EP4010419A1 - Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphalt - Google Patents
Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphaltInfo
- Publication number
- EP4010419A1 EP4010419A1 EP20751146.0A EP20751146A EP4010419A1 EP 4010419 A1 EP4010419 A1 EP 4010419A1 EP 20751146 A EP20751146 A EP 20751146A EP 4010419 A1 EP4010419 A1 EP 4010419A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- styrene
- modified bitumen
- butadiene
- bitumen
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/30—Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/30—Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
- C08L2555/34—Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
- C08L2555/52—Aggregate, e.g. crushed stone, sand, gravel or cement
Definitions
- the present invention relates to polymer-modified bitumen, methods of production and its use for asphalt.
- Polymers as an additive for modifying bitumen have received particular attention in the last few decades.
- Polymers such as copolymers of the styrene-butadiene (SBR) or styrene-butadiene-styrene (“SBS”) type, improve the constancy of the viscoelastic properties of the modified bitumen with temperature.
- the aim is to increase the stability of the asphalt surface containing the modified bitumen against deformation caused by heavy traffic during the summer months.
- Di-tert-dodecyl pentasulphide and dinonyl pentasulphide are preferred.
- these have the disadvantage that, due to less effective crosslinking and thus less pronounced elastic properties, they withstand the load conditions on the road less well than the alkyl polysulfides according to the invention.
- the object of the present invention was to produce polymer-modified bitumen that compared with prior art has improved elastic recovery and low sensitivity to deforming forces at low sulfur content.
- the object can be achieved in that the copolymers of the styrene-butadiene (SBR) or styrene-butadiene-styrene (SBS) type are vulcanized in the bitumen with C 7 -C 8 dialkyl polysulfides.
- SBR styrene-butadiene
- SBS styrene-butadiene-styrene
- the present invention provides polymer-modified bitumen obtainable by adding styrene-butadiene copolymers, optionally dissolved in oil, to the bitumen at temperatures of at least 150 ° C. and then adding the dialkyl polysulphides of the formula (I)
- SBR styrene-butadiene copolymers
- the styrene-butadiene copolymers are particularly preferably composed of 40-99% by weight of 1,3-butadiene and 1-60% by weight of styrene.
- Styrene-butadiene-styrene (SBS) block copolymers are preferred as SBR copolymers.
- dialkyl polysulfides of the formula (I) used in accordance with the invention serve as a sulfur source for the vulcanization of styrene-butadiene copolymers or styrene-butadiene-styrene (SBS) block copolymers.
- dialkyl polysulfides of the formula (I) used are preferably dialkyl polysulfides in which R 1 and R 2 are identical or different and represent a linear or branched C 8 -alkyl radical and x represents the numbers 3 to 8.
- dialkyl polysulfides can be used either individually or as a mixture in any desired mixture with one another in the process according to the invention.
- dioctyl pentasulfide and / or dioctyl tetrasulfide are preferred as dialkyl polysulfide of the formula (I).
- the amount of C 7 -C 8 dialkyl polysulfide is preferably 0.1 to 1% by weight, particularly preferably 0.2 to 0.8% by weight, based on the mass of the copolymer-bitumen mixture.
- Bitumen refers to a mixture of various organic substances that occurs both naturally and is obtained from petroleum by distillation. Due to its biological origin, bitumen consists mainly of carbon and hydrogen. It is a low-volatility, dark-colored multi-substance mixture of organic substances, the viscoelastic behavior of which changes with temperature. As bitumen in the context of the invention, all commercially available bitumen types, such as 50/70 or 70/100, can be used. This preferably includes road construction bitumen according to DIN EN 12591.
- the styrene-butadiene copolymers are used in solution in at least one mineral oil before they are mixed with the bitumen.
- Naphthenic oils such as the naphthenic “Nynas T 22” or paraffin-based raffinates, which are also known under the term RAE (Residual Aromatic Extract) according to the EU Substance Directive, such as the process and "Shell Flevex 595" softening oil.
- the dialkyl polysulphides of the formula (I) are preferably metered in.
- the addition is preferably carried out under mechanical stress, by means of mixing units, such as, preferably internal mixer, high-pressure homogenizers, such as in particular high shear mixing equipment, such as Ultra-Turrax ®.
- the use of internal mixers is particularly preferred, the type of internal mixer not being subject to any particular restriction.
- high shear mixer eg a Ultra-Turrax ®, particularly preferred or a anchor with at least two wings.
- an internal mixer is used for mechanical loading, internal mixers with intermeshing or tangential rotors are preferred.
- An internal mixer with intermeshing rotors is particularly preferred because more shear energy can be introduced in this way.
- the stirring speed can be set as a function of the viscosity of the polymer-modified bitumen (PmB); in the case of an anchor stirrer with at least 2 blades, the stirring speed is preferably 150 to 500 rpm, particularly preferably 180-250 rpm.
- the temperature during mixing is preferably 150 to 250 ° C, particularly preferably 160 to 180 ° C.
- the mixing time under mechanical stress for mixing the styrene-butadiene copolymers with the bitumen is preferably 60 to 480 minutes, particularly preferably 60 to 240 minutes, and for mixing the dialkypolysulfide of the formula (I) into the styrene-butadiene copolymer bitumen -Mixture preferably 1 to 60 minutes, particularly preferably 5 to 10 minutes.
- the end of the vulcanization can preferably be recognized by the fact that there is no further increase in viscosity.
- the weight ratio of oil to styrene-butadiene copolymer is 9: 1 to 1: 1, preferably 7: 1 to 3: 1.
- the invention also relates to the process for producing the polymer-modified bitumen according to the invention, according to which styrene-butadiene copolymers, optionally dissolved in oil, are added to the bitumen at temperatures of at least 150 ° C.
- the polymer-modified bitumen contains further additives, such as metal compounds / salts, in particular organic zinc compounds / salts, inter alia as sulfide scavengers and thus as odor reducers.
- additives such as metal compounds / salts, in particular organic zinc compounds / salts, inter alia as sulfide scavengers and thus as odor reducers.
- the amount of additives is preferably 0.1 to 1% by weight.
- the polymer-modified bitumen is then mixed with rock.
- Rock in the sense of the invention is preferably natural aggregate, preferably in accordance with DIN EN 13043, which has preferably been subjected to mechanical processing, such as breaking and sieving.
- Asphalt surface course mix consists of aggregates up to a maximum grain size of 16 mm.
- the requirements for aggregates are defined, among other things, in DIN 18196 soil classification for structural purposes and the technical delivery conditions for aggregates in road construction, TL Gestein-StB, edition 2004 (p. 11).
- the rock is preferably either in unbroken form (as round grain), in particular as gravel, sand, crushed stone and chippings; or in broken form.
- the amount of rock is preferably up to 95% by weight, preferably 90 to 95% by weight, based on the total amount of polymer-modified bitumen.
- the rock is preferably mixed with the polymer-modified bitumen under mechanical stress, preferably by means of agitators.
- Another object of the invention is to provide a first object of the invention.
- the present invention thus also relates to asphalt containing the polymer-modified bitumen according to the invention.
- asphalt is a natural or technically produced mixture containing polymer-modified bitumen and rock (aggregates).
- This is preferably used in road construction for pavement pavements, in building construction for floor coverings, in hydraulic engineering and in landfill construction for sealing.
- the mixing ratio is preferably 90-95% by weight rock / aggregate and approx. 5-10% by weight bitumen. However, this ratio can be changed up or down.
- the amount added (so-called binder content) and the hardness (i.e. the type of binder) of the bitumen change the material behavior significantly.
- bitumen which preferably makes up 4-7% of the road surface
- bitumen roofing membranes for sealing roofs
- road construction protecting steel against corrosion and in road construction as a binder for the aggregates in asphalt, preferably as a road surface.
- SBS styrene-butadiene-styrene block copolymer
- SB styrene-butadiene diblock with a polystyrene content: from 29-33%.
- - Nynas T 400 naphthenic oil from Nynas AB.
- Example 1 (according to the invention):
- a solution of 12 g of the polymer (SBS, Kraton® 1101) in 32 g of the Nynas T 400 oil at 170 ° C. was first prepared. This solution was added to 366 g bitumen, so that a solution of 3% by weight polymer in a bitumen-oil mixture resulted. Subsequently, as shown in Table 1, 0.25% by weight of di-octyl pentasulphide with 40% sulfur (this corresponds to a sulfur content in the reaction batch 0.1% by weight, based on the reaction mixture) was added and the crosslinking was carried out by heating to 170 ° C. for 2 hours
- the dynamic shear rheometer has proven itself to determine the viscoelastic properties, such as the elastic recovery of modified bitumens.
- DSR dynamic shear rheometer
- MSCR test Multiple Stress Creep and Recovery Test
- a DSR test specimen was cast from the materials obtained in Examples 1V and 1E and the MSCR test was carried out at 60 ° C. at 3 load levels.
- the recovery in% (R value) was determined in 10 load cycles with a load phase with constant shear stress of 1 second and a subsequent relief phase of 9 seconds. certainly.
- This test was carried out at three load levels of 0.1 kPa, 1.6 kPa and 3.2 kPa. The deformations during the force-controlled cycles were divided into three deformation variables:
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19191079.3A EP3772525B1 (de) | 2019-08-09 | 2019-08-09 | Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphalt |
| PCT/EP2020/072037 WO2021028290A1 (de) | 2019-08-09 | 2020-08-05 | Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphalt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4010419A1 true EP4010419A1 (de) | 2022-06-15 |
Family
ID=67587666
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19191079.3A Active EP3772525B1 (de) | 2019-08-09 | 2019-08-09 | Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphalt |
| EP20751146.0A Withdrawn EP4010419A1 (de) | 2019-08-09 | 2020-08-05 | Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphalt |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19191079.3A Active EP3772525B1 (de) | 2019-08-09 | 2019-08-09 | Polymermodifiziertes bitumen, verfahren zur herstellung und dessen verwendung für asphalt |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12486402B2 (de) |
| EP (2) | EP3772525B1 (de) |
| CN (1) | CN114245817B (de) |
| ES (1) | ES2970068T3 (de) |
| HU (1) | HUE065254T2 (de) |
| PL (1) | PL3772525T3 (de) |
| WO (1) | WO2021028290A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4464740A1 (de) | 2023-05-15 | 2024-11-20 | LANXESS Deutschland GmbH | Emissions- und geruchsminderung von altgummi mittels ppa bei der verwendung von gummimodifiziertem bitumen und asphalt |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2528439B1 (fr) | 1982-06-10 | 1985-11-22 | Elf France | Procede de preparation de compositions bitume-polymere, application de ces compositions a la realisation de revetements, et solution mere de polymere utilisable pour l'obtention desdites compositions |
| DE19838770C2 (de) * | 1997-08-29 | 2002-10-24 | Schuemann Sasol Gmbh & Co Kg | Bitumen, Dachpappe mit Bitumen sowie Verwendung von FT-Paraffin |
| US20060116449A1 (en) | 2004-12-01 | 2006-06-01 | Fina Technology, Inc. | Bitumen/rubber compositions crosslinked with polythiomorpholines, polysulfides and/or mercaptobenzimidazole |
| FR2901279B1 (fr) * | 2006-05-19 | 2008-08-01 | Eurovia Sa | Liant thermofusible a base d'asphalte ou de bitume a temperature de fabrication abaissee |
| US8198350B2 (en) * | 2010-02-11 | 2012-06-12 | Icl Performance Products, Lp | Polymer-modified asphalt with a crosslinking agent and methods of preparing |
| EP3133114A1 (de) * | 2015-08-21 | 2017-02-22 | Rhein Chemie Rheinau GmbH | Verbessertes verfahren von gummimodifiziertem bitumen aus vulkanisiertem gummi |
| CN106810883B (zh) * | 2015-12-02 | 2020-02-07 | 中国石油化工股份有限公司 | 一种沥青组合物及其制备方法 |
-
2019
- 2019-08-09 HU HUE19191079A patent/HUE065254T2/hu unknown
- 2019-08-09 PL PL19191079.3T patent/PL3772525T3/pl unknown
- 2019-08-09 ES ES19191079T patent/ES2970068T3/es active Active
- 2019-08-09 EP EP19191079.3A patent/EP3772525B1/de active Active
-
2020
- 2020-08-05 CN CN202080056264.2A patent/CN114245817B/zh active Active
- 2020-08-05 EP EP20751146.0A patent/EP4010419A1/de not_active Withdrawn
- 2020-08-05 US US17/633,222 patent/US12486402B2/en active Active
- 2020-08-05 WO PCT/EP2020/072037 patent/WO2021028290A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN114245817A (zh) | 2022-03-25 |
| US20220306865A1 (en) | 2022-09-29 |
| ES2970068T3 (es) | 2024-05-24 |
| PL3772525T3 (pl) | 2024-04-22 |
| CN114245817B (zh) | 2023-06-20 |
| EP3772525A1 (de) | 2021-02-10 |
| EP3772525B1 (de) | 2023-11-22 |
| WO2021028290A1 (de) | 2021-02-18 |
| US12486402B2 (en) | 2025-12-02 |
| HUE065254T2 (hu) | 2024-05-28 |
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