Asphalt emulsions
AssigneeWitco Corporation
InventorsRoger K. Chatterjee, Charles R. Milburn
Life of this patent
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Abstract
Disclosed are oil-in-water asphalt emulsions comprising asphalt dispersed as the discontinuous phase in an aqueous continuous phase, the emulsions containing one or more anionic emulsifiers selected from the group consisting of compounds of the formulas (Ia), (Ib), (II), and (III) (R.sup.1 CH(OH)--(CH.sub.2).sub.m SO.sub.3).sub.1 X (Ia) (R.sup.1 CH.dbd.CH(CH.sub.2).sub.m-1 SO.sub.3).sub.1 X (Ib) (R.sup.2 O--(AlkO).sub.c CH.sub.2 COO).sub.1 X (II) ((R.sup.3).sub.x --(A)--SO.sub.3).sub.1 X (III) wherein R.sup.1, R.sup.2, and R.sup.3 are C.sub.6-40 hydrocarbyl, m is 1-10, X is --H or a cation, c is 1-20, A is phenyl or polycyclic aromatic, k is 1-3, and i is the valence of X.
Claims17
An oil-in-water asphalt emulsion, comprising
- (A) water as the continuous phase;
- (B) one or more emulsifiers selected from the group consisting of (i) compounds of the formula (Ia), (Ib)
- (R.sup.1 CH(OH)--(CH.sub.2).sub.m SO.sub.3).sub.1 X (Ia)
- (R.sup.1 CH.dbd.CH(CH.sub.2).sub.m-1 SO.sub.3).sub.1 X (Ib)
- and mixtures thereof, wherein R.sup.1 contains 6 to 40 carbon atoms and is straight or branched aliphatic, aromatic, alkyl-aromatic, aromatic-alkyl, or alkyl-aromatic-alkyl, m is 1-10, X is hydrogen, sodium, potassium, lithium, calcium, ammonium, an amine of the formula --N.sup.+ H(C.sub.1-20 alkyl).sub.2 or --N.sup.+ H.sub.2 (C.sub.1-20 alkyl), and i is 1 or more and is the valence of X;
- (ii) compounds of the formula (II)
- R.sup.2 O--(AlkO).sub.c CH.sub.2 COOX (II)
- wherein X is defined above, R.sup.2 contains 6 to 40 carbon atoms and is straight or branched aliphatic, aromatic, alkyl-aromatic, aromatic-alkyl, or alkyl-aromatic-alkyl, each Alk is C.sub.2 H.sub.4, C.sub.3 H.sub.6 or C.sub.4 H.sub.8, and c is 1-200;
- and
- (iii) compounds of the formula (III)
- ((R.sup.3).sub.x --(A)--SO.sub.3).sub.i X (III)
- wherein R.sup.3 is straight or branched aliphatic, aromatic-alkyl, or alkyl-aromatic-alkyl, A is phenyl or naphthyl, k is 1, 2 or 3, and X and i are as defined above;
- (c) asphalt, comprising a discontinuous phase uniformly dispersed in said emulsion;
- and
- (d) finely divided particulate filler uniformly distributed throughout said emulsion.
Dependencies are inferred from the claim text.