Claims
- 1. A modified asphalt composition comprising
- (A) asphalt, and
- (B) about 0.01 to about 10 percent by weight of at least one hydrocarbon-soluble acrylate polymer containing units of the formula ##STR4## wherein R.sup.1 is a lower alkyl group containing form 1 to about 4 carbon atoms, R.sup.2 is a mixture of alkyl groups containing from about 4 to about 20 carbon atoms, and x is an integer providing a weight average molecular weight (Mw) to the acrylate polymer of about 100,000 to 700,000.
- 2. The asphalt composition of claim 1 wherein R.sup.1 is a methyl group.
- 3. The asphalt composition of claim 1 wherein R.sup.2 is a mixture of alkyl groups containing from about 4 to about 18 carbon atoms.
- 4. A modified asphalt composition comprising
- (A) asphalt, and
- (B) from about 0.01 to about 10% by weight, based on the weight of the asphalt, of at least one hydrocarbon-soluble methacrylate polymer containing units having the formula ##STR5## wherein R.sup.2 is a mixture of alkyl groups containing form about 4 to about 20 carbon atoms, and x is an integer providing the weight average molecular weight (Mw) to the polymer of from about 100,000 to about 1,000,000.
- 5. The asphalt composition of claim 4 wherein the molecular weight of the polymer is from about 300,000 to about 700,000.
- 6. The asphalt composition of claim 4 wherein R.sup.2 is a mixture of alkyl groups containing from about 4 to about 18 carbon atoms.
- 7. The asphalt composition of claim 4 containing from about 0.1 to about 5% by weight of polymer (B).
- 8. A modified asphalt composition capable of improving the durability characteristics of an aggregate-containing composition made therefrom comprising
- (A) a substantially unblown and unoxidized asphalt, and
- (B) from about 0.01 to about 10% by weight, based on the weight of the asphalt, of at least one methacrylate polymer containing units of the formula ##STR6## wherein R.sup.2 is a mixture of alkyl groups containing from about 4 to about 20 carbon atoms, and x is an integer providing a weight average molecular weight to the polymer of from about 100,000 to about 1,000,000.
- 9. The asphalt composition of claim 8 containing from about 0.1 to about 5% by weight of (B).
- 10. The asphalt composition of claim 8 wherein the molecular weight of the polymer is from about 300,000 to about 700,000.
- 11. A paving composition containing the modified asphalt composition of claim 1 plus aggregate.
- 12. A paving composition containing the modified asphalt composition of claim 8 plus aggregate.
- 13. The asphalt composition of claim 1 wherein the asphalt (A) is an asphalt emulsion or cutback.
- 14. The asphalt composition of claim 8 wherein the asphalt (A) is an asphalt emulsion or cutback.
- 15. A modified asphalt roofing composition, comprising:
- (A) an asphalt selected from the group consisting of oxidized asphalt and blown asphalt; and
- (B) about 0.01 to about 10 percent by weight of a hydrocarbon-soluble acrylate polymer containing units having the formula ##STR7## wherein R.sup.1 is a lower alkyl group containing from 1 to about 4 carbon atoms, R.sup.2 is a mixture of alkyl groups containing from about 4 to about 20 carbon atoms, and x is an integer providing a weight average molecular weight (Mw) to the acrylate polymer of about 100,000 to 1,000,000.
Parent Case Info
This is a continuation of application Ser. No. 024,188, filed on Mar. 10, 1987, now U.S. Pat. No. 4,833,184.
US Referenced Citations (18)
Foreign Referenced Citations (3)
Number |
Date |
Country |
1017722 |
Dec 1954 |
DEX |
2331727 |
Jun 1973 |
DEX |
594455 |
Nov 1947 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Mark et al. "Encyclopedia of Polymer Science and Engineering", John Wiley & Sons, 1985 Second Edition, p. 260. |
Continuations (1)
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Number |
Date |
Country |
Parent |
24188 |
Mar 1987 |
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