| 摘要 |
An improved clay-stabilized bituminous emulsion surface-coating composition and method of preparation therefore, including an aqueous bituminous emulsion and a surfactant selected from the group consisting of neutral polyamines, partially and fully acid-neutralized polyamine salts, and mixtures thereof having the structural formula [R(NH2R'')nNHn,]+Yz Y(X-z) wherein R is a lipophile selected from the group consisting of R'C(O)-, (acyl), R'-, (alkyl), and R'OR''-(alkoxyalkyl), R' is an alkyl chain having 3-26 carbon atoms, R'' is a hydrocarbon fragment having from 2-6 carbon atoms, n is an integer from 0-4, n' is an integer from 2-3, z is an integer from 0-5 corresponding to the degree of surfactant neutralization and positive charge, X is an anion selected from the group consisting of fully- or partially-unprotonated mono- or polyacids, and Y is an integer from 0-5 corresponding to the number of anions having a negative z charge. Such surfactant is present in an amount sufficient to provide an emulsion with stable gel structure and may be post-added to the bituminous emulsion with a minimum of stirring, immediately before application, if necessary.
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