CA1260653A - Modified asphalt - Google Patents
Modified asphaltInfo
- Publication number
- CA1260653A CA1260653A CA000487819A CA487819A CA1260653A CA 1260653 A CA1260653 A CA 1260653A CA 000487819 A CA000487819 A CA 000487819A CA 487819 A CA487819 A CA 487819A CA 1260653 A CA1260653 A CA 1260653A
- Authority
- CA
- Canada
- Prior art keywords
- asphalt
- composition
- bis
- stearoylamide
- softening point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Bis-stearoylamide is blended into a petroleum-derived asphalt to increase the softening point of the asphalt while maintaining its viscosity.
Bis-stearoylamide is blended into a petroleum-derived asphalt to increase the softening point of the asphalt while maintaining its viscosity.
Description
`` ~260653 This invention pertains to modified asphalts.
In one of its more specific aspects, this invention pertains to asphalts modified with synthetic waxes to form compositions particularly suitable as coatings and saturants.
It i.s well known i.n the art oE roofing shingle production, to employ aspha~t-based compositions as saturants on base materials such as felt, glass fibers, asbes-tos and the like. As extenders, it is customary to include in the coating certain filler materials which increase the quantity Of material saturatable by the asphalt, which materials act to absorb wear on the shingle. Such fillers, however, at to increase the viscosity of the asphalt making it less penetratable of the base materials and requiring that the application of the asphalt to the base materials be made at higher temperatures to compensate for the increase in viscosity of the asphalt upon addition of the filler.
It is also well known in the art tha-t various materials can be blended wi-th asphalt to lower the viscosity at processing temperatures, thereby enabling easier processing.
For example, in U.S. Patent 4,282,038, to Earing, gilsonite, a naturally occurring asphalt, is modified by the addition of a process oil to reduce the viscosity of the asphalt during processing. It is also known to add waxes to asphalt to provide viscosity control and improve shape retention of asphalt articles at elevated temperatures. For example, U.S. Patent 3,808,164 to Gulino et al teaches the use of dozens of materials to be blended with asphalt to reinforce the asphalt material and help retain its shape.
One of the problems with commonly employed ma-terials for blending with asphalts is that those materials seeking to reduce the viscosi-ty for processing purposes leave the asphalt too soft for practical operation as a product. Also, those additives which make the asphalt harder during temper-atures normally encountered in the use of the asphalts tend to make the asphalt too viscous for acceptable processing.
This invention is directed to the solution of that problem by providing an asphalt blend which has an increased ~Z~;~)653 softening point over typically blown coating asphalts, while having an acceptably 1OW viscosity at elevated processing temperatures.
According to this invention there is provided a composition comprising a petroleum-derived asphalt and up to about 10 percent by weight of bis-stearoylamide.
Also, in accordance with this invention, there are provided compositions, including roofing shingles, comprising the asphalt and bis-stearoylamide composition.
In a preferred embodiment of the invention, the composition contains from about 2 to 6 percent by weight o~ the bis-ste'~roylamide.
The accompanying drawing is a graph of viscosity versus temperature for a typically blown asphalt and for an asphalt blended with bis-stearoylamide according to the principles of the invention.
The invention is applicable to natural and petroleum-derived asphalts including straight-run Eractionation-derived asphalts, crac~ed asphalts, asphalts derived from processing such as blown asphalts, propane deasphalting, steam distillation, chemically modified asphalts, and the like. In a preferred embodiment, the invention is applicable to asphalts for shingle production having a ring and ball softening point of about 143F.
The bis-stearoylamide can be mixed with -the asphal-t in any amount suitable to reduce the viscosity of the asphalt to that viscosity desired for the ultimate blend. Generally, the bis-stearoylamide will be introduced into the asphalt in an amount up to about 10 percent by weight and preferably in an amount within the range of from about 2 to about 6 percent by weight of the blend of the two materlals. The bis-stearoylamide can be introduced into the asphalt in any suitable manner, for example, as a solid into a solid o~ liquid, or as a liquid into a solid or liquid, the addition being made at any suitable temperature. The bis-stearoylamide can also be added in an amount sufficien-t to increase the softening point without significantly al-tering the viscosity ~ ., .
