US4240946A
Expired / Lapsed
US
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Method of preparing a bituminuous binder and a construction material containing the same
Assignee: Novophalt SA
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Filing: 1979-01-16
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Granted: 1980-12-23
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Expires: 1999-01-16
Abstract
Abstract The invention relates to the preparation of a bituminous binder on the basis of bitumen and polyolefin. This binder is prepared in a hot mixing and homogenizing process, the homogenizing being continued until the viscosity of the binder in the course of this homogenizing being distinctly or significantly reduced. The invention also relates to the preparation of a road construction material using this binder, the inorganic additive material being heated before mixing with the binder to a temperature below the decomposition temperature of the binder.
Inventors
- 👤 Rudolf Hemersam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
97 words
A method for preparing a bituminous, polyolefin-containing binder for a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen and polyethylene in a hot state while melting and dissolving the polyethylene in the bitumen to form a binder mass, the bitumen-polyethylene binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of said mass attendant upon a mere rise to said temperature of said mass.
Claim 2
Independent Claim
97 words
A method for preparing a bituminous, polyolefin-containing binder for a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen and polyethylene in a hot state while melting and dissolving the polyethylene in the bitumen to form a binder mass, the bitumen-polyethylene binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of said mass attendant upon a mere rise to said temperature of said mass.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein the molten bitumen and polyethylene are homogenized at a temperature of about 290° C.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the molten bitumen and polyethylene are homogenized at a substantially constant temperature.
Claim 5
Dependent Claim
26 words
The method of claim 1, wherein at least 10%, by weight, based on the weight of the bitumen, of the polyethylene is added to the bitumen.
Claim 6
Dependent Claim
27 words
The method of claim 4, wherein between 30% and 100%, by weight, based on the weight of the bitumen, of the polyethylene is added to the bitumen.
Claim 7
Dependent Claim
19 words
The method of claim 1, wherein the binder mass is mixed and homogenized at said temperature for several hours.
Claim 8
Dependent Claim
46 words
The method of claim 1, wherein the binder mass is mixed and homogenized until the viscosity of the mass has been reduced by one fifth to one tenth of the viscosity the binder mass has immediately after the polyethylene has been dissolved in the molten bitumen.
Claim 9
Dependent Claim
33 words
The method of claim 1, which further comprises measuring the melt index of the binder mass repeatedly during the mixing and homogenizing to determine the reduction of the viscosity of the binder mass.
Claim 10
Dependent Claim
21 words
The method of claim 1, which further comprises adding additional bitumen to the binder mass after it has been completely homogenized.
Claim 11
Dependent Claim
22 words
The method of claim 9, wherein the additional bitumen is added to the binder mass after an intermediate storage of the mass.
Claim 12
Independent Claim
97 words
A method for preparing a bituminous, polyolefin-containing binder for a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen and polypropylene in a hot state while melting and dissolving the polypropylene in the bitumen to form a binder mass, the bitumen-polypropylene binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of said mass attendant upon a mere rise to said temperature of said mass.
Claim 13
Independent Claim
97 words
A method for preparing a bituminous, polyolefin-containing binder for a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen and polypropylene in a hot state while melting and dissolving the polypropylene in the bitumen to form a binder mass, the bitumen-polypropylene binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of said mass attendant upon a mere rise to said temperature of said mass.
Claim 14
Dependent Claim
20 words
The method of claim 11, wherein the molten bitumen and polypropylene are homogenized at a temperature of about 290° C.
Claim 15
Dependent Claim
18 words
The method of claim 11, wherein the molten bitumen and polypropylene are homogenized at a substantially constant temperature.
Claim 16
Dependent Claim
26 words
The method of claim 11, wherein at least 10%, by weight, based on the weight of the bitumen, of the polypropylene is added to the bitumen.
Claim 17
Dependent Claim
27 words
The method of claim 14, wherein between 30% and 100%, by weight, based on the weight of the bitumen, of the polypropylene is added to the bitumen.
Claim 18
Dependent Claim
19 words
The method of claim 11, wherein the binder mass is mixed and homogenized at said temperature for several hours.
Claim 19
Dependent Claim
46 words
The method of claim 11, wherein the binder mass is mixed and homogenized until the viscosity of the mass has been reduced by one fifth to one tenth of the viscosity the binder mass has immediately after the polypropylene has been dissolved in the molten bitumen.
Claim 20
Dependent Claim
33 words
The method of claim 11, which further comprises measuring the melt index of the binder mass repeatedly during the mixing and homogenizing to determine the reduction of the viscosity of the binder mass.
