EP3788108A1 - Composition bitume/polymere presentant des proprietes mecaniques ameliorees - Google Patents
Composition bitume/polymere presentant des proprietes mecaniques amelioreesInfo
- Publication number
- EP3788108A1 EP3788108A1 EP19728483.9A EP19728483A EP3788108A1 EP 3788108 A1 EP3788108 A1 EP 3788108A1 EP 19728483 A EP19728483 A EP 19728483A EP 3788108 A1 EP3788108 A1 EP 3788108A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bitumen
- weight
- monomer
- polymer
- ethylene
- 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.)
- Pending
Links
Classifications
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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
- 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
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/80—Macromolecular constituents
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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
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/80—Macromolecular constituents
- C08L2555/84—Polymers comprising styrene, e.g., polystyrene, styrene-diene copolymers or styrene-butadiene-styrene copolymers
Definitions
- the present invention belongs to the field of bitumens. More specifically, the invention relates to thermally crosslinkable bitumen / polymer compositions comprising an olefin polymer-type adjuvant, which compositions have improved mechanical properties.
- the invention also relates to the use of these compositions for road applications, in particular for the preparation of bituminous mixes such as hot mixes, warm mixes, cold mixes such as for example cold-poured mixes or even gravels.
- bituminous mixes such as hot mixes, warm mixes, cold mixes such as for example cold-poured mixes or even gravels.
- emulsions for the manufacture of surface coatings, for example emulsions or fluxed bitumens; but also for industrial applications, for example in the manufacture of interior and exterior coatings.
- bituminous compositions having improved properties and their method of preparation have been widely described in the literature.
- random or block copolymers of styrene and of a conjugated diene and, in particular, styrene and butadiene or styrene and isoprene are known to be particularly effective because they mix very easily in the bitumens and give them excellent mechanical properties and in particular very good elastic properties.
- bitumen / polymer compositions are used for the preparation of binders for various surface coatings and, in particular, as road surface coatings, provided that these compositions have in combination a number of mechanical properties. Optimized mechanical characteristics such as elastic properties are particularly crucial for applications in road surfaces.
- the application FR 3,050,210 describes a process for preparing a bitumen / polymer composition having improved ductility before and after aging, method comprising contacting a bitumen base, an SBS elastomer and a sulfur crosslinking agent.
- bitumen / polymer compositions containing a bitumen or a mixture of bitumens, from 0.3% to 20%, by weight relative to the weight of bitumen, of at least one primary polymer chosen from certain elastomers and plastomers and from 0.01% to 12% by weight of at least one olefinic polymer-type adjuvant carrying epoxy or COOH groups.
- the polymers used in this document are different from those of the invention.
- the role of the adjuvant is to avoid demixing between the bituminous phase and the polymer phase, which improves the storage stability of the composition.
- a second bitumen base having an intrinsic stability S of less than or equal to 2.50 and / or a peptization rate Sa of less than or equal to 0.60,
- compositions are sulfur crosslinked and employ an SBS block terpolymer.
- WO2008 / 137394 discloses a process for preparing a polymer modified bituminous binder composition in the absence of crosslinking agents by heating bitumen at a temperature of 160 ° C to 221 ° C, addition of a block copolymer composition and stirring to form a homogeneous mixture.
- the block copolymer compositions used comprise one or more block copolymers having at least one monovinylaromatic block, at least one polybutadiene block having a vinyl content of less than 15 mole percent and at least one polybutadiene block having a content of vinyl of more than 25 percent by mole. It is taught that the bitumen / polymer compositions thus formulated have improved mechanical properties, such as ductility, and good storage stability.
- WO2017 / 046523 discloses thermally crosslinkable bitumen / polymer compositions comprising an S-B1-B2 type elastomer and an olefinic polymer type adjuvant, S representing a styrenic polymer block or other vinylaromatic, B1 and B2 representing polybutadiene polymer blocks. These compositions have good mechanical properties and satisfactory storage stability.
- thermally crosslinkable bitumen / polymer compositions having even better mechanical properties, especially in terms of tensile strength while maintaining satisfactory storage stability.
- the object of the invention is to develop a thermally crosslinkable bitumen additive composition which is stable in storage and which has improved elastic properties.
- the invention relates to a bitumen / polymer composition
- a bitumen / polymer composition comprising:
- At least one elastomer At least one elastomer
- At least one olefinic polymer adjuvant functionalized with at least one epoxide group At least one olefinic polymer adjuvant functionalized with at least one epoxide group
- the elastomer is a thermally crosslinkable block copolymer of the formula SBS, wherein each S independently represents a monovinyl aromatic hydrocarbon monomer block, B represents a butadiene monomer block, wherein the S blocks represent, together, at least 15 mol% of the total number of moles of the thermally crosslinkable block copolymer, said thermally crosslinkable block copolymer has a weight average molecular weight of from 40,000 to 500,000 gm 1 and has a higher vinyl group content or 20 mol%, based on the total number of moles of the thermally crosslinkable block copolymer.
- SBS thermally crosslinkable block copolymer of the formula SBS, wherein each S independently represents a monovinyl aromatic hydrocarbon monomer block, B represents a butadiene monomer block, wherein the S blocks represent, together, at least 15 mol% of the total number of moles of the thermally crosslinkable block copolymer, said thermally crosslinkable block copoly
- the subject of the invention is also a process for preparing a bitumen / thermo-polymerized polymer composition from a bitumen / polymer composition as defined above, and below for the preferred embodiments, characterized in that contact is made, operating at temperatures ranging from 100 ° C to 200 ° C:
- the subject of the invention is also a bitumen / thermo-cured polymer composition obtained by the process defined above and in detail below.
- the reaction is carried out at a temperature ranging from 160 ° C. to 195 ° C., preferably from 160 ° to 180 ° C.
- each S represents a polystyrene block.
- the thermally crosslinkable block copolymer has a vinyl group content greater than or equal to 25 mol%, relative to the total number of moles of the thermally crosslinkable block copolymer, preferably greater than or equal to 28 mol%. .
- the blocks S of the thermally crosslinkable block copolymer together represent from 15% to 50% by moles of the total number of moles of the thermally crosslinkable block copolymer, preferably from 16% to 30% by moles, more preferably from 16% to 25% by moles, and even more preferably from 16% to 20% by moles.
- the composition comprises from 0.5% to 20% by weight of elastomer relative to the total mass of the composition, preferably from 0.5 to 15% by weight.
- the composition comprises from 0.05% to 2.5% by weight of olefinic polymer adjuvant functionalized with at least one epoxide group, with respect to the total mass of the composition, preferably from 0, 15 to 2% by weight.
- the olefinic polymer adjuvant functionalized with at least one epoxide group is chosen from the group consisting of:
- copolymers preferably random copolymers of ethylene and a monomer selected from glycidyl acrylate and glycidyl methacrylate, comprising from 50% to 99.7% by weight of ethylene;
- terpolymers preferably random copolymers of ethylene, of a monomer A chosen from vinyl acetate and C 1 -C 6 alkyl acrylates or methacrylates and a monomer B chosen from acrylate of glycidyl and glycidyl methacrylate, comprising from 0.5% to 40% by weight of units derived from monomer A and from 0.5% to 15% by weight of units derived from monomer B, the remainder being formed from units from ethylene; and
- the olefinic polymer adjuvant functionalized with at least one epoxy group is chosen from the terpolymers, preferably random ethylene, of a monomer A chosen from vinyl acetate and acrylates or methacrylates. alkyl to C 6 and a monomer B selected from glycidyl acrylate and glycidyl methacrylate, comprising 0.5% to 40% by weight of units derived from monomer a and from 0.5 % to 15% by weight of units derived from monomer B, the remainder being formed from units derived from ethylene.
- the polymeric adjuvant olefinic functionalized with at least one epoxide group is selected from the random terpolymers of ethylene, of a monomer selected from alkyl acrylates or methacrylates to C 6 and a monomer B selected from glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by weight of units derived from monomer A and from 0.5% to 15% by weight of units derived from monomer B, the remainder being formed from units derived from ethylene.
- the polymeric adjuvant olefinic functionalized with at least one epoxide group is selected from the random terpolymers of ethylene, of a monomer selected from alkyl acrylates or methacrylates to C 3 and a monomer B selected from glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by weight of units derived from monomer A and from 0.5% to 15% by weight of units from the monomer B, the rest being formed from units derived from ethylene.
- the olefinic polymer adjuvant functionalized with at least one epoxide group is chosen from the random terpolymers of ethylene, of a monomer A chosen from ethyl acrylate and ethyl methacrylate. and a monomer B selected from glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by weight of units derived from monomer A and from 0.5% to 15% by weight of units from the monomer B, the rest being formed from units derived from ethylene.
- the invention also relates to an asphalt characterized in that it comprises at least one bitumen / polymer thermoregulated composition as defined above and in detail below, and mineral and / or synthetic fillers.
- the invention also relates to an asphalt characterized in that it consists essentially of at least one bitumen / polymer thermoregulated composition as defined above and in detail below, and mineral and / or synthetic fillers.
- the invention also relates to a bituminous mix characterized in that it comprises at least one bitumen / thermo-crosslinked polymer composition as defined above and in detail below, aggregates, and optionally mineral and / or synthetic fillers.
- the invention also relates to a bituminous mix characterized in that it consists essentially of at least one bitumen / thermally-cured polymer composition as defined above and in detail below, aggregates, and optionally mineral fillers and / or synthetic.
- the invention also relates to the use of at least one bitumen / polymer composition or at least one bitumen / thermo-polymer composition as defined above and in detail below, to prepare a surface coating, a mix when warm, a warm mix, a cold mix, a cold mix or a serious emulsion, said bitumen / polymer composition or bitumen / thermo-polymer composition being associated with aggregates and / or recycling costs.
- the invention also relates to the use of at least one bitumen / polymer composition or at least one bitumen / thermo-polymer composition as defined above and in detail below, to prepare a sealing coating, a membrane or an impregnation layer.
- compositions of the invention have many advantages: they have improved elastic properties, in particular a better cohesion which is reflected in particular by higher values of elongation at break and maximum strain stress as well as by values higher energy at 400% elongation and total energy.
- the compositions according to the invention have an elongation at break at 5 ° C., measured according to the EN 13587 standard, greater than or equal to 500%, even greater than or equal to 600% and an energy at 400% elongation. greater than 20 J / cm 2 , preferably greater than 23 J / cm 2 . They also have a satisfactory stability in hot storage, in particular a storage stability at 180 ° C. of greater than or equal to 3 days, in particular a storage stability at 180 ° C.
- the Applicant has discovered that the use of a specific elastomer in combination with a particular polymer adjuvant for the preparation of the bitumen / polymer compositions makes it possible to improve, surprisingly, the mechanical properties, in particular the elastic properties, in particular the elongation at the rupture of this bitumen / polymer composition while allowing to obtain compositions which are storage stable. This observation is not limited to a particular class of bitumen.
- bitumen / polymer composition of the invention has the advantage of being economical with respect to a bitumen / polymer composition based on the same block copolymers SBS and without adjuvant, in particular without olefinic polymer adjuvant functionalized with at least one an epoxide group.
- the addition of the olefinic polymer adjuvant functionalized with at least one epoxide group, in a small quantity makes it possible to significantly reduce the quantity of block copolymer used, with equivalent or even higher mechanical properties, and makes it possible to obtain a very satisfactory storage stability.
- bitumen / polymer composition and “bitumen / polymer binder” represent the same type of composition and are used interchangeably.
- bitumen composition / thermally-cured polymer refers to the composition resulting from the thermal crosslinking treatment of the mixture comprising at least the bitumen and the polymers.
- the invention relates to bitumens. These can be formed by one or more bitumen bases.
- bitumen any bituminous compositions consisting of one or more bitumen bases and possibly comprising one or more chemical additives, said compositions being intended for a road application or an industrial application.
- bitumen bases that may be used according to the invention, mention may first be made of bitumens of natural origin, those contained in deposits of natural bitumen, natural asphalt or bituminous sands and bitumens originating from the refining of crude oil. .
- the bitumen bases according to the invention are advantageously chosen from bitumen bases originating from the refining of crude oil.
- the bitumen bases may be chosen from bitumen bases or bitumen base mixtures derived from the refining of crude oil, in particular bitumen bases containing asphaltenes or pitches.
- the bitumen bases can be obtained by conventional processes for the manufacture of bitumen bases in a refinery, in particular by direct distillation and / or vacuum distillation of the oil.
- bitumen bases may optionally be visbroken and / or deasphalted and / or rectified in air.
- Vacuum distillation of atmospheric residues from atmospheric distillation of crude oil is common. This manufacturing process therefore corresponds to the succession of an atmospheric distillation and a distillation under vacuum, the feed supplying the vacuum distillation corresponding to the atmospheric residues.
- These vacuum residues from the vacuum distillation tower can also be used as bitumens. It is also common to inject air into a charge usually composed of distillates and heavy products from the vacuum distillation of atmospheric residues from the distillation of petroleum. This method provides a base blown, or semi-blown or oxidized or rectified in air or rectified partially in air.
- the various bitumen bases obtained by the refining processes can be combined with each other to obtain the best technical compromise.
- the bitumen base can also be a bitumen base for recycling.
- the bitumen bases may be bitumen bases of hard grade or soft grade.
- production temperatures of between 100.degree. C. and 200.degree. C., preferably between 140.degree. C. and 200.degree. at least 10 minutes, preferably between 30 minutes and 10 hours, more preferably between 1 hour and 6 hours.
- the term "manufacturing temperature” means the heating temperature of the bitumen base (s) before mixing as well as the mixing temperature. The temperature and the duration of the heating vary according to the quantity of bitumen used and are defined by the standard NF EN 12594.
- the blown bitumens can be manufactured in a blowing unit, by passing a stream of air and / or oxygen through a starting bituminous base.
- This operation can be carried out in the presence of an oxidation catalyst, for example phosphoric acid.
- the blowing is carried out at high temperatures, of the order of 200 to 300 ° C, for relatively long periods of time typically between 30 minutes and 2 hours, continuously or in batches. The duration and the blowing temperature are adjusted according to the properties targeted for the blown bitumen and according to the quality of the starting bitumen.
- Bitumen can also be a recycling bitumen.
- the bitumens may be hard grade or soft grade bitumens.
- the bitumens which can be used according to the invention have a penetrability, measured at 25 ° C. according to the EN 1426 standard, of from 5 to 330 1/10 mm, preferably from 10 to 220 1/10 mm, more preferably from 10 to 120 1 / 10 mm.
- the so-called “needle penetration” measurement is carried out by means of a standardized test EN 1426 at 25 ° C. (P 25 ). This characteristic of penetrability is expressed in tenths of a millimeter (dmm or 1/10 mm).
- the needle penetration, measured at 25 ° C, according to the standardized test NE EN 1426, represents the measurement of the penetration into a sample of bitumen, after a time of 5 seconds, of a needle whose weight with its support is 100 g.
- the NF EN 1426 standard replaces the homologated NF T 66-004 standard of December 1986 with effect from December 20, 1999 (decision of the Chief Executive Officer of AFNOR dated November 20, 1999).
- the composition according to the invention comprises from 70 to 99.5% by weight of bitumen, preferably from 75 to 99% by weight, even more preferably from 80% to 98% by weight, based on the total weight of the bitumen / polymer composition.
- the olefinic polymer adjuvant functionalized with at least one epoxide group is preferably selected from the group consisting of (a) ethylene / glycidyl (meth) acrylate copolymers; (b) ethylene / monomer A / monomer B terpolymers and (c) mixtures of these copolymers.
- the ethylene / glycidyl (meth) acrylate copolymers are advantageously chosen from copolymers, preferably random copolymers, of ethylene and of a monomer chosen from glycidyl acrylate and glycidyl methacrylate, comprising from 50 % to 99.7% by weight, preferably from 60% to 95% by weight, more preferably 60% to 90% by weight of ethylene.
- the terpolymers are advantageously chosen from the terpolymers, preferably random, of ethylene, a monomer A and a monomer B.
- the monomer A is chosen from vinyl acetate and C 1 to C 6 alkyl acrylates or methacrylates, preferably chosen from C 1 to C 6 alkyl acrylates or methacrylates, even more preferentially from C 1 to C 6 . C 3 .
- the monomer A is chosen from ethyl acrylate and ethyl methacrylate.
- the monomer A is ethyl acrylate.
- Monomer B is selected from glycidyl acrylate and glycidyl methacrylate.
- the monomer B is glycidyl methacrylate.
- the ethylene / monomer A / monomer B terpolymers comprise from 0.5% to 40% by weight, preferably from 5% to 35% by weight, more preferably from 10% to 30% by weight of units derived from monomer A and from 0% by weight. From 5% to 15% by weight, preferably from 2.5% to 15% by weight of units derived from monomer B, the remainder being formed from units derived from ethylene; (c)
- the olefinic polymer adjuvant functionalized with at least one epoxide group may be a mixture of two or more copolymers selected from categories (a) and (b).
- the olefinic polymer adjuvant functionalized with at least one epoxide group is preferably chosen from the terpolymers (b) ethylene / monomer A / monomer B described above and from the mixtures (c) comprising them.
- the olefinic polymer adjuvant functionalized with at least one epoxide group is advantageously chosen from the terpolymers (b) ethylene / monomer A / monomer B described above and from the mixtures (c) in which the terpolymers (b) represent at least less than 50% by weight relative to the total mass of the mixture, preferably at least 75% by weight, more preferably at least 90% by weight.
- the polymer adjuvant olefinic functionalized with at least one epoxide group is selected from the random terpolymers of ethylene, of a monomer selected from alkyl acrylates or methacrylates to C 6 and a monomer B selected among glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by weight, preferably from 5% to 35% by weight, more preferably from 10% to 30% by weight of units derived from monomer A and from 0.5% to 15% by weight, preferably from 2.5% to 15% by weight of units derived from monomer B, the remainder being formed from units derived from ethylene.
- the average molecular weight (Mn) of the polymeric additive olefinic functionalized with at least one epoxide group, determined by gel permeation chromatography with a polystyrene standard is from 5 000 to 50 000 g.mof 1 more preferably from 10 000 to 40 000 g.mof 1 , and still more preferably from 25 000 to 40 000 g.mof 1 .
- the weight average molecular weight (Mw) of the polymer adjuvant olefinic functionalized with at least one epoxide group is from 10 000 to 1 250 000 g.mof more preferably from 50 000 to 200 000 g.mof 1 , and even more preferably from 10 000 to 150 000 g.mof 1 .
- the average molecular weight (Mn) of the polymeric additive olefinic functionalized with at least one epoxide group, determined by gel permeation triple detection is greater than or equal to 20 000 g mol -1, preferably greater than or equal to 30 000 g.mol 1 , even more preferably greater than or equal to 40 000 g.mof 1 , and preferably greater than or equal to 45 000 g.mof 1 .
- the number-average molecular weight (Mn) of the olefinic polymer adjuvant functionalized with at least one epoxide group ranges from 20,000 to 200,000 gmof 1 , preferably from 30,000 to 180,000 gmof 1 , still more preferably from 40,000 to 150,000 gmol 1 , and advantageously from 45,000 to 120,000 gmof 1 .
- the weight average molecular weight (Mw) of the olefinic polymer adjuvant functionalized with at least one epoxide group, determined by triple detection gel permeation chromatography is greater than or equal to 60,000 g.mof 1 , preferably greater than or equal to 65 000 g.mol 1 , even more preferably greater than or equal to 70 000 g.mof 1 , and preferably greater than or equal to 75 000 g.mof 1 .
- the weight average molecular weight (Mw) of the olefinic polymer adjuvant functionalized with at least one epoxide group ranges from 60,000 to 200,000 gmof 1 , preferably from 65,000 to 190,000 gmol 1 , more preferably from 70,000 to 180,000 gmol 1 , and advantageously from 75,000 to 170,000 gmof 1 .
- the polydispersity index of the olefinic polymer adjuvant functionalized with at least one glycidyl group, determined by triple detection gel permeation chromatography is less than or equal to 3, preferably less than or equal to 2.5, more preferably less than or equal to 2.0, and advantageously less than or equal to 1.8.
- the polydispersity index of the olefinic polymer adjuvant functionalized with at least one glycidyl group, determined by triple detection gel permeation chromatography is from 0.5 to 3.0, preferably from 0.8 to 2.5, more preferably from 1.0 to 2.0, and advantageously from 1.2 to 1, 8.
- the term "monomeric unit" means the largest constituent unit generated by the (co) polymerization of a single molecule of said monomer.
- the olefinic polymer adjuvant functionalized with at least one glycidyl group comprises, on average, at least 500 ethylene units per macromolecule, preferably at least 800 ethylene units, more preferably at least 1000 ethylene units, even more preferably at least 1200 units. ethylene units, and preferably at least 1250 ethylene units.
- the olefinic polymer adjuvant functionalized with at least one glycidyl group comprises, on average, from 500 to 10,000 ethylene units per macromolecule, preferably from 800 to 5,000 ethylene units, more preferably from 1,000 to 4,000 ethylene units. still more preferably from 1200 to 3500 ethylene units, and preferably from 1250 to 3400 ethylene units.
- the olefinic polymer adjuvant functionalized with at least one glycidyl group comprises, on average, at least 30 alkyl (meth) acrylate units per macromolecule, preferably at least 50 alkyl (meth) acrylate units, more preferably at least at least 70 alkyl (meth) acrylate units, still more preferably at least 90 alkyl (meth) acrylate units, and preferably at least 95 (meth) acrylate alkyl units.
- the olefinic polymer adjuvant functionalized with at least one glycidyl group comprises, on average, from 30 to 500 alkyl (meth) acrylate units per macromolecule, preferably from 50 to 400 alkyl (meth) acrylate units, more preferably from 70 to 300 alkyl (meth) acrylate units, still more preferably from 90 to 250 alkyl (meth) acrylate units, and preferably from 95 to 200 alkyl (meth) acrylate units.
- the olefinic polymer adjuvant functionalized with at least one glycidyl group comprises, on average, at least 15 (meth) acrylate units. glycidyl per macromolecule, preferably at least 20 glycidyl (meth) acrylate units.
- the olefinic polymer adjuvant functionalized with at least one glycidyl group comprises, on average, from 15 to 200 glycidyl (meth) acrylate units per macromolecule, preferably from 15 to 150 glycidyl (meth) acrylate units, more preferably from 20 to 125 glycidyl (meth) acrylate units, still more preferably from 20 to 100 glycidyl (meth) acrylate units, and preferably from 20 to 90 glycidyl (meth) acrylate units.
- the average mass of the ethylene units present in one mole of olefinic polymer adjuvant functionalized with at least one glycidyl group is greater than or equal to 15,000 g, more preferably greater than or equal to 20,000 g, more preferably greater than or equal to 25,000g, preferably greater than or equal to 30,000g, and more preferably greater than or equal to 35,000g.
- the average weight of the ethylene units present in one mole of olefinic polymer adjuvant functionalized with at least one glycidyl group ranges from 15,000 to 200,000 g, more preferably from 20,000 to 150,000 g, and even more preferably from 25,000 to 100,000. g, preferably from 30,000 to 90,000 g, and more preferably from 35,000 to 88,000 g.
- the average weight of the alkyl (meth) acrylate units present in one mole of olefinic polymer adjuvant functionalized with at least one glycidyl group is greater than or equal to 3500 g, more preferably greater than or equal to 5000 g, and more preferably greater than or equal to 7,500 g, and preferably greater than or equal to 9,500 g.
- the average weight of the alkyl (meth) acrylate units present in one mole of olefinic polymer adjuvant functionalized with at least one glycidyl group ranges from 3500 to 50 000 g, more preferably from 5000 to 25 000 g, more preferably more preferably from 7,500 to 20,000 g, and preferably from 9,500 to 19,000 g.
- the average weight of the glycidyl (meth) acrylate units present in one mole of olefinic polymer adjuvant functionalized with at least one glycidyl group is greater than or equal to 1500 g, more preferably greater than or equal to 2000 g, and even more preferably greater than or equal to 2500 g, advantageously greater than or equal to 2750 g, and more preferably greater than or equal to 2900 g.
- the average weight of the glycidyl (meth) acrylate units present in one mole of olefinic polymer adjuvant functionalized with at least one glycidyl group ranges from 1500 to 20 000 g, more preferably from 2000 to 17 500 g, and even more preferentially. from 2500 to 15000 g, preferably from 2750 to 12 500 g, and more preferably from 2900 to 12000 g.
- the olefinic polymer builder content functionalized by at least one epoxide group in the bitumen / polymer composition according to the invention is preferably from 0.05 to 2.5% by weight relative to the total mass of the composition, plus preferably from 0.15 to 2% by weight, still more preferably from 0.2 to 1% by weight, more preferably from 0.4 to 1% by weight, even more preferably from 0.4 to 0.8% by weight. mass.
- the elastomer is advantageously a block copolymer or a mixture of block copolymers.
- the block copolymer comprises at least 3 consecutive blocks.
- thermally crosslinkable block copolymers of formula SBS in which each S independently represents a block based on monovinyl aromatic hydrocarbon monomers, B represents a block based on butadiene monomers, in which the S blocks represent, together, at least 15 mol% of the total number of moles of the thermally crosslinkable block copolymer, said thermally crosslinkable block copolymers have a weight average molecular weight of from 40,000 to 500,000 gsm 1 and have a higher vinyl group content or 20 mol%, based on the total number of moles of the thermally crosslinkable block copolymer.
- block is meant in the sense of the invention a polymer chain obtained by the polymerization of one or more monomers of the same chemical nature.
- the monovinylaromatic hydrocarbon monomers from which the S blocks of the thermally crosslinkable block copolymers defined above can be derived can be independently any known monovinylaromatic hydrocarbon compound for use in the preparation of block copolymers such as: styrene, o-methylstyrene, p-blocker and the like. methylstyrene, p-tert-butylstyrene, 2,4-dimethylstyrene, alpha-methylstyrene, vinylnaphthalene, vinyltoluene and vinylxylene or mixtures thereof.
- the preferred monovinyl aromatic hydrocarbon compound according to the present invention is styrene, which is used as a substantially pure monomer or as a major component in mixtures with minor proportions of another structurally related vinyl aromatic monomer, such as o-methylstyrene, p-methylstyrene, p-tert-butylstyrene, 2,4-dimethylstyrene, alpha-methylstyrene, vinylnaphthalene, vinyltoluene and vinylxylene, namely, in proportions of at most 10% in weight.
- the use of substantially pure styrene is particularly preferred in the present invention.
- the butadiene B monomer block used in the above-mentioned block copolymers is based on substantially pure butadiene monomers or having minor proportions, up to 10% by weight, of structurally related conjugated dienes.
- the polybutadiene is purely composed of butadiene monomers.
- the terms "molecular weight” or “molecular weight” or “average molecular weight” are expressed in g.mof 1 .
- the molecular weights mentioned in the description and the claims can be measured by Gel Permeation Chromatography (GPC) (or SEC for Size Exclusion Chromatography).
- GPC is a liquid chromatography method in which the polymers are separated according to their hydrodynamic volume, which is then converted to weight average molecular weight (Mw) and / or number average molecular weight (Mn).
- Mw weight average molecular weight
- Mn number average molecular weight
- GPC may be conventional or triple detection depending on the conversion method used.
- the hydrodynamic volume is converted by means of an external calibration.
- the standards used are generally standards of polystyrene or polymethylmethacrylates linear.
- the molecular weights are measured according to a polystyrene calibration.
- the molecular weight of the polymers measured by GPC is thus a molecular weight equivalent of styrene.
- the detector used is preferably a combination of a UV detector (ultraviolet) and a detector RI (refractive index difference).
- the system is equipped with 3 detectors: an RI detector, a light scattering detector and a viscosity detector (viscometer). Molecular weight values are obtained directly (without the need for a calibration curve) by processing the results obtained from each of the detectors.
- the thermally crosslinkable block copolymer of formula SBS used in the present invention has a weight average molecular weight Mw, measured by gel permeation chromatography with polystyrene standard, ranging from 40,000 to 500,000 gmof 1 .
- the thermally crosslinkable block copolymer of formula SBS used in the present invention has a weight average molecular weight Mw, measured by gel permeation chromatography with polystyrene standard, of less than or equal to 400 000 g.mof 1 , more preferably less than or equal to 250 000 g.mof 1 , even more preferably less than or equal to 200 000 g.mof 1 and advantageously less than or equal to 150 000 g.mof 1 .
- the thermally crosslinkable block copolymer of formula SBS used in the present invention has a weight average molecular weight Mw, measured by gel permeation chromatography with a polystyrene standard, greater than or equal to 50,000 gmof 1 , more preferably greater than or equal to 65 000 g.mof 1 , even more preferably greater than or equal to 75 000 g.mof 1 , and preferably greater than or equal to 100 000 g.mof 1 .
- the thermally crosslinkable block copolymer of formula SBS used in the present invention has a vinyl group content greater than or equal to 20 mol%, based on the total number of moles of copolymer. This vinyl content, determined by coupling 13 C NMR (carbon nuclear magnetic resonance) and 1 H NMR (proton nuclear magnetic resonance) spectroscopy, makes it possible to characterize the polymer.
- the thermally crosslinkable block copolymer of formula SBS used in the present invention preferably has a vinyl group content greater than or equal to 25 mol%, relative to the total number of moles of SBS copolymer, more preferably greater than or equal to 28. % in moles.
- the thermally crosslinkable block copolymer of formula SBS used in the present invention preferably has a vinyl group content of less than or equal to 50 mol%, relative to the total number of moles of SBS copolymer, more preferably less than or equal to 40. mol%, and even more preferably less than or equal to 35 mol%.
- the thermally crosslinkable block copolymer of formula SBS used in the present invention preferably has a content of vinyl groups greater than or equal to 15% by weight relative to the total weight of the copolymer, more preferably greater than or equal to 20% by weight. and even more preferably greater than or equal to 25% by weight.
- the thermally crosslinkable block copolymer of formula SBS used in the present invention preferably has a vinyl group content of less than or equal to 50% by weight relative to the total weight of the copolymer, more preferably less than or equal to 40% by weight. and even more preferably less than or equal to 30% by weight.
- the vinyl content in block B is preferably greater than or equal to 25% by weight relative to the total mass of the condensed polybutadiene units present in block B, more preferably greater than or equal to 30% by mass, and even more preferably greater than or equal to 35% by weight.
- the vinyl content in the B block is preferably less than or equal to 50% by weight relative to the total mass of the condensed polybutadiene units present in the B block, more preferably less than or equal to 45% by mass, and even more preferably less than or equal to 40% by weight.
- the units obtained by the 1,3-butadiene polymerization in a 1,2-addition or 1,4-addition mechanism have the same molecular weight.
- the contents of vinyl groups present in the block B expressed in mass or in moles are equivalent.
- the vinyl groups are distributed along the block B statistically. This characteristic results directly from the process used for the synthesis of the copolymer.
- the S blocks present in the thermally crosslinkable block copolymer of formula S-BS together represent at least 15 mol%, based on the total number of moles of thermally crosslinkable block copolymer of formula SBS, preferably at least 16 mol% .
- the blocks S together represent from 15% to 50% by moles, relative to the total amount of moles of thermally crosslinkable block copolymer of formula SBS, more preferably from 16% to 30% by moles, even more preferentially from 16% to 25% by moles, and preferably from 16% to 20% by moles.
- the monovinyl aromatic hydrocarbon content is the monovinyl aromatic hydrocarbon content
- thermally crosslinkable block copolymer of formula S-BS determined by 13 C NMR spectroscopy (Nuclear Magnetic Resonance of Carbon), is greater than or equal to 25% by mass, more preferably greater than or equal to 28% by mass even more preferably greater than or equal to 30% by weight, relative to the total weight of the thermally crosslinkable block copolymer of formula SBS.
- the monovinyl aromatic hydrocarbon content is the monovinyl aromatic hydrocarbon content
- thermally crosslinkable block copolymer of formula S-BS determined by 13 C NMR spectroscopy (carbon magnetic resonance of carbon), ranges from 25% to 40% by weight, still more advantageously from 28% to 35% by weight. mass, based on the total mass of the thermally crosslinkable block copolymer of formula SBS.
- the elastomer consists essentially of one or more thermally crosslinkable block copolymer (s) of formula S-B-S.
- the thermally crosslinkable block copolymer (s) of formula SBS are used in combination with one or more block copolymers of formula SB in which S is a block based on monovinyl hydrocarbon monomers. aromatics, preferably based on styrene, and B is a block based on butadiene monomers.
- the mixture of the copolymers consists predominantly of the copolymer (s) thermally crosslinkable blocks (s) of formula SBS.
- the mass ratio SBS / SB ranges from 99.5: 0.5 to 80:20 by weight, more preferably from 99.5: 0.5 to 90:10 by weight.
- block copolymers of the invention are in a substantially non-hydrogenated form.
- the thermally crosslinkable block copolymer of formula SBS is obtained by coupling two block copolymers of formula SB in which the blocks S and B are as described above in the definition of the thermally crosslinkable block copolymer of SBS formula.
- the coupling efficiency of the elastomer, measured by gel permeation chromatography is greater than or equal to 50%, more preferably greater than or equal to 75%, even more preferably greater than or equal to equal to 90% and advantageously greater than or equal to 95%.
- thermally crosslinkable block copolymers of formula S-BS that can be used in the compositions according to the invention as well as their processes of preparation are described in US Pat. No. 5,798,401.
- composition may comprise other elastomers than thermally crosslinkable block terpolymers of formula S-B-S and block copolymers of formula S-B.
- composition according to the invention may contain other known bitumen elastomers such as S-B1-B2 copolymers (styrene-butadiene-butadiene block copolymer in which the two butadiene blocks B1 and B2 have a different vinyl content.
- S-B1-B2 copolymers styrene-butadiene-butadiene block copolymer in which the two butadiene blocks B1 and B2 have a different vinyl content.
- SIS styrene-isoprene-styrene
- SBS * styrene butadiene rubber block copolymer
- EPDM modified ethylene propylene diene
- polychloroprene polynorbomene
- natural rubber recycled rubber polybutene
- polyisobutylene SEBS (copolymer of styrene, ethylene, butylene and styrene).
- Mention may also be made of elastomers made from styrene monomers and butadiene monomers allowing crosslinking without a crosslinking agent as described in documents WO2007 / 058994 and by the applicant in patent application WO2011 / 013073.
- thermally crosslinkable block copolymers of formula SBS and the block copolymers of formula SB which have been defined above represent, together, at least 50% by weight of the elastomers present in the composition, more preferably at least 70% by weight. and even more preferably at least 90% by weight.
- the elastomer consists essentially of thermally crosslinkable block copolymers of formula S-B-S and of block copolymers of formula S-B.
- composition may also further comprise other plastomers distinct from the olefinic polymer adjuvant functionalized with at least one epoxide group.
- composition according to the invention may also contain one or more polymeric components chosen from the category of known thermoplastics and plastomers for bitumen.
- thermoplastics there may be mentioned polyethylenes such as PE (polyethylene), HDPE (high density polyethylene) and polypropylene PP.
- PE polyethylene
- HDPE high density polyethylene
- polypropylene PP polypropylene
- plastomers By way of example of plastomers, mention may be made of LEVA (polyethylene-vinyl acetate copolymer), 1 ⁇ MA (polyethylene-methyl acrylate copolymer), copolymers of olefins and unsaturated carboxylic esters, and 1 ⁇ BA (polyethylene-acrylate copolymer). butyl), copolymers of ethylene and esters of acrylic acid, methacrylic acid or maleic anhydride, ethylene-propylene copolymers, and ABS (acrylonitrile-butadiene-styrene).
- LEVA polyethylene-vinyl acetate copolymer
- 1 ⁇ MA polyethylene-methyl acrylate copolymer
- copolymers of olefins and unsaturated carboxylic esters and 1 ⁇ BA (polyethylene-acrylate copolymer).
- butyl copolymers of ethylene and esters of acrylic acid, methacrylic acid or maleic anhydride,
- the thermally crosslinkable block copolymers of formula SBS and the block copolymers of formula SB represent, together, at least 50% by weight relative to the total weight of all the thermally crosslinkable block copolymers of formula S-BS, block copolymers of formula SB, thermoplastics and plastomers distinct from the olefinic polymer adjuvant functionalized by at least one epoxide group present in the composition, more preferably at least 70% by weight.
- the composition may further comprise thermally crosslinkable block copolymers of formula SBS and copolymers of formula SB, at least one other elastomer as defined above and at least one plastomer as defined hereinabove. above.
- the thermally crosslinkable block copolymers of formula SBS and the block copolymers of formula SB represent at least 50% by weight relative to the total weight of all the thermally crosslinkable block copolymers of formula SBS, block copolymers of formula SB, other elastomers and plastomers distinct from the olefinic polymer adjuvant functionalized with at least one epoxide group present in the composition, more preferably at least 70% by weight.
- the content of elastomers in the bitumen / polymer composition according to the invention is preferably from 0.5% to 20% by weight relative to the total weight of the bitumen / polymer composition, more preferably from 0.5% to 15% by weight, more preferably from 1% to 5% by weight, even more preferably from 2% to 4% by weight.
- bitumen / polymer composition of the invention in a known manner:
- a) adhesive adhesives and / or surfactants are generally chosen from alkylamine derivatives, alkyl-polyamine derivatives, alkyl amidopolyamine derivatives and quaternary ammonium salt derivatives, taken alone or as a mixture.
- the amount of adhesiveness dopes and / or surfactants in the bitumen / polymer composition is, for example, between 0.2% and 2% by weight, preferably between 0.5% and 1% by weight relative to to the total mass of the bitumen / polymer composition.
- waxes of animal, plant or hydrocarbon origin in particular long-chain hydrocarbon waxes, for example polyethylene waxes or paraffins, optionally oxidized. Amide waxes such as ethylene bisstearamide may also be added.
- the paraffins are chosen from polyalkylenes.
- the paraffins are polymethylene paraffins and polyethylene paraffins. These paraffins may be of petroleum origin or come from the chemical industry.
- paraffins are synthetic paraffins resulting from the conversion of biomass and / or natural gas.
- paraffins may also contain a large proportion of so-called "normal" paraffins, that is, straight-chain, unbranched linear paraffins (saturated hydrocarbons).
- the paraffins may comprise from 50 to 100% of normal paraffins and from 0 to 50% of isoparaffins and / or branched paraffins.
- the paraffins comprise 85 to 95% of normal paraffins and 5 to 15% of isoparaffins and / or branched paraffins.
- the paraffins comprise from 50 to 100% of normal paraffins and from 0 to 50% of isoparaffins.
- the paraffins comprise from 85 to 95% of normal paraffins and from 5 to 15% of isoparaffins.
- the paraffins are paraffins of polymethylene. More particularly, paraffins are synthetic paraffins of polymethylene, especially paraffins resulting from the conversion of synthesis gas by the Fischer-Tropsch process. In the Fischer-Tropsch process, paraffins are obtained by reaction of hydrogen with carbon monoxide on a metal catalyst. Fischer-Tropsch synthesis methods are described for example in the publications EP 1 432 778, EP 1 328 607 or EP 0 199 475.
- the paraffins are Fischer-Tropsch polymethylene paraffins marketed by Sasol, in particular under the Sasobit® trademark.
- oils based on animal and / or vegetable fats or hydrocarbon oils of petroleum origin such as oils based on animal and / or vegetable fats or hydrocarbon oils of petroleum origin.
- the oils of animal and / or vegetable origin may be in the form of free fatty acids, triglycerides, diglycerides, monoglycerides, in esterified form, for example in the form of methyl ester.
- anti-foam additives especially (but not exclusively) selected from polysiloxanes, oxyalkylated polysiloxanes, and fatty acid amides from vegetable or animal oils.
- detergent and / or anti-corrosion additives in particular (but not limited to) selected from the group consisting of amines, succinimides, alkenylsuccinimides, polyalkylamines, polyalkylamines and polyetheramines; imidazolines.
- lubricant additives or anti-wear agent especially (but not exclusively) selected from the group consisting of fatty acids and their ester or amide derivatives, in particular glycerol monooleate, and monocarboxylic acid derivatives and polycyclic.
- antioxidants for example of hindered phenolic phenols or amines of paraphenylene diamine alkylated type.
- additives for lowering the mixing temperature of asphalt and asphalt those for improving the adhesion of bituminous binders to fillers and aggregates, such as polyisobutylene succinimides.
- acids such as polyphosphoric acid or diacids, especially fatty diacids.
- the additives are used according to the amounts well known to those skilled in the art, depending on the nature of the additive, depending on the bitumen base and the expected properties.
- the bitumen base comprises from 0.1% to 10% by weight, preferably from 0.5% to 5% by weight, more preferably from 0.5% to 2.5% by weight. mass of chemical additive in relation to the total mass of the bitumen base.
- composition The composition :
- the invention relates to the composition resulting from the simple mixing of its components and the heat-curable composition resulting from the heat treatment of this composition.
- Heat treatment is described below in the section entitled "The Preparation Process”.
- the percentages described below relate to the mixing of the components and are found in the thermocured composition.
- bitumen / polymer composition is free of sulfur-containing crosslinking agent.
- bitumen / polymer composition comprises less than 6 ppm of sulfur-containing crosslinking agent.
- bitumen / polymer composition consists essentially of:
- bitumen / polymer composition comprises:
- bitumen / polymer composition comprises:
- bitumen / polymer composition consists essentially of:
- bitumen / polymer composition consists essentially of:
- bitumen / polymer composition consists essentially of:
- bitumen / polymer composition consists essentially of:
- the elastomeric mass / olefinic polymer builder ratio is advantageously from 15/1 to 2/1, preferably from 12/1 to 5/2.
- thermo-crosslinked composition is obtained directly by heat treatment of the bitumen / polymer composition defined above, the heat treatment inducing the crosslinking of the bitumen / polymer composition.
- the crosslinking is essentially thermal.
- essentially thermal crosslinking is meant in the sense of the invention a crosslinking created by heat treatment, in the absence of chemical crosslinking agent.
- a composition obtained by such a process is thus distinguished from compositions obtained by crosslinking in the presence of crosslinking agents, in particular crosslinking agents chosen from sulfur-containing crosslinking agents.
- bitumen / polymer compositions of the invention may be prepared by any method known to those skilled in the art. Typically these processes include mixing the components and heating the mixture. The bitumen can be heated before mixing. Usually, the bitumen is heated before mixing, and the other components are added to the bitumen without having been previously heated.
- bitumen / polymer composition is prepared by bringing into contact:
- the reaction is carried out at temperatures ranging from 100 ° C. to 200 ° C., preferably from 150 ° C. to 200 ° C., preferably from 160 ° C. to 200 ° C., more preferably from 160 ° C to 95 ° C, even more preferably from 160 ° C to 180 ° C.
- This embodiment thus makes it possible to prepare a bitumen / thermo-polymerized polymer composition.
- the process of the invention can be carried out by means of agitation producing high shear or low shear agitation.
- the process of the invention may comprise successive sequences with different modes of agitation, for example the process of the invention may comprise at least two successive stirring sequences, a first sequence producing high shear agitation followed by a second sequence producing low shear agitation, preferably ranging from 400 rpm to 1000 rpm.
- the process for producing the bitumen / thermo-polymer composition comprises, for example, the following successive steps:
- thermo-crosslinkable elastomer i) introducing into a reactor the bitumen, the thermo-crosslinkable elastomer and the olefinic polymer adjuvant functionalized with at least one epoxide group, optionally the additives,
- the mixture is stirred until a homogeneous mixture is obtained and heated to a temperature ranging from 100 ° C. to 200 ° C., preferably from 150 ° C. to 200 ° C., preferably from 160 ° C. to 200 ° C. more preferably from 160 ° C to 195 ° C, even more preferably from 160 ° C to 180 ° C.
- step ii) is preferably carried out for a period of at least 10 minutes, preferably from 1 hour to 24 hours, more preferably from 1 hour to 10 hours.
- the olefinic polymer adjuvant functionalized with at least one epoxide group may be incorporated into the bitumen before or after the thermally crosslinkable elastomer, simultaneous incorporation may also be envisaged.
- the olefinic polymer adjuvant functionalized with at least one epoxide group is incorporated into the bitumen before or after the elastomer.
- the olefinic polymer adjuvant functionalized with at least one epoxide group and the elastomer are incorporated at the same time with the bitumen.
- the process for producing the bitumen / thermocoated polymer composition comprises, for example, the following successive steps:
- thermo-crosslinkable elastomer i) introducing into a reactor the bitumen preheated to a temperature ranging from 100 ° C. to 200 ° C., the thermo-crosslinkable elastomer and the olefinic polymer adjuvant functionalized with at least one epoxide group, optionally the additives,
- the mixture is homogenized by passing through a mill with high shear, preferably between 1000 and 6000 rev / min, preferably for a duration of at least 1 minute, more preferably ranging from 1 min to 2 hours, even more preferably from 1 min to 30 min,
- the mixture obtained in stage ii) is then transferred to a maturation tank, preferably for a period of at least 30 minutes, more preferably 30 minutes to 24 hours, even more preferably from 1 hour to 10 hours; before storage or use.
- the curing step iii) described above is preferably carried out at a temperature ranging from 100 ° C. to 200 ° C., more preferably ranging from 150 ° C. to 200 ° C., still more preferably ranging from 160 ° C. At 200 ° C, preferably from 160 ° C to 195 ° C and more preferably from 160 ° C to 180 ° C.
- the stirring at high shear and in particular the stirring carried out by passing through a high shear mill, makes it possible to facilitate good dispersion and good distribution of the polymer and the olefinic polymer adjuvant.
- bitumen / polymer compositions obtained according to the invention are envisaged.
- the bitumen / polymer compositions can be used for the preparation of a bitumen / polymer binder.
- the bitumen / polymer binder according to the invention can be used in combination with aggregates, especially road aggregates.
- the invention relates in particular to bituminous mixes as materials for the construction and maintenance of roadway bodies and their pavement, as well as for carrying out all road works.
- Asphalt mix means a mixture of a bituminous binder with aggregates and optionally mineral and / or synthetic fillers.
- the bituminous mix comprises a bitumen / polymer binder according to the invention, and optionally mineral and / or synthetic fillers, preferably chosen from fines, sand, chippings and recycling costs.
- the aggregates are inorganic and / or synthetic aggregates, in particular recycling mills with dimensions greater than 2 mm, preferably between 2 mm and 20 mm.
- bitumen / polymer binder according to the invention may advantageously be used to prepare a surface coating, a hot mix, a warm mix, a cold mix, a cold mix or a serious emulsion.
- the invention also relates to asphalts as materials for manufacturing and covering sidewalks.
- asphalt is meant a mixture of bituminous binder with mineral and / or synthetic fillers.
- An asphalt comprises a bitumen / polymer binder according to the invention and mineral fillers such as fines, sand or chippings and / or synthetic fillers.
- the mineral fillers consist of fines (particles smaller than 0.063 mm), sand (particles with dimensions of between 0.063 mm and 2 mm) and possibly chippings (particles with dimensions larger than 2 mm, preferably between 2 mm and 4 mm).
- Asphalts are 100% compact and are mainly used to make and cover sidewalks, while asphalt mixes have a compactness of less than 100% and are used to make roads. Unlike asphalt, asphalt is not compacted with a roller when it is put in place.
- bitumen / polymer composition in various industrial applications, in particular for preparing a sealing coating, a membrane or an impregnation layer.
- industrial applications of the bituminous compositions according to the invention mention may be made of the manufacture of waterproofing membranes, anti-noise membranes, insulation membranes, surface coatings, carpet tiles, 'impregnation.
- the subject of the invention is also the use of bitumen / polymer binders, asphalt mixes and cast asphalts according to the invention for the manufacture of road, pavement, sidewalk, road and urban pavement coverings. , floors, waterproofing of buildings or structures, in particular for the manufacture in road application, foundation layers, base layers, bedding layers, surface layers such as connecting layers and / or the wearing courses.
- the subject of the invention is also the use of at least one elastomer and at least one olefinic polymer adjuvant functionalized with at least one epoxide group as defined above to improve the mechanical properties of a bitumen or of a bituminous composition, especially the elastic properties.
- the subject of the invention is the use of at least one elastomer and at least one olefinic polymer adjuvant functionalized with at least one epoxide group as defined above in order to increase the value of the elongation at the rupture and / or the total energy of a bitumen or a bituminous composition.
- the invention also relates to a process for improving the mechanical properties, in particular the elastic properties, of a bitumen or a bituminous composition, said process comprising the introduction into said bitumen or said bituminous composition of at least one elastomer and at least one olefinic polymer adjuvant functionalized with at least one epoxide group as defined above.
- the invention relates to a method for increasing the value of elongation at break and / or the total energy of a bitumen or a bituminous composition, said method comprising the introduction into said bitumen or said bituminous composition of at least one elastomer and at least one olefinic polymer adjuvant functionalized with at least one epoxide group as defined above.
- Experimental part :
- bitumens The properties of bitumens are measured using the methods described below:
- Stability Storage stability is assessed by measuring the difference in penetrability (APNU) and the difference in TB A (DTBA) after 3 days of storage at 180 ° C.
- Bitumen Base (B) a 35/50 grade bitumen base was used with a penetrability P 25 53 1/10 mm and a TBA 5l, 8 ° C and commercially available from TOTAL group under the brand ® AZALT .
- Adj - Olefinic Polymer Adjuvants
- Adjuvant Al ethylene / butyl acrylate / glycidyl methacrylate terpolymer in mass proportions, determined by 1 H NMR spectroscopy (proton nuclear magnetic resonance), respectively 70/21/9 and possessing a Melt Flow Rate (MFR) melting index (90 ° C / 2.16 kg) of 8 g / l / min, calculated according to ASTM D1238-ISO 133.
- MFR Melt Flow Rate
- This polymer is commercially available under the name Elvaloy® 4170P from the company Dupont and presents:
- Mn a number-average molecular weight (Mn), measured by gel permeation chromatography with a triple detection, equal to 16 220 gmol 1 ,
- Adjuvant A2 Ethylene terpolymer / ethyl acrylate / glycidyl methacrylate in mass proportions, respectively 74/20/6 and having an MFR (Melt Flow Rate) melt index (l90 ° C / 2, l6 kg) of 12g / 10min, calculated according to ASTM D1238-IS01133.
- MFR Melt Flow Rate
- This polymer is commercially available under the name Elvaloy® 5160 from the company Dupont and presents:
- Mn a number-average molecular weight (Mn), measured by triple detection gel permeation chromatography, equal to 48,720 gmol 1 ,
- Mw weight-average molecular mass
- Ethylene / ethyl acrylate / glycidyl methacrylate terpolymer in proportions by mass, 74/16/10 and having a Melt Flow Rate (MFR) (l90 ° C / 2, l6 kg) of 8 g / 10 min, calculated according to ASTM D1238-ISO 133.
- MFR Melt Flow Rate
- This polymer is commercially available under the name Elvaloy® 5170 from the company Dupont and presents:
- Mn a number-average molecular mass (Mn), measured by gel permeation chromatography with a triple detection, equal to 116,700 g.mol 1 ,
- Mw weight-average molecular mass
- El elastomer mixture based on S-B1-B2 block copolymer also comprising (S-B1-B2) nX copolymer with S represents a monovinyl aromatic hydrocarbon block having a peak molecular weight of 10,000 to 25,000, B1 is a polybutadiene block having a vinyl content of 15 mol% or less, B2 is a polybutadiene block having a vinyl content of 25 mol% or more, the ratio of B1 / B2 is greater than or equal to 1 : 1, the S-B1-B2 block copolymer has a peak molecular weight of 40,000 to 200,000, n is an integer from 2 to 6, X is the residue of a coupling agent, the block copolymer (S-B1-B2) nX has a peak molecular weight which is 1.5 to 6.0 times the peak molecular weight of the S-B1-B2 block copolymer, wherein the mass ratio S-B1-B2 / (S-B
- the vinyl group content of the mixture is 24.1 mol% relative to the total number of moles of polymers.
- the content of monovinyl aromatic hydrocarbon monomers is 15.8 mol% relative to the total number of moles of polymers.
- the weight average molecular weight of the mixture is 285 000 g.mof 1 .
- This elastomer is available from Kraton under the name MD246.
- Elastomer E2 styrene / butadiene / styrene block copolymer (SBS), 18.8 mol% styrene and 81.2 mol% butadiene, based on the total number of moles of copolymer.
- the content of vinyl groups is 29.4 mol% relative to the total number of moles of copolymer.
- the copolymer has a mass molecular weight (Mw) of 131,000 g.mol 1 .
- This copolymer is commercially available from KRATON under the name Dl 192.
- bitumen base - 95.5% by weight of a bitumen base
- Concentrated compositions Ci to are comparative and concentrated compositions C 4 and C 5 are according to the invention.
- the storage stability of the concentrated compositions C 1 to C 5 prepared above is evaluated by measuring the difference in penetrability (APffy) and the difference in TBA (DTBA) of each composition after 3 days of storage at 180 ° C.
- Table 2 Storage stability of the concentrated compositions C 1 to C 5
- the values of the penetrability and the ball and ring softening temperature of the concentrated compositions C 1 to C 5 change very little even after storage for 3 days at 180 ° C. These compositions are therefore stable storage.
- the concentrated compositions C 1 to C 5 obtained in B 1) are diluted to 80% by weight in the bitumen base B previously heated to a temperature of 180 ° C.
- the diluted mixture is then introduced into a reactor in which it is subjected to mechanical stirring at 400 rpm at 180 ° C. for 1 hour.
- the diluted compositions C 1 to C 5 'resulting therefrom are respectively obtained from the concentrated compositions C 1 to C 5.
- the diluted CT-C 5 'compositions obtained include:
- bitumen 96.4% by weight of bitumen.
- compositions C 4 'and CY thus have improved mechanical properties with respect to compositions C 1' to CY.
- compositions based on elastomer E2 have improved mechanical properties compared to compositions based on El elastomer:
- the composition C 4 ' has a energy at 400%, a total energy and a value of stress at the maximum deformation higher than the composition C 2 ', and
- the composition CY has a 400% energy, a total energy and a maximum value of stress at maximum deformation with respect to the composition C 3 '.
- compositions based on the elastomer E2 thus have improved mechanical properties compared to the bitumen / polymer compositions prepared from the El elastomer.
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Abstract
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FR1853793A FR3080856B1 (fr) | 2018-05-02 | 2018-05-02 | Composition bitume/polymere presentant des proprietes mecaniques ameliorees |
PCT/FR2019/051009 WO2019211560A1 (fr) | 2018-05-02 | 2019-04-30 | Composition bitume/polymere presentant des proprietes mecaniques ameliorees |
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EP (1) | EP3788108A1 (fr) |
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DK4310152T3 (da) | 2022-07-21 | 2025-02-24 | Totalenergies Onetech | Anvendelse af en hydroxid til justering af de elastiske egenskaber på en tværbundet elastomer-modificeret bitumen |
EP4324884A1 (fr) | 2022-08-19 | 2024-02-21 | TotalEnergies OneTech | Composition bitume/polymère à propriétés mécaniques améliorées |
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GB8508613D0 (en) | 1985-04-02 | 1985-05-09 | British Petroleum Co Plc | Chemical process |
TW379243B (en) | 1995-09-13 | 2000-01-11 | Shell Int Research | Bituminous composition |
FR2748487B1 (fr) | 1996-05-10 | 1998-07-10 | Elf Antar France | Compositions bitume/polymere a stabilite amelioree et leur application a la realisation de revetements |
AU9397801A (en) | 2000-10-13 | 2002-04-22 | Bp Exploration Operating | Fischer-tropsch synthesis process |
BR0210649B1 (pt) | 2001-07-27 | 2015-03-10 | Sasol Tech Pty Ltd | Processo para preparar e usar um catalisador de cobalto de síntese de fischer-tropsch em fase de suspensão |
EP1948732B1 (fr) | 2005-11-14 | 2014-01-08 | KRATON Polymers Research B.V. | Procede de preparation d'une composition liante bitumeuse |
BRPI0810763A8 (pt) | 2007-05-01 | 2018-02-14 | Kraton Polymers Us Llc | Composição de copolímero em bloco, composição aglutinante betuminosa e processo para preparação de uma composição aglutinante betuminosa |
FR2948677B1 (fr) | 2009-07-29 | 2011-09-16 | Total Raffinage Marketing | Procede de preparation de compositions bitume/polymere reticulees sans agent reticulant |
FR3013053B1 (fr) | 2013-11-14 | 2015-12-25 | Total Marketing Services | Composition bitume/polymere a proprietes mecaniques a froid ameliorees |
FR3041355B1 (fr) * | 2015-09-18 | 2017-09-01 | Total Marketing Services | Composition bitume / polymere presentant des proprietes mecaniques ameliorees |
FR3050210A1 (fr) * | 2016-04-15 | 2017-10-20 | Total Marketing Services | Procede de preparation d'une composition bitume / polymere presentant des proprietes ameliorees |
FR3050510B1 (fr) | 2016-04-26 | 2018-09-21 | Vernet | Unite de melange et robinet mitigeur comprenant une telle unite de melange |
-
2018
- 2018-05-02 FR FR1853793A patent/FR3080856B1/fr active Active
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2019
- 2019-04-30 US US17/052,474 patent/US11560479B2/en active Active
- 2019-04-30 EP EP19728483.9A patent/EP3788108A1/fr active Pending
- 2019-04-30 WO PCT/FR2019/051009 patent/WO2019211560A1/fr active Application Filing
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2020
- 2020-10-30 SA SA520420450A patent/SA520420450B1/ar unknown
Also Published As
Publication number | Publication date |
---|---|
WO2019211560A1 (fr) | 2019-11-07 |
FR3080856B1 (fr) | 2020-07-10 |
SA520420450B1 (ar) | 2023-02-20 |
US11560479B2 (en) | 2023-01-24 |
US20210047514A1 (en) | 2021-02-18 |
FR3080856A1 (fr) | 2019-11-08 |
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