C - Chemistry – Metallurgy – 09 – G
Patent
C - Chemistry, Metallurgy
09
G
57/12, 400/5173
C09G 1/02 (2006.01) C09G 1/08 (2006.01) C09K 3/14 (2006.01)
Patent
CA 2007805
This invention relates to a buffing composition, and, in particular, to a composition that imparts a very fine finish to automobile surfaces. In the 1980's, automobile manufacturers began using a base coat/clear coat paint system for automotive surfaces. The base coat imparts the desired color, and the clear coat, which is applied over the base coat, is a transparent, hard, chip-resistant, protective coat. This paint system magnifies painting defects in either the base coat or the clear coat. If the defects cannot be corrected on the assembly line, the automobile must be removed from the line, the defects removed, and the automobile then repainted. This procedure results in a considerable loss of time, and consequently, money for the automobile manufacture. A system, known as the "Finesse-it" system, has been developed for removing paint defects on the assembly line. The system first utilizes a sanding step, employing very fine coated abrasives, to smooth out the defect. Next, the defect is buffed with "Finesse-it" brand finishing material to remove the scratches produced by the coated abrasives. Finally, the residue from the finishing material is removed with a cotton cloth, thereby producing a uniform, glossy finish. The "Finesse-it" finishing material tends to leave a milky haze on the painted surface where the defect was repaired. It would be desirable to use a buffing composition that does not produce haze marks, so that paint defects can continue to be removed on the assembly line. This invention provides a buffing composition for imparting very fine finishes to automobile surfaces that contains no silicone-containing materials and comprises alumina abrasive and a synthetic wax dispersed in a liquid medium. The liquid medium can be a solvent, water, a hydrocarbon oil, or mixtures thereof. The buffing composition can optionally contain other additives or modifiers such as wetting agents, thickeners, stabilizers, preservatives, emulsifiers, dyes, pigments and perfumes.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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