EP0194242B1 - Method for removing paint - Google Patents
Method for removing paint Download PDFInfo
- Publication number
- EP0194242B1 EP0194242B1 EP19860850059 EP86850059A EP0194242B1 EP 0194242 B1 EP0194242 B1 EP 0194242B1 EP 19860850059 EP19860850059 EP 19860850059 EP 86850059 A EP86850059 A EP 86850059A EP 0194242 B1 EP0194242 B1 EP 0194242B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paint
- agent
- rinsing agent
- supplied
- rinsing
- 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.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
- B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
- B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
Definitions
- This invention relates to a method for removing old paint layer or layers from a surface by means of a suction nozzle which is connected by a hose to a vacuum source wherein a paint dissolving agent is supplied to the paint layer or layers and is allowed to act for a period which is sufficiently long to dissolve the paint layer or layers.
- a method of this kind is known from US-A-932 738.
- the purpose of this invention is to achieve a method for removing paint which has not the drawbacks which the known methods have.
- the purpose has been achieved by means of a method in which a paint dissolving agent is supplied on a paint layer on a surface and is allowed to act a period until the layer has been dissolved.
- the method is characterized in that a rinsing agent either being a liquid or warm air, is supplied to the dissolved paint by means of the nozzle, the mixture of paint and rinsing agent being immediately sucked away after the supply of the rinsing agent through the nozzle and through the hose into a collecting container. It has proved to be advantageous to combine the chemical treatment with a mechanical treatment of the surface since that supports the fragmentation and loosening of the paint from the surface.
- the mechanical treatment can for instance be made by scraping means, brushes or the like which are applied on the nozzle which is used for sucking up the mixture.
- Supply of the rinsing agent should, when removing certain types of paint, preferably be directed to the place of the nozzle where the paint is collected before it is sucked away.
- the choice of rinsing agent depends on the type of paint. Plastic paint usually demands chemical agents of different types and in some cases also warm air could be used whereas water can be used for alcalic paint such as oil paint. The temperature of the water should in that case be more than 40°C.
- An after treatment agent can be applied to the surface at the same time as the dissolved paint layer is sucked away. Such an after treatment agent is used to remove remainders of the paint solving agent and stabilize the surface after removing the paint so that a new paint layer, can be applied on the surface without being damaged by any remaining paint dissolving agent.
- the rinsing water is as a rule applied at a comparatively low pressure which is choosen with respect to the character of the surface i.e. so that damages do not arise on the surface and so that not to large water quantities are pressed into any opening in the surface.
- the dissolved paint is transported to a separation unit in which the paint dissolving agent together with the paint is separated from the water. Then the paint dissolving agent is separated and reactivated in an activator unit so that it can again be used for dissolving paint layers.
- This invention has the advantage that the bed, that is the surface on which the paint is supplied, is spared. Also sensitive beds as for instance bad plaster can simply be cleaned without damages. Further the method is very rapid and gives a bed which is dry, stabilized and which can immediately be used for repainting. By the invention also maximum cleanness and stability is achieved. It should be pointed out that also the outer porous structure of the surface by this method can be effectively cleaned.
- the method is very suitable for removing paint indoors. Scrawling is easily removed and also fire classified paint when repainting corridors, stair- wells and other evacuation rooms. (The fire classification presupposes a certain maximum paint layer).
- the method makes a completely controlled and environment friendly use possible. It is further possible to reuse a reactivated paint removing agent vehicle makes the method economically competitive.
- FIG 10 is a surface on which a paint layer 11 is applied.
- a paint dissolving agent is sprayed on the paint layer 11 and is allowed to act for some time.
- a nozzle 12 is moved on the surface, the nozzle being provided with a fixed or movable brush for mechanical treatment of the surface.
- the nozzle 12 is, by means of a hose 13, connected to a container 14 which in turn is connected to a vacuum source 15.
- the nozzle is also, by means of a hose 16, connected to a rinsing agent container 17 from which a rinsing agent is transported to the nozzle in the hose 16.
- the rinsing agent container can be provided with means, not shown, for heating the rinsing agent.
- the rinsing agent is water it should have a temperature which is more than 40°C and preferably is 70 - 90°C.
- the rinsing agent is mixed with the dissolved paint remainder and the paint removal agent and is sucked away in the hose 13 to the container 14 in which it is collected.
- the mixture of the paint dissolving and rinsing agent in the container 14 can then be transported to a cleaning plant 18 from which the rinsing agent is separated and leaves via an outlet 19 and as an alternative is brought back to the rinsing agent container 17.
- the paint dissolving agent and the dissolved paint might also be transported to a separation unit 20 in which the paint removing agent is separated from the paint remainders, these remainders, leaving through an outlet 21 and later being taken care of in a separate plant for destruction of waste which is dangerous for the environment.
- the paint removing agent is transported to an activator unit 22 in which the removal agent is reactivated and leaves through an outlet 23 so that it can again be used for removing paint.
- the rinsing container 17 is, via a hose, connected to a container 24 for an after treatment agent.
- This agent is supplied to the rinsing water during the last treatment of the wall in order to give the surface a pH-value which is about 7.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
- Cleaning In General (AREA)
- Road Signs Or Road Markings (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
- This invention relates to a method for removing old paint layer or layers from a surface by means of a suction nozzle which is connected by a hose to a vacuum source wherein a paint dissolving agent is supplied to the paint layer or layers and is allowed to act for a period which is sufficiently long to dissolve the paint layer or layers. A method of this kind is known from US-A-932 738.
- Removing paint has always been combined with great difficulties and in particular removing organic paints such as oilpaints, plastic paints etc. The old linseed oil paint was removed only when the total paint layer was too thick. Scraper and blowlamp were effective means, but needed hard work, and were not quite riskless. Also lye was used on certain occasions in order to dissolve the paint layer which was then rinsed with water. Establishing the plastic paints on the market meant that the difficulties to a great degree increased. Different plastics were used as binding agents and plastic paints were used for painting surfaces which were not suited for that kind of paint. A well known example is "tight" plastic paints on plaster.
- The methods which up to now have been most common are blasting, high pressure cleaning of different kinds and use of paint removing agents which are rinsed together with the paint, often by means of a liquid under high pressure. For obvious reasons no one of these methods can be used indoors without taking very extensive protective measure. When using all said methods outdoors, they have proved to cause larger or smaller damages on the surface. In particular, this is the case with plastic painted plaster.
- The three known methods leave several things to be desired with respect to the environment. Both for the person working with the method and for the environment in general terms. It is necessary to take extensive protective measure in order not to spread dust, drops of water or chemicals around the object in question.
- Further in a great part of our public environment there is a particular need for a flexible and cheap method for removing paint. The public environment is exposed to an extensive scrawling activity where spray-paint, spirit-pencils etc. are the most common tools for scrawling. Today there is no flexible and cheap paint removing method.
- In the patent literature removal of paint by a chemical - mechanical method has been described in US patent 932. 738. According to the method a paint removal agent applied on the painted surface after which a nozzle is used to remove the dissolved paint. The nozzle is, via a hose, connected to a vacuum source. In such a method no rinsing agent is positively supplied to the nozzle. The method has however not been used in practice during the long time which has elapsed since the patent was sealed. Probably this depends on that the mixture of paint and liquid which is to be transported away from the surface is very difficult to handle and not without further measures follows the air stream.
- The purpose of this invention is to achieve a method for removing paint which has not the drawbacks which the known methods have. The purpose has been achieved by means of a method in which a paint dissolving agent is supplied on a paint layer on a surface and is allowed to act a period until the layer has been dissolved. The method is characterized in that a rinsing agent either being a liquid or warm air, is supplied to the dissolved paint by means of the nozzle, the mixture of paint and rinsing agent being immediately sucked away after the supply of the rinsing agent through the nozzle and through the hose into a collecting container. It has proved to be advantageous to combine the chemical treatment with a mechanical treatment of the surface since that supports the fragmentation and loosening of the paint from the surface. The mechanical treatment can for instance be made by scraping means, brushes or the like which are applied on the nozzle which is used for sucking up the mixture. Supply of the rinsing agent should, when removing certain types of paint, preferably be directed to the place of the nozzle where the paint is collected before it is sucked away. The choice of rinsing agent depends on the type of paint. Plastic paint usually demands chemical agents of different types and in some cases also warm air could be used whereas water can be used for alcalic paint such as oil paint. The temperature of the water should in that case be more than 40°C. An after treatment agent can be applied to the surface at the same time as the dissolved paint layer is sucked away. Such an after treatment agent is used to remove remainders of the paint solving agent and stabilize the surface after removing the paint so that a new paint layer, can be applied on the surface without being damaged by any remaining paint dissolving agent.