~:6(~6~3 oE the asphalt.
The bis-stearoylamide used in the invention preferably has a softeniny point greater than 260F, and has the following chemical composition:
7H35 lCI NH-CH2-CH2-NH-C-C17H35 O O
The final combination of bis-stearoylamide and asphalt can be diluted with any suitable diluent. Further, any combination of other materials such as aggregate asbestos, glass, and the like can be incorporated into the combination.
Application of the asphalt and bis-stearoylamide to the base material is made in the usual manner, with or without the addition of fillers.
It has been found that the addition of between
In one of its more specific aspects, this invention pertains to asphalts modified with synthetic waxes to form compositions particularly suitable as coatings and saturants.
It i.s well known i.n the art oE roofing shingle production, to employ aspha~t-based compositions as saturants on base materials such as felt, glass fibers, asbes-tos and the like. As extenders, it is customary to include in the coating certain filler materials which increase the quantity Of material saturatable by the asphalt, which materials act to absorb wear on the shingle. Such fillers, however, at to increase the viscosity of the asphalt making it less penetratable of the base materials and requiring that the application of the asphalt to the base materials be made at higher temperatures to compensate for the increase in viscosity of the asphalt upon addition of the filler.
It is also well known in the art tha-t various materials can be blended wi-th asphalt to lower the viscosity at processing temperatures, thereby enabling easier processing.
For example, in U.S. Patent 4,282,038, to Earing, gilsonite, a naturally occurring asphalt, is modified by the addition of a process oil to reduce the viscosity of the asphalt during processing. It is also known to add waxes to asphalt to provide viscosity control and improve shape retention of asphalt articles at elevated temperatures. For example, U.S. Patent 3,808,164 to Gulino et al teaches the use of dozens of materials to be blended with asphalt to reinforce the asphalt material and help retain its shape.
One of the problems with commonly employed ma-terials for blending with asphalts is that those materials seeking to reduce the viscosi-ty for processing purposes leave the asphalt too soft for practical operation as a product. Also, those additives which make the asphalt harder during temper-atures normally encountered in the use of the asphalts tend to make the asphalt too viscous for acceptable processing.
This invention is directed to the solution of that problem by providing an asphalt blend which has an increased ~Z~;~)653 softening point over typically blown coating asphalts, while having an acceptably 1OW viscosity at elevated processing temperatures.
According to this invention there is provided a composition comprising a petroleum-derived asphalt and up to about 10 percent by weight of bis-stearoylamide.
Also, in accordance with this invention, there are provided compositions, including roofing shingles, comprising the asphalt and bis-stearoylamide composition.
In a preferred embodiment of the invention, the composition contains from about 2 to 6 percent by weight o~ the bis-ste'~roylamide.
The accompanying drawing is a graph of viscosity versus temperature for a typically blown asphalt and for an asphalt blended with bis-stearoylamide according to the principles of the invention.
The invention is applicable to natural and petroleum-derived asphalts including straight-run Eractionation-derived asphalts, crac~ed asphalts, asphalts derived from processing such as blown asphalts, propane deasphalting, steam distillation, chemically modified asphalts, and the like. In a preferred embodiment, the invention is applicable to asphalts for shingle production having a ring and ball softening point of about 143F.
The bis-stearoylamide can be mixed with -the asphal-t in any amount suitable to reduce the viscosity of the asphalt to that viscosity desired for the ultimate blend. Generally, the bis-stearoylamide will be introduced into the asphalt in an amount up to about 10 percent by weight and preferably in an amount within the range of from about 2 to about 6 percent by weight of the blend of the two materlals. The bis-stearoylamide can be introduced into the asphalt in any suitable manner, for example, as a solid into a solid o~ liquid, or as a liquid into a solid or liquid, the addition being made at any suitable temperature. The bis-stearoylamide can also be added in an amount sufficien-t to increase the softening point without significantly al-tering the viscosity ~ ., .
~:6(~6~3 oE the asphalt.
The bis-stearoylamide used in the invention preferably has a softeniny point greater than 260F, and has the following chemical composition:
7H35 lCI NH-CH2-CH2-NH-C-C17H35 O O
The final combination of bis-stearoylamide and asphalt can be diluted with any suitable diluent. Further, any combination of other materials such as aggregate asbestos, glass, and the like can be incorporated into the combination.
Application of the asphalt and bis-stearoylamide to the base material is made in the usual manner, with or without the addition of fillers.
It has been found that the addition of between
2 and 6 percent of bis-stearoylamide to asphalt greatly improves the weatherability of asphalt shingles~ Although some slight improvement might have been expected, the improve-ment was so great that it exceeded any expectation. The term "weatherability" is a term that is well understood in the ar-t as indicating durabili-ty or resistance to weather conditions. Webster's Third New International Dictionary deines "weatherability"as the"capability of withstanding weather".
The -Eollowing Examples illustrate the invention.
EX~MPLES
RooEing shi~gles for weather -testing were prepared by coating a conventional shingle base mat with control asphalt compositions (1) and (2). Composition (1) comprised coating grade asphalt and 62~ .filler while composition t2) comprised the same coating grade asphalt with ~5% of the same filler as used in (1). Three specimen shingles were prepared using each of the asphalt coating compositions ; (1) and (2).
.
~2~ i3 Specimen shingles were prepared in the same manner using asphalt coating compositions (3) and (4). Composition
The -Eollowing Examples illustrate the invention.
EX~MPLES
RooEing shi~gles for weather -testing were prepared by coating a conventional shingle base mat with control asphalt compositions (1) and (2). Composition (1) comprised coating grade asphalt and 62~ .filler while composition t2) comprised the same coating grade asphalt with ~5% of the same filler as used in (1). Three specimen shingles were prepared using each of the asphalt coating compositions ; (1) and (2).
.
~2~ i3 Specimen shingles were prepared in the same manner using asphalt coating compositions (3) and (4). Composition
(3) comprised the coating grade a.sphalt, 3% Glyco Wax (bis-stearoylamide) and ~5~ filler while composition (4) comprised the coating grade asphalt, 3% Glyco Wax and 70% filler.
Three specimen shingles were prepared using each of compositions (3) and (4).
The specimen shingles were then subjected to a standard weathering test with the following results, the irldicated cycle ranges representing the greatest number of cycles recorded beore failure had occurred:
24 Hour Cycles 15 COating Specimen Composition 1 . 2 3 Average -1 62.5- 65.4 62.5- 65.4 62.5- 65.4 64.0 2 55.2- 58.5 51.0- 55.0 55.2- 58.5 55.6 3 109.9-112.4 89.5- 92.9 97.0-100.0 100.3 4112.4-119.5 119.5-121.5112.4-119.5 117.5 The above resul-ts show that the bis-stearoylamide modified asphalt compositions ~Nos. 3 and 4~ improve the weatherabi.lity of roofing shingles substantially by approx-imately 100% before failure when compared with the convent.ionalunmodiied standards (Nos. 1 and 2). This remarkably improved weatherability couId not have been predicted from the prior art and was unexpected.
It has been found that the composition of the invention greatly changes the viscosity/temperature curve as shown in the drawing. The solid line indicates the proper-ties of a partially blown asphalt modified with 3 percent by weight bis-stearoylamide, the blend having 70 percent filler and a softening point of 225F. The dashed line shows the properties of partially blown asphalt without -the bis-stearoylamide modifier, but having 70 percent filler and a softening point of 170F. The do-tted line indicates ~L26~6S3 the properties oE a fully blown, unmodified asphalt with 61 percent filler and a softening point oE 225F. As can be seen, the modification increa`ses the softening point in the lower temperature rarlges without significantly lowering 5 the viscosity. Preferably, in the lower temperature ranges o from about 110F to about 230F the viscosity drops from about g,000,000 poise to about 11,000 poise. Also, it can be seen from the drawing that the viscosity drops rapidly once an elevated temperature is reached. Preferably, in lO the elevated temperature range of rom about 230F to about 265F, the viscosity drops from about ll,000 poise to about 325 poise.
The composition of this invention can be used for numerous applications. For example, the composition 15 can be used to coat a fiberglass board having a density of Erom about 2 to about 12 pounds per cubic foot. Such boards are suitable for numerous proposes, including, without limitation, roof insuIation boards and basement wall insul-ation boards. Another suitable use for the composition 20 of the invention is in sacrificial electrical anodes used in cathodic protection devices.
