EP3963016A1 - Use of an aqueous polymer dispersion for the production of coated macadams - Google Patents
Use of an aqueous polymer dispersion for the production of coated macadamsInfo
- Publication number
- EP3963016A1 EP3963016A1 EP20731918.7A EP20731918A EP3963016A1 EP 3963016 A1 EP3963016 A1 EP 3963016A1 EP 20731918 A EP20731918 A EP 20731918A EP 3963016 A1 EP3963016 A1 EP 3963016A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- binder
- particles
- glass transition
- polymer
- mixes
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000004815 dispersion polymer Substances 0.000 title description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 102
- 239000002245 particle Substances 0.000 claims abstract description 96
- 229920000642 polymer Polymers 0.000 claims abstract description 87
- 239000006185 dispersion Substances 0.000 claims abstract description 46
- 230000009477 glass transition Effects 0.000 claims abstract description 27
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims description 64
- 239000010426 asphalt Substances 0.000 claims description 32
- 238000000576 coating method Methods 0.000 claims description 25
- 239000010410 layer Substances 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 21
- 239000000178 monomer Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 230000001747 exhibiting effect Effects 0.000 claims description 14
- 239000000654 additive Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 239000008346 aqueous phase Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000007720 emulsion polymerization reaction Methods 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000011398 Portland cement Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000008065 acid anhydrides Chemical class 0.000 claims description 2
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 150000001244 carboxylic acid anhydrides Chemical group 0.000 claims description 2
- 150000001993 dienes Chemical class 0.000 claims description 2
- 239000003995 emulsifying agent Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- 235000012245 magnesium oxide Nutrition 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims 1
- 235000012241 calcium silicate Nutrition 0.000 claims 1
- 239000000391 magnesium silicate Substances 0.000 claims 1
- 235000012243 magnesium silicates Nutrition 0.000 claims 1
- 239000007787 solid Substances 0.000 description 20
- 238000009472 formulation Methods 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 description 16
- 239000011707 mineral Substances 0.000 description 16
- 235000010755 mineral Nutrition 0.000 description 16
- 239000000839 emulsion Substances 0.000 description 15
- -1 fatty acid carboxylates Chemical class 0.000 description 8
- 238000007906 compression Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000002736 nonionic surfactant Substances 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 230000007480 spreading Effects 0.000 description 5
- 238000003892 spreading Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 150000001732 carboxylic acid derivatives Chemical group 0.000 description 4
- 239000007771 core particle Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010420 shell particle Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011258 core-shell material Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000005070 ripening Effects 0.000 description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 125000000008 (C1-C10) alkyl group Chemical group 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 241000283986 Lepus Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- PBJZAYSKNIIHMZ-UHFFFAOYSA-N ethyl carbamate;oxirane Chemical compound C1CO1.CCOC(N)=O PBJZAYSKNIIHMZ-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003871 sulfonates Chemical class 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical class OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- KTZVZZJJVJQZHV-UHFFFAOYSA-N 1-chloro-4-ethenylbenzene Chemical compound ClC1=CC=C(C=C)C=C1 KTZVZZJJVJQZHV-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- XUDBVJCTLZTSDC-UHFFFAOYSA-N 2-ethenylbenzoic acid Chemical compound OC(=O)C1=CC=CC=C1C=C XUDBVJCTLZTSDC-UHFFFAOYSA-N 0.000 description 1
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 1
- CEBRPXLXYCFYGU-UHFFFAOYSA-N 3-methylbut-1-enylbenzene Chemical compound CC(C)C=CC1=CC=CC=C1 CEBRPXLXYCFYGU-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920013683 Celanese Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010882 bottom ash Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- YLUIKWVQCKSMCF-UHFFFAOYSA-N calcium;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Ca+2] YLUIKWVQCKSMCF-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- YCUBDDIKWLELPD-UHFFFAOYSA-N ethenyl 2,2-dimethylpropanoate Chemical compound CC(C)(C)C(=O)OC=C YCUBDDIKWLELPD-UHFFFAOYSA-N 0.000 description 1
- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical compound CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 150000002314 glycerols Chemical class 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- LDHQCZJRKDOVOX-IHWYPQMZSA-N isocrotonic acid Chemical compound C\C=C/C(O)=O LDHQCZJRKDOVOX-IHWYPQMZSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003904 phospholipids Chemical class 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical class C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229940083575 sodium dodecyl sulfate Drugs 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/53—Core-shell polymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/30—Coherent pavings made in situ made of road-metal and binders of road-metal and other binders, e.g. synthetic material, i.e. resin
Definitions
- the present invention relates to the use of an aqueous polymer dispersion for the preparation of a binder intended for the manufacture of a road or urban mix.
- the aqueous polymer dispersion comprises particles based on at least two polymers each having distinct glass transition temperatures.
- a subject of the invention is also said mixes based on this aqueous polymer dispersion and a road or urban coating comprising the mixes of the invention.
- Roads, pavements and various urban developments must support heavy road and / or pedestrian traffic. It is therefore essential that these coatings have mechanical properties allowing them to withstand the stresses induced by this traffic over time, regardless of the environmental modifications undergone, such as for example the significant temperature changes that may take place during the different seasons. .
- asphalt mixes which are used in particular for the manufacture of wearing courses or pavement layers.
- a mix consists of a granular fraction and a binder.
- the granular fraction is a mixture of aggregates, fines and sand. Aggregates are most often made from massive or sedimentary rocks (from sand to chippings) but they can also come from recycled or synthetic products.
- the binder makes it possible to bond the aggregates together and to ensure good mechanical strength of the asphalt layer.
- the binder in general, can for example be a hydrocarbon binder, a synthetic binder, or a plant binder.
- the mixes are completely covered with binder during their manufacture then applied by spreading and compacted to obtain road surfaces.
- the hydrocarbon mixes, coated with bitumen, are among the most used for these applications and responsible for the black color of the roads.
- the properties of the mixes such as the mechanical, thermal and acoustic properties, the tightness of the resulting coating, are modulated by the nature of the granular fraction and of the binder. Thus, researchers are always on the lookout for new materials to improve these different properties.
- an aqueous polymer dispersion comprising particles based on polymers exhibiting distinct glass transition temperatures for the preparation of a binder intended for the manufacture of mixes makes it possible to modulate the mechanical properties of asphalt in order in particular to obtain an optimum stiffness / flexibility ratio of the asphalt layer.
- the particles suspended in the aqueous dispersion can be structured such that a positive gradual gradient of glass transition temperature is observed from the surface to the center of the particle.
- the particles suspended in this aqueous polymer dispersion can also be in the form of so-called core / shell particles (more commonly described in English under the term “core shell particle”).
- core / shell particle denotes polymer particles consisting of a polymer core surrounded by a shell (or shell) of a different polymer.
- the nature of the polymers of the core or of the shell are chosen in a specific manner according to the intended uses and make it possible to modulate the mechanical, physical and chemical properties of the particles. For example, it is possible to obtain particles having the particularity of exhibiting several distinct glass transition temperatures. Thus, the envelope and the core of the particle will have different mechanical properties, exhibiting a more rigid or rubbery character depending on the nature of the polymer constituting them.
- WO2009 / 09559 describes an aqueous dispersion comprising particles structured in the core / shell, based on polymers PI and P2 having glass transition temperatures Tgl and Tg2 for the preparation of decorative and industrial paints.
- Application WO2009 / 016053 relates to a coating composition intended to cover substrates, in particular paper, to make them more resistant to oil and grease.
- These compositions comprise polymer particles structured in the core / shell in an aqueous medium.
- These particles comprise a core made up of a polymer whose glass transition temperature is lower than that of the polymer constituting the shell.
- the envelope therefore has a more rigid character than the core of the particle which is more rubbery.
- Application EP 1,434,803 describes an aqueous dispersion for surface coating or as an adhesive, based on various polymers, comprising in particular vinyl polymers having a specific composition in gradient allowing them to have modulable properties.
- the aqueous dispersion obtained thus offers an advantageous combination of minimum film-forming temperature, hardness and elasticity.
- the vinyl polymers can, for example, be obtained from compositions of monomers exhibiting distinct glass transition temperatures, but also chemical functionalities, molecular masses, hydrophobicity, etc. different.
- an aqueous dispersion based on polymer particles exhibiting distinct glass transition temperatures within the particle itself has never been described for the preparation of a binder intended for the manufacture of road or urban mixes.
- the use of an aqueous polymer dispersion according to the present invention makes it possible to obtain a binder intended for the production of mixes having a low film-forming temperature and giving the resulting coated layer an optimum compromise between rigidity and flexibility.
- this type of binder has the advantage of being translucent and therefore makes it possible to produce coatings the color of which is that of the granular materials which constitute them.
- Asphalt mixes made of such a binder are therefore particularly suitable for pedestrian and cycle-friendly areas with little traffic, forest lanes, riverbank lanes, sidewalks and can contribute to the safety of these spaces through greater readability and visual differentiation of the traffic. different arrangements.
- the many artificial surfaces of urbanized environments are largely composed of mineral materials, such as asphalt, asphalt and concrete, with low solar reflectance powers.
- the multiplication of these surfaces is one of the most important factors in the creation of urban heat islands.
- the use of an aqueous polymer dispersion for the preparation of a clear binder intended for the production of mixes can thus contribute to the cooling of the coatings.
- a first object of the invention therefore consists in the use of an aqueous dispersion comprising at least one anionic surfactant and p ⁇ particles based on at least two polymers exhibiting distinct glass transition temperatures, so that the polymer having the highest glass transition temperature, greater than or equal to 10 ° C, is at the center of the particle p ⁇ and the polymer with the lowest glass transition temperature, less than or equal to 0 ° C, is at the surface of the p ⁇ particle, for the preparation of a binder intended for the manufacture of a road or urban asphalt.
- road or urban mix is meant, within the meaning of the present invention, a mixture of a granular fraction and a binder, said granular fraction comprising aggregates, fines and sand.
- the coated materials are obtained by mixing the binder and the granular fraction until the breaking of the emulsion is observed which corresponds to the evaporation or to the elimination by drainage of the water included in the emulsion and to the formation of a binder film coating the granular fraction.
- the urban asphalt according to the present invention is particularly suitable for surfaces with little traffic and urban developments such as pedestrian paths, cycle paths, greenways, squares, squares, playgrounds or sports grounds. Asphalt is particularly suitable for vehicular traffic lanes, such as roads, sidewalks and streets.
- binder is understood to mean any binder of synthetic origin, preferably translucent, based on an aqueous dispersion of polymer particles as defined in the present application which can be used for the production of a coated material. , advantageously of a clear mix.
- residual binder is understood to mean the binder included in the mixes after the coating and removal of the water (and / or solvents where appropriate) from the dispersion.
- the residual binder is anhydrous.
- anionic surfactant means a surfactant product, that is to say capable of modifying the surface tension between two surfaces, ionizing in aqueous solution to provide anions and responsible for the activity. of surface.
- glass transition temperature (denoted Tg) is meant the temperature below which the physical properties of amorphous materials vary from a rubbery state to a glassy state. Thus, Tg is also the temperature below which molecules have little relative mobility. The glass transition temperature is typically measured by means of the following tests:
- the highest Tg which can be denoted Tgi, is greater than or equal to 30 ° C, preferably greater than or equal to 50 ° C.
- Tgi is between 10 ° C and 100 ° C, preferably between 30 ° C and 100 ° C, even more preferably, Tgi is between 50 ° C and 100 ° C.
- the lowest Tg which can be denoted Tg2, is less than or equal to -10 ° C.
- Tg2 is between 0 ° C and -100 ° C, preferably between 0 ° C and -50 ° C, even more preferably, Tg2 is between 0 ° C and -20 ° C, and in particular between - 10 ° C and -20 ° C.
- the p ⁇ polymer particles included in the aqueous dispersion therefore have a rubbery character at the surface and a rigid character at their center.
- This dual nature makes it possible to obtain a residual binder with a good stiffness / flexibility compromise.
- the soft phase of the p ⁇ particles allows the formation of the binder film at lower temperatures and reduced demand for coalescing agents while the high Tg phase improves the hardness of the binder film.
- Said residual binder thus exhibits modulus values high, being less susceptible to fracture, while remaining rigid and suitable for urban or road surfaces considered. These module values vary little as a function of the outside temperature, the latter typically ranging from -40 ° C to 60 ° C.
- the mechanical properties of the mixes comprising said binder remain stable over a wide range of outside temperatures to which the mixes can be exposed during the year, in winter as in summer.
- the film-forming temperature of the binder is less than 5 ° C. A low film-forming temperature ensures good cohesion of the resulting mix.
- the particles of polymers p ⁇ included in the aqueous dispersion therefore comprise a polymer PI, having a Tgi, at their center and at least one other polymer P2, having a Tg2, at the surface of the particle p ⁇ , of so that the layers of polymers are in contact with one another, or even bonded to one another.
- the particles of the invention do not include a void or any material other than polymer.
- the particles of the invention consist of two polymers PI and P2 as defined above.
- the aqueous dispersion of polymers according to the present invention is obtained by emulsion polymerization in aqueous phase of at least two compositions of monomers M1 and M2 resulting respectively in polymers PI and P2.
- this aqueous phase emulsion polymerization can be carried out in a sequenced manner, or the M1 monomer is polymerized first and then the additives making it possible to initiate the M2 monomer are added to the medium. reaction, or the monomers M1 and M2 are each polymerized separately and then mixed.
- Said polymerization is carried out in the presence of at least one anionic surfactant.
- anionic surfactant makes it possible to improve the stability of the aqueous dispersion during polymerization and to effectively disperse the polymer particles.
- the anionic surfactant is moreover useful in the aqueous dispersion for the formation of a binder for road or urban asphalt.
- this anionic surfactant is chosen from fatty acid carboxylates, sulfates such as sodium dodecylsulfate, sulfonates such as sodium alkylbenzene sulfonates, alpha-olefin sulfonates, phosphates, sulfosuccinates and phospholipids .
- the anionic surfactant is present in the aqueous dispersion in a content of at least 0.2% by weight relative to the total weight of said dispersion, preferably between 0.2% and 5%.
- the polymerization can also take place in the presence of at least one nonionic surfactant, which does not ionize in water, in combination with at least one anionic surfactant as defined above. above.
- This nonionic surfactant can represent from 0.2% to 5%, and preferably from 0.2% to 0.5% of the total weight of the dispersion.
- This nonionic surfactant is for example selected from glycol esters such as ethylene glycol stearate, glycerol esters, sorbitan esters (Tween ®), esters of polyoxyethylene, fatty alcohol ethers and alkanolamides.
- the resulting aqueous polymer dispersion used in the present invention for the preparation of a binder for road or urban asphalt comprises at least one anionic surfactant as defined above.
- said aqueous dispersion also comprises at least one nonionic surfactant as defined above.
- the polymers included in the particles of the aqueous dispersion used for the preparation of a binder according to the present invention are advantageously obtained from compositions of monomers chosen from the group consisting of vinyl and / or diene monomers, esters comprising at least one polymerizable olefinic introduction, ethylenically unsaturated monomers bearing at least one acid and / or carboxylic anhydride function and combinations thereof.
- these monomers are chosen from styrene and its derivatives, comprising for example vinyltoluenes (ortho, meta, para), ⁇ -methylstyrene, isopropylstyrene, ferf-butylstyrene, para-butylstyrene, para-decylstyrene, para-chloro-styrene and also from butadiene, isoprene, (meth) acrylic esters, nitriles such as (meth) acrylonitrile, vinyl esters such as vinyl acetate, vinyl butyrate, vinyl caprolate, and vinyl pivalate, (meth) acrylic acid, itaconic acid, fumaric acid, maleic acid, crotonic acid, isocrotonic acid, vinylbenzoic acid, and combinations thereof.
- the formulation (meth) acryl * designates acryl * and methacryl *, * designating the suffix -ate or -ique.
- the (meth) acrylic esters are preferably selected from linear C1-10 alkyl (meth) acrylates, such as methyl (meth) acrylate, ethyl (meth) acrylate or butyl (meth) acrylate , branched C3-10 alkyl (meth) acrylates, 2-ethylhexyl acrylate, and combinations thereof.
- the monomers are chosen from styrene and (meth) acrylic esters such as linear C1-10 alkyl (meth) acrylates, branched C3-10 alkyl (meth) acrylates.
- the aqueous polymer dispersion used for the preparation of a binder as described above typically comprises a dry extract of between 30% and 70% by weight of polymers relative to the total weight of the dispersion, preferably between 40% and 60 %, more preferably between 45% and 55%.
- the p ⁇ particles of polymers, included in the aqueous dispersion comprising at least two polymers having distinct Tg's are structured so that a positive gradient of Tg is observed from the surface of the particles to the center of the particles.
- the p ⁇ particles of polymers structured so that a positive gradient of Tg is observed from the surface of the particles towards the center of the particles therefore comprise several layers of polymers, each layer having a distinct Tg.
- the Tg gradient between each polymer layer from the surface to the center of the particle is between 10 ° C and 200 ° C, preferably between 50 ° C and 100 ° C.
- the polymer particles can comprise more than two polymers, each polymer having a distinct Tg, so that the Tg of each polymer increases as one moves from the surface to the center of the particle.
- the particles p ⁇ with a gradient of Tg can comprise a polymer PI at the center of the particle surrounded by one or more intermediate layers of polymer included between the polymer PI and a layer of polymer P2 at the surface of the particle, the intermediate layers having Tg between Tgl and Tg2, so that the value of the Tg of each polymer layer increases when one goes from the layer of P2 to the layer of PI.
- the p ⁇ particles of polymers included in the aqueous dispersion are structured as core / shell particles.
- the core / shell particles according to the invention comprise a PI polymer at their center, exhibiting a Tgi as defined above, surrounded by at least one envelope consisting of a P2 polymer exhibiting a Tg2 such as as defined above.
- the aqueous polymer dispersion used for the preparation of a binder as described above may comprise p ⁇ particles of different polymers, that is to say p ⁇ particles based on different polymer compositions.
- each p ⁇ particle will include at least two polymers having distinct Tg's.
- the same dispersion may comprise p ⁇ particles consisting of polymers A and B, but also p ⁇ particles consisting of polymers C and D.
- the aqueous dispersion used for the preparation of a binder intended for the manufacture of a road or urban mix also comprises particles p2 of polymer having a single Tg in addition to the particles p ⁇ having at least two separate Tg as described above.
- these single Tg polymer particles p2 are prepared from a composition of monomers as described above.
- these unique Tg particles can consist of a single polymer.
- the particles p2 are obtained from (meth) acrylic esters.
- the Tg of these single Tg polymer particles p2 is less than 0 ° C.
- This variant of the invention makes it possible to improve the flexibility of the residual binder.
- the Tg of these single Tg polymer particles p2 can also be greater than 10 ° C. According to this variant of the invention, the residual binder is more rigid.
- the presence of particles of polymers p2 with a single Tg within the aqueous dispersion also comprising p ⁇ particles having at least two distinct Tg makes it possible to modulate the stiffness / flexibility ratio of the residual binder after coating of the mixes. This ratio can thus be adjusted as a function of the intended use of the mixes of the invention.
- the solids content of particles n2de polymers with a single Tg within the aqueous dispersion of polymer particles used for the preparation of a binder is between 0% and 60% relative to the total weight of the solids content of the particles.
- p ⁇ and p2 of polymer advantageously between 0% and 40%.
- the aqueous dispersion used for the preparation of a binder according to the present invention may comprise particles p2 with a single Tg obtained which are different.
- certain particles p2 could consist of a polymer A while other particles p2 also present within the aqueous dispersion could consist of a polymer B.
- the present invention relates to the use of an aqueous dispersion comprising p ⁇ particles of polymers based on at least two polymers exhibiting distinct Tg's, said particles being structured in the core / shell, mixed with polymer particles p2 having a unique Tg.
- the present invention relates to the use of an aqueous dispersion comprising p ⁇ particles of polymers based on at least two polymers exhibiting distinct Tg, said particles being structured with a gradient of Tg from the surface. at the center of the particle, in admixture with p2 polymer particles exhibiting a single Tg.
- a second subject of the invention relates to mixes comprising a granular fraction coated with a binder, said binder being based on an aqueous dispersion of particles as defined in the invention.
- the term “granular fraction” is understood to mean solid fractions, in particular solid mineral fractions, which can be used for the production of mixes in particular for road or urban construction, including in particular natural mineral aggregates (gravel, sand, fines) for example from quarries or gravel pits, recycling products such as asphalt aggregates, for example resulting from the recycling of materials recovered during repair of roads as well as surplus asphalt mixing plants, manufacturing scrap, "shingles” (from recycling roofing membranes), aggregates from recycling road materials including concrete, slags in particular slag, shale in particular bauxite or corundum, rubber powder from recycling tires in particular, artificial aggregates of any origin and from, for example, bottom ash from household waste incineration (MIOM), as well as their mixtures in all proportions.
- MIOM household waste incineration
- coated aggregates is understood to mean asphalt mixes (mixture of aggregates and binders) originating from the milling of asphalt layers, from the crushing of slabs extracted from asphalt pavements, pieces of asphalt slabs, waste from asphalt or asphalt production surplus (production surpluses are materials coated or partially coated in a plant resulting from transient phases of production). These and other recycling products can reach sizes up to 31.5mm.
- the aggregates according to the present invention are obtained from massive rocks or from alluvial deposits according to the conditions of use of the mix and are chosen with reference to the standard EN 13043 (March 2003).
- the calcareous or silico-calcareous materials are preferred for the formulation of the mixes according to the invention, without being limited thereto.
- the water content of the materials must be rigorously controlled below 3% by weight, relative to the total weight of the materials, so as not to have leaching during contact with the binder in the aqueous phase.
- the granular fraction advantageously comprises:
- the granular fraction advantageously comprises:
- - elements in particular chippings, having dimensions: . between 2 mm and 6 mm;
- mineral fines or “filler” is meant any mineral filler passing through a sieve with a square mesh of 0.063 mm side.
- the fines can be natural or filler fines, for example limestone fines (calcium carbonate), cement or hydrated lime, or recovered.
- the “granular fraction” is also designated by the terms “0 / D solid fraction”. This 0 / D solid fraction can be separated into several particle sizes: the 0 / d solid fraction and the d / D solid fractions.
- the “granular mineral fraction” is also denoted by the terms “0 / D mineral fraction”. This 0 / D mineral fraction can be separated into several particle sizes: the 0 / d mineral fraction and the d / D mineral fractions.
- the finest elements are those included in the range between 0 and a maximum diameter which can be set between 2 and 6mm (from 0/2 to 0/6), advantageously between
- solid fraction d / D advantageously the solid mineral fraction d / D.
- the solid fraction, in particular the solid mineral fraction advantageously constitutes 80% to 99%, more advantageously 90% to 98.5%, even more advantageously from 96.5% to 97.5% of the weight of the mix after curing ( complete evaporation of water).
- the mixes of the invention are light in color.
- the aggregates used in the mixes of the invention preferably have a significant luminescence L *, typically greater than 50. This property gives the coatings improved visibility day and night as well as great clarity.
- Luminescence is typically calculated according to standards NF EN 11664-1, NF EN 11664-2 and NF 11664-4, dated 07-01-2011.
- the binder based on the aqueous dispersion as described above has a film-forming temperature less than or equal to 10 ° C, preferably less than or equal to 5 ° C, even more preferably less than or equal to 1 ° vs.
- the whole of the granular fraction is coated using the binder based on the aqueous dispersion as defined above.
- the mixes according to the present invention can be obtained from the process comprising the following successive steps: a) Preparation of a granular fraction as described above,
- Step c) is carried out for a sufficient time to observe advanced rupture of the emulsion.
- the emulsion binder resulting from step b) comprises between 0.2% and 5% by weight of anionic surfactant as defined above relative to the total weight of the emulsion binder.
- the emulsion binder resulting from step b) can optionally comprise a nonionic surfactant as defined above in combination with at least one anionic surfactant.
- the nonionic surfactant represents between 0.2% and 5% by weight relative to the total weight of the binder in emulsion.
- the mix can also comprise a minor amount of hydraulic binder in combination with the binder based on the aqueous dispersion as described above.
- minimum amount is understood to mean that the content of residual hydraulic binder is less than or equal to 2% relative to the total weight of the mix, preferably less than 1%.
- said hydraulic binder is chosen from Portland cement, lime, milk of lime, magnesia, synthetic or natural calco-magnesian compounds such as dolomites, magnesian lime or dolomitic lime, silicate or carbonate cements. calcium and / or magnesium aluminates or any other hydraulic binder well known to those skilled in the art.
- hydraulic binder makes it possible to increase the rigidity of the final residual binder, and therefore of the resulting asphalt coating, according to the intended uses.
- the addition of hydraulic binder can also decrease the setting time of the asphalt, i.e. the time required for the water and possibly the solvents to evaporate (s) from the binder and for the asphalt is sufficiently consolidated and stable to be placed under traffic.
- the hydraulic binder can be introduced either during step c) of the above process, that is to say during the mixing of the various components of the mix, or beforehand in the granular fraction during step a) or to the binder in emulsion during step b) before coating, subject to the compatibility and the stability of the hydraulic binder in the aqueous polymer dispersion as defined above.
- the hydraulic binder is added during step a) to the granular fraction.
- the emulsion binder resulting from step b) comprises a dry extract of between 30% and 70% by weight of polymers relative to the total weight of the emulsion, preferably between 40% and 60%, more preferably between 45 % and 55%.
- the mixes according to the invention can comprise at least one additive, added either to the granular fraction during step a), or to the binder during step b), or to the mix, in other words during the mixing of the mixtures. aggregates and binder in step c).
- additives can, for example, be used for mechanical purposes, for rheological purposes, for adhesion purposes and / or for aesthetic purposes, in particular for a change of color of the final road products.
- this additive is selected from an inorganic or organic viscosifier, such as clays, or from fumed silicas, cellulosic or synthetic viscosifiers of the associative type such as HEUR (Urethane ethylene oxide modified hydrophobically, Hydrophobically modified Ethylene oxide URethane according to the appropriate acronym) / HMPE (High Modulus Polyethylene, High Modulus PolyEthylene) or HASE; or non-associative (ASE), an “anti-foam” additive, pigments, fibers or an emulsifier.
- HEUR Urethane ethylene oxide modified hydrophobically, Hydrophobically modified Ethylene oxide URethane according to the appropriate acronym
- HMPE High Modulus Polyethylene, High Modulus PolyEthylene
- HASE non-associative
- an “anti-foam” additive pigments, fibers or an emulsifier.
- HASE a hydrophobically modified soluble alkali emulsion, is understood to mean a carboxylated copolymer based on:
- ASE a soluble alkali emulsion
- carboxylated copolymer based on:
- the fibers are for example chosen from cellulosic fibers, polyacrylonitrile fibers, such as polyacrylonitrile fibers with a size of between 4 and 12 mm, and / or glass fibers.
- the fiber content advantageously varies from 0.05 to 0.5 pph (part percent by weight) / dry solid fraction, advantageously 0.05 to 0.5 pph (part percent by weight) / dry aggregates, preferably between 0 , 07 and 0.2 ppc.
- the addition of fibers makes it possible to limit sagging of the binder based on the aqueous dispersion and to improve the abrasion resistance at a young age of the resulting mix.
- the state of dryness of the solid fraction, in particular of the solid mineral fraction, water, known as feed water, can be added to the granular fraction during step a) of above process.
- the total water content by weight of the granular fraction resulting from step a), consisting of the input water and the water naturally present in the granular fraction, is between 1% and 6% by weight per relative to the total weight of the granular fraction, advantageously the water content is 4%.
- Step a) process for preparing the mixes may include optional drying of the granular fraction if the latter contains a water content greater than 6% by weight relative to the total weight of the granular fraction, in order to achieve a content in water of between 1 and 6%, advantageously of 4%.
- Coating step c) is preferably carried out cold.
- the term “cold coating” means that the granular fraction, in particular the aggregates, is not dried, and is mixed as it is, that is to say with its natural moisture (more an adjustment of the water content if necessary) and at room temperature.
- the binder then arrives in various forms, the most common being that of an emulsion which thus makes it possible to have a product that is not very viscous and therefore workable at room temperature.
- ambient temperature is understood to mean a temperature ranging from 15 ° C to 40 ° C.
- the mixes according to the present invention have a void content of less than 30%, preferably between 5% and 30%, even more preferably between 8% and 25%.
- the content of anhydrous residual binder after coating step c) is typically between 1% and 20% by weight relative to the total weight of the mix, preferably between 1.5% and 10% by weight, more preferably between 2.5% and 3.5% by weight.
- the amount of binder in the mix can be adjusted depending on the intended use of the mix.
- hydrocarbon mixes according to the invention are deposited by spreading, for example with a finisher or a grader, then compacted. These mixes allow a return to traffic of less than 72 hours, more advantageously within 24 hours after spreading.
- a final object of the present invention relates to a road or urban coating, comprising at least one coating layer according to the present invention.
- the coating according to the present invention is a clear pavement layer particularly suitable for low traffic lanes such as, for example, pedestrian lanes, cycle paths, squares, squares, playgrounds, sports fields and lanes. green.
- the coating of the invention also comprises a sealing layer over the coating layer (s), advantageously applied between 24 hours and 48 hours after the end of the use of the coated materials.
- the term “sealing layer” is understood to mean a layer of binder sprayed onto a pavement layer intended to fix the surface gravel (the rolling stones) and to improve its waterproofing. Indeed, the good level of cohesion of the mixes guarantees the absence of gravel and sand tearing.
- the sealing layer consists of an aqueous polymer dispersion comprising particles based on at least two polymers exhibiting distinct glass transition temperatures, polymer particles exhibiting a single glass transition temperature or mixtures thereof.
- it is a dispersion comprising particles of core / shell polymers or of polymer particles structured so that a gradient of Tg is observed as described in the present description or of polymer particles having a Tg single such as acrylic or styrene-acrylic polymer particles.
- the sealing layer is preferably applied at a dosage of 150 to 400 g / m 2 of residual binder.
- the present invention also relates to a process for preparing the coating of the invention under cold conditions, comprising the following steps:
- a ' cold preparation of the mixes of the invention by mixing the granular fraction, the binder and optionally at least one additive, according to steps a) -c) described above, b') spreading of the mixes in an ambient temperature, preferably between 5 ° C to 40 ° C, and at a degree of hygrometry which can range up to 100%,
- the modulus of the mixes of the invention and of the control mix are similar, while at higher temperatures (in particular 40 and 60 ° C), the modulus of the mixes based on a control binder decreases more sharply than that of the coated materials of the invention.
- the content of total residual anhydrous binder was set at 3.0 pph (or 2.9%) relative to the mass of the solid mineral fraction.
- the particle size curve of the solid mineral fraction is as follows for all the examples below:
- the binders tested are the polymer dispersions in aqueous phase having the following properties:
- the binders used in the examples are commercial binders from the company Celanese ® sold under the trade name Mowilith ® . They all include an anionic surfactant. Asphalt production
- the solid mineral fraction was introduced into a kneader, water was added to the mixture and then the binder in aqueous phase was introduced into the formulation. After 20 seconds of mixing, the asphalt is compacted using a Marshall® machine, then maturing for 14 days at 35 ° C. / 20% hygrometry is carried out.
- the mixes are then characterized by sinusoidal diametral compressions in order to obtain the phase angle, as well as the complex modulus of the mix as a function of temperature and frequency.
- a surface cohesion test of the Surface Cohesion test (TCS) type from standard NF EN 12274-5 can be carried out to estimate the resistance to surface tearing of the asphalt. This test is carried out after a cure time of the mix of 72 hours at 20 ° C. before immersion in water. The mass share of the asphalt is then evaluated as a percentage relative to the abrasion surface.
- TCS Surface Cohesion test
- Example 3 Formulation according to the invention n ° l
- a core-bark binder according to the invention was used for the formulation of clear cold mixes according to the following composition:
- the surface cohesion test was carried out using this formula after curing for 72 hours at 20 ° C.
- the abrasion losses on this formula are 52%.
- Example 4 Formulation according to the invention No. 2
- Another core-shell binder according to the invention was used for the formulation of clear cold mixes according to the following composition:
- Example 5 Formulation according to the invention No. 3
- a Tg gradient binder according to the invention was used for the formulation of clear cold mixes according to the following composition:
- a core-bark binder according to the invention was used for the formulation of clear cold mixes according to the following composition:
- the content of residual binder in this mix is therefore 2.4%.
- Test specimens of this coated material were prepared for the surface cohesion test by setting a ripening of 72 hours at 20 ° C. After 48 hours of ripening, certain test specimens were treated with a curing product (sealant) composed of Ll 1 diluted to 50% with water. The curing product was applied at 100, 150 and 200 g / m 2 of residual binder on the test piece and then the curing continued for up to 72 hours. The mixes were then evaluated according to the surface cohesion test and the results are shown below:
- Figure 1 illustrates the lower thermal susceptibility of the mixes formulated with binders of the invention (core-shell and Tg gradient) (see curves of triangles and circles) compared to mixes which are formulated from a binder homogeneous comprising only p2 particles with a single Tg (see curve of squares).
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Abstract
Description
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Application Number | Priority Date | Filing Date | Title |
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FR1904631A FR3095661B1 (en) | 2019-05-02 | 2019-05-02 | Use of an aqueous polymer dispersion for the manufacture of asphalt mixes |
PCT/FR2020/050733 WO2020221980A1 (en) | 2019-05-02 | 2020-04-30 | Use of an aqueous polymer dispersion for the production of coated macadams |
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