Polishing compositions with optical brighteners
阅读：835发布：2022-11-09
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1. A POLISHING COMPOSITION DRIABLE TO A RELATIVELY SMOOTH SURFACE, CONSISTING ESSENTIALLY OF; A CONTINUOUS AQUEOUS PHASE; A DISPERSED, NON-VOLATILE, WATER-INSOLUBLE SOLID FILM-FORMER CONSISTING OF AT LEAST ABOUT 25 PERCENT BY WEIGHT OF ACRYLIC PLASTIC AND CAPABLE OF BEING DEPOSITED IN A RELATIVELY SMOOTH PROTECTIVE FILM UPON EVAPORATION OF THE AQUEOUS CONSTITUENT OF SAID AQUEOUS PHASE; A SMALL AMOUNT OF DISPERSING AGENT PRESENT IN THE AQUEOUS PHASE IN AN AMOUNT SUFFICIENT TO FORM A STABLE DISPERSION OF THE FILM FORMER IN THE AQUEOUS PHASE WITH THIS DISPERSION BREAKAGE DOWN UPON EVAPORATION OF THE AQUEOUS CONSTITUENT OF THE PHASE TO FORM A THIN LAYER OF FILM FORMER IN A RELATIVELY SMOOTH PROTECTIVE LAYER ON SAID SURFACE; AND AS A BRILLIANCE-PRODUCING AGENT, AT LEAST ABOUT 1 PERCENT BY WEIGHT OF THE SOLIDS CONTENT OF THE COMPOSITION, AND UP TO ABOUT 30 PERCENT BY WEIGHT OF THE SOLIDS CONTENT OF THE COMPOSITION, OF OPTICL BRIGHTENING MATERIAL, SAID OPTICAL BRIGHTENING MATERIAL HAVING SUBSTANTIAL CAPACITY FOR ABSORPTION OF LIGHT ENERGY ONLY OF THE ULTRAVIOLET AND INFRARED REGIONS OF THE SPECTRUM.
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