Method of producing wear resistant traffic markings
AssigneeRohm and Haas Company
InventorsDonald Craig Schall, Alvin Charles Lavoie, Francis Joseph Landy, Steven Scott Edwards
Life of this patent
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Abstract
The present invention is directed to a method of producing wear resistant traffic paint composition. In accordance with the method, a traffic marking of a traffic paint composition having low GPC number average molecular weight latex binder when applied to the road surface exhibits improved wear resistance over those traffic paint compositions having high GPC number average molecular weight latex binders. The wear resistance is further enhanced by modifying the latex polymer used in the composition with acetoacetyl functional pendant moiety and amino silane.
Claims18
A method for producing a wear resistant traffic marking on a road surface comprising;
- applying on said road surface a layer of a traffic paint composition containing a latex binder in an aqueous evaporable carrier, said latex binder having a Tg in the range varying from 0.degree. C. to 60.degree. C., a gel permeation chromatography number average molecular weight in the range varying from 1,000 to less than 30,000;
- and
- evaporating said aqueous evaporable carrier from said layer to form said wear resistant traffic marking on said road surface, said layer having a no-pick-up time, as evaluated under ASTM D711-89, varying in the range of from 1 minute to 60 minutes at a relative humidity in the range of from 65 to 90 percent.
A method for producing a wear resistant traffic marking on a road surface comprising:
- applying on said road surface a layer of a traffic paint composition containing an aminosilane added to an aqueous evaporable carrier maintained at a pH in the range of from of 7.5 to 11.0 and having dispersed therein particles of a latex binder bearing an add functional pendant moiety and an enamine functional pendant moiety, wherein said enamine functional pendant moiety results from the reaction of an acetoacetyl functional pendant moiety on said latex binder with ammonia or amine, said binder having a Tg in range varying from 0.degree. C. to 60.degree. C., a gel permeation chromatography number average molecular weight in the range varying from 1,000 to 1000,000, and an acid number in the range varying from 0.1 to 390;
- and
- evaporating said aqueous evaporable carrier from said layer to form said traffic marking having improved wear resistance, said layer having a no-pick-up time, as evaluated under ASTM D711-89, varying in the range of from 1 minute to 60 minutes at a relative humidity in the range of from 65 to 90 percent.
A method for producing a wear resistant traffic marking on a road surface comprising:
- applying on said road surface a layer of a traffic paint composition containing an aqueous evaporable carrier having dispersed therein particles of a latex binder bearing an acid functional pendant moiety and an enamine functional pendant moiety, wherein said enamine functional pendant moiety results from the reaction of an acetoacetyl functional pendant moiety on said latex binder with ammonia or amine, said binder having a Tg in range varying from 0.degree. C. to 60.degree. C., a gel permeation chromatography number average molecular weight in the range varying from 1,000 to 1000,000 and an acid number in the range varying from 0.1 to 390, and
- (a) a blend of said latex binder with 0 to 20 weight percent based on the total weight of binder solids of a polyfunctional amine, or
- (b) an amine modified latex binder, or
- (c) a combination of said blend and said amine modified latex binder,
- wherein said latex binder and said amine modified latex binder are anionically stabilized, and
- wherein said aqueous evaporable carrier comprises an amount of a volatile base sufficient to raise the pH of said aqueous evaporable carrier to a point where essentially all of said polyfunctional amine in said blend, or essentially all of said amine modified latex binder, or essentially all of said combination of said blend and said amine modified latex binder is in a deprotonated state;
- and
- evaporating said aqueous evaporable carrier from said layer to form said traffic marking having improved wear resistance, said layer having a no-pick-up time, as evaluated under ASTM D711-89, varying in the range of from 1 minute to 60 minutes at a relative humidity in the range of from 65 to 90 percent.
Dependencies are inferred from the claim text.