METHOD OF REDUCING YELLOWING OF WATERBORNE ROAD MARKING PAINTS AND COMPOSITION USED THEREIN

• Main Authors: JILEK, JOSEF HANS, SANFILIPPO, ANGELO, TRAPANI, ANDREW PAUL, SCHALL, DONALD CRAIG
• Format: Patent
• Language: English; French
• Published: 27.12.1996
• Edition: 6
• Subjects: ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE; ADHESIVES; BLASTING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; CORRECTING FLUIDS; DYES; FILLING PASTES; FIXED CONSTRUCTIONS; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; INKS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; USE OF MATERIALS THEREFOR; WEAPONS; WOODSTAINS

A water-borne road marking paint composition which includes a chelating agent capable of chelating iron ions to form a substantially colorlesscomplex is provided. A road marking produced from the traffic paint of the present invention substantially reduces or prevents yellowing of white road marking from iron and iron compound debris strewn on the road surfaces. A method of reducing or preventing yellowing of a newly-applied road marking on a road surface of a water-borne road marking paint is also disclosed. The method comprises incorporating in the water-borne road marking paint a chelating agent capable of chelating iron ions to form a substantially colorlesscomplex. Further reduction of yellowing of the road marking is observed when a pigment dispersant is incorporated in the water-borne road marking paint.