IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0598172
(2008-04-30)
|
공개번호 |
US-0326479
(2010-12-30)
|
우선권정보 |
AU-2007902248(2007-04-30) |
국제출원번호 |
PCT/IB2008/001412
(2008-04-30)
|
발명자
/ 주소 |
- Brailsford, Michael
- Dormon, Simon Mark
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
▼
A paint removal system is disclosed which comprises an environmentally safe paint stripping composition of which the primary constituent is benzyl alcohol, and which is applied to a substrate of one or more layers of paint to be removed from a surface. An impermeable biodegradable membrane is used i
A paint removal system is disclosed which comprises an environmentally safe paint stripping composition of which the primary constituent is benzyl alcohol, and which is applied to a substrate of one or more layers of paint to be removed from a surface. An impermeable biodegradable membrane is used in conjunction therewith, whereby the membrane is applied as a cover over the applied paint stripper to assist in the penetration of the paint stripping compound into the layers of paint and to assist in subsequent removal of the released paint and used stripper.
대표청구항
▼
1. A paint removal system comprising an environmentally safe paint stripping composition of which the primary constituent is benzyl alcohol, and which is applied to a substrate of one or more layers of paint to be removed from a surface and an impermeable biodegradable membrane for use in conjuncti
1. A paint removal system comprising an environmentally safe paint stripping composition of which the primary constituent is benzyl alcohol, and which is applied to a substrate of one or more layers of paint to be removed from a surface and an impermeable biodegradable membrane for use in conjunction therewith, whereby the membrane is applied as a cover over the applied paint stripper to assist in the penetration of the paint stripping compound into the layers of paint and to assist in subsequent removal of the released paint and used stripper. 2. A paint removal system according to claim 1, in which the paint stripping composition in addition to benzyl alcohol, includes water, clay, surfactant, and thickening agent. 3. A paint removal system according to claim 2, in which the paint stripping composition includes benzyl alcohol, water, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, sodium dioctyl sulfosuccinate and clay or chalk. 4. A paint removal system according to claim 2, in which the pH of the paint stripping composition is increased by the addition of sodium hydroxide, calcium hydroxide or other chemical up to a pH of 13. 5. A paint removal system according to claim 3, in which the paint stripping composition is made into a non-sagging paste. 6. A paint removal system according to claim 5, in which the paint stripping composition is formed into a paste in the following steps: a) The benzyl alcohol is first mixed with the hydroxypropyl methylcellulose to form a gel. b) The water is then premixed with sodium carboxymethylcellulose and then added to the previously thickened benzyl alcohol. c) The surfactant, dioctyl sulfosuccinate, is then added. d) After this, the clay and/or chalk is slowly added until a thick homogenous non-dropping paste is achieved. e) optionally wheat starch and/or hydroxide is added. 7. A paint removal system according to claim 5, in which the paint stripping composition is formed into a paste in the following steps: a) Water is added directly to the benzyl alcohol, or vice versa, which is then mixed with the hydroxypropyl methylcellulose to form a gel. b) Sodium carboxymethylcellulose is then added to the previously thickened gel. c) The surfactant, dioctyl sulfosuccinate, is then added. d) After this, the clay and/or chalk is slowly added until a thick homogenous non-dropping paste is achieved. e) Optionally wheat starch and/or hydroxide is added. 8. A paint removal system according to claim 3, in which the paint stripping composition has an amount of benzyl alcohol between 10% and 90%. 9. A paint removal system according to claim 3, in which the hydroxypropyl methylcellulose which is used as a thickening agent for the benzyl alcohol is Methocel 311 by Dow Chemicals and is used at between 1% & 10% of the total composition. 10. A paint removal system according to claim 3, in which the water content of the paint stripping composition is between 5% & 65%. 11. A paint removal system according to claims 10, in which the water content of the paint stripping composition is approximately 30% to 40%. 12. A paint removal system according to claim 3, in which the carboxymethylcellulose which is used as a water thickening agent, is used at between 1% and 10% of the total composition. 13. A paint removal system according to claim 3, in which the surfactant, sodium dioctyl sulfosuccinate is utilised at between 1% & 5% of the total composition. 14. A paint removal system according to claim 3, in which aluminium silicate and/or chalk is added to the composition at between 30% & 80%. 