Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-02-18
1999-09-14
Skane, Christine
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510202, 510213, 510500, C09D 900, C11D 750
Patent
active
059522771
DESCRIPTION:
BRIEF SUMMARY
The present invention broadly relates to new compositions usually referred to as "paint removers" in the trade, which are used for removing paint from a substrate, such as wood, metals, like iron or steel, or plastic material like polypropylene.
More particularly, the invention relates to a new paint removing composition comprising a plurality of known solvents and paint removers which are mixed in suitable amounts, and altogether "cooperate" in a synergistic manner to give very efficient results for removing paint from a substrate. This composition is particularly efficient with respect to paints comprising as monomer or comonomer at least one monomer selected from the group consiting of urethane, melamine and epoxy monomers, and with respect to paints defining a powder coating (especially a powder coating of polyester isocyanate.
As aforesaid, numerous products are known and presently available in the market as solvents and/or paint removers. However, most of these known products are restricted to very specific uses (some are efficient with given types of paint while others are efficient with other types of paint). Most of the known products also are either hydrophobic or hydrophillic, thereby further restricting their uses.
Furthermore, the Applicant has disclosed in his co-pending Canadian patent application serial no. 2,121,017 of Apr. 11, 1994 a paint removing composition comprising a plurality of known solvents and paint removers which are mixed in suitable amounts, and altogether "cooperate" in a synergistic manner to give very efficient results for removing paint from a substrate.
The object of the present invention is to provide a synergistic paint removing composition which incorporates a plurality of known solvents and/or paint removers together with one or more suitable wetting agents, and which is surprisingly still more efficient than the paint removing composition making the object of the Applicant's co-pending Canadian patent application serial no. 2,121,017, especially with respect to urethane based paints, melamine based paints, epoxy based paints and powder coating paints.
The invention is based on the discovery that if some very specific solvents and paint removers known per se are mixed in very specific amounts, the resulting composition exhibits an excellent paint removing action which is actually better than the paint removing action of each solvent or paint remover when taken separately or the paint removing composition of the Applicant's co-pending Canadian patent application serial no. 2,121,017, whatever be the type of paint to be removed or the substrate onto which this paint has been applied. The invention is also based on the discovery that when the same, very specific solvents and paint removers are mixed in said very specific amounts, the resulting composition is partially miscible in water even though some of its constituents are not water miscible, thereby making the composition easy to wash and thus preventing oily film to be left on the treated substrate.
The synergistic paint removing composition according to the invention basically comprises: consisting of terpene derivatives, oleoresins and mixtures thereof; and from the group consisting of C.sub.12 -C.sub.15 alcohols, ethoxylated C.sub.12 -C.sub.15 -alcohols and their mixtures, and of 0.5 to 2% of an ethoxylated nonylphenol derivative of the formula:
In the above formulation as well as everywhere else in the following description and accompanying claims, the percentage is expressed by weight unless otherwise specified.
Preferably, the water immiscible compound is selected from the group consisting of d-limonene, dipentene, terpinolene, terpene alcohols, pine oil, turpentine oil and their mixtures. The preferred compounds are d-limonene, terpene alcohols and pine oil, the most preferred one being d-limonene.
The composition according to the invention is normally in a liquid form. If desired, for some applications, a thickening agent can be added thereto to "convert" it to a gel. As a thickening agent, use can be made
REFERENCES:
patent: 4120810 (1978-10-01), Palmer
patent: 4983224 (1991-01-01), Mombrun et al.
patent: 5011621 (1991-04-01), Sullivan
patent: 5030290 (1991-07-01), Davis
patent: 5298184 (1994-03-01), Jarema
patent: 5308527 (1994-05-01), Lallier et al.
patent: 5565136 (1996-10-01), Walsh
Maruyama Shizuo
Radu Georges
Asahipen Corporation
E.QU.I.P. International Inc.
Skane Christine
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