Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-10-11
1999-08-03
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
059325305
DESCRIPTION:
BRIEF SUMMARY
The present invention broadly relates to compositions usually referred "paint removers" in the trade, which are used for removing paint from a substrate, such as wood, metal like iron or steel, or plastic material like polypropylene.
More particularly, the invention relates to 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.
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 knows products also are either hydrophobic or hydrophillic, thereby further restricting their uses.
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.
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, 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: dimethyl succinate, dimethyl glutarate, dimethyl adipate and mixtures thereof; consisting of terpene derivatives and mixtures thereof; compound selected from the group consisting of C.sub.12 -C.sub.15 alcohols, ethoxylated C.sub.12 -C.sub.15 -alcohols and their mixtures, and 0.5 to 2% of an ethoxylated nonylphenol derivative of the formula: C.sub.9 H.sub.18 C.sub.6 H.sub.4 O(CH.sub.2 CH.sub.2 --O).sub..alpha. H where .alpha. is an interger ranging from 4 to 11.
In the above formulation as well as every where else in the following description and accompanying claims, the percentage are expressed by weight unless otherwise specified.
Advantageously, the composition may also comprise:
Preferably, the water immiscible compound is selected from the group consisting of d-limonene, dipentene, terpinolene, terpene alcohols, turpentine oil and their mixtures. The preferred compounds are d-limonene and terpene alcohols, 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 of up to 1.2% by weight and preferably of 0.8% of hydroxypropyl methyl cellulose.
The composition according to the invention whatever be is form can also contain up to 0.05% of a pigment to color it.
As aforesaid, the composition according to the invention is very efficient as a paint remover, whatever be the type of paint and type of substrate for it. Tests carried out by the Applicant have shown that its viscosity and gel stability (when in the form of a gel) are very good, even after two weeks at 50.degree. C. No metal corrosion has been noticed, even after 3 months. Since the constituents of the composition do not contain fluoride, it does not cause ozone layer depletion. Its toxicity is low and its biodegrability complete. As a matter of fact, the composition according to the invention is both combustible and recyclable. As aforesaid, it is partially m
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Maruyama Shizuo
Radu Georges
E.QU.I.P. International Inc.
Skane Christine
LandOfFree
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