Compositions: coating or plastic – Coating or plastic compositions – Polishes
Reexamination Certificate
1999-09-24
2001-02-27
Green, Anthony (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Polishes
C106S010000, C106S271000, C106S287100, C106S287130, C106S287140, C524S062000, C524S462000, C525S276000
Reexamination Certificate
active
06193791
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to the field of liquid, solid and semisolid polish compositions comprising novel fluorochemicals, specifically compositions capable of imparting durable, high-luster finishes to painted surfaces. These compositions exhibit increased ease of removal and provides a durable finish to surfaces.
BACKGROUND
Car owners have a long-standing desire to provide their automobiles with a beautiful, shiny appearance, and to protect the underlying paint from environmental damage such as mud, water spots, and the effects of the sun. Over the years, car owners have come to prefer paste waxes to protect and beautify the exterior painted surfaces of their vehicles because wax finishes are typically more durable than finishes provided by wax-free products. One reason for their durability is that waxes provide harder coatings than greases or oils. Because of their superior hardness, waxes do not thin out when polished to a high-gloss sheen by rubbing with a polishing cloth.
Coatings based on waxes or silicones rely on the low surface energy to bead the water and protect the surface. Performance life is limited by the durability of the coating. Most of these materials are poly(dimethylsiloxane) fluids and paraffin waxes, are difficult to remove, and have limited durability.
Low surface energy coatings for use as automotive or marine waxes are available. These materials are generally silicones, which are expensive, difficult to apply, and have little durability. Paraffin waxes are also used, but these materials are also difficult to apply and remove from the finished surface of an automobile or boat. High molecular weight silicones were added to paraffin waxes to facilitate removal.
During the 1950's, silicone-polymer-containing liquid emulsions supplanted paste waxes as vehicle polishes in the consumer market because these emulsions are generally easier to apply to a car's finish, contained “built-in” road tar removers, and could be polished with less effort. However, those consumers who are more serious about the appearance of their car's finish (i.e., aficionados), and who restore vintage automobiles, continue to believe that higher gloss and durable finishes can only be achieved with paste waxes. These aficionados, as well as a broader class of specialty auto finish consumers, perceive paste wax finishes as being hard and durable and conversely perceive emulsion based finishes as being soft, and easily removed. Furthermore, the specialty market is concerned with other properties of paste wax, for example the subjective feel or “hand” of wax as it is spread out on a painted surface. If the wax is too soft or contains too much non-volatile solvent, the wax can be “smeary” and slow drying. Conversely, if the wax is too hard, it can be difficult to “rub-out.” Thus, there exists a need for a wax composition having desired physical properties including durability, ease of application, and stain resistance.
The addition of fluorochemical additives to automobile/marine compounds, glazes, waxes, and polishes is known. U.S. Pat. No. 5,705,592 (Sejpka et al.) describes a hard surface care material containing solid fluoro-silicone wax which changes the state of aggregation reversibly as result in change in temperature on rubbing giving a water proof, oil proof, and weather resistant surface. U.S. Pat. No. 5,420,015 (Wuerch) describes a non-spotting overspray masking composition for vehicles-includes amount of nonionic fluorochemical surfactant, nonvolatile polyhydroxy component, triethanolamine, and thickener.
SUMMARY OF THE INVENTION
The present invention relates to polish compositions having improved physical and performance properties, including “hand,” detergent resistance (durability), “hardness,” and “rub-out” properties. The polish composition comprises a base component selected from the group of waxes, silicone oils, an mixtures thereof; and an alkylated fluorochemical oligomer comprising an aliphatic backbone with a plurality of pendent fluoroaliphatic groups and fluorine-free aliphatic pendent groups, each fluoroaliphatic group having a fully fluorinated terminal group and each independently linked to a carbon atom of the aliphatic backbone through an organic linking group; (ii) an aliphatic moiety; and (iii) a linking group which links the fluorochenical oligomeric portion to the aliphatic moiety. Addition of these alkylated fluorochemical oligomers to the polish composition results in a substantial decrease in the effort needed to remove the residue left behind during polishing by these products and a substantial increase in the durability of said formulations.
Yet another aspect the present invention relates to a method of protecting a substrate from sources of environmental damage. The sources of environmental damage can include for example, sunlight, rain and acid rain, water spotting, road tar, tree sap. According to the method a substrate having a surface is coated with a continuous layer of the polish composition. The method comprises the steps of providing a substrate, and coating the substrate with the above-described polish composition. Polishes of this invention may be used on automobiles, recreational vehicles, boats, and other finished surfaces. These coatings provide low surface energies to prevent water from standing on the surface and staining painted surfaces by causing water to bead. The described invention would greatly reduce the effort needed to apply these materials to the previously mentioned surfaces.
The present invention also relates to a polish composition that contains an alkoxylated wax that comprises a wax material such as a natural wax, having poly(alkoxy) groups attached to the wax molecules at one or more of a free alcohol group, a free acid group, or an olefinic group. The alkoxylated wax can preferably be prepared by reacting a wax material with an alkylene oxide, such as by reacting a carnauba wax with ethylene or propylene glycol, to attach poly(alkoxy)groups at free alcohol, free acid, or olefinic group within the carnauba wax. The alkoxylated wax of the present invention provides a wax composition that does not phase separate during processing. The alkoxylated wax acts to compatibilize the wax composition, preventing phase separation of the different ingredients of the wax composition. Because the wax does not phase separate, there is no need for the usual precautions taken during processing to prevent the wax composition from phase separating. For instance, the wax composition can be poured into packaging containers in a single pour instead of filling a container in a series of pouring and cooling steps.
As used herein “polish” refers to a substance that imparts smoothness, surface protection and/or a decorative finish to a substrate. The polish may be in solid, liquid or semisolid form and may be in solution, emulsion, suspension or neat.
As used in the present description, “paste” refers to a substance that is macroscopically solid at room temperature and that readily yields under pressure.
“Substrate” refers to surfaces of motor vehicle (e.g., cars, trucks, snowmobiles, motorcycles, etc.) or boat finishes, that can be made of, for example, fiberglass, plastics, and metals, and that can also be coated with a paint finish.
The term “silicone” as used herein includes polydiorganosiloxanes (and moieties derived therefrom) wherein each organo group is independently selected from the group consisting of alkyl groups (such as C1 to C12 alkyl groups, for example).
The term “solvent” refers to a liquid compound which can dissolve or disperse the components of the polish composition.
DETAILED DESCRIPTION
The polish composition of the present invention comprises a base component and an alkylated fluorochemical oligomer (referred to herein as the “oligomer”). The oligomer comprises
(i) an aliphatic backbone with a plurality of pendent fluoroaliphatic and fluorine-free aliphatic pendent groups, each fluoroaliphatic group having a fully fluorinated terminal group and each of pendent fluoroaliphatic and fluo
Jariwala Chetan P.
Vander Louw Steven J.
3M Innovative Properties Company
Green Anthony
Kokko Kent S.
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