US4895754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil treated mineral filler for asphalt
Assignee: 3M Co
•
Filing: 1989-01-24
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Granted: 1990-01-23
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Expires: 2009-01-24
Abstract
Abstract Use of surface modification treatment on mineral fines to obtain higher filler loadings in asphalt used for roofing shingles. Mineral fines are coated with oil such as a petroleum oil at about the 0.25-1.0 percent level before they are incorporated into molten asphalt. This treatment makes minerals which otherwise would be uncompetitive with traditional fillers, such as limestone, sufficiently compatible with asphalt to be a viable alternative to limestone. Nepheline syenite mineral fines treated in this manner have been successfully incorporated into asphalt for shingles at a loading of 65-70%.
Inventors
- 👤 Joseph Graham
- 👤 Billy L. George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:17
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C08L; C08L95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A composition comprising asphalt and from greater than 0 to 75 weight percent of a treated inorganic rock particulate filler having a particle size useful in asphalt coating compositions, the particles of said treated inorganic rock particulate being combined with an oil, which is compatible with asphalt, in a proportion of less than about 20 percent by weight oil in the inorganic rock particulate.
Claim 2
Dependent Claim
64 words
A composition comprising asphalt and from greater than 0 to 75 weight percent of a treated inorganic rock particulate filler having a particle size useful in asphalt coating compositions, the particles of said treated inorganic rock particulate being combined with an oil, which is compatible with asphalt, in a proportion of less than about 20 percent by weight oil in the inorganic rock particulate.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein the treated inorganic rock particulate is comprised of 0.1 to 1.0 weight percent oil.
Claim 4
Dependent Claim
25 words
The composition of claim 1 wherein the proportion of oil in the treated inorganic rock particulate yields a particulate which has at least minimum flowability.
Claim 5
Dependent Claim
22 words
The composition of claim 1 wherein the inorganic rock particulate comprises particles within the size range of about 45 to 250 micrometers.
Claim 6
Dependent Claim
41 words
The composition of claim 1 wherein the inorganic rock particulate is selected from minerals having the following composition: ______________________________________
Weight Percent
______________________________________
SiO.sub.2 50-75
Al.sub.2 O.sub.3
14-20
Fe.sub.2 O.sub.3
3-10
CaO 1.5-12
MgO 0.5-8
Na.sub.2 O 2.0-7
K.sub.2 O 0.3-7
______________________________________
Claim 7
Dependent Claim
13 words
Fabric mat which is coated or impregnated with the composition of claim 1.
Claim 8
Dependent Claim
9 words
A shingle comprising the fabric mat of claim 6.
Claim 9
Independent Claim
112 words
A method for making a filled asphalt blend comprising the steps of: A. providing quantities of the following raw materials: asphalt, inorganic rock particulate, and oil compatible with asphalt; B. mixing the inorganic rock particulate and the oil in such a way that the oil becomes coated onto the particles of the inorganic rock particulate using proportions such that the oil comprises less than 20 weight percent of the resulting blend; and C. mixing the oil treated inorganic rock particulate from step B with a quantity of the asphalt made molten in a proportion such that the filler comprises from greater than 0 to 75 weight percent of the resulting filled asphalt.
Claim 10
Independent Claim
112 words
A method for making a filled asphalt blend comprising the steps of: A. providing quantities of the following raw materials: asphalt, inorganic rock particulate, and oil compatible with asphalt; B. mixing the inorganic rock particulate and the oil in such a way that the oil becomes coated onto the particles of the inorganic rock particulate using proportions such that the oil comprises less than 20 weight percent of the resulting blend; and C. mixing the oil treated inorganic rock particulate from step B with a quantity of the asphalt made molten in a proportion such that the filler comprises from greater than 0 to 75 weight percent of the resulting filled asphalt.
References Cited (Backward Citations)
US4382989A
Cited
DD214853A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |