Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K9/00—Use of pretreated ingredients
  • C08K9/08—Ingredients agglomerated by treatment with a binding agent
• • 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
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/26—Macromolecular compounds or prepolymers
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/26—Macromolecular compounds or prepolymers
  • C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
  • C03C25/34—Condensation polymers of aldehydes, e.g. with phenols, ureas, melamines, amides or amines
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers

Definitions

• the invention relates to additives based on mineral fibers intended to improve the behavior of bitumen.
• Bitumens whether used to coat surfaces in order to make them waterproof in the case of terraces, to simply allow the rolling of vehicles on roads, or to form a layer permeable to the surface of the road water thanks to the technique of draining mixes, are not generally used in the pure state.
• European patent application EP-A-0 509 893 a process and a device for preparing bituminous mixes were described.
• the process included the following steps: a) drying, heating and mixing of the inert materials, b) formation of nodules by passing the mineral fibers through a plate with holes of 8 to 10 mm of average size so as to obtain at least 75% of the fibers with a length of less than 0.5 mm, c) continuous introduction of fibrous materials at a controlled rate into the stream of liquid bitumen to form a liquid binder before bringing it into contact with the inert materials, d) mixing the inert materials and of the charged liquid binder.
• a drying-heating and mixing step of the inert materials was provided, followed by the formation of nodules by passing the fibers through a plate with holes of 6 to 10 mm in average size so as to obtain at least 75 % of the fibers with a length of less than 0.5 mm, then a step of mixing bitumen with the inert materials to form a liquid mix and finally the continuous introduction of fibrous materials at a controlled rate into the liquid mix.
• the best results were obtained when the fibers had undergone, from their preparation, a coating with a non-primer ionic.
• This primer which is intended to facilitate the bonding of each individual fiber with the bitumen, is very different from the binders usually used to hold the fibers of an insulating mat of glass wool or rock wool together.
• the invention described here assumes the task of providing an additive to liquid bitumen that is easy to implement with various techniques commonly used on construction sites, that achieves results at least equivalent if n ' is better than those of the previous techniques and which is of a cost price as low as possible.
• the invention provides an additive of liquid bitumen based on mineral fibers, the fibers being before their introduction into the bitumen associated in nodules, the additive comprising a binder stable in water and in heat and having bitumen treated with fiber wetting agent.
• a binder in particular a binder which is stable to heat, and which remains a binder even in the bitumen in fusion and an agent which promotes the wetting of the fibers by the bitumen allows a setting particularly quick to use and particularly effective bitumen impregnation of fibers and fibrous nodules.
• the binder which is stable to water and to heat is based on phenolic resins of the type which are usually used to make the insulating fiber blankets, whether glass wool or wool. rock.
• the wetting agent is based on silicone resins. These, which are traditionally used to prevent wetting by water, surprisingly have an action which facilitates wetting of the fibers by bitumen.
• the invention provides that the bitumen additive is preferably constituted at most for 60% by weight by nodules with a dimension greater than 16 mm. Beyond these dimensions, the mixing and impregnation of the nodules with the bitumen becomes difficult and unusable industrially.
• the invention also provides a process for preparing the additive of the invention in which the following steps are carried out successively: a) the fibers are taken from a mattress of bonded mineral fibers of the type intended for the insulation, b) a resin is sprayed on the fibers which acts as a wetting agent for bitumen, c) the fibers are treated in a nodulator. Operation b is actually either before or after operation c.
• the spraying of a resin which acts as a wetting agent. for bitumen is extremely simple.
• the wetting agent on the bitumen is based on silicone.
• the invention also relates to the application of the bitumen additive to the manufacture of a bitumen-based mixture in which the nodules of mineral fibers are transported and distributed in the bitumen pneumatically.
• This pneumatic transport technique is very advantageous because it allows a regular distribution of the nodules within the liquid bitumen.
• the invention also relates to the application of the additive to the manufacture of a bitumen in which the mineral fiber nodules consist at most of 30% by weight of nodules of dimension greater than 16 mm and where they are first tablets and conditioned for their storage before being introduced in compressed form into the apparatus for preparing the bituminous mixture. Preferably, before their introduction, they have been compressed up to a density included. between 100 and 300 kg / m 3 .
• the figure shows the histograms of four samples of nodules according to the invention.
• the principle of the invention is as follows:
• nodules which are aggregates of mineral fibers of a certain dimension and the fibers of which remain bonded when the nodules are impregnated with bitumen.
• This characteristic allows bitumen reinforced by fibers to have new properties compared to those which are known from unbound nodules.
• binder according to the invention is permanent is its resistance to water. Indeed, it is common on construction sites where bitumen has been prepared to be spread on the roads, that it is necessary to wait, in the event of rain, until dry weather has returned to be able to proceed when spreading the bituminous complex. In this case, the mixture can be subjected for quite long periods to the action of water. Nor is there any question that the binder could be destroyed by it.
• Another characteristic to be given to the nodules of the invention is an ability to be completely impregnated with the liquid bitumen as such. They indeed constitute a whole where the bitumen has difficulties to penetrate. This is why the inventors have o studied the agents likely to facilitate the penetration of bitumen inside the fibrous network. After a prolonged study they defined the characteristics which this agent had to respect.
