Mannich reaction product as asphalt antistripping agent
AssigneeThe Lubrizol Corporation
InventorJoseph L. Kostusyk
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Abstract
An asphalt cement mixture is disclosed. The mixture has improved antistripping properties due to the inclusion therein of a minor amount of an antistripping agent produced by the condensation reaction of an amine, an aldehyde or aldehyde reaction synthon an alkylated phenol. The antistripping agent is preferably present in the asphalt cement in an amount of from about 0.25% to about 1% by weight based on the weight of the asphalt cement. The asphalt cement is combined with an aggregate to form a concrete and paved onto a road surface to provide a paved surface with improved durability.
Claims21
A method for improving antistripping properties of an asphalt comprising adding to the asphalt in an amount in the range of about 0.1% to about 5% by weight based on the weight of the asphalt, a compound produced by reacting (A) an amine, (B) an aldehyde or aldehyde reaction synthon, and (C) an alkylated phenol wherein the molar ratio of (A):(B):(C) is in the range of (1):(1-8):(1-30).
An asphalt cement mixture having therein from about 0.1% to about 5% by weight of an antistripping agent based on the weight of the asphalt cement, wherein said antistripping agent is produced by the condensation reaction of (A) an amine, (B) an aldehyde or aldehyde reaction synthon, and (C) an alkylated phenol wherein the molar ratio of (A):(B):(C) is in the range of (1):(1-8):(1-30).
An asphalt cement mixture comprised of a major amount of asphalt cement and from about 0.1% to about 5% by weight of an antistripping agent based on the weight of the asphalt cement, wherein said antistripping agent is in the form of a composition containing a statistical mixture of compounds encompassed by the general structural formula (I):
- ##STR8## wherein R.sub.1 and R.sub.2 are each independently an alkyl moiety and w, x, y and z are integers and vary over a range of from 0 to 30 such that the average of w, x, y, and z is greater than 1, and PA.sub.1, PA.sub.2, and PA.sub.3 are independently a polyamine moiety it being understood that if any of w, x y or z is 0, the next adjoining group binds or in the case of a terminal group, hydrogen is present.
Dependencies are inferred from the claim text.