WO2016200941A1 - Composition de rodage pour substrats - Google Patents

Composition de rodage pour substrats Download PDF

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Publication number
WO2016200941A1
WO2016200941A1 PCT/US2016/036449 US2016036449W WO2016200941A1 WO 2016200941 A1 WO2016200941 A1 WO 2016200941A1 US 2016036449 W US2016036449 W US 2016036449W WO 2016200941 A1 WO2016200941 A1 WO 2016200941A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
composition according
lapping
present
abrasive
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.)
Ceased
Application number
PCT/US2016/036449
Other languages
English (en)
Inventor
José M. BARBA
Gabriel PRADO
Francisco T. Ramal, Jr.
Cesar H. PAVAM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Publication of WO2016200941A1 publication Critical patent/WO2016200941A1/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
    • C09G—POLISHING COMPOSITIONS; SKI WAXES
    • C09G1/00—Polishing compositions
    • C09G1/02—Polishing compositions containing abrasives or grinding agents
    • 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
    • C09K3/1454—Abrasive powders, suspensions and pastes for polishing
    • C09K3/1463—Aqueous liquid suspensions

Definitions

  • the present invention refers to a lapping composition designed for conditioning surfaces such as gears, seals, rings, and others.
  • the composition is an emulsion of water in oil wherein the improvement has been achieved when using a synergistic combination of additives, such as wetting agents, dispersants, surface tension modifiers and surface modifiers.
  • Lapping is an operation that uses low speed and low pressure in the finishing of metal parts, so as to correct minor imperfections on metal surfaces, typically by rubbing an abrasive composition against the substrate material in order to help condition the substrate surface.
  • Abrasive lapping processes in which the particulate abrasive is placed on the surface of a fabric are widely practiced.
  • the particulate abrasive material is placed in a fluid carrier which suspends and transports the abrasive and lubricates the interface between the metallic shield and the workpiece to be conditioned so as to minimize metal to metal contact.
  • a mixture comprised of the carrier and the particulate abrasive is continuously fed to the surface of the metal shield and a uniform dispersion of the solid particles in the liquid carrier is desirable to achieve a controlled and uniform feeding to the interface between the metallic shield and the component being lapidated.
  • the container containing the carrier and abrasive particle mixture is usually mixed with a stirrer so as to prevent solid particles from precipitating to the bottom of the reservoir.
  • Document US 4.046.524 presents a lapping composition for use in polishing surfaces, such as gears, seals, rings and others, comprised of a hydrocarbon liquid that is gelled by adding a gelling agent, which is an alkyl-orthophosphate, to which a sandy abrasive is added.
  • a gelling agent which is an alkyl-orthophosphate
  • the present invention comprises a synergistic combination of additives, such as water, at least one organic solvent, at least one mineral oil and at least 1.8% by weight, based on the total mass of the composition, of a silicone polyether based stabilizer.
  • additives include wetting agents, dispersants, surface tension modifiers and surface modifiers.
  • the present invention relates to the composition of a lapping composition capable of keeping the abrasive particles in suspension at the working viscosity for extended periods of time without external agitation.
  • the present composition comprises a synergistic combination of additives, such as at least one organic solvent, at least one mineral oil and at least 1.8% by weight, based on the total weight of the composition, of a silicone polyether based stabilizer.
  • Optional additives include wetting agents, dispersants, surface tension modifiers and surface modifiers.
  • the present inventors have developed a composition surprisingly capable of maintaining stability for at least 10 days at room temperature.
  • the composition of the lapping composition in the present invention comprises at least 1.8% by weight, based on the total weight of the composition of a silicone polyether based stabilizer.
  • the silicone polyether is selected from the family of trisiloxanes.
  • silicone polyether examples include XIAMETER® OFX-5211 from Dow Corning, Hortolandia, Brazil.
  • the unexpected results obtained with this composition are partly produced by silicone polyether.
  • the inventors of the present composition postulate that the silicone polyether produces a "super-spreading" of the generally hydrophobic abrasive particles present in the composition.
  • the silicone polyether present in the composition promotes super-spreading of the mineral oil over the surface of the particles in suspension (especially silicon carbide, which is non-polar), resulting in a greater packing of these particles and thus a larger packing volume fraction.
  • the composition flows with greater difficulty at steady state, resulting in high "yield stress” and greater stability to sedimentation.
  • the present composition optionally comprises at least one organic solvent to facilitate ring cleaning after using the present composition in the lapping process.
  • organic solvents include, but are not limited to, isoparaffin, dodecane, thinners, degreasers, etc.
  • the present composition further comprises a mineral oil that serves as lubricant and vehicle for mineral suspension.
  • mineral oils that can be used in the present composition include, but are not limited to, USP 70 white mineral oil, paraffin oil, USP 90 mineral oil etc.
  • Lapping compositions generally comprise an abrasive mineral.
  • Any abrasive mineral may be used in the composition of the composition subject of the patent application, such as alumina, silicon carbide, chromium oxide, calcined bauxite, magnesium silicate, and iron oxide, among others.
  • the abrasive mineral is selected from the group consisting of aluminum oxide and silicon carbide.
  • Commercially available examples of abrasive minerals include TAP-8 and EC6R 600F, both by Imerys (Salto, Brazil).
  • composition of the present invention optionally comprises a colloidal silica based thickener to adjust the viscosity to a range suitable for working.
  • colloidal silica based thickener examples include products from the Aerosil family by Evonik (Americana, Brazil) and Cab-o-Sil by Cabot (Boston, USA).
  • the present invention comprises a second aqueous stabilizer based on fatty alcohol ethoxylate and a fatty acid.
  • a second aqueous stabilizer based on fatty alcohol ethoxylate and a fatty acid.
  • Such stabilizers aid in the dispersion of other minerals optionally present in the composition, and that may not interact with the silicone polyether, such as alumina, for example.
  • commercially available examples of the second stabilizer include Tergitol 15-S-7 by Dow Chemicals (Jundiai, Brazil) and Quimipel Coat 9330 by Quimipel Indiistria Quimica (Piracaia, Brazil).
  • the second stabilizer being a bidentate chelating agent, is useful in the stabilization of the functional groups on the surface of the alumina, as shown in the figure below.
  • compositions Prior state of the art compositions aimed at increasing the stability of the composition by adding thickeners. However, this practice results in an increase in viscosity that makes it difficult to apply the composition using a pumping system.
  • the inventors of the present invention have developed a composition whose viscosity remains equal to or lower than 2500 cP at a temperature of 25°C. This specified viscosity range is important, not only for maintaining the minerals in suspension, but also to facilitate the application of the liquid through the pumping system.
  • the composition of the present invention has between 50% and 100% stabilization of solid particles in suspension, and such stabilization of between 50% and 100%) is maintained without external agitation or shearing for up to 10 days.
  • the silicone polyether acts by stabilizing the non-polar mineral oil (silicon carbide)
  • the other stabilizers may act on the other components of the composition, for example, a polar mineral (alumina), resulting in a mixture synergistically stable, even at low viscosities.
  • the metal part polished with the present composition may be quite easily cleaned with either organic solvents or with water. This is possible because in addition to being a mineral suspension in mineral oil, the composition is also a water in oil emulsion. The water in question comes from the fatty acid used;
  • composition provides kinetic stability of the highly improved suspension for the abrasive particles
  • composition provides highly desirable flow characteristics, not only under shear, but also in a static system, resulting in unexpected improvements in the lapping rate.
  • Density the density of each polishing composition prepared as described below was measured using a 25 mL polished stainless steel pycnometer with lid, following the procedure described in technical standard ASTM D1475 - 13, "Standard Test Method for Density of Liquid Coatings, Inks, and Related Products".
  • Total Solids total solids was determined for each lapping composition using a total solids analyzer supplied by MARTE (Sao Paulo, SP, Brazil), based on the mass loss after gradually heating the sample under infrared radiation, to a constant mass (heating ramp from 30 to 250°C in 15 min). The mass of the lapping composition samples was determined before the test and after heating the samples. The mass loss was then calculated as the total percentage of lost mass.
  • the lapping composition of Comparative Examples A-H and Examples 1-7 were prepared using the following experimental procedure: the materials listed in Table 1 were added to a clean, dry flask in the order presented. The mixture was homogenized using a Cowles mechanical stirrer (Siemens Model ML- 10, supplied by Tedemix, Sao Paulo, SP) at room temperature until the formation of a vortex in the center of the mixture and for at least 10 min. The amount of each ingredient is expressed in Table 1 as percent by weight (% w), based on the total percentage of the composition (100%). Table 1
  • the desired amount of fatty acid emulsion was added slowly under mechanical agitation, as shown in Table 2. After completing the addition, the mixture was stirred again for at least 30 min at room temperature.
  • the desired amount of aluminum oxide (alumina) was slowly added to the mixture using mechanical agitation, followed by the silicon carbide, as shown in Table 2. After the addition was complete, the composition was kept under agitation for at least 30 min. at room temperature, to ensure adequate dispersion of the minerals.
  • the viscosity of the composition was measured with a Brookfield viscometer (DV-II + Pro model) using number 03 spindle and a 30 rpm stirrer speed. The final viscosity of each composition is shown in Table 3.
  • Yield Stress measurements, obtained using an RH-3 Discovery TA Instruments (New Castle, DE, USA) rheometer, and calculated according to the Waal model, represents the minimum pressure on the liquid so that it flows. Therefore, the lower the yield stress value, the greater the tendency of liquid to flow or, in other words, decant. Therefore, the lower the "yield stress” the more unstable the colloidal dispersion will be.
  • the stability of each composition was determined based on the Yield Stress values and visual observation of each sample. Samples decanting in less than 10 days were classified as "sedimented”. The lapping compositions of the present invention had their stabilities classified as “stable” in the examples in which no decantation was observed within up to 10 days.
  • Comparative lapping compositions were prepared following the procedure described above for Comparative Examples A-H and Examples 1-7 but using a different stabilizing system.
  • a mixture of EO-PO block copolymer Teetronic 1107 nonionic surfactant, BASF, Sao Paulo
  • polyisobutylene PIB-32, Braskem Camacari
  • the amount of each ingredient is expressed in Table 4 as percent by weight (% w), based on the total percentage of the composition (100%).
  • each composition was determined based on visual observation of each sample. Samples where decantation was observed in less than 12 hours had their stability classified as "very poor” or “poor” (decantation in less than 24 hours). The lapping compositions of the present invention had their stabilities classified as "good” (no decantation observed after 72 hours) or "excellent” (no decantation observed after 120 hours).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

La présente invention concerne une composition de polissage conçue pour conditionner des surfaces, telles que des engrenages, des joints, des bagues, et autres. La composition est une émulsion huile dans l'eau, l'amélioration étant obtenue par utilisation d'une combinaison synergique d'additifs, tels que des agents de mouillage, des dispersants, des modificateurs de tensioactivité et des modificateurs de surface.
PCT/US2016/036449 2015-06-08 2016-06-08 Composition de rodage pour substrats Ceased WO2016200941A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102015013230-1A BR102015013230A2 (pt) 2015-06-08 2015-06-08 Composition of substrate lapidation
BR1020150132301 2015-06-08

Publications (1)

Publication Number Publication Date
WO2016200941A1 true WO2016200941A1 (fr) 2016-12-15

Family

ID=57504636

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/036449 Ceased WO2016200941A1 (fr) 2015-06-08 2016-06-08 Composition de rodage pour substrats

Country Status (2)

Country Link
BR (1) BR102015013230A2 (fr)
WO (1) WO2016200941A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10344169B2 (en) 2014-09-30 2019-07-09 3M Innovative Properties Company Free-radical polymerization methods and articles thereby

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017765A1 (fr) * 1996-10-23 1998-04-30 Agency Design Services Limited Composition, procede de traitement d'une surface non poreuse et surface non poreuse ainsi traitee
US6090765A (en) * 1997-12-12 2000-07-18 Church & Dwight Co., Inc. Composition for cleaning hard surfaces
US20070275867A1 (en) * 2004-05-05 2007-11-29 Serobian Ashot K Water-Based Silicone Dispersion Containing Low Level of Silicone Oils
US20080171683A1 (en) * 2007-01-11 2008-07-17 Johnson Andress K Premoistened cleaning disposable substrate for leather and method of preserving a leather surface by contacting said surface with said substrate
US20090035451A1 (en) * 2007-08-03 2009-02-05 Ashot Serobian Sprayable Dry Wash and Wax Composition and Method of Using Same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017765A1 (fr) * 1996-10-23 1998-04-30 Agency Design Services Limited Composition, procede de traitement d'une surface non poreuse et surface non poreuse ainsi traitee
US6090765A (en) * 1997-12-12 2000-07-18 Church & Dwight Co., Inc. Composition for cleaning hard surfaces
US20070275867A1 (en) * 2004-05-05 2007-11-29 Serobian Ashot K Water-Based Silicone Dispersion Containing Low Level of Silicone Oils
US20080171683A1 (en) * 2007-01-11 2008-07-17 Johnson Andress K Premoistened cleaning disposable substrate for leather and method of preserving a leather surface by contacting said surface with said substrate
US20090035451A1 (en) * 2007-08-03 2009-02-05 Ashot Serobian Sprayable Dry Wash and Wax Composition and Method of Using Same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10344169B2 (en) 2014-09-30 2019-07-09 3M Innovative Properties Company Free-radical polymerization methods and articles thereby

Also Published As

Publication number Publication date
BR102015013230A2 (pt) 2017-10-31

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