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US 4,786,329 AGranted
Asphalt compositions containing anti-stripping additives prepared from amines or polyamines and phosphonates
AssigneeThe Dow Chemical Company
InventorsDane Chang, Druce K. Crump
Life of this patent
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Abstract
Asphalt compositions are improved by incorporating therein the reaction product of (a) a phosphorus-containing compound, (b) an amine or polyamine and (c) a carbonyl-containing compound as an anti-stripping agent. These asphalt compositions are useful as a pavement material by blending with an aggregate.
Claims13
A composition which comprises a blend comprising:
- (A) bituminous material and
- (B) the product resulting from reacting at conditions sufficient to complete the reaction of
- (1) at least one phosphorus-containing compound represented by the following formula I ##STR6## wherein R.sup.1 and R.sup.2 are independently hydrogen or a monovalent hydrocarbyl group having from 1 to about 20 carbon atoms but only one of R.sup.1 and R.sup.2 can be hydrogen;
- (2) at least one material selected from
- (a) at least one organic amine;
- (b) at least one organic polyamine;
- (c) at least one hydrohalide salt of an organic amine;
- (d) at least one hydrohalide salt of an organic polyamine;
- or
- (e) a combination of any two or more of (a), (b), (c) or (d);
- and
- (3) at least one carbonyl-containing compound which will react with the phosphorus-containing compound;
- wherein components (1), (2) and (3) are employed in quantities which provide a ratio of carbonyl groups:phosphorus atoms:amine hydrogen atoms of from about 0.1:0.1:1 to about 2:1.5:1;
- and
- wherein components (A) and (B) are employed in quantities which provide from about 0.05 to about 10 percent by weight of component (B) based upon the weight of component (A).
12 more elements
A composition which comprises a blend of
- (A) a bituminous material and
- (B) at least one anti-stripping additive represented by the following formulas V, VI or VII ##STR8## wherein Q' is (R.sup.7).sub.2 N--, or (CH.sub.3 O).sub.3 Si--;
- each R.sup.5 is independently a divalent hydrocarbyl group having from 1 to about 36 carbon atoms;
- each R.sup.6 is independently hydrogen or an alkyl or haloalkyl group having from 1 to about 4 carbon atoms;
- each R.sup.7 is independently hydrogen, a hydrocarbyl group or hydroxyl or amine substituted hydrocarbyl group having from about 1 to about 36 carbon atoms or a group represented by the following formula VIII ##STR9## wherein Q is a divalent aliphatic hydrocarbyl group having from 1 to about 20 carbon atoms;
- and each R.sup.1 and R.sup.2 are independently hydrogen or a monovalent hydrocarbyl group having from 1 to about 20 carbon atoms;
- each R.sup.8 is independently hydrogen or a group represented by formula VIII;
- Z is a polyvalent hydrocarbyl group having from 2 to about 8, suitably from 2 to about 5 carbon atoms;
- m has a value from zero to about 8;
- m' has a value from 1 to about 4;
- n has a value of 2 or 3;
- n' has a value from 1 to about 10;
- y has a value from 1 to about 20;
- and y' has a value from about 2 to about 8;
- with the proviso that at least about 10 percent of the R.sup.7 and R.sup.8 groups are a group represented by formula VIII as previously defined;
- and
- wherein components (A) and (B) are employed in quantities which provide from about 0.05 to about 10 percent by weight of component (B) based upon the weight of component (A).
14 more elements
Dependencies are inferred from the claim text.