15. A paint removal system according to claim 8, in which the paint stripping formulation has an amount of benzyl alcohol equal to 20%, Methocel 311 equal to 2%, carboxymethylcellulose equal to 2%, sodium dioctyl sulfosuccinate equal to 2%, and aluminium silicate and/or chalk equal to 40%, the balance being water. 16. A paint removal system according to claim 3, in which wheat starch is added to the composition at between 3% and 30%, to help absorb any free liquid within the silicate particles. 17. A paint removal system according to claim 16, in which wheat starch is added to the composition at between 10% and 15%. 18. A paint removal system according to claim 3, in which the paint removal composition contains benzyl alcohol at between 5% and 85%, tap water at between 10% and 90%, hydroxypropyl methylcellulose at between 1% and 15%, silicates of aluminium/magnesium in the form of activated clay at between 20% and 75%. 19. A paint removal system according to claims 18, in which the paint removal composition has the addition of wheat starch at between 3% and 30%. 20. A paint removal system according to claim 3, in which the formulation of the paint stripping composition is as follows: % cumulative % benzyl alcohol 20 water 30 50 hydroxypropyl methylcellulose 2 52 carboxymethylcellulose 2 54 surfactant 2 56 activated clay 40 96 wheat starch 4 100. 21. A paint removal system according to claim 3, in which mixing of the composition is performed within a ribbon blender as follows: Methylcellulose is added to the benzyl alcohol and mixed for 30 minutes, the carboxymethylcellulose is mixed separately with the water for 15 minutes and then added to the thickened benzyl alcohol, mixing for a further 15 minutes, after which the activated clay and wheat starch (if present) is added and left to mix for one hour until a thick creamy non-dropping paste is formed. 22. A paint removal system according to claim 1, in which the cover for removing the treated paint is manufactured from biodegradable printable high-density polyethylene treated with propriety chemicals to ensure it becomes biodegradable once exposed to the environment. 23. A paint removal system according to claim 1, in which the paint stripping composition is in the form of a paste which is applied with a spatula, or where larger areas are concerned, with a trowel used for plastering, sprayed with an appropriate sprayer. 24. A paint removal system according to claim 1, in which there is provided a paint removal composition as hereinbefore described that is mixed into a thick paste with the aid of the methylcellulose and wheat flour and applied to a surface at a thickness of up to 4 mm to a surface previously paint with multi-coats of different paints and left for up to 72 hours before removal. 25. A paint removal system according to claim 24, wherein the paint stripping composition is covered with a degradable impermeable polyethylene to prevent evaporation of the active ingredients while they penetrate the various layers of paint. 26. A paint removal system according to claim 1, wherein the coating removal composition comprises constituents which are all degradable over a 14-day period. 27. A paint removal system according to claim 1, wherein the paint stripping composition is water based and comprises various constituents which are non-hazardous and does not produce toxic fumes. 28. A paint removal system according to claim 1, wherein the membrane cover is a polyethylene material and is degradable over a 15-month period depending on the type of exposure to the elements. 29. A paint removal system according to claim 3, in which an alternative thickening agent manufactured by the Hercules Company, namely Klucel PR, a hydroxypropylcellulose, is used at between 1% and 8%, instead of hydroxypropyl methylcellulose. 30. A paint removal system according to claim 29, in which the hydroxypropylcellulose is used at 5%. 31. A paint removal system according to claim 29, in which the hydroxypropylcellulose is added to the combination of benzyl alcohol and water hereinbefore disclosed, to produce a thixotropic paint like compound for the removal of varnish or thinner coats of paint, with or without the addition of clay, chalk or wheat starch. 32. A paint removal system according to claim 3, wherein Q cells glass spheres produced by the PQ Corporation is added to the paint stripping composition, at between 5% and 20%, to add to the fluidity of the paste. 33. A paint removal system according to claim 32, wherein the glass spheres are added at 6% of the composition. 34. A paint removal system according to claim 33, in which an alternative thickening agent manufactured by the Hercules Company, namely Klucel PR, a hydroxypropylcellulose, is used at between 1% and 8%, instead of hydroxypropyl methylcellulose, wherein the formula for the paint stripping composition is: % cumulative % benzyl alcohol 20 water 20 40 Klucel hydroxypropylcellulose 5 45 surfactant 2 47 Q Cell micro spheres 6 53 activated clay 40 93 wheat starch 7 100. 35. (canceled)
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