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Patent US5047457A successfully refreshed from Google Patents.
US5047457A
Expired / Lapsed
US
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Acrylate polymer modified asphalt compositions
Assignee: Lubrizol Corp
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Filing: 1989-01-25
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Granted: 1991-09-10
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Expires: 2009-01-25
Abstract
Abstract Modified asphalt compositions are described which comprise (A) asphalt, and (B) a minor effective amount, sufficient to improve the durability of the asphalt in service, of at least one hydrocarbon-soluble acrylate polymer of the formula ##STR1## wherein R 1 is a lower alkyl group containing from 1 to about 4 carbon atoms, R 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 5000 to about 1,000,000. Generally, the modified asphalt compositions will contain from about 0.01 to about 10% by weight, based on the weight of the asphalt, of the acrylate polymer as defined. The modified asphalt compositions of the present invention are useful in roofing and in preparing aggregate-containing asphalt concretes which can be employed as paving compositions.
Inventors
- 👤 William A. Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:02
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
84 words
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 1 is a lower alkyl group containing form 1 to about 4 carbon atoms, R 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.
Claim 2
Dependent Claim
84 words
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 1 is a lower alkyl group containing form 1 to about 4 carbon atoms, R 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.
Claim 3
Dependent Claim
13 words
The asphalt composition of claim 1 wherein R 1 is a methyl group.
Claim 4
Dependent Claim
24 words
The asphalt composition of claim 1 wherein R 2 is a mixture of alkyl groups containing from about 4 to about 18 carbon atoms.
Claim 5
Dependent Claim
77 words
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 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.
Claim 6
Dependent Claim
77 words
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 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.
Claim 7
Dependent Claim
20 words
The asphalt composition of claim 4 wherein the molecular weight of the polymer is from about 300,000 to about 700,000.
Claim 8
Dependent Claim
24 words
The asphalt composition of claim 4 wherein R 2 is a mixture of alkyl groups containing from about 4 to about 18 carbon atoms.
Claim 9
Dependent Claim
18 words
The asphalt composition of claim 4 containing from about 0.1 to about 5% by weight of polymer (B).
Claim 10
Dependent Claim
92 words
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 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.
Claim 11
Dependent Claim
92 words
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 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.
Claim 12
Dependent Claim
17 words
The asphalt composition of claim 8 containing from about 0.1 to about 5% by weight of (B).
Claim 13
Dependent Claim
20 words
The asphalt composition of claim 8 wherein the molecular weight of the polymer is from about 300,000 to about 700,000.
Claim 14
Dependent Claim
13 words
A paving composition containing the modified asphalt composition of claim 1 plus aggregate.
Claim 15
Dependent Claim
13 words
A paving composition containing the modified asphalt composition of claim 8 plus aggregate.
Claim 16
Dependent Claim
16 words
The asphalt composition of claim 1 wherein the asphalt (A) is an asphalt emulsion or cutback.
Claim 17
Dependent Claim
16 words
The asphalt composition of claim 8 wherein the asphalt (A) is an asphalt emulsion or cutback.
Claim 18
Dependent Claim
95 words
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 1 is a lower alkyl group containing from 1 to about 4 carbon atoms, R 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.
Claim 19
Dependent Claim
95 words
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 1 is a lower alkyl group containing from 1 to about 4 carbon atoms, R 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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |