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Aqueous based composition containing dibasic ester and thickening agent for removing coatings

Inactive Publication Date: 2002-09-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This invention provides an aqueous-based, low-toxicity, non-flammable, thixotropic composition for rendering coatings removable from surfaces.
The composition is effective on a wide range of coatings and surfaces. The composition is useful for rendering organic polymeric coatings and finishes such as paints, varnishes, lacquers, shellacs, gums, natural and synthetic resins removable from such surfaces as wood, metal, and plastic. The composition has also been found to be effective for removing paints, inks, grease, and the like from skin. An important feature of the composition is that it provides excellent results without the need of evaporation retardants or film-forming compounds. Thus, there is no need to include in the formulation such evaporation retardants, as paraffin wax or the like, which have the disadvantage that they need to be removed in subsequent steps. Another feature of the composition is that it has a shelf life in excess of one year.

Problems solved by technology

Thus, there is no need to include in the formulation such evaporation retardants, as paraffin wax or the like, which have the disadvantage that they need to be removed in subsequent steps.

Method used

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  • Aqueous based composition containing dibasic ester and thickening agent for removing coatings

Examples

Experimental program
Comparison scheme
Effect test

example 1

The following ingredients in the amounts indicated were used to prepare a composition of this invention:

Amount (parts by Ingredient weight) Clay thickening agent (amine treated 0.8 magnesium aluminum silicate, "Veegum Pro", available from R. T. Vanderbilt Co., Inc., Norwalk, CT) Cellulose thickening agent (hydroxypropyl 1.0 methylcellulose, "Methocel K15MS", available from Dow Chemical Co., Midland, MI) Surfactant (polypropylene oxide-polyethylene 0.05 oxide copolymer, "Pluronic P104", available from BASF Wyandotte Corp. Wyandotte, MI) Dibasic ester (DBE-3, a mixture containing 89% 24.5 dimethyl adipate, 10% dimethyl glutarate, 0.5% dimethyl succinate, 0.1% methanol, available from E. I. du Pont de Nemours and Co., Wilmington, DE) Water 73.65

The clay thickening agent was added to the water and the mixture stirred at a constant rate at 78.degree. C. for 30 minutes. The cellulose thickener was then added with stirring and the resulting mixture was stirred for an additional 10 minutes....

examples 2-7

The following table sets forth ingredients and the amounts thereof used to prepare compositions within the scope of this invention. The compositions were prepared in the same manner as in Example 1, with the exception that xanthan gum was added at the same time as the cellulose thickener.

TABLE I Con- Con- Amount (parts by weight) trol trol Ingredient 2 3 4 5 6 7 A B Clay 0.27 0.25 0.25 0.25 0.25 0.20 -- -- thickening agent.sup.1 Clay -- -- -- -- -- -- 1.0 -- thickening agent.sup.2 Cellulose 0.65 0.58 0.59 0.59 0.5 0.49 1.0 -- thickening agent.sup.3 Xanthan 0.92 0.82 0.79 0.79 0.79 0.69 -- -- gum.sup.4 Dibasic 9.8 19.7 -- -- -- 4.9 -- -- ester.sup.5 Dibasic -- -- 24.6 -- -- -- -- 100 ester.sup.6 Dibasic -- -- -- 24.6 -- -- -- -- ester.sup.7 Dibasic -- -- -- -- 24.6 -- -- -- ester.sup.8 Surfactant.sup.9 0.1 0.1 0.1 0.1 0.1 0.1 0.07 -- Water 88.26 78.55 73.67 73.67 73.67 93.62 97.93 -- .sup.1 Colloidal magnesium aluminum silicate, "Veegum T", available from R. T. Vanderbilt Co., Inc. ....

examples 8-15

The following table sets forth ingredients and the amounts thereof used to prepare compositions within the scope of this invention. The compositions were prepared in the same manner as in Example 1.

TABLE III Amount (parts by weight) Ingredient 8 9 10 11 12 13 14 15 Clay 1.65 2.16 2.16 2.16 2.16 2.16 2.16 2.16 thickening agent.sup.1 Surfactant.sup.2 0.9 .144 0.9 0.9 .144 .144 .144 .144 Surfactant.sup.3 1.1 .176 1.1 1.1 .176 .176 .176 .176 Dibasic 40.3 41.0 39.32 34.3 31.0 24.00 16.12 6.12 ester.sup.4 Xanthan 0.39 0.5 0.5 0.5 0.5 0.5 0.5 0.5 gum.sup.5 Cellulose 0.70 0.9 0.9 0.9 0.9 0.9 0.9 0.9 thickening agent.sup.6 Water 55.0 55.12 55.12 60.14 65.12 72.12 80.0 90.0 .sup.1 Magnesium aluminum silicate, "Veegum D", available from R. T. Vanderbilt Co., Inc. .sup.2 Sorbitan monooleate, "Span 80", available from ICI Americas, Inc. .sup.3 Polyoxyethylene 20 sorbitan monooleate, "Tween 80", available from ICI Americas, Inc. .sup.4 DBE-3, a mixture containing 89% dimethyl adipate, 10% dimethy...

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Abstract

Composition for removing coatings from surfaces consisting essentially of at least one dibasic ester, water, and at least one thickening agent. The composition contains sufficient water and thickening agent to allow it to wet out and adhere to vertical surfaces for a sufficiently long period to insure that the dibasic ester component will have sufficient duration of contact with the coating to allow easy removal of same.

Description

DESCRIPTION OF THE PRIOR ARTThis invention relates to compositions for removing coatings from surfaces.Compositions for removing paints, varnishes, and other coatings have been available for many years. Most of these compositions fall within two general classes. The first type attacks the coating by the chemical action of the ingredients thereof, which generally comprise alkalis or acids. This type of paint remover comprises alkali and acid compositions, such as those described in U.S. Pat. Nos. 3,681,250, 3,615,825 and 3,972,839. .[.There.]. .Iadd.These .Iaddend.alkali or acid compositions require considerable after treatment to insure complete removal of the alkali or acid, and have been found to discolor wood. The second type depends upon the solvent power of the constituents of the composition to dissolve or at least soften the coatings. In the second type, it is customary to use aromatic hydrocarbons, lower aliphatic esters, ketones, alcohols, chlorinated solvents, or similar o...

Claims

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Application Information

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IPC IPC(8): C09D9/00
CPCC09D9/00
Inventor POKORNY, RICHARD J.
Owner 3M INNOVATIVE PROPERTIES CO
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