- The rinsing water is as a rule applied at a comparatively low pressure which is choosen with respect to the character of the surface i.e. so that damages do not arise on the surface and so that not to large water quantities are pressed into any opening in the surface.
- The dissolved paint is transported to a separation unit in which the paint dissolving agent together with the paint is separated from the water. Then the paint dissolving agent is separated and reactivated in an activator unit so that it can again be used for dissolving paint layers.
- This invention has the advantage that the bed, that is the surface on which the paint is supplied, is spared. Also sensitive beds as for instance bad plaster can simply be cleaned without damages. Further the method is very rapid and gives a bed which is dry, stabilized and which can immediately be used for repainting. By the invention also maximum cleanness and stability is achieved. It should be pointed out that also the outer porous structure of the surface by this method can be effectively cleaned.
- The method is very suitable for removing paint indoors. Scrawling is easily removed and also fire classified paint when repainting corridors, stair- wells and other evacuation rooms. (The fire classification presupposes a certain maximum paint layer). The method makes a completely controlled and environment friendly use possible. It is further possible to reuse a reactivated paint removing agent vehicle makes the method economically competitive.
- The invention will be described by means of an example with reference to the accompanying figure which schematically shows a complete plan for sucking away paint, applying an after treatment agent and transportation and separation of the paint dissolved.
- In the figure 10 is a surface on which a
paint layer 11 is applied. A paint dissolving agent is sprayed on thepaint layer 11 and is allowed to act for some time. Then anozzle 12 is moved on the surface, the nozzle being provided with a fixed or movable brush for mechanical treatment of the surface. Thenozzle 12 is, by means of ahose 13, connected to acontainer 14 which in turn is connected to avacuum source 15. The nozzle is also, by means of ahose 16, connected to arinsing agent container 17 from which a rinsing agent is transported to the nozzle in thehose 16. The rinsing agent container can be provided with means, not shown, for heating the rinsing agent. If the rinsing agent is water it should have a temperature which is more than 40°C and preferably is 70 - 90°C. The rinsing agent is mixed with the dissolved paint remainder and the paint removal agent and is sucked away in thehose 13 to thecontainer 14 in which it is collected. By choosing the quantity of rinsing agent supplied with respect to the capacity of the suction nozzle it is possible to remove the paint and liquid with a minimum of spill. - The mixture of the paint dissolving and rinsing agent in the
container 14 can then be transported to acleaning plant 18 from which the rinsing agent is separated and leaves via anoutlet 19 and as an alternative is brought back to therinsing agent container 17. The paint dissolving agent and the dissolved paint might also be transported to aseparation unit 20 in which the paint removing agent is separated from the paint remainders, these remainders, leaving through anoutlet 21 and later being taken care of in a separate plant for destruction of waste which is dangerous for the environment. The paint removing agent is transported to anactivator unit 22 in which the removal agent is reactivated and leaves through an outlet 23 so that it can again be used for removing paint. - The
rinsing container 17 is, via a hose, connected to acontainer 24 for an after treatment agent. This agent is supplied to the rinsing water during the last treatment of the wall in order to give the surface a pH-value which is about 7.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8500998A SE8500998D0 (en) | 1985-03-01 | 1985-03-01 | FERGBORTTAGNINGSFORFARANDE |
SE8500998 | 1985-03-01 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0194242A2 EP0194242A2 (en) | 1986-09-10 |
EP0194242A3 EP0194242A3 (en) | 1987-06-24 |
EP0194242B1 true EP0194242B1 (en) | 1989-10-25 |
Family
ID=20359320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860850059 Expired EP0194242B1 (en) | 1985-03-01 | 1986-02-20 | Method for removing paint |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0194242B1 (en) |
JP (1) | JPS61222581A (en) |
DE (1) | DE3666546D1 (en) |
DK (1) | DK167913B1 (en) |
FI (1) | FI860861A (en) |
NO (1) | NO168932C (en) |
SE (1) | SE8500998D0 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11111372B2 (en) | 2017-10-09 | 2021-09-07 | Owens Corning Intellectual Capital, Llc | Aqueous binder compositions |
US11136451B2 (en) | 2017-10-09 | 2021-10-05 | Owens Corning Intellectual Capital, Llc | Aqueous binder compositions |
US11813833B2 (en) | 2019-12-09 | 2023-11-14 | Owens Corning Intellectual Capital, Llc | Fiberglass insulation product |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE464804B (en) * | 1987-10-07 | 1991-06-17 | Electrolux Ab | HOSE NOZZLE FOR SUCCESSFUL DISSOLUTION AND RESTRICTED SHEET REMAINS |
HUT63102A (en) * | 1990-08-11 | 1993-07-28 | Deutsche Lufthansa | Method for removing paint coatings from surfaces |
DE19539394A1 (en) * | 1994-10-13 | 1996-04-25 | Lobeck Concept Ag | Solvent mixt. for removing paint, lacquer or films |
DE19747838C2 (en) * | 1997-10-19 | 2001-07-12 | Gp Granulate Pneumatic Geraete | Method and device for the dry removal of coatings, graffiti or other surface contaminants |
GB2362314A (en) * | 2000-05-16 | 2001-11-21 | Harold Walmsley | Method and apparatus for cleaning up graffiti |
US9355100B2 (en) * | 2008-09-22 | 2016-05-31 | Qualcomm Incorporated | Methods and apparatus for reconciling versions of media context lists in communications networks |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US932738A (en) * | 1909-05-19 | 1909-08-31 | John M Wilson | Process of removing finish. |
JPS56101900A (en) * | 1980-01-16 | 1981-08-14 | Osaka Shiyariyou Kogyo Kk | Method and device for exfoliating film |
JPS57207580A (en) * | 1981-06-12 | 1982-12-20 | Tokyo Isuzu Jidosha Kk | High pressure washing car for sewer pipe which purifies and reuses water containing filth in sewer pipe |
DE3133809A1 (en) * | 1981-08-25 | 1983-03-10 | Ernest 1009 Pully Ihringer | Device for stripping paint from objects |
JPS59192654A (en) * | 1983-04-14 | 1984-11-01 | Tokyo Tatsuno Co Ltd | Car washer |
-
1985
- 1985-03-01 SE SE8500998A patent/SE8500998D0/en unknown
-
1986
- 1986-02-20 EP EP19860850059 patent/EP0194242B1/en not_active Expired
- 1986-02-20 DE DE8686850059T patent/DE3666546D1/en not_active Expired
- 1986-02-25 DK DK87786A patent/DK167913B1/en not_active IP Right Cessation
- 1986-02-25 JP JP3844886A patent/JPS61222581A/en active Pending
- 1986-02-28 FI FI860861A patent/FI860861A/en not_active Application Discontinuation
- 1986-02-28 NO NO860747A patent/NO168932C/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11111372B2 (en) | 2017-10-09 | 2021-09-07 | Owens Corning Intellectual Capital, Llc | Aqueous binder compositions |
US11136451B2 (en) | 2017-10-09 | 2021-10-05 | Owens Corning Intellectual Capital, Llc | Aqueous binder compositions |
US11813833B2 (en) | 2019-12-09 | 2023-11-14 | Owens Corning Intellectual Capital, Llc | Fiberglass insulation product |
Also Published As
Publication number | Publication date |
---|---|
DK87786A (en) | 1986-09-02 |
JPS61222581A (en) | 1986-10-03 |
FI860861A (en) | 1986-09-02 |
EP0194242A2 (en) | 1986-09-10 |
DK87786D0 (en) | 1986-02-25 |
NO168932B (en) | 1992-01-13 |
DK167913B1 (en) | 1994-01-03 |
NO860747L (en) | 1986-09-02 |
SE8500998D0 (en) | 1985-03-01 |
EP0194242A3 (en) | 1987-06-24 |
NO168932C (en) | 1992-04-22 |
DE3666546D1 (en) | 1989-11-30 |
FI860861A0 (en) | 1986-02-28 |
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