composite pour palier lisse et élément de palier lisse fabriqué avec celui-ci

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112204172A (zh) * 2018-05-28 2021-01-08 东京制纲株式会社 含锌金属基材的表面处理方法及经表面处理的含锌金属基材
EP3805426A4 (fr) * 2018-05-28 2022-03-02 Tokyo Rope Manufacturing Co., Ltd. Procédé pour le traitement de surface d'un matériau de base métallique contenant du zinc et matériau de base métallique contenant du zinc traité en surface

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