Compositions For Removing Surface Coatings

Abstract

A low VOC composition for removing coatings from a wide variety of surfaces that is biodegradable, made from renewable resources, and environmentally friendly. The composition further pertains to products which can remove a surface coating with little mechanical action.

Claims

1. A composition for removing coatings from a wide variety of surfaces that is a mixture of compounds selected from sugar derived esters, a surfactant or surfactants, a co-solvent, and optionally a scent.

2. The composition of claim 1 wherein the sugar derived ester is selected from the group consisting of methyl lactate, methyl acetate and methyl-5-methyl-2-furoate.

3. The composition of claim 1 further wherein the surfactant is selected from the group consisting of potassium oleate, polysorbate 80, and PEG 7 glyceryl cocoate.

4. The composition of claim 1 further comprising about 4% to about 10% d-Limonene by weight.

5. The composition of claim 3 comprising between about 5% to about 15% by weight of surfactant or surfactants.

6. The composition of claiml comprising between about 0% to about 15% weight of surfactant or surfactants.

7. A coating removal composition of claim 1 having at least 30% or 35%, or at least 50% of a sugar derived ester by weight, about 0% to 10% by weight of methyl-5-methyl-2-furoate (Me408), at least 4%, or at least 6%, or at least 8%, or at least 10% by weight of d-limonene, at least 5%, at least 10%, or at least 15% by weight of a surfactant or surfactants with the remainder being a solvent.

8. A coating removal composition having at least 30% or 35%, or at least 50% of a sugar derived ester by weight, 5, about 0% to 10% by weight of methyl-5-methyl-2-furoate (Me408), at least 4%, or at least 6%, or at least 8%, or at least 10% by weight of d- limonene, at least 5%, at least 10%, or at least 15% by weight of a surfactant or surfactants with the remainder being a solvent.

9. A coating removal composition having at least 30% or 35%, or at least 40% of a first sugar derived ester by weight, about 5% or about 5% or about 10% of second sugar derived ester by weight, about 0% to 10% by weight of methyl-5-methyl-2-furoate (Me408), at least 4%, or at least 6%, or at least 8%, or at least 10% by weight of d- limonene, at least 5%, at least 10%, or at least 15% by weight of a surfactant or surfactants with the remainder being a solvent.

10. The coating removal composition of claim 7 wherein application of the composition for removing polish from a nail does not smear the polish on the nail.

11. A method of removing nail polish from a surface comprising applying an effective amount of the composition of claim 7 to the surface and removing the nail polish.

12. A method of removing ink from a silk screen comprising applying an effective amount of the composition of claim 7 to the surface of the silk screen.

13. A method of removing paint from a surface comprising applying an effective amount of the composition of claim 7 to the surface of the painted material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention is drawn towards a composition for removing coatings from surfaces containing sugar derived esters. These esters can be derived fermentation of sugars or carbohydrates or by direct chemical conversion of sugars or carbohydrates, which are renewable resources. Sugar fermentation is well known, and a chemical synthesis is described in U. S. Pat. No. 9,108,940. These esters are easily biodegradable. The composition may optionally include a scent, surfactant, surfactants, or a co-solvent.

[0032] In additional embodiments a coating removal composition can be a mixture of compounds selected from methyl lactate, Me408, d-limonene, a surfactant system, an optional solvent, and optionally a scent.

[0033] In some configurations a coating removal composition can be at least 30% or at 35%, or at least 40% of first sugar derived ester by weight, about 5% or about 10% of second sugar derived ester by weight, about 0% to 10% by weight of methyl-5-methylfuroate (Me408), at least 4%, or at least 6%, or at least 8%, or at least 10% by weight of d-limonene, at least 5%, at least 10%, or at least 15% by weight of a surfactant with the remainder being a solvent.

[0034] In some configurations a coating removal composition can be a mixture of compounds selected from methyl acetate, methyl lactate, d-limonene, a surfactant, an optional solvent, and optionally a scent.

[0035] In various configurations a coating removal composition can be a composition with about 5% to about 20% by weight of water as a solvent.

[0036] All chemicals have an HLB which can be calculated. A surfactant is selected based on desired HLB of a solution. To assist in removing coatings HLBs of coating removal composition is based on HLB of coatings. A surfactant of the present configurations can be characterized in part by its Hydrophilic-Lipophilic Balance (HLB) value. A known property of surfactant systems is that they can be mixed to achieve a desired HLB. Those skilled in the art can obtain similar results by using different surfactants. In some configurations in coating removal composition containing esters and a surfactant, the surfactant can be any non-ionic surfactant with a Hydrophilic-Lipophilic Balance (HLB). In the various configurations, a surfactant can be medium (HLB about 10) to a high HLB (about 20). As used herein a medium HLB is an HLB from 3-13 and a high HLB is a HLB above 13.

[0037] Non-limiting examples of surfactants and their HLB values are given in Table A.

TABLE-US-00001 TABLE A Surfactant Synonym CAS RN HLB Polyoxyethylene Polysorbate 80 9005-65-6 10 sorbitan Tween 80 monooleate Potassium oleate Trenamine D-200 143-18-0 20 Sorbitan monooleate SPAN 80 1338-43-8 4.3 Sorbitan monostearate SPAN 60 1338-41-6 4.7 PEG-7 glyceryl Polyethylene glycol (7) 68201-46-7 10 cococate glyceryl monococoate Sodium Oleate 143-19-1 18 Sodium lauryl sulfate Sodium dodecyl sulfate 151-21-3 40 Sorbitan monolaurate SPAN 20 26266-57-9 6.7 Polyoxyethylene TWEEN 61 1338-39-2 8.6 sorbitan monostearate TRITON RW-50 Amine ethoxylate 73138-27-9 12-14

[0038] Suitable surfactants for use in formulations of the present invention include medium HLB surfactants such as polyoxyethylene sorbitan monooleate (Polysorbate 80; MilliporeSigma (Sigma-Aldrich); St. Louis, MO; HLB 10) and high surfactants such as potassium oleate (Alfa Chemistry, Holtsville, NY; HLB 20).

FORMULATION EXAMPLES

[0039] The following Examples illustrate certain aspects and advantages of the present invention, which should be understood not to be limited thereby.

[0040] The following tables detail examples of various formulations. The raw materials were weighed out on an analytical balance and added to a round bottom flask with a stir bar for mixing. Ingredients are listed in the order as added and mixed until the solution was uniform, and all materials were dissolved. The solution was mixed for about 30 minutes. All weights given are in grams.

TABLE-US-00002 TABLE 1 Example Example Example Example Example Example 1 2 3 4 5 6 Potassium 4.0 4.0 2.0 4.0 4.0 Oleate Polysorbate 6.0 6.0 6.0 6.0 6.0 80 d-Limonene 10.1 5.0 2.5 10.1 10.1 2.01 Isopropyl 14.2 14.2 14.2 2.0 2.0 Alcohol Methyl 13.1 13.1 13.1 13.1 13.1 18.0 Lactate Methyl 5.1 9.6 12.2 12.2 Acetate Water 8.0 8.0 8.0 8.0 8.0

TABLE-US-00003 TABLE 2 Example 9 Example 10 Example 11 Example 12 Example Example D1 Low D2 Low D3 Low D4 Low 7 8 VOC VOC VOC VOC Potassium 2.0 2.0 4.0 4.0 4.0 4.0 Oleate Polysorbate 80 6.0 6.0 10.0 6.0 PEG 7 glyceryl 2.0 2.0 cocoate d-Limonene 2.0 2.0 5.1 5.1 5.1 5.1 Acetone 7.1 15.0 Methyl Lactate 18.0 9.0 5.1 5.1 5.1 5.1 Water 8.0 8.0 Methyl Acetate 9.0 20.2 27.3 31.3 20.2 VOC 17.08% 20.46% 10.45% 15.47%

TABLE-US-00004 TABLE 3 Example 13 Example 14 D5 Low VOC D6 Low VOC Example 15 Example 16 Example 17 Potassium Oleate 4.0 4.0 4.0 4.0 4.0 Polysorbate 80 10.0 10.1 6.0 6.0 6.0 d-Limonene 10.1 5.1 5.1 3.0 Isopropyl Alcohol 7.1 7.1 7.1 Methyl Lactate 5.1 31.4 13.1 5.0 13.1 Water 8.0 8.0 8.0 Methyl Acetate 26.3 12.2 20.3 12.2 Methyl 5-Methyl-2- 2.1 Furoate VOC 21.72% 17.83%

TABLE-US-00005 TABLE 4 Example 18 Low VOC Example 19 Potassium Oleate 4.0 Polysorbate 80 6.0 d-Limonene 3.0 2.5 Isopropyl Alcohol 7.1 Methyl Lactate 5.0 17.5 Water 8.0 Methyl Acetate 20.3 27.5 Methyl 5-Methyl-2- 2.3 2.5 Furoate VOC

Methods for Removing Coatings on Various Materials

[0041] A. Stainless Steel Metal Plates.

[0042] Rustoleum Black Semi Gloss protective enamel spray paint, Rustoleum Red Gloss protective Enamel Spray paint, Perfomix Plastic Dip Rubber paint, and Valspar Interior/Exterior re spray paint for plastic were all applied to multiple clean stainless steel sheets (approximately 46 inches). The coating on each of the sheets was allowed to dry for a minimum of 24 hours. For one test the formulation in Example 9 (low VOC) and a second formulation with methyl 5-methyl-2-furoate in Example 18 were applied to the plates. Within approximately 5 to 8 minutes the paints on the various metal sheets bubbled up and the sheet could be wiped clean with a paper towel.

[0043] A nitrocellulose-based nail polish that was developed as a safer nail polish was painted on the metal sheets using 3 coats of the polish. Ten minutes was allowed between the painting of each coat. After the addition of the 3 coats the nail polish was cured for 24 hours. Multiple colors were tested: White, Brown, Black, Yellow, Orange, Blue, Red, Burgundy, and Pink. All 19 formulations were used to remove the nail polish by treating a cotton ball and wiping. All colors were removed with no smearing as is typical for nail polish removal. The same testing was performed on finger nails using the red polish. The formulations removed the nail polish without smearing or drying the nail as occurs with present commercial nail polish removers.

[0044] The following commercial nail polishes were tested as above using the 19 examples of formulations given in the preceding tables:

[0045] 1. Sally Hansen Instant Dri Re-Teal

[0046] 2. RGB Nail Polish Orange

[0047] 3. Sally Hansen Hard as Nails Blue Boom Glitter

[0048] 4. Mineral Fusion Crimson Rouge

[0049] 5. OPI Nail Lacquer Red

[0050] 6. Sally Hansen Hard as Nails Glitter Rock Star Pink

[0051] 7. Gabriel Nail Polish Red

[0052] 8. OPI Base/Gel Coat Chick Flick Cherry

[0053] 9. Sally Hansen Insta Dri Flashy Fuchsia

[0054] 10. Sally Hansen Insta Dri Cherry Fast.

[0055] Roof tar and super glue were applied to separate metal sheets and each was allowed to dry for 24 hours. Example 9 with low VOC was used to wipe the roof tar metal sheet and the super glue metal sheet. In both cases the stainless steel sheet was wiped clean.

[0056] An epoxy-nylon based coating was applied to metal sheets and allowed to dry for 24 hours. Example 9 (4.0 grams of potassium oleate, 6.0 grams of polysorbate 80 grams, 5.1 grams of D-Limonene, 7.1 grams of acetone, 5.1 grams of methyl lactate, 8 grams of water and 20.2 grams of methyl acetate with a measured VOC of 17.08%)

[0057] An epoxy-nylon based coating was applied to the stainless steel metal sheets and allowed to cure for 24 hours. Example 9 was applied to the treated sheet and allowed to penetrate the material for 10 minutes. After the 10 minutes the coating could be pulled off completely from the sheet.

[0058] B. Brick

[0059] Rustoleum Black Semi Gloss protective enamel spray paint, Rustoleum Red Gloss protective Enamel Spray paint, and Valspar Satin Interior pain Pink were applied separately to bricks. The paint was allowed to dry for 24 hours. Example 9 was applied to the coating on the bricks and sat for 10 minutes prior to removal. The 3 paint types were easily wiped off with a paper towel leaving no residual paint.

[0060] C. Iron Pipe

[0061] A piece of iron pipe was painted with Sally Hansen Miracle Gel Red nail polish on side and the other side was coated with a black Sharpie. The coatings were dried for 24 hours. Example 9 and Example 18 (4.0 grams of potassium oleate, 6.0 grams of Polysorbate 80, 3.0 grams of D-Limonene, 7.1 grams of Isopropyl Alcohol, 5.0 grams of methyl lactate, 8.0 grams of water, 20.3 grams of methyl acetate and 2.3 grams of Methyl 5-Methyl-2- Furoate) were used to remove the polish. Neither acetone nor the example formulations removed the black Sharpie.

[0062] D. Plastics

[0063] A PVC pipe, CPVC pipe and a PETE plastic bottle were painted with Sally Hansen Miracle Gel Red nail polish on one side with the other side was coated with a black Sharpie. After 24 hours of drying, Examples 9 and 18 were used to remove the nail polish. Neither acetone nor the example formulations removed the black Sharpie.

[0064] E. Silk Screen

[0065] A silk screen was coated with ink. Example 18 was utilized, and it removed entirely the ink and left the screens in a condition where no further cleaning was necessary.

[0066] Unexpectedly it was found that the various composition examples could be used to remove various coatings from a multitude of surfaces, both porous and nonporous.

[0067] While this invention has been described with respect to various specific examples and embodiments, it is to be understood that the invention is not limited thereto and that it can be variously practiced with the scope of the following claims. As used herein, the terms comprises, comprising, includes, including. has, having, or any other variation thereof, are intended to cover a non-exclusive inclusion.