Another improtant use for the composition of the invention is as an undersealer in a hi.ghway constructionO
A problem in the maintenance of highways is that the supporting 25 soil beneath the highway becomes eroded underneath joints or cracks in the highway. In order to put back in place support for the highway, an asphalt undersealer is pumped into a position underneath the join-t or crack.
Another important use of the composition of the 30 invention is in treating or coating the surface, joints or cracks in pavements. Pavements are broadly defined as highways, bridge decks, parking lots, driveways, runways, e-tc. The increased softening point of the composition makes the composition tougher in the coating or sur:Eacing application, 35 whi.le enabiling a lower viscosity at processing temperatures for the addition of filler materials and other modifiers.
The composition of this invention can also be used as an 126~S3 adhesive and as a dust palliative. It is also suitable for use as a watexproofing material, particularly for use on basement walls.
The material is outstandingly adapted to forming a laminate by intimately bonding it to a flexible sheet-like support, for example, a thermoplastic film such as a polyamide, polyester or polyolefin.
The asphalt of the invention can be used as a pitch substitute for such uses as pipe coatings, board saturants, and the manufacture of clay pigeons.
The composition described herein, and the products made from that compositionr result in a changing of the temperature/viscosity relationship in a way not expected by the inventor. This results in a greatly improved asphalt for numerous uses, including in particular, roofing applications.
This resuIts in a processing difference which enables the conversion of asphalts into coating grade asphalts wi-th only a minor amount of blowing and mixing, rather than the extensive amount of blowing required in a typically blown asphalt.
Three specimen shingles were prepared using each of compositions (3) and (4).
The specimen shingles were then subjected to a standard weathering test with the following results, the irldicated cycle ranges representing the greatest number of cycles recorded beore failure had occurred:
24 Hour Cycles 15 COating Specimen Composition 1 . 2 3 Average -1 62.5- 65.4 62.5- 65.4 62.5- 65.4 64.0 2 55.2- 58.5 51.0- 55.0 55.2- 58.5 55.6 3 109.9-112.4 89.5- 92.9 97.0-100.0 100.3 4112.4-119.5 119.5-121.5112.4-119.5 117.5 The above resul-ts show that the bis-stearoylamide modified asphalt compositions ~Nos. 3 and 4~ improve the weatherabi.lity of roofing shingles substantially by approx-imately 100% before failure when compared with the convent.ionalunmodiied standards (Nos. 1 and 2). This remarkably improved weatherability couId not have been predicted from the prior art and was unexpected.
It has been found that the composition of the invention greatly changes the viscosity/temperature curve as shown in the drawing. The solid line indicates the proper-ties of a partially blown asphalt modified with 3 percent by weight bis-stearoylamide, the blend having 70 percent filler and a softening point of 225F. The dashed line shows the properties of partially blown asphalt without -the bis-stearoylamide modifier, but having 70 percent filler and a softening point of 170F. The do-tted line indicates ~L26~6S3 the properties oE a fully blown, unmodified asphalt with 61 percent filler and a softening point oE 225F. As can be seen, the modification increa`ses the softening point in the lower temperature rarlges without significantly lowering 5 the viscosity. Preferably, in the lower temperature ranges o from about 110F to about 230F the viscosity drops from about g,000,000 poise to about 11,000 poise. Also, it can be seen from the drawing that the viscosity drops rapidly once an elevated temperature is reached. Preferably, in lO the elevated temperature range of rom about 230F to about 265F, the viscosity drops from about ll,000 poise to about 325 poise.
The composition of this invention can be used for numerous applications. For example, the composition 15 can be used to coat a fiberglass board having a density of Erom about 2 to about 12 pounds per cubic foot. Such boards are suitable for numerous proposes, including, without limitation, roof insuIation boards and basement wall insul-ation boards. Another suitable use for the composition 20 of the invention is in sacrificial electrical anodes used in cathodic protection devices.
Another improtant use for the composition of the invention is as an undersealer in a hi.ghway constructionO
A problem in the maintenance of highways is that the supporting 25 soil beneath the highway becomes eroded underneath joints or cracks in the highway. In order to put back in place support for the highway, an asphalt undersealer is pumped into a position underneath the join-t or crack.