• the preferred variant of the invention is that which uses as binder stable to water and heat phenolic resins of the Bakelite type and as bitumen wetting agent of silicone resins.
• silicone resins which are especially used in practice to avoid wetting by liquid water are precisely an agent which promotes wetting by bitumen. But this is nevertheless what the inventors have observed.
• the nature of the mineral fiber matter Whether it is glass fibers or rock fibers, both are suitable, their diameter and length also matter little.
• the fineness of the mineral fibers is determined by specific sizes used by those skilled in the art in these industries; this is how glass fibers have a fineness which is characterized by their "micronaire” while rock fibers have a fineness which is characterized by their "fasonaire”.
• the nodules of the invention use fibers which are most commonly used in the industry for producing insulation panels by the usual centrifugation techniques, that is to say that for glass fibers all fibers are suitable. which have a micronaire of between 2 and 5 under 5 grams and that for rock fibers are suitable fibers which have a fascia equal to or greater than 140.
• a particularly advantageous way of obtaining nodules in accordance with the invention is to use as raw material for making them insulation panels fitted with their usual binder and stripped of all their facings or surface equipment so that only remains fibers with their binder.
• Most common insulation panels are suitable, especially those with a density less than 100 kg / m and a proportion of binder (phenolic resin) of between 2 and 8%.
• This machine produces fragments of bound fibers with a dimension of the order of 2 to 10 cm. The fragments are then introduced into a lump.
• This device is the same as that described in European patent application EP-A-0 455 553. It has an inlet nozzle and an outlet nozzle, the upstream space is separated from the downstream space by a sheet metal wall pierced with holes.
• This sheet has the shape of a cylinder which is coaxial with a rotary drum which carries knives whose cutting edge is slightly inclined relative to the common axis. There are also fixed knives which extend the cylinder with holes.
• the material which enters through a first nozzle on the concave side of the grid is pressed on it by the movable knives and it can thus penetrate through the holes by being calibrated and producing on the other side of the grid enough nodules regular.
• the machine which has just been described is one of the means which make it possible to obtain nodules, not a single size even with holes of identical diameter in the grid, but a distribution of nodules of different sizes. This distribution does not only depend on the size of the holes in the grid, in fact, the size of the nodules depends on a certain number of other parameters, in particular on the original characteristics of the fibers such as their micronaire or their fasonaire, the pressure exerted at the entrance to the grid, the speed of rotation of the drum.
• a population of nodules is characterized by the histogram of its dimensions.
• a particle size determination technique is used.
• a sieving system is used with superimposed sieves which have an increasingly reduced mesh size from top to bottom. These sieves are agitated in two movements, a rotary movement in their plane on the one hand, and on the other share a vertical shock at a fairly high frequency since the shocks follow one another at 150 per minute.
• the sieves are circular, with an internal diameter of 200 mm, their height is 55 mm with the exception of the coarsest sieve which has a height of 85 mm. All the sieves are covered with a cover.
• All these sieves correspond to the French standard AFNOR NFX 1 1-501. They are installed on an electric sieve shaker of the STEIN and ROUBAIX establishments of the RO-TAP type.
• the upper sieve has a mesh size of 20 mm, the second of 16 mm, the third of 10 mm, the fourth of 6.3 mm, the fifth of 4 mm.
• At the bottom of the sieve stack is a bottom that collects what has managed to pass through the 4 mm mesh. There is also a precise centigram balance. The procedure is as follows:
• the figure shows the histograms corresponding to four samples of nodules prepared under various conditions, the nodulator was a ROTOPLEX 63/100 knife mill from the company ALPINE.
• the diameters of the nodules in millimeters On the left of the abscissa axis, ">20" means that a certain percentage of nodules (noted on the ordinate axis) had a diameter greater than 20, that is to say that the nodules in question do not not pass through the grid, the mesh of which was 20 mm.
• the histogram 1 has 70% of its nodules which remain above the 20 mm grid.
• This same family of nodules had 75% by mass of the nodules which crossed neither the grid of 20, nor the grid of 16 mm and 90% which did not cross either the grid of 20, neither the grid of 16, nor the grid of 10 mm.
• Curve 1 the nodules of which have diameters greater than 20 mm for 70% of their mass, corresponds to flows of 6 tonnes per day with a grid with a diameter of 8 mm. Another test made it possible to obtain exactly the same result with a completely different flow rate of 27 tonnes per day but with a diameter of the grid holes of 12 mm.
• Curve 2 was obtained with a flow of 12 tonnes per day and a grid with 8 mm holes and curves 3 and 4 with an identical grid 8 mm and a flow of
• the first method corresponded to that of FIG. 1 of document EP-A-0 509 893.
• This technique is clearly more tolerant than the second which is an earlier technique, that which consisted in introducing in the middle of the rotating drum bags of compressed nodules which disperse in the middle of the aggregates before being themselves, in turn, covered liquid bitumen.
• This second method which does not require the equipment for pneumatic projection of the nodules, does not guarantee the same good dispersion of the nodules in the bitumen. It is therefore more demanding in terms of the quality of the nodules.
• the histogram 4 and the histogram 3 correspond to nodules which can be implemented by the two techniques.
• curve 2 corresponds to a family of nodules which can only be implemented by the blowing machine.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Medicinal Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Polymers & Plastics (AREA)
• Health & Medical Sciences (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• General Life Sciences & Earth Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Nonwoven Fabrics (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Surface Treatment Of Glass Fibres Or Filaments (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

Country Status (17)

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Family Cites Families (5)

• 1996
  • 1996-07-24 FR FR9609282A patent/FR2751639B1/fr not_active Expired - Fee Related
• 1997
  • 1997-07-15 AR ARP970103157A patent/AR007881A1/es unknown
  • 1997-07-17 WO PCT/FR1997/001329 patent/WO1998003592A1/fr not_active Ceased
  • 1997-07-17 TR TR1999/00202T patent/TR199900202T2/xx unknown
  • 1997-07-17 CN CN97198136A patent/CN1233272A/zh active Pending
  • 1997-07-17 IL IL12819297A patent/IL128192A0/xx unknown
  • 1997-07-17 EP EP97934582A patent/EP0914382A1/de not_active Withdrawn
  • 1997-07-17 KR KR1019997000550A patent/KR20000068001A/ko not_active Withdrawn
  • 1997-07-17 AU AU37738/97A patent/AU3773897A/en not_active Abandoned
  • 1997-07-17 PL PL97331319A patent/PL331319A1/xx unknown
  • 1997-07-17 JP JP10506639A patent/JP2000514860A/ja active Pending
  • 1997-07-17 BR BR9710760A patent/BR9710760A/pt unknown
  • 1997-07-17 CA CA002261844A patent/CA2261844A1/fr not_active Abandoned
  • 1997-07-17 SK SK100-99A patent/SK10099A3/sk unknown
  • 1997-07-24 ZA ZA9705105A patent/ZA975105B/xx unknown
• 1999
  • 1999-01-22 NO NO990297A patent/NO990297L/no not_active Application Discontinuation
  • 1999-02-04 BG BG103147A patent/BG103147A/xx unknown

Non-Patent Citations (1)

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