WO2023245269A1 - Composition pour l'adhésion de métaux à des composites, procédé d'obtention de la composition, élément de frottement, procédé pour l'obtention d'un élément de frottement et système de freinage comprenant ledit élément de frottement - Google Patents

Composition pour l'adhésion de métaux à des composites, procédé d'obtention de la composition, élément de frottement, procédé pour l'obtention d'un élément de frottement et système de freinage comprenant ledit élément de frottement Download PDF

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Publication number
WO2023245269A1
WO2023245269A1 PCT/BR2023/050209 BR2023050209W WO2023245269A1 WO 2023245269 A1 WO2023245269 A1 WO 2023245269A1 BR 2023050209 W BR2023050209 W BR 2023050209W WO 2023245269 A1 WO2023245269 A1 WO 2023245269A1
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WO
WIPO (PCT)
Prior art keywords
composition
friction component
friction
adhesion
present
Prior art date
Application number
PCT/BR2023/050209
Other languages
English (en)
Portuguese (pt)
Inventor
Joel Boaretto
Robinson Carlos Dudley CRUZ
Original Assignee
Instituto Hercílio Randon
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Instituto Hercílio Randon filed Critical Instituto Hercílio Randon
Publication of WO2023245269A1 publication Critical patent/WO2023245269A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/22—Rubbers synthetic or natural
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J101/00—Adhesives based on cellulose, modified cellulose, or cellulose derivatives
    • C09J101/02—Cellulose; Modified cellulose
    • C09J101/04—Oxycellulose; Hydrocellulose
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C09J161/12—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols with polyhydric phenols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J199/00—Adhesives based on natural macromolecular compounds or on derivatives thereof, not provided for in groups C09J101/00 -C09J107/00 or C09J189/00 - C09J197/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing

Definitions

  • the present invention is in the field of mechanical and materials engineering. More specifically, the invention discloses an adhesive composition useful for adhering metals and composites, as well as a process for obtaining it; in addition to a friction component, process for obtaining a friction component and brake system comprising said friction component.
  • the adhesion composition of the invention comprises tannic acid and one or more resins, and provides excellent adhesive properties, with improved shear strength and greater tear strength.
  • the friction component of the invention has high shear strength and high adhesion stability.
  • the friction component of the invention is a brake pad with improved performance under the most varied conditions of use of a disc brake system.
  • the friction component of the invention is a brake lining with improved performance under the most varied conditions of use of a drum brake system.
  • Patent application US9791012 describes a composition of a thermomoldable resin comprising Quebracho wood tannin extract, a furfuryl alcohol, a neoprene compound, dimethicone, polyethylene glycol, abrasive particles and an acid phosphate ester and/or graphite glycerol. Such document discloses a composition different from that disclosed in the present patent application.
  • Patent application JP2002181096A discloses a friction surface and the manufacturing method thereof, in which the friction surface is capable of stabilizing the quality of a friction material by preheating a pressure plate.
  • This friction surface is constituted by the connection of the friction material to the pressure plate, partially through the use of a cross-linked Novolaca type resin as an adhesive.
  • Such document discloses a composition different from that disclosed in the present patent application.
  • Patent application JP2017179260A discloses a friction material comprising a resin comprising phenolic resin of the Novolaca type and a lignin modified with carboxylic acid. Such document also discloses a composition different from that disclosed in the present patent application.
  • the present invention provides a new adhesive composition to provide improved adhesion of metallic materials to polymeric materials, such as, for example, non-limiting materials containing resins or composites.
  • the invention also discloses a process for obtaining said composition. Also disclosed are: a product consisting of a friction component comprising metallic material, the adhesion composition of the invention and at least one layer of polymers and/or resins; and its obtaining process. In addition to a brake system comprising the friction component of the present invention.
  • composition of the invention comprises: a diluent; a resin; tannic acid (C76H52O46); and a thickening agent or a film-forming agent.
  • the composition is presented in the form for application in a roll. In another embodiment, it is presented in the form for spray application.
  • the diluent is used in a concentration range of 25 to 75% by weight. In one embodiment of said composition, the diluent is ethanol. [0015] In one embodiment of said composition, the resin is used in a concentration range of 25 to 75% by weight. In one embodiment of said composition, the resin is a phenolic resin.
  • tannic acid is used in a concentration range of 0.5 to 15% by weight.
  • the thickener is used in a concentration range of 0.2 to 8% by weight. In one embodiment of said composition, the thickener is carboxymethylcellulose.
  • the film-forming agent is used in a concentration range of 0.4 to 9% by weight.
  • the film-forming agent is polyvinyl alcohol.
  • said process comprises the steps of:
  • said layer comprising polymers and/or resins comprises the adhesion composition of the present invention.
  • the friction component comprises a metallic substrate, the adhesion composition of the invention, and a layer comprising polymers and/or resins.
  • said component is a friction component such as a brake pad, comprising a metallic substrate (also known as a metallic plate, base or metallic shim), the adhesive and at least one layer of polymers and/or resins.
  • said component is frictional such as a brake lining.
  • a fourth object of the invention is a process for obtaining a friction component comprising the steps of:
  • a fifth object of the invention is a brake system comprising the friction component of the invention.
  • Figure 1 shows a graph with the results of shear strength tests.
  • A) the shear strength results of the normal adhesive are shown.
  • B) the shear strength results of the modified adhesive of the invention are shown, without waiting time. wait.
  • the “F” notation indicates cold shear strength and the “Q” notation indicates hot shear strength.
  • Figure 2 shows a graph with the results of shear strength tests using adhesives containing different concentrations of tannic acid: 5%, 7.5% and 10%. In all cases, the “F” notation indicates cold shear strength and the “Q” notation indicates hot shear strength.
  • Figure 3 shows a brake pad produced from the process of the present invention using the composition for adhesion under roller application.
  • the present invention provides a new adhesive composition to provide improved adhesion of metallic materials to polymeric materials, resin-containing materials or composites.
  • the invention provides an adhesive composition that increases shear strength, as well as a composite, especially a friction composite, that has improved shear strength.
  • the composition of the invention comprises: a diluent; a resin; tannic acid (C76H52O46); and a thickening agent or a film-forming agent.
  • the composition is presented in the form for application in a roll. In another embodiment, it is presented in the form for spray application. In either embodiment, viscosity adjustment is the key element to ensure proper use.
  • the diluent is present in a concentration range of 25 to 75% by weight. In one embodiment, the diluent is present in a concentration range of 30 to 70% by weight. In one embodiment, the diluent is present in a concentration range of 35 to 65% by weight. In one embodiment, the diluent is present in a concentration range of 40 to 60% by weight. In one embodiment, the diluent is present in a concentration range of 40 to 50% by weight. In one embodiment, the diluent is present in a concentration range of 40 to 47% by weight. In one embodiment of said composition, the diluent is ethanol.
  • the resin is present in a concentration range of 25 to 75% by weight. In one embodiment, the resin is present in a concentration range of 30 to 70% by weight. In one embodiment, the resin is present in a concentration range of 35 to 65% by weight. In one embodiment, the resin is present in a concentration range of 40 to 60% by weight. In one embodiment, the resin is present in a concentration range of 41 to 52% by weight. In one embodiment of said composition, the resin is a phenolic resin.
  • tannic acid is used in a concentration range of 0.5 to 15% by weight. In one embodiment, tannic acid is present in a concentration range of 1 to 12% by weight. In one embodiment, tannic acid is present in a concentration range of 2 to 10% by weight. In one embodiment, tannic acid is present in a concentration range of 3 to 10% by weight. In one embodiment, tannic acid is present in a concentration range of 4 to 10% by weight. In one embodiment, tannic acid is present in a concentration range of 5 to 10% by weight.
  • the thickener is present in a concentration range of 0.2 to 8% by weight. In an embodiment of said composition, the thickener is present in a concentration range of 0.5 to 7% by weight. In an embodiment of said composition, the thickener is present in a concentration range of 0.7 to 6% by weight. In an embodiment of said composition, the thickener is present in a concentration range of 0.9 to 5% by weight. In one embodiment of said composition, the thickener is present in a concentration range of 1.0 to 4% by weight. In one embodiment of said composition, the thickener is present in a concentration range of 1.5 to 3.5% by weight. In one embodiment of said composition, the thickener is carboxymethylcellulose.
  • the forming agent film is present in a concentration range of 0.4 to 9% by weight. In an embodiment of said composition, the film-forming agent is present in a concentration range of 0.6 to 8% by weight. In an embodiment of said composition, the film-forming agent is present in a concentration range of 0.8 to 7% by weight. In one embodiment of said composition, the film-forming agent is present in a concentration range of 1.0 to 6% by weight. In an embodiment of said composition, the film-forming agent is present in a concentration range of 2.0 to 6% by weight. In an embodiment of said composition, the film-forming agent is present in a concentration range of 3.0 to 6% by weight. In an embodiment of said composition, the film-forming agent is present in a concentration range of 4.0 to 5% by weight. In one embodiment of said composition, the film-forming agent is polyvinyl alcohol.
  • said process comprises the steps of:
  • said layer comprising polymers and/or resins comprises the adhesion composition of the present invention.
  • the friction component comprises a metallic substrate, the adhesion composition of the invention, and a layer comprising polymers and/or resins.
  • said component is a friction component such as a brake pad, comprising a metallic substrate (also known as a metallic plate, base or metallic shim), the adhesive and at least one layer of polymers and/or resins.
  • said component is frictional such as a brake lining.
  • the component is a brake pad or brake lining in which at least one layer of polymers and/or resins comprises composite.
  • said composite is a friction composite.
  • a fourth object of the invention is a process for obtaining a friction component comprising the steps of:
  • said composite is a friction or friction composite.
  • said friction or friction composite is based on phenolic resin.
  • a fifth object of the invention is a brake system comprising the friction component of the invention.
  • Example 1 Adhesive composition and production process
  • an adhesive formulation was prepared for application in the production process of friction materials (friction), more specifically brake pads, aiming to improve adhesion between a metallic substrate (also known as metallic plate, metal base or shim) and a friction material composite.
  • the technical problem to be solved was to provide adhesion stability under the most varied application conditions of the disc brake system.
  • the substrate used was metallic (metallic plate from an automotive brake system, also known as base or metallic shim), which is normally composed of plates made of different types of steel or cast iron (normally gray cast iron).
  • the polymeric or composite material that is adhered to the metallic substrate or metallic plate is the friction or friction material, which has an organic matrix with a phenolic base. This phenolic base comes from phenol-formaldehyde type resin.
  • composition of these adhesives varies depending on the application method: in the case of the form for roll application, a thickener is used, and in the case of the form for spray application, a film-forming agent is used.
  • composition was prepared with the following formulation (concentrations in % by weight): ethanol 40%; novolac phenolic resin 52%; tannic acid 5%; carboxymethyl cellulose 3%.
  • the sequence of adding the ingredients is important to avoid deposition or flocculation of its components.
  • the process comprises the steps of: - dilute/dissolve, under stirring, the tannic acid in ethanol;
  • composition was prepared with the following formulation (concentrations in % by weight): ethanol 47%; novolac phenolic resin 41%; tannic acid 7%; 5% polyvinyl alcohol.
  • the process comprises the steps of:
  • the process may include an additional step of adding dye, in which case this step is done directly on the solvent used in the first step (ethanol in the above embodiments), before adding the tannic acid.
  • the pressure ranges used during the forming process of the composite formed from the friction material for adhesion to the metallic substrate vary from 200 to 2000 kgf/cm 2 .
  • the temperature ranges used during the forming process of the composite forming the friction material for adhesion to the metal substrate ranges from 80 to 170°C.
  • the adhesion composition is particularly suitable for adhering a metallic substrate to a composite substrate.
  • the adhesion composition of the present invention can be used for various metallic substrates and different composite substrates known to one skilled in the art.
  • the friction material is formed by resin with a binding function, oxides with an abrasive function, sulfides and graphites with a lubricating function, metallic and organic fibers with a structural function and inert fillers.
  • the friction material is phenolic resin based.
  • the breaking force reflects the force necessary to detach the friction material from the respective metallic substrate. As an evaluation criterion, the greater the strength, the better. In the automotive segment, minimum values of around 400N/cm 2 are desirable for ambient temperature conditions and 250 N/cm 2 for evaluation carried out at a temperature of 300°C, although international standards recognize values of 250N/cm 2 for shear as acceptable. at room temperature and 200 N/cm 2 for shear at 300°C.
  • Adhesion or adhesion force directly reflects the ability to maintain adhesion of the friction material to the metal substrate after promoting shear force. As an evaluation criterion, the higher the better, indicating that the resistance of the friction material (friction) is lower than the adhesion force of the friction material to the metallic substrate. In the segment automotive, minimum values of 80% remaining adhesion of the friction material to the metallic substrate are desirable as acceptable.
  • Figure 1 shows a graph with the results of shear strength tests.
  • A) the shear strength results of the normal adhesive are shown.
  • B) the shear strength results of the modified adhesive of the invention are shown, without waiting time.
  • the “F” notation indicates cold shear strength and the “Q” notation indicates hot shear strength.
  • Figure 2 shows a graph with the results of shear strength tests using adhesives containing different concentrations of tannic acid: 5%, 7.5% and 10%. In all cases, the “F” notation indicates cold shear strength and the “Q” notation indicates hot shear strength.
  • Figure 3 shows a brake pad produced from the process of the present invention using the composition for adhesion under roller application. [0072] The results show that even at different concentrations of tannic acid the adhesive reached/provided the minimum requirements.
  • Adhesion tests were also conducted by the present inventors and the results show that the adhesion values are invariably 100% of the composite/metallic substrate contact area for the formulation defined as standard for the new adhesive, both for applications in roller like spray.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Braking Arrangements (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention relève du domaine de l'ingénierie mécanique et des matériaux. Plus spécifiquement, l'invention concerne une composition adhésive utile pour l'adhésion de métaux et de composites, ainsi qu'un procédé pour son obtention, en plus d'un élément de frottement et un procédé de formation d'un élément de frottement. La composition de l'invention comprend de l'acide tannique et une ou plusieurs résines, et engendre d'excellentes propriétés adhésives avec une résistance améliorée au cisaillement et une meilleure résistanceà la rupture. Le composite de frottement de l'invention présente une résistance élevée au cisaillement et une stabilité élevée d'adhésion. Selon un mode de réalisation, le composite de frottement de l'invention est une plaquette de frein de performance améliorée dans les conditions d'utilisation les plus variées d'un système de frein à disque.
PCT/BR2023/050209 2022-06-23 2023-06-23 Composition pour l'adhésion de métaux à des composites, procédé d'obtention de la composition, élément de frottement, procédé pour l'obtention d'un élément de frottement et système de freinage comprenant ledit élément de frottement WO2023245269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR1020220125910 2022-06-23
BR102022012591A BR102022012591A2 (pt) 2022-06-23 2022-06-23 Composição para adesão de metais e materiais compósitos, processo para sua preparação, compósito de atrito, processo de conformação de compósito de atrito

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WO2023245269A1 true WO2023245269A1 (fr) 2023-12-28

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142974A1 (fr) * 1983-11-14 1985-05-29 Minnesota Mining And Manufacturing Company Composition adhésive cyanoacrylique cntenant des tannins
JPH09278855A (ja) * 1996-04-17 1997-10-28 Nagoya Yuka Kk 硬化剤、熱硬化性樹脂組成物、硬化方法、木質材料および成形物
JP2002285125A (ja) * 2001-03-27 2002-10-03 Sumitomo Bakelite Co Ltd 無臭木質板製板用接着剤糊液の製造方法
US20070149644A1 (en) * 2004-10-15 2007-06-28 Ashland Licensing And Intellectual Property Llc Binder composition comprising condensed tannin and furfuryl alcohol and its uses
WO2017194718A1 (fr) * 2016-05-13 2017-11-16 Rockwool International A/S Procédé de liaison de surfaces d'au moins deux éléments et produit obtenu par ce procédé
WO2020008311A1 (fr) * 2018-07-02 2020-01-09 Stora Enso Oyj Procédé de préparation d'une résine de liaison
US20200362208A1 (en) * 2017-08-23 2020-11-19 Kolon Industries, Inc. Adhesive composition, adhesive comprising same, and manufacturing method therefor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142974A1 (fr) * 1983-11-14 1985-05-29 Minnesota Mining And Manufacturing Company Composition adhésive cyanoacrylique cntenant des tannins
JPH09278855A (ja) * 1996-04-17 1997-10-28 Nagoya Yuka Kk 硬化剤、熱硬化性樹脂組成物、硬化方法、木質材料および成形物
JP2002285125A (ja) * 2001-03-27 2002-10-03 Sumitomo Bakelite Co Ltd 無臭木質板製板用接着剤糊液の製造方法
US20070149644A1 (en) * 2004-10-15 2007-06-28 Ashland Licensing And Intellectual Property Llc Binder composition comprising condensed tannin and furfuryl alcohol and its uses
WO2017194718A1 (fr) * 2016-05-13 2017-11-16 Rockwool International A/S Procédé de liaison de surfaces d'au moins deux éléments et produit obtenu par ce procédé
WO2017194726A1 (fr) * 2016-05-13 2017-11-16 Rockwool International A/S Corps comprimé
US20200362208A1 (en) * 2017-08-23 2020-11-19 Kolon Industries, Inc. Adhesive composition, adhesive comprising same, and manufacturing method therefor
WO2020008311A1 (fr) * 2018-07-02 2020-01-09 Stora Enso Oyj Procédé de préparation d'une résine de liaison

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