Another important use of the composition of the 30 invention is in treating or coating the surface, joints or cracks in pavements. Pavements are broadly defined as highways, bridge decks, parking lots, driveways, runways, e-tc. The increased softening point of the composition makes the composition tougher in the coating or sur:Eacing application, 35 whi.le enabiling a lower viscosity at processing temperatures for the addition of filler materials and other modifiers.
The composition of this invention can also be used as an 126~S3 adhesive and as a dust palliative. It is also suitable for use as a watexproofing material, particularly for use on basement walls.
The material is outstandingly adapted to forming a laminate by intimately bonding it to a flexible sheet-like support, for example, a thermoplastic film such as a polyamide, polyester or polyolefin.
The asphalt of the invention can be used as a pitch substitute for such uses as pipe coatings, board saturants, and the manufacture of clay pigeons.
The composition described herein, and the products made from that compositionr result in a changing of the temperature/viscosity relationship in a way not expected by the inventor. This results in a greatly improved asphalt for numerous uses, including in particular, roofing applications.
This resuIts in a processing difference which enables the conversion of asphalts into coating grade asphalts wi-th only a minor amount of blowing and mixing, rather than the extensive amount of blowing required in a typically blown asphalt.
Claims (21)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A composition comprising a petroleum-derived asphalt and up to about 10 percent by weight of bis-steroyl-amide.
2. The composition of claim 1 in which said asphalt has a ring and ball softening point of about 143°F.
3. The composition of claim 1 or 2 in which the softening point of said bis-stearoylamide is greater than about 260°F.
4. The composition of claim 1 containing from about 2 to about 6 percent by weight of said bis-stearoylamide.
5. The composition of claim 4 in which the softening point is about 225°F and the viscosity drops from about 11,000 poise to about 325 poise at temperatures within the range of from about 230°F to about 265°F.
6. The composition of claim 4 in which the soften-ing point is about 225°F and the viscosity drops from about 9,000,000 poise to about 11,000 poise at temperatures within the range of from about 110°F to about 230°F.
7. A fiberglas board having a density of from about 2 to about 12 pounds per cubic foot, the board being coated on at least one surface with a composition as defined in claim 4.
8. A sacrificial electrical anode for use in cathodic protection, the anode being coated with a composition as defined in claim 4.
9. A laminate formed by bonding a composition as defined in claim 4 to a flexible sheet-like support.
10. A waterproofing membrane formed of a composition as defined in claim 4.
11. A method of maintaining the viscosity of a petroleum-derived asphalt and increasing its softening point, which comprises blending into said asphalt up to about 10 percent by weight of bis-stearoylamide effective to increase the softening point while maintaining or reducing the viscosity of the asphalt.
12. The method of claim 11 in which said asphalt has a ring and ball softening point of about 143°F.
13. The method of claim 12 in which an amount of bis-stearoylamide within the range of from about 2 to about 6 percent by weight of the blend is employed in the blend.
14. The method of claim 11, 12 or 13 in which said bis-stearoylamide is introduced as a solid into the solid or liquid asphalt.
15. The method of claim 11, 12 or 13 in which said bis-stearoylamide is introduced as a liquid into the solid or liquid asphalt.
16. The method of claim 11, 12 or 13, in which a dilutant as added to the blend of asphalt and bis-stearoylamide.
17. The method of claim 11, 12 or 13 in which a material selected from the group consisting of aggregate, asbestos and glass is added to the blend of asphalt and bis-stearoylamide.
18. A roofing product formed of a composition comprising an asphalt and bis-stearoylamide, the bis-stearoylamide improving the weatherability of the product.
19. In a roofing composition comprising asphalt, the improvement which comprises incorporating bis-stearoylamide in the composition in an amount sufficient to provide improved weatherability.
20. The composition of claim 19, containing from about 2 to about 6 percent by weight of said bis-stearoylamide.
21. A roofing product according to claim 18, which is a roofing shingle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US722,245 | 1976-09-10 | ||
| US72224585A | 1985-04-11 | 1985-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1260653A true CA1260653A (en) | 1989-09-26 |
Family
ID=24901048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000487819A Expired CA1260653A (en) | 1985-04-11 | 1985-07-30 | Modified asphalt |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1260653A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073378A1 (en) * | 1999-05-28 | 2000-12-07 | Chevron U.S.A. Inc. | Bitumen-amide compositions useful as road paving materials |
| WO2003062315A1 (en) * | 2002-01-23 | 2003-07-31 | Shell Internationale Research Maatschappij B.V. | Pigmentable binder composition |
| WO2009006241A1 (en) * | 2007-06-28 | 2009-01-08 | Owens Corning Intellectual Capital, Llc | Method of producing roofing shingle coating asphalt from non-coating grade asphalt |
| US7857904B2 (en) | 2007-06-28 | 2010-12-28 | Owens Corning Intellectual Capital, Llc | Process of producing roofing shingle coating asphalt |
| US7951240B2 (en) | 2007-06-28 | 2011-05-31 | Owens Corning Intellectual Capital, Llc | Process of producing roofing shingle coating asphalt allowing more material options |
| US8753442B2 (en) | 2007-06-28 | 2014-06-17 | Owens Corning Intellectual Capital, Llc | Roofing coating asphalt composition |
| WO2020039138A1 (en) * | 2018-08-22 | 2020-02-27 | Total Marketing Services | Thermoreversible bituminous composition |
| WO2020039140A1 (en) * | 2018-08-22 | 2020-02-27 | Total Marketing Services | Thermoreversible bituminous composition |
| WO2023110761A1 (en) | 2021-12-17 | 2023-06-22 | Totalenergies Onetech | Use of bisamide compounds to improve the ageing resistance of bitumen |
| RU2799545C2 (en) * | 2018-08-22 | 2023-07-06 | Тоталь Маркетин Сервис | Heat-reversible bitumen composition |
-
1985
- 1985-07-30 CA CA000487819A patent/CA1260653A/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073378A1 (en) * | 1999-05-28 | 2000-12-07 | Chevron U.S.A. Inc. | Bitumen-amide compositions useful as road paving materials |
| WO2003062315A1 (en) * | 2002-01-23 | 2003-07-31 | Shell Internationale Research Maatschappij B.V. | Pigmentable binder composition |
| US8753442B2 (en) | 2007-06-28 | 2014-06-17 | Owens Corning Intellectual Capital, Llc | Roofing coating asphalt composition |
| US7857904B2 (en) | 2007-06-28 | 2010-12-28 | Owens Corning Intellectual Capital, Llc | Process of producing roofing shingle coating asphalt |
| US7951239B2 (en) | 2007-06-28 | 2011-05-31 | Owens Corning Intellectual Capital, Llc | Method of producing roofing shingle coating asphalt from non-coating grade asphalt |
| US7951240B2 (en) | 2007-06-28 | 2011-05-31 | Owens Corning Intellectual Capital, Llc | Process of producing roofing shingle coating asphalt allowing more material options |
| WO2009006241A1 (en) * | 2007-06-28 | 2009-01-08 | Owens Corning Intellectual Capital, Llc | Method of producing roofing shingle coating asphalt from non-coating grade asphalt |
| WO2020039138A1 (en) * | 2018-08-22 | 2020-02-27 | Total Marketing Services | Thermoreversible bituminous composition |
| WO2020039140A1 (en) * | 2018-08-22 | 2020-02-27 | Total Marketing Services | Thermoreversible bituminous composition |
| FR3085168A1 (en) * | 2018-08-22 | 2020-02-28 | Total Marketing Services | HEAT-REVERSIBLE BITUMINOUS COMPOSITION |
| US11639440B2 (en) | 2018-08-22 | 2023-05-02 | Total Marketing Services | Thermoreversible bituminous composition |
| RU2799545C2 (en) * | 2018-08-22 | 2023-07-06 | Тоталь Маркетин Сервис | Heat-reversible bitumen composition |
| WO2023110761A1 (en) | 2021-12-17 | 2023-06-22 | Totalenergies Onetech | Use of bisamide compounds to improve the ageing resistance of bitumen |
| FR3130806A1 (en) * | 2021-12-17 | 2023-06-23 | Totalenergies Marketing Services | Use of bisamide compounds to improve the aging resistance of bitumen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |