FR2594070A1 - DEFORMABLE COMPOSITE MATERIAL FOR RECOVERY IN THE BUILDING INDUSTRY - Google Patents

Abstract

Cover material. The polyisobutylene substrate 2 forms a non-sticky mass and the reinforcing element is an expanded metal grid 3 embedded in the substrate 2. Building industry. (CF DRAWING IN BOPI)

Description

Plastically deformable covering material.

  The invention relates to a covering material

  prefabricated sheet, strip or

  web, comprising an extensively reinforcing element

  It is suitable for use in the interior of a polyisobutylene substrate and may optionally contain conventional additives such as antioxidants, ultraviolet absorbers, chromophore pigments, mineral fillers and the like. A covering material of this type can be used mainly for covering and sealing purposes

  in the building, especially when striving to obtain

  watertightness on a support of

irregularity.

  Such a covering material is known from the patent of the Federal Republic of Germany

  29 22 242. The known material forms a sheet of water

  waterproof and flexible, with at least one

  bitumen layer (substrate) modified by a proportion

  rubber and a reinforcing element in

  synthetic fibers connected to each other. By-

  The fibers include, for example, polyamide (nylon) fibers, polyester fibers. The material

  mesh thus formed must have a large

  100% or more in all directions.

  tions. The proportion of rubber of the known substrate can represent from 95 to 30% of the weight of the total mass and be for example of polyisobutylene. But a certain bitumen content is necessary to ensure the affinity to a waterproof bituminous support. It is known that the deformability of leaves containing bitumen is very dependent on the temperature

  and lowers rapidly to fairly low temperatures.

  At fairly high temperatures, the masses contained

  asphalt are sticky. The cover sheet

  The known fabric is cut to a certain size in order to cover a given support which is not flat and is then applied manually without cutting or folding on the support, using any usual adhesive such as hot bitumen.

or bituminous cement.

  In addition, the patent of the Republic

  Federal Republic of Germany 22 25 358, a material from

  prefabricated sheet or bank covering

  comprising a cover layer of a composition

  bitumen and rubber with a non-sticky surface on one side, and a layer of bitumen and adhesive tape on the other side. A reinforcing layer is incorporated in one of the layers or interposed between the layers. This reinforcing layer may consist for example of a

  expanded or perforated metal layer. Composites

  Suitable bitumen compositions generally have a softening point of 70 to 195 ° C, which limits the deformability at the low temperatures of the material.

known recovery.

  For the two known covering materials, it is obviously necessary to resort to an agent

  adhesive (already present initially or subsequently deposited

  ), so that the cover material

  ve, after deformation and adaptation to a support that is not plane, the particular form that has been chosen. For a reinforcing element in the form of a highly extensible fiber mesh product, a high elastic recovery force is also expected. On the other hand, the present invention aims to improve a covering material of the type

  mentioned at the beginning of this memo-

  by the patent of the Federal Republic of Germany

  29 22 242), so as to be able to deform it

  by hand, even at low temperatures and able to adapt to complex shapes

  three-dimensional, while retaining in a large

  measuring the form given to it without the se-

  course of any adhesive agent whatsoever, and especially without it being tacky at least on its outer surface in the temperature range

  applicable to the technique of use.

  Starting from a covering material

  form of a sheet, band or tablecloth, having the

  features mentioned above, this problem is

  according to the invention, by the fact that

  Polyisobutylene treatment forms a non-sticky mass

  within the temperature range applicable to the

  of use, and the fact that the element of

  reinforcement is an expanded metal grid drowned-

  in the substrate which, following the longitudinal direction,

  dinal, an extensibility of 50 to 150%, in the transverse direction, an extensibility less than or equal to 20%, and a lower elastic recovery

or equal to 5%.

  Preferably, the expanded metal grid is

  in a stainless metal and in particular aluminum.

  As the substrate of the covering material according to the invention forms, as a whole, a mass

25940? 0

  non-tacky in the applicable temperature range

  the technique of use, we are sure that this subs-

  Trat always has a non-sticky surface.

  As used, according to the invention, as a reinforcing element, an expanded metal grid embedded in the substrate, having the indicated properties of extensibility and elastic recovery, the covering material is certainly relatively highly stiffened but it may, however, be plastically deformed

  low temperatures by hand, so without the help of ad-

  foreign giants and it can be adapted to complex three-dimensional forms. Due to the ability of the expanded metal grid to absorb pressure, an almost purely plastic behavior is obtained.

  so that an adaptation to three-dimensional shapes

  complex is possible by simple pressure, without excessive elongation. Any excessive elongation of the substrate is excluded due to its expanded metal reinforcement. Even for a strong extension, the layer of the substrate is hardly weakened or even cracked, so that a waterproofness of the covering material according to the invention is ensured at the places to be covered over or under.

  The cover material according to the invention

  tion is explained in a more precise way in

  means of preferred embodiments, with reference

  in the drawings in which: FIG. 1 is an exploded schematic representation in cross-section of the substrate;

  and the reinforcing element of a material of

cover according to the invention;

  FIG. 2 shows the coating material

  only one can obtain from the substrate and the reinforcing element according to Figure 1; Figure 3 is an exploded representation

  - schematically in cross-section -

  of another embodiment of the cover material according to the invention having two initially separated substrate layers;

  FIG. 4 shows the coating material

  that can be obtained from the constitutions

  killing of Figure 3; FIG. 5 is a plan view of a portion

  undeformed expanded metal grid of a material

  covering material according to the invention; Figure 6 is a plan view of a portion of the expanded metal grid according to Figure 5, after stretching in the longitudinal direction in the direction of the arrows; and

  FIG. 7 represents an example of an application

  of a covering material according to the invention

on an inclined roof.

  The covering material 1 consists essentially of a substrate 2 and a expanded metal grid 3 serving as reinforcing element. The substrate 2, whose upper face is indicated by 4 and whose bottom face is indicated by 5, consists of a mass which, as a whole, is not tacky and has surfaces which are not tacky. The substrate mass is preferably a mixture of various polyisobutylenes

  (GDP) which differ in their degree of polymerisation

  tion. These polyisobutylenes can be mixed

  to usual additives, such as anti-oxy-

  ultraviolet absorbers, chromophoric pigments, mineral fillers and the like. The substrate in

  polyisobutylene preferably has a resistance

  tensile strength of 10 N / mm or less and superior extensibility (elongation at break) or

equal to 50%.

  Among the antioxidants that are suitable

  Examples of such "radical scavengers" include conventional multi-alkylated phenolics, substituted naphthylamine compounds, and the like. It is expected

  preferably, non-chromophore antioxidants.

  Among the agents that absorb ultraviolet radiation

  Purples include, for example, selected types of soot, finely divided titanium dioxide, mixtures of soot and titanium dioxide, and the like. Ultraviolet absorbing agents which are preferably not

are not chromophores.

  Suitable pigments include, for example, zinc white, titanium white and

  known chromophoric pigments. It is planned,

  chromophore pigments.

  Suitable fillers include, for example, calcium carbonate, for example in the form of amorphous chalk which is not applied in the form of a coating, dioxide

  silicon, for example in the form of silicone gel

  this or diatomaceous earth, calcite, titanium dioxide, shale powder or kaolin, talc, etc. Amorphous chalk which is not

  applied in the form of a coating.

  In a preferred embodiment, the subset

  The polyisobutylene feed is a mixture of the following materials, namely: parts by weight of polyisobutylene having an average molecular weight of about 1.3 x 106; from 50 to 100 and especially from 50 to 80 parts by weight of polyisobutylene having an average molecular weight of approximately 0.4 x 106; from 1 to 4 and more preferably from 1 to 2 parts by weight of non-chromophore antioxidant; from 1 to 4 parts by weight of an ultraviolet absorbing agent and which is not chromophoric; from 20 to 60 parts by weight of pigment; from 100 to 300 parts by weight of filler. As reinforcing elements, in the covering material 1 according to the invention, an expanded metal grid having a extensibility in the longitudinal direction of 50 to 150% is used.

  extensibility along the transverse direction

  20% or more and an elastic recovery of less than

  less than or equal to 5%. The extensibility mentioned

  respond to what is known as elongation at the rup-

  ture. Thanks to the weak elastic recovery of simple

  5% or less than 5%, the metal grid de-

  fold, to a large extent, retains the shape it has taken under the effect of prior deformation and extension. Preferably, provision is made

  an expanded metal grid polished at the rolling mill in

  stainless steel, especially aluminum. This expanded metal grid 3 can, depending on the desired extensibility, have a thickness of 0.2 to 0.8 mm, a mesh length of 3 to 12 mm and / or a mesh width of 2 to 8 mm. This expanded metal grille 3

  immobilized thus by present construction, of pre-

  a tensile strength according to the direc-

  longitudinally, from 10 to 80 N / cm and resistance

  traction in the transverse direction

less than or equal to 100 N / cm.

  Three possibilities are explained below.

  different manufacturing capacities of the coating material

  According to the invention, by means of FIGS. 1 and 2, as well as 3 and 4. This covering material may already be prefabricated at the manufacturer's premises in sheet, web or web form. Delivery to

  consumer can be in the form of rolls.

  For manufacture, the individual constituents, at

  know the substrate in one or two layers and the grill

  expanded metal, are prefabricated first, that is,

  ie are made available in the form of piles or rollers. The substrate forming mass 2 can be provided in the form of a sheet having a thickness of about 1 to 2 mm, which substantially corresponds to the preferred thickness of the substrate on the finished overlay material. In the embodiment shown in FIG. 3, two prefabricated forms can first be made available in prefabricated form.

  sheets 2/1 and 2/2 of 0.6 to 1.2 mm thickness

  forming the substrate 2. Preferably, the two sheets 2/1 and 2/2 are in the same composition of

  substrate and have substantially the same thickness.

  For the manufacture of the covering material

  1 shown in Figure 1, it is possible to

  together, in a suitable device, the two sheets

  2/1 and 2/2 of the substrate and between them the expanded metal grid 3 according to the arrangement according to Figure 3- and then press them together, the

  expanded metal grill 3 being sandwiched between

  the two substrate sheets 2/1 and 2/2 and their adjoining layers being interconnected by pressing through the meshes of the metal grid

deployed 3.

  Alternatively, the covering material shown in FIG. 4 can be obtained by covering the expanded metal grid directly from the mass of the substrate 2 by extrusion in a device which

  includes a wide slot nozzle arranged transversally

to an extruder.

  To prepare the covering material shown in FIG. 2, the single substrate sheet 2 and the expanded metal grid 3 prepared in advance, preferably polished by rolling, can be assembled in one device.

  then incorporate by rolling the metal grate de-

  bent to the mass of the substrate sheet 2.

  By this manufacturing process, we obtain the

  covering material 1 in ready-to-use form.

  It then preferably has a tensile strength in the longitudinal direction less than or equal to

  at 80 N / cm and in the upper transverse direction

  less than or equal to 200 N / cm. In the ready-to-use state, the extensibility in the longitudinal direction is 50 to 150% and in the transverse direction,

  it is less than or equal to 20%. The elastic recovery

  tick of the overlay material is, in the ready state

  at use, preferably less than 5%.

  In Figure 5 is shown a portion of a expanded metal grid 3 which is incorporated

  by pressing in the superficial region of a subset

  which has not been lengthened or deformed.

  As seen, however, in Figure 6,

  this expanded metal grille 3 extends considerably-

  along the longitudinal direction (corresponding

  in the direction of the arrows in Figure 6), the substrate undergoes

  a corresponding simultaneous lengthening without

  detach from the expanded metal grid or crack.

  Such an elongation of the entire coating material

  1 can be done manually, even at low temperatures. The covering material 1

  can also be adapted to three-dimensional forms

  complexes without the help of auxiliary agents.

  Due to the low elastic recovery force of

  the expanded metal grid, the covering material

  the form it has taken, even

  without adhesive agent and / or additional fixation.

  Adequate adaptation is shown in Figure 7 to enclose and seal a chimney by

compared to an inclined roof.

  The cover material 1 according to the invention

  For a large number of possibilities of use, for example for the recovery of

  cracks, joints, openings, transition zones

  tion and others. The covering material according to the invention is also suitable for covering above or below such cracks,

  joints, interstices, openings, and transition areas

  and others, in buildings,. you-

  tures and constituent elements of these, by o passes water. The cover material according to the invention can be easily cut to any

  what form on the site and can then be applied

  without the use of auxiliary agents, areas to be covered over or under

make tight.

Claims (13)

  1. Sheet-shaped covering material,   band or web, comprising a reinforcing element   extensible cement inside a polyiso-   butylene, which may contain, as appropriate, usual additives such as antioxidants, ultraviolet absorbers, chromophoric pigments, mineral fillers and the like, characterized in that the polyisobutylene substrate (2 ) forms a   non-stick mass in the temperature range   cable to the technique of use; and the reinforcing element is an expanded metal grid (3) embedded in the substrate (2) which has, in the longitudinal direction, an extensibility of 50 to 150%, in the transverse direction, a   scalability of up to 20% and a   elastic grip less than or equal to 5%.   2. Recovery material according to the claim   1, characterized in that the metal grid   deployed is in a stainless metal.   3. Recovery material according to the claim   1 or 2, characterized in that the grid in   expanded metal (3) is aluminum.   4. Recovery material according to one of the   Claims 1 to 3, characterized in that the grid   expanded metal (3) has a thickness of 0.2 to 0.8 mm.   5. Recovery material according to one of the   Claims 1 to 4, characterized in that the grid   expanded metal (3) has a mesh length of 3 to 12 mm and a mesh width of 2 to 8 mm. 6. Recovery material according to one of the   Claims 1 to 5, characterized in that the grid   of expanded metal (3) has, in the longitudinal direction   the tensile strength of 10 to 80 N / cm and in the transverse direction   tensile force greater than or equal to 100 N / cm.   7. Recovery material according to one of the   Claims 1 to 6, characterized in that the   Trat (2) consists of a mixture of the following substances: parts by weight of polyisobutylene having an average molecular weight of about 1.3 x 106; to 80 parts by weight of polyisobutylene having an average molecular weight of about 0.4 x 106;   from 1 to 2 parts by weight of an anti-   non-chromophoric oxidant; from 1 to 4 parts by weight of an agent which absorbs ultraviolet rays and which is not chromophoric; from 20 to 60 parts by weight of chromophoric pigments; and from 100 to 130 parts by weight of charge.   8. Recovery material according to one of the   Claims 1 to 7, characterized in that the   trat (2) has a tensile strength less than or equal to 10 N / mm and a greater extensibility or equal to 50%.   9. Recovery material according to one of the   Claims 1 to 8, characterized in that the subs-   trat (2) consists of two layers (2/1, 2/2), the   expanded metal grid (3) is sandwiched between   be the two layers and by a pressing process   both layers are connected to each other through   towards the meshes of the expanded metal grid.   10. Recovery material according to the claim   9, characterized in that the two layers (2/1 and 2/2) have approximately the same thickness and are in the same substrate material.   11. Recovery material according to the   9 or 10, characterized in that the grid in   expanded metal (3) is covered directly by   extruding the mass forming the substrate (2) and is completely drowned.   12. Recovery material according to one   Claims 1 to 8, characterized in that the   substrate (2) consists of a single layer; and   the expanded metal grid (3) is embedded in the material   the substrate, in the vicinity of one both surfaces (4 or 5).   13. Recovery material according to the claim   12, characterized in that the expanded metal grid (3) is incorporated in the mass of the layer single substrate by rolling.