WO2002002699A1 - Procede permettant d'enlever la peinture, faisant appel a un film barriere - Google Patents

Procede permettant d'enlever la peinture, faisant appel a un film barriere Download PDF

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Publication number
WO2002002699A1
WO2002002699A1 PCT/CA2001/000977 CA0100977W WO0202699A1 WO 2002002699 A1 WO2002002699 A1 WO 2002002699A1 CA 0100977 W CA0100977 W CA 0100977W WO 0202699 A1 WO0202699 A1 WO 0202699A1
Authority
WO
WIPO (PCT)
Prior art keywords
paint
barrier film
film
stripper
onto
Prior art date
Application number
PCT/CA2001/000977
Other languages
English (en)
Inventor
Daniel Pageau
Elizabeth Marcu
Original Assignee
E.Qu.I.P. International Inc.
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 E.Qu.I.P. International Inc. filed Critical E.Qu.I.P. International Inc.
Priority to AU2001272247A priority Critical patent/AU2001272247A1/en
Publication of WO2002002699A1 publication Critical patent/WO2002002699A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0014—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by incorporation in a layer which is removed with the contaminants

Definitions

  • the present invention relates to a method for facilitating removal of a film of chemically resistant paint by application thereto of a paint stripping agent.
  • the invention relates to a method where a barrier film is used to ensure intimate contact between the paint film and paint stripping agent.
  • Chemically resistant paints such as epoxy, urethanes and others, commonly used on aeroplanes, trains or other types of equipment are very difficult to remove using chemical stripping agents. As a matter of fact, to strip these types of paint off, there are only limited options.
  • a first option consists of sandblasting the paint to be stripped off with agents such as starch, dry ice or others which will not damage the underlying substrate. This technique is efficient but it results in the production of large amounts of contaminated and/or dangerous sandblasting by-products that are difficult to dispose of, and cannot be used for any other purpose.
  • a second option consists of using methylene chloride based paint strippers (or those containing CFCs or phenol) because they are very effective. Notwithstanding this effectiveness, the use of methylene chloride has two major drawbacks. Firstly, methylene chloride is not environmentally friendly as it adversely affects the ozone layer and its use is being restricted. Secondly, it cannot effectively remove some paints.
  • a third option consist of using the GREENSOLVTM products forming the subject matter of US patent Nos. 5,932,530 and 5,952,277 both assigned to the Applicant.
  • These synergistic paint strippers are more environmentally friendly that the methylene chloride based paint strippers, but they are not as effective as desired for removing some high durability paints that are used on some equipments such as airplanes.
  • the main object of the invention is to provide a method for efficiently removing a layer(s) of paint from a surface, which comprises the steps of: • applying a paint stripper such as a GREENSOLVTM product, onto the film of paint to be removed; covering the film of paint and the paint stripper applied thereto with an impermeable or semi-permeable barrier film such as an aluminium foil; allowing the paint stripper to act onto the paint at room temperature for a given period of time of typically 2 hours; and removing the barrier film and cleaning the surface by wiping it and/or washing it with water to remove any paint which has not come off attached to the barrier film.
  • a paint stripper such as a GREENSOLVTM product
  • the method according to the invention makes use of an impermeable or semi-permeable barrier film to ensure intimate contact between the paint stripping agent and the paint film.
  • the barrier film can be composed of metal (such as aluminium), plastic (such as polyethylene or any other type of plastic material not affected by the solvent system used in the stripping agent), paper (including coated papers) or any other materials. It may also consist of a wax film included in the stripping agent or applied over it.
  • the barrier film may be disposed off, recycled of reused. After such a renewal, the surface can be cleaned by wiping and/or washing with water. The chemicals will degrade in less than 16 days and the solids left in water may easily be removed by filtration. After regular treatment, the water used for the washing can be disposed off in a municipal sewer.
  • the method according to the invention is particularly effective against chemically resistant paints, such as epoxy and polyurethanes. However, it can also be used on other types of paints with equal effect.
  • Chemically resistant paints are typically used on equipments such as aeroplanes, boats, trains, cars and other types of equipment. As aforesaid, it has been necessary so far to strip paint using mechanical methods such as blasting with abrasives or non-abrasive materials.
  • mechanical methods such as blasting with abrasives or non-abrasive materials.
  • barrier film improves efficiency of paint removal and, in many cases, it makes it feasible to use chemical stripping method, instead of blasting. 2.
  • the use of a barrier film minimizes the loss of volatile solvents, which lowers VOC emissions and, as a secondary benefit, it ensures that the solvents remain in contact with the paint film, where they can act on it.
  • barrier film reduces the loss of paint stripper by mechanical means, i.e. it is less likely to drip off of the painted surface, being retained by the barrier film.
  • barrier film also ensures better, i.e. more intimate, contact between the chemical stripping agent(s) and the paint film. This further improves the stripping action. 5.
  • the use of a barrier film prevents air contact with the stripping composition. In the case of strippers using some classes of gelling agents, exposures to humidity in the air can result destabilization of the gel/solvent matrix, which lowers the efficiency of the stripping agents. By excluding contact with air, the effectiveness of the stripper in increased. 6.
  • the use of an impenetrable barrier film also serves to reduce or eliminate the potential of oxygen to come into contact with the cleaning mixture. Such enhances its cleaning efficiency.
  • the paint film will adhere to the barrier film.
  • the use of a barrier film will facilitate removal of the paint when the barrier film is peeled off.

Landscapes

  • Paints Or Removers (AREA)

Abstract

L'invention concerne un procédé permettant d'enlever efficacement une couche de peinture d'une surface. Ce procédé consiste à appliquer un produit décapant sur la couche de peinture à enlever, à recouvrir la couche de peinture et le produit décapant appliqué sur cette dernière d'un film barrière imperméable ou semi-perméable, à laisser agir le décapant sur la peinture à température ambiante, pendant un certain temps, et à enlever le film barrière et à nettoyer la surface en la frottant et/ou en la lavant avec de l'eau pour enlever tout reste de peinture qui n'a pas été retiré, accroché au film barrière.
PCT/CA2001/000977 2000-07-04 2001-07-03 Procede permettant d'enlever la peinture, faisant appel a un film barriere WO2002002699A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001272247A AU2001272247A1 (en) 2000-07-04 2001-07-03 Method for removing paint using a barrier film

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA 2313375 CA2313375A1 (fr) 2000-07-04 2000-07-04 Methode pour enlever la peinture a l'aide d'un film barriere
CA2,313,375 2000-07-04

Publications (1)

Publication Number Publication Date
WO2002002699A1 true WO2002002699A1 (fr) 2002-01-10

Family

ID=4166648

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/000977 WO2002002699A1 (fr) 2000-07-04 2001-07-03 Procede permettant d'enlever la peinture, faisant appel a un film barriere

Country Status (3)

Country Link
AU (1) AU2001272247A1 (fr)
CA (1) CA2313375A1 (fr)
WO (1) WO2002002699A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6923873B2 (en) * 2001-01-19 2005-08-02 Greensolv Environmental Products Inc. Paint stripping composition and method of using the same
WO2013032862A1 (fr) * 2011-08-26 2013-03-07 Johnson Jesse D Appareil et procédé pour enlever des marquages peints
US8419863B2 (en) 2011-08-26 2013-04-16 Jesse Duane Johnson Method for removing painted markings
CN115515727A (zh) * 2020-03-30 2022-12-23 汉莎技术股份公司 从表面去除覆盖层的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705857A (en) * 1971-01-25 1972-12-12 Olin Corp Composition and method for stripping polyvinyl butyral primed coatings
WO1991000893A2 (fr) * 1989-06-30 1991-01-24 Stevens Sciences Corp. Composition decapante pour peintures et vernis, et procedes associes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705857A (en) * 1971-01-25 1972-12-12 Olin Corp Composition and method for stripping polyvinyl butyral primed coatings
WO1991000893A2 (fr) * 1989-06-30 1991-01-24 Stevens Sciences Corp. Composition decapante pour peintures et vernis, et procedes associes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6923873B2 (en) * 2001-01-19 2005-08-02 Greensolv Environmental Products Inc. Paint stripping composition and method of using the same
WO2013032862A1 (fr) * 2011-08-26 2013-03-07 Johnson Jesse D Appareil et procédé pour enlever des marquages peints
US8419863B2 (en) 2011-08-26 2013-04-16 Jesse Duane Johnson Method for removing painted markings
US9102837B2 (en) 2011-08-26 2015-08-11 Jesse Duane Johnson Apparatus and method for removing painted markings
CN115515727A (zh) * 2020-03-30 2022-12-23 汉莎技术股份公司 从表面去除覆盖层的方法

Also Published As

Publication number Publication date
CA2313375A1 (fr) 2002-01-04
AU2001272247A1 (en) 2002-01-14

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