Claim 21
Dependent Claim
21 words
The method of claim 11, which further comprises adding additional bitumen to the binder mass after it has been completely homogenized.
Claim 22
Dependent Claim
22 words
The method of claim 19, wherein the additional bitumen is added to the binder mass after an intermediate storage of the mass.
Claim 23
Independent Claim
100 words
A method for preparing a butuminous, polyolefin-containing binder for a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen, polyethylene and polypropylene in a hot state while melting and dissolving the polyethylene and polypropylene in the bitumen to form a binder mass, the bitumen-polyethylene-polypropylene binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of the mass attendant upon a mere rise to said temperature of said mass.
Claim 24
Independent Claim
100 words
A method for preparing a butuminous, polyolefin-containing binder for a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen, polyethylene and polypropylene in a hot state while melting and dissolving the polyethylene and polypropylene in the bitumen to form a binder mass, the bitumen-polyethylene-polypropylene binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of the mass attendant upon a mere rise to said temperature of said mass.
Claim 25
Dependent Claim
22 words
The method of claim 21, wherein the molten bitumen and polyethylene and polypropylene are homogenized at a temperature of about 290° C.
Claim 26
Dependent Claim
20 words
The method of claim 21, wherein the molten bitumen and polyethylene and polypropylene are homogenized at a substantially constant temperature.
Claim 27
Dependent Claim
28 words
The method of claim 21, wherein at least 10%, by weight, based on the weight of the bitumen, of the polyethylene and polypropylene is added to the bitumen.
Claim 28
Dependent Claim
29 words
The method of claim 24, wherein between 30% and 100%, by weight, based on the weight of the bitumen, of the polyethylene and polypropylene is added to the bitumen.
Claim 29
Dependent Claim
19 words
The method of claim 21, wherein the binder mass is mixed and homogenized at said temperature for several hours.
Claim 30
Dependent Claim
48 words
The method of claim 21, wherein the binder mass is mixed and homogenized until the viscosity of the mass has been reduced by one fifth to one tenth of the viscosity the binder mass has immediately after the polyethylene and polypropylene has been dissolved in the molten bitumen.
Claim 31
Dependent Claim
33 words
The method of claim 21, which further comprises measuring the melt index of the binder mass repeatedly during the mixing and homogenizing to determine the reduction of the viscosity of the binder mass.
Claim 32
Dependent Claim
21 words
The method of claim 21, which further comprises adding additional bitumen to the binder mass after it has been completely homogenized.
Claim 33
Dependent Claim
22 words
The method of claim 29, wherein the additional bitumen is added to the binder mass after an intermediate storage of the mass.
Claim 34
Independent Claim
134 words
A method for preparing a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen and at least 10%, by weight, based on the weight of the bitumen, of at least one polyolefin selected from the group consisting of polyethylene and polypropylene in a hot state while melting and dissolving the polyolefin in the bitumen to form a binder mass, the bitumen-polyolefin binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of said mass attendant upon a mere rise to said temperature of said mass, preheating the additives, and mixing the homogenized binder mass at an elevated temperature with the preheated additives.
Claim 35
Independent Claim
134 words
A method for preparing a road construction material containing dispersed solid additives of a predominantly inorganic nature, which comprises mixing and homogenizing molten bitumen and at least 10%, by weight, based on the weight of the bitumen, of at least one polyolefin selected from the group consisting of polyethylene and polypropylene in a hot state while melting and dissolving the polyolefin in the bitumen to form a binder mass, the bitumen-polyolefin binder mass being homogenized at a temperature between 260° C. and 310° C. until a significant reduction of the viscosity of the binder mass occurs which exceeds a decrease of the viscosity of said mass attendant upon a mere rise to said temperature of said mass, preheating the additives, and mixing the homogenized binder mass at an elevated temperature with the preheated additives.
Claim 36
Dependent Claim
22 words
The method of claim 31, wherein the binder mass and additional bitumen are added to the preheated additives separately from each other.
Claim 37
Dependent Claim
33 words
The method of claim 31, wherein the additives are preheated to a temperature between 200° C. and 280° C. but at least 10° C. less than the decomposition temperature of the binder mass.
Claim 38
Dependent Claim
13 words
The method of claim 31, wherein the additives consist of acidic stone material.
Claim 39
Dependent Claim
16 words
The method of claim 34, wherein the acidic stone material is quartz sand or quartz gravel.
References Cited (Backward Citations)
US3317447A
Cited
US3853800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |