EP0228400A1 - Composition a base de bitume et d'elastomeres et son application a l'amortissement des vibrations - Google Patents

Composition a base de bitume et d'elastomeres et son application a l'amortissement des vibrations

Info

Publication number
EP0228400A1
EP0228400A1 EP19860903463 EP86903463A EP0228400A1 EP 0228400 A1 EP0228400 A1 EP 0228400A1 EP 19860903463 EP19860903463 EP 19860903463 EP 86903463 A EP86903463 A EP 86903463A EP 0228400 A1 EP0228400 A1 EP 0228400A1
Authority
EP
European Patent Office
Prior art keywords
elastomerlc
bitumen
composition according
bituminous composition
polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19860903463
Other languages
German (de)
English (en)
Inventor
Bruno Lapabe-Goastat
Christian Pillot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Francaise Des Petroles Bp Ste
IFP Energies Nouvelles IFPEN
BP PLC
Original Assignee
Francaise Des Petroles Bp Ste
IFP Energies Nouvelles IFPEN
BP PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Francaise Des Petroles Bp Ste, IFP Energies Nouvelles IFPEN, BP PLC filed Critical Francaise Des Petroles Bp Ste
Publication of EP0228400A1 publication Critical patent/EP0228400A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch

Definitions

  • the present Invention relates to vibration damping compositions based on bitumen and an elastomer and to a process for the preparation of such a composition, and its use in sound damping structures. It is known that polymers may be dissolved or dispersed in a bitumen to modify its physical properties in a manner appropriate to its application, for example, in damping vibrations.
  • French Patent No. 7418124 discloses a soundproofing material consisting essentially of a bitumen, polystyrene and a mineral charge employed as a visco-ela ⁇ tic damping material.
  • Visco-elastic damping compositions may be employed in the form of simple or stressed coatings.
  • a layer of visco-elastic material is distributed over the surface of a structure to which it is strongly bound.
  • the visco-elastic material is subjected to tensional stresses and part of the energy exerted is dissipated, the greatest dissipation being obtained where the visco-elastic layer is thin, and has a high intrinsic coefficient and a high Young's modulus.
  • stressed or "sandwich" coatings a visco-elastic layer is interposed between two elastic layers such as steel or aluminium.
  • the visco-elastic material is subjected to a strong shearing stress. Good damping is achieved by optimisation of the dimensions of the sandwich, and by using a visco-elastic material with a high intrinsic damping coefficient and a Young's modulus of between 10 ⁇ and l ⁇ 8N/m .
  • the visco-elastic materials used for vibration damping should have good mechanical resistance, that Is, a high rigidity modulus and a high angle of loss. It is also desirable that a composite formed from a damping sheet of the visco-elastic material which is covered on one surface by an elastic protective layer (known as the stressing layer), for example, a steel plate or an aluminium film, should have a high damping coefficient.
  • an elastic protective layer for example, a steel plate or an aluminium film
  • an elastomerlc bituminous composition comprising 70 to 95 per cent by weight of a high penetration index bitumen, the value of this index being between +1 and +7, and 5 to 30 per cent by weight of an elastomerlc polymer.
  • the invention also relates to a process for the preparation of such a product and the use of this composition in sound damping structures.
  • the penetration index of a bitumen may be found by measuring the penetration values of the bitumen at various tempertures. It is a function of the bitumen's temperature susceptibility since it is characteristic of the logarithmic curve of penetration in terms of the logarithm of temperature. Its value is given by the formula: log Pi - log P2 1 x 20 - PI
  • the high penetration index bitumens used in the present invention may be obtained by oxidation in the presence of a catalyst of a residue obtained by a distillation at atmospheric pressure of a crude oil or a vacuum distillation residue of a crude oil, or a mixture of these two residues.
  • the high penetration index bitumens have a penetration at 25°C of between 100 and 250 tenths of a millimetre, and more preferably between 140 and 200 tenths of a millimetre.
  • Such bitumens may be produced according to the processes described in French Patent 1264615.
  • the elastomerlc polymer is an elastomerlc block copolymer, more preferably consisting of styrene and a conjugated dlene.
  • the most preferred elastomerlc polymer is a styrene/butadiene/styrene block copolymer, the branched form of polymer being particularly preferred.
  • the composition may also contain, especially in the case of use In the simple damping technique, a minor amount by weight of a filler.
  • a filler of the laminar mica(vermiculite) type together with calcium carbonate (spherical filler) to improve the rigidity modulus of the damping material without having too harmful an effect on the intrinsic damping qualities of the bitumen/polymer association.
  • compositions according to the invention may be prepared by dissolving or dispersing the polymer in the high penetration index bitumen at a temperature in the range 180°C to 250°C, preferably at a temperature as close as possible to 200°C without exceeding this figure, to prevent deterioration of the qualities of the composite.
  • the mixing times typically used are between 1 and 3 hours, preferably in the order of 2 hours.
  • the compactness of the mixture thus prepared may be increased by calendering, but it is also possible to cast plates of this mixture direct on to a stressing layer so forming a composite.
  • the composite product may occur in the form of a damping sheet of the elastomerlc bituminous composition covered on one surface by a protective layer known as the stressing layer, and on the other surface by a release paper, or by a double-sided adhesive paper which facilitates the application of the composite to the metal structure to be damped, although this is not essential, since the bitumen/elastomeric polymer mixture is self-adhesive.
  • the release paper may also be replaced by a thermoplastic film such as for example polyethylene film, which facilitates stacking and despatch of the material through the elimination of sticking.
  • Example 1 illustrates the improved performance of the mechanical properties over a wide temperature range of the composition according to the present invention compared with a bitumen/polymer mix using the same polymer, but where the bitumen used is not of high penetration index.
  • Example 1 illustrates the improved performance of the mechanical properties over a wide temperature range of the composition according to the present invention compared with a bitumen/polymer mix using the same polymer, but where the bitumen used is not of high penetration index.
  • HPI bitumen A mixture of high penetration index (HPI) bitumen with a styrene/butadiene/styrene block copolymer was prepared.
  • the HPI bitumen was prepared by feeding a 50:50 mixture of a residue obtained by distillation at atmospheric pressure of a crude oil and a residue obtained by distillation in vacuo of this oil, into a blowing tower with a capacity of 1.5 kg, at a temperature of 240°C, and oxidising the mixture by injecting air into the tower with a throughput of 410 litres per hour for three hours, 10 minutes, in the presence of an acid catalyst of the orthophosphoric acid type present in an amount from 2.5 to 3 per cent by weight of the total amount of residue.
  • the penetration of the mixture of residues before oxidation was approximately 400 tenths of a millimetre at 25°C.
  • bitumen After oxidation a high penetration index bitumen with a penetration of 190 tenths of a millimetre at 25°C and a softening point of 57°C was obtained.
  • the penetration values of this bitumen were measured at various temperatures, the penetration index of the bitumen was found to be +1.6, which is characteristic of a bitumen with low sensitivity to temperature variations.
  • the high penetration index bitumen obtained in this way was mixed at 200°C with a styrene/butadiene/styrene block copolymer in the ratio 92:8 for 2 hours.
  • the styrene/butadiene/styrene block copolymer which was used is marketed by Shell Chimie (TR 1184) and has the following characteristics:-
  • the final bitumen/polymer composition had a softening point of 125°C and a penetration of 60 tenths of a millimetre.
  • a stressed coating was formed by casting the final bitumen/polymer composition onto a steel plate 1 mm thick, representing the structure to be damped in such a way that the thickness of the bitumen/polymer visco-elastic composition was 1.5 mm.
  • a steel stressing layer 0.6 mm thick was then bonded to the visco-elastic layer to complete the composite.
  • the visco-elastic mixture was subjected to heat and cold resistance tests.
  • the rigidity modulus, E', and the angle of loss, tga were determined at three different temperatures, at the same frequency. d.
  • the damping coefficient, Tj of the composite formed as above was determined at three different temperatures. The following results were obtained. a. Flow at 100°C » 2 ma in 24 hours. b. Limit of pliability of the polymer/bitumen mixture » -25*C. c. Visco-elastic properties of the polymer/bitumen mixture at f - 62.5 Hz.
  • a mixture of a classic bitumen with a styrene/butadiene/styrene block copolymer (as used in Example 1) was prepared.
  • the direct distillation bitumen used had a penetration of 188 tenths of a millimetre at 25°C and a softening point of 36°C, and a penetration index of -1.1.
  • This bitumen was mixed at 200°C with the styrene/butadiene/styrene block copolymer In the ratio 86:14, for two hours.
  • the final bitumen/polymer composition had a softening point of 125°C and a penetration of 70 tenths of a millimetre.
  • a stressed coating was formed by casting the bitumen/polymer composition onto a steel plate 1 mm thick, representing the structure to the damped, in such a way that the thickness of the bitumen/polymer visco-elastic composition was 1.5 mm.
  • a steel stressing layer 0.6 mm thick was then bonded to the visco-elastic layer to complete the composite.
  • Tests (a), (b), (c) and (d) carried out for the composition according to the present invention in Example 1 above were carried out on the comparative visco-elastic bitumen/polymer mixture and the composite formed from it.
  • the rigidity modulus of the composition decreases rapidly as the temperature increase, and the damping of the composite becomes inadequate in cold conditions.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)

Abstract

Une composition bitumineuse élastomère ayant des propriétés d'amortissement des vibrations comprend entre 70 et 95% en poids de bitume ayant un indice de pénétration entre +1 et +7, et de 5 à 30% en poids d'un élastomère, par exemple un copolymère en bloc de styrène/butadiène/styrène. De préférence le bitume possède une pénétration à 25oC comprise entre 100 et 250 dixièmes d'un millimètre, mieux encore entre 140 et 200 dixièmes d'un millimètre. Le bitume peut être obtenu par oxydation en présence d'un catalyseur d'un résidu de distillation atmosphérique, ou un résidu de distillation sous vide, de pétrole brut ou un mélange des deux, le catalyseur préféré étant l'acide orthophosphorique. La composition est préparée en dissolvant ou dispersant le polymère dans le bitumeà une température de l'ordre de 180 à 250oC. La composition peut être utilisée dans des structures d'amortissement du son.
EP19860903463 1985-05-15 1986-05-15 Composition a base de bitume et d'elastomeres et son application a l'amortissement des vibrations Withdrawn EP0228400A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8507440 1985-05-15
FR8507440A FR2582010B1 (fr) 1985-05-15 1985-05-15 Composition a base de bitume et d'elastomeres et leur application a l'amortissement des vibrations

Publications (1)

Publication Number Publication Date
EP0228400A1 true EP0228400A1 (fr) 1987-07-15

Family

ID=9319343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860903463 Withdrawn EP0228400A1 (fr) 1985-05-15 1986-05-15 Composition a base de bitume et d'elastomeres et son application a l'amortissement des vibrations

Country Status (4)

Country Link
EP (1) EP0228400A1 (fr)
JP (1) JPS62502854A (fr)
FR (1) FR2582010B1 (fr)
WO (1) WO1986006736A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324758A (en) * 1988-08-11 1994-06-28 Sohwa Shell Sekiyu Kabushiki Kaisha Vibration damping material of asphalt cement
JP2607383B2 (ja) * 1988-08-11 1997-05-07 昭和シェル石油株式会社 アスフアルト系振動減衰材料
IT1241153B (it) * 1990-05-18 1993-12-29 Euron Metodo per preparare miscele stabili bitume-polimero
CA2089598C (fr) * 1992-03-05 2001-02-06 Martin L. Gorbaty Nouvelles compositions de bitane oxyde et modifie par polymere et methodes de preparation connexes
BE1007336A3 (fr) * 1993-07-29 1995-05-23 Fina Research Compositions bitumineuses pour materiaux d'insonorisation.
HRP970258B1 (en) * 1996-05-20 2002-04-30 Shell Int Research Process for preparing bitumen compositions
ZA977299B (en) * 1996-08-16 1998-03-23 Shell Int Research Bituminous composition.
US6120913A (en) * 1998-04-23 2000-09-19 Shell Oil Company Bituminous composition for shingles
FR2813324B1 (fr) 2000-08-30 2004-08-27 Entpr Jean Lefebvre Complexe multicouche viscoelastique antivibratoire pour voirie
EP2474971A1 (fr) * 2010-12-16 2012-07-11 Autoneum Management AG Matériau amortisseur à couche contrainte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1334685A (fr) * 1961-09-21 1963-08-09 Supra Chemicals And Paints Ltd Perfectionnements aux matériaux utilisés notamment pour l'insonorisation et le scellement
GB1221948A (en) * 1967-03-03 1971-02-10 Bostik Ltd Improvements in or relating to sound-deadening material
FR2067567A5 (en) * 1969-11-07 1971-08-20 Siplast Soc Nouvelle Rubber/bitumen sealing sheets having a high - elasticity
GB1474935A (en) * 1975-04-04 1977-05-25 British Petroleum Co Sound insulating composition
FR2307018A1 (fr) * 1975-04-09 1976-11-05 Anvar Nouveaux materiaux antivibratoires
GB1550616A (en) * 1975-08-05 1979-08-15 British Petroleum Co Vibration damping device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8606736A1 *

Also Published As

Publication number Publication date
FR2582010B1 (fr) 1987-09-18
FR2582010A1 (fr) 1986-11-21
JPS62502854A (ja) 1987-11-12
WO1986006736A1 (fr) 1986-11-20

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Inventor name: LAPABE-GOASTAT, BRUNO

Inventor name: PILLOT, CHRISTIAN