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WO2010086510A1 - Coating remover - Google Patents

Coating remover Download PDF

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Publication number
WO2010086510A1
WO2010086510A1 PCT/FI2010/050055 FI2010050055W WO2010086510A1 WO 2010086510 A1 WO2010086510 A1 WO 2010086510A1 FI 2010050055 W FI2010050055 W FI 2010050055W WO 2010086510 A1 WO2010086510 A1 WO 2010086510A1
Authority
WO
WIPO (PCT)
Prior art keywords
remover
coating
alcohol
parts
sol
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/FI2010/050055
Other languages
French (fr)
Inventor
Lauri Ylikorpi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2010086510A1 publication Critical patent/WO2010086510A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C09D9/00—Chemical paint or ink removers
    • C09D9/02—Chemical paint or ink removers with abrasives
    • 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
    • C09D9/00—Chemical paint or ink removers
    • C09D9/005—Chemical paint or ink removers containing organic solvents
    • 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
    • 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
    • C09K3/1472—Non-aqueous liquid suspensions

Definitions

  • the invention relates to a coating remover and especially to a coating remover obtained using a sol-gel process.
  • Coating different surface materials with different coatings and for different applications is generally known. Coatings are used to protect surfaces against wear or just to give surfaces a visual, attractive look.
  • a much used coating process is the sol-gel process, with which a thin coating is applied on materials.
  • the sol-gel process is often used in protecting surfaces, whereby the surface obtains wear-resistant, dirt repellent, and corrosion-protection properties. Said process can be applied on many different surface materials, such as metal, glass, stone, ceramics, plastics, wood, etc.
  • the sol-gel process has many advantages. It is easy and economic to implement, and with it, it is possible to apply efficiently thin and tight coatings even on complex shapes.
  • the sol-gel process is based on a phenomenon where solid particles in liquid phase, often in alcohol or aqueous solution are subjected to a polymerization reaction, whereby the particles form a colloid suspension, that is, sol.
  • the sol is applied on the surface to be protected.
  • the sol transforms on the surface in situ into a uniform, strong gel network structure.
  • the creation of a strong gel structure is often assisted by heat-treating the surface.
  • a sol-gel coating is typically hydrophobic and/or oleophobic, whereby further treatment of the surface, for instance by painting or spreading glue, is difficult or nearly impossible in terms of obtaining a satisfactory result.
  • a coating obtained by the sol-gel process is further treated in another manner, whereby it should be possible to reduce the hydrophobic and/or oleophobic properties of the surface or even remove the coating entirely in places where painting or renewal of the surface in other manners needs to be done. This action is essential to achieve sufficient adhesion.
  • the coating may also need to be removed entirely, because of faults or cosmetic weaknesses therein.
  • a product has now been invented that is capable of modifying the properties of a coating obtained by the sol-gel process in such a manner that the adhesion of various paints and glues, for example, to the surface is trouble- free.
  • the product it is also possible to remove the coating entirely, whereby the original untreated surface is revealed and may then be repaired, glued, painted, or altered as required in some other way.
  • An advantage of the product is that it is also non-toxic and easily preparable even in ultra-cleaned water without any special devices.
  • the prod- uct also has good storability.
  • the invention relates to a coating remover which comprises 0.5 to 50 parts by weight of an abrasive material selected from cerium oxide, diamond powder or a mixture thereof, and 99.5 to 50 parts by weight of liquid that is alcohol, water, or a mixture thereof.
  • the abrasive material is cerium oxide.
  • cerium oxide is modified to provide spherical form for the particles resulting in enhanced abrasive performance.
  • the amount of the abrasive ma- terial is 10 to 30 parts by weight. In another embodiment of the invention, the amount is approximately 2 parts by weight. Preferably, the remover contains approximately 2 parts by weight of cerium oxide.
  • the particle size of the abrasive material is significant to obtain the desired effect for the remover.
  • the particle size should be within the range of about 5 ⁇ m to about 50 ⁇ m. It has been found that particle sizes of less than 5 ⁇ m may damage the surface material. On the other hand, a remover containing particles above 50 microns did not provide the desired effect to the desired extent.
  • the mean particle size of the abrasive material is about 30 ⁇ m. In a specific embodiment, 85% of the particles have a particle size of about 30 ⁇ m, at most 10% ⁇ 30 ⁇ m, and at most. 5% >30 ⁇ m.
  • the abrasive material is mixed with a liquid that is alcohol, water, or a mixture thereof.
  • the alcohol may be methanol, ethanol, isopropanol, or bu- tanol, for instance.
  • the liquid is a mixture of water and isopropanol.
  • the ratio of wa- ter and alcohol may be adjusted according to the evaporation time of the solu- tion, and the required ratio is easy to define by a person skilled in the art.
  • the alcohol to water ratio may be 1 :4.
  • the remover of the invention may be in the form of a suspension, dispersion, or gel, whereby a suspending agent, dispersion agent, or gelling agent may be added to the liquid containing the metal oxide.
  • the remover may be applied on the surface either by hand or by machine, depending on the strength of the sol-gel coating and the quality and thickness of the coated surface; the action necessary for removing the surface may be evaluated if the composition of the surface is known. For instance, sili- con, fluoroalkyl silanes, polysiloxanes, perfluoropolyethers in various silane mixtures may be removed from ceramic materials, glass, plastic, and metal without mechanical devices by manual rubbing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Detergent Compositions (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to a coating remover that comprises 0.5 to 50 parts by weightof an abrasive material selected from ceriumoxide,diamond powderor a mixture thereof, and 99.5 to 50 parts by weightof liquid that is alcohol, wa- ter, or a mixture thereof.The remover is especially well suited for removing a sol-gel coating.

Description

Coating remover
Background of the invention
The invention relates to a coating remover and especially to a coating remover obtained using a sol-gel process.
Background of the invention
Coating different surface materials with different coatings and for different applications is generally known. Coatings are used to protect surfaces against wear or just to give surfaces a visual, attractive look. A much used coating process is the sol-gel process, with which a thin coating is applied on materials. The sol-gel process is often used in protecting surfaces, whereby the surface obtains wear-resistant, dirt repellent, and corrosion-protection properties. Said process can be applied on many different surface materials, such as metal, glass, stone, ceramics, plastics, wood, etc. The sol-gel process has many advantages. It is easy and economic to implement, and with it, it is possible to apply efficiently thin and tight coatings even on complex shapes.
The sol-gel process is based on a phenomenon where solid particles in liquid phase, often in alcohol or aqueous solution are subjected to a polymerization reaction, whereby the particles form a colloid suspension, that is, sol. The sol is applied on the surface to be protected. As the polymerization reaction continues, the sol transforms on the surface in situ into a uniform, strong gel network structure. The creation of a strong gel structure is often assisted by heat-treating the surface.
A sol-gel coating is typically hydrophobic and/or oleophobic, whereby further treatment of the surface, for instance by painting or spreading glue, is difficult or nearly impossible in terms of obtaining a satisfactory result. Thus, there are cases where a coating obtained by the sol-gel process is further treated in another manner, whereby it should be possible to reduce the hydrophobic and/or oleophobic properties of the surface or even remove the coating entirely in places where painting or renewal of the surface in other manners needs to be done. This action is essential to achieve sufficient adhesion. The coating may also need to be removed entirely, because of faults or cosmetic weaknesses therein. Brief description of the invention
A product has now been invented that is capable of modifying the properties of a coating obtained by the sol-gel process in such a manner that the adhesion of various paints and glues, for example, to the surface is trouble- free. By means of the product, it is also possible to remove the coating entirely, whereby the original untreated surface is revealed and may then be repaired, glued, painted, or altered as required in some other way.
An advantage of the product is that it is also non-toxic and easily preparable even in ultra-cleaned water without any special devices. The prod- uct also has good storability.
Detailed description of the invention
The invention relates to a coating remover which comprises 0.5 to 50 parts by weight of an abrasive material selected from cerium oxide, diamond powder or a mixture thereof, and 99.5 to 50 parts by weight of liquid that is alcohol, water, or a mixture thereof.
In an embodiment of the invention, the abrasive material is cerium oxide. In a further embodiment, cerium oxide is modified to provide spherical form for the particles resulting in enhanced abrasive performance.
In an embodiment of the invention, the amount of the abrasive ma- terial is 10 to 30 parts by weight. In another embodiment of the invention, the amount is approximately 2 parts by weight. Preferably, the remover contains approximately 2 parts by weight of cerium oxide.
The particle size of the abrasive material is significant to obtain the desired effect for the remover. The particle size should be within the range of about 5 μm to about 50 μm. It has been found that particle sizes of less than 5 μm may damage the surface material. On the other hand, a remover containing particles above 50 microns did not provide the desired effect to the desired extent. In an embodiment, the mean particle size of the abrasive material is about 30 μm. In a specific embodiment, 85% of the particles have a particle size of about 30 μm, at most 10% <30 μm, and at most. 5% >30 μm.
The abrasive material is mixed with a liquid that is alcohol, water, or a mixture thereof. The alcohol may be methanol, ethanol, isopropanol, or bu- tanol, for instance. In an embodiment of the invention, the liquid is a mixture of water and isopropanol. In the case of a water-alcohol mixture, the ratio of wa- ter and alcohol may be adjusted according to the evaporation time of the solu- tion, and the required ratio is easy to define by a person skilled in the art. The alcohol to water ratio may be 1 :4.
The remover of the invention may be in the form of a suspension, dispersion, or gel, whereby a suspending agent, dispersion agent, or gelling agent may be added to the liquid containing the metal oxide.
The remover may be applied on the surface either by hand or by machine, depending on the strength of the sol-gel coating and the quality and thickness of the coated surface; the action necessary for removing the surface may be evaluated if the composition of the surface is known. For instance, sili- con, fluoroalkyl silanes, polysiloxanes, perfluoropolyethers in various silane mixtures may be removed from ceramic materials, glass, plastic, and metal without mechanical devices by manual rubbing.
It is obvious to a person skilled in the art that as technology advances, the basic idea of the invention may be implemented in many different ways. The invention and its embodiments are thus not restricted to the examples described above, but may vary within the scope of the claims.

Claims

Claims
1. A coating remover which comprises 0.5 to 50 parts by weight of an abrasive material selected from cerium oxide, diamond powder or a mixture thereof, and 99.5 to 50 parts by weight of liquid that is alcohol, water, or a mixture thereof.
2. The coating remover as claimed in claim 1 , wherein the abrasive material is cerium oxide.
3. The remover as claimed in claim 1 or 2, wherein the amount of the abrasive material is 10 to 30 parts by weight, especially approximately 2 parts by weight.
4. The remover as claimed in any of the preceding claims, wherein the particle size of the abrasive material is about 5 μm to about 50 μm.
5. The remover as claimed in claim 4, wherein 85% of the particles have a particle size of about 30 μm, at most 10% <30 μm, and at most.
5% >30 μm.
6. The remover as claimed in any one of the preceding claims, wherein the liquid is a mixture of alcohol and water.
7. The remover as claimed in claim 6, wherein the alcohol to water ratio is 1 :4.
8. The remover as claimed in claim 6 or 7, wherein the alcohol is isopropanol.
9. A use of the remover as claimed in any one of the preceding claims for removing a sol-gel coating.
PCT/FI2010/050055 2009-02-02 2010-02-01 Coating remover Ceased WO2010086510A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20095088A FI20095088A7 (en) 2009-02-02 2009-02-02 Coating remover
FI20095088 2009-02-02

Publications (1)

Publication Number Publication Date
WO2010086510A1 true WO2010086510A1 (en) 2010-08-05

Family

ID=40404592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2010/050055 Ceased WO2010086510A1 (en) 2009-02-02 2010-02-01 Coating remover

Country Status (2)

Country Link
FI (1) FI20095088A7 (en)
WO (1) WO2010086510A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5655477A (en) * 1979-10-12 1981-05-16 Shindengen Electric Mfg Co Ltd Abrasive material for selenium photosensitive material
EP0939431A1 (en) * 1996-09-30 1999-09-01 Hitachi Chemical Co., Ltd. Cerium oxide abrasive and method of abrading substrates
WO2000037578A1 (en) * 1998-12-21 2000-06-29 Showa Denko K. K. Cerium oxide slurry for polishing, process for preparing the slurry, and process for polishing with the slurry
US6602111B1 (en) * 1999-07-16 2003-08-05 Seimi Chemical Co., Ltd. Abrasive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5655477A (en) * 1979-10-12 1981-05-16 Shindengen Electric Mfg Co Ltd Abrasive material for selenium photosensitive material
EP0939431A1 (en) * 1996-09-30 1999-09-01 Hitachi Chemical Co., Ltd. Cerium oxide abrasive and method of abrading substrates
WO2000037578A1 (en) * 1998-12-21 2000-06-29 Showa Denko K. K. Cerium oxide slurry for polishing, process for preparing the slurry, and process for polishing with the slurry
US6602111B1 (en) * 1999-07-16 2003-08-05 Seimi Chemical Co., Ltd. Abrasive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YU, T. ET AL.: "Large-Scale Synthesis of Water Dispersible Ceria Nanocrystals by a Simple Sol-Gel Process and Their Use as a Chemical Mechanical Planarization Slurry.", EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, vol. 6, 2008, pages 855 - 858 *

Also Published As

Publication number Publication date
FI20095088L (en) 2010-08-03
FI20095088A0 (en) 2009-02-02
FI20095088A7 (en) 2010-08-03

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