Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material

Definitions

• the invention relates to a flame-retardant sub-wallpaper made of rigid polystyrene foam which has an adhesion-promoting coating on at least one of its surfaces to improve the adhesion between the sub-wallpaper and wall covering, in particular wallpaper, this coating comprising a flame-retardant additive.
• Under-wallpaper is to be understood as an underlay in the form of a plate or film which is applied to a wall or ceiling and serves as a base for a covering, in particular for wallpapers.
• a sub-wallpaper made of rigid polystyrene foam is described, for example, in EU-A-0 036 156 and DE-U-79 31 745.
• the invention further relates to a means provided for the production of this sub-wallpaper of the type mentioned in the preamble of claim 7.
• Wall cladding panels or foils made of rigid polystyrene foam are generally known and serve as so-called sub-wallpapers for covering walls before a wallpaper is stuck on;
• foil rolls can also be found on the market. They are generally characterized by a rectangular spatial shape, their length and width are proportionately much larger than their thickness. With these plates or foils you can, for example, cover wall cracks, achieve a certain level of thermal insulation and condensation prevent education.
• a certain disadvantage of such wall cladding sheets or foils may be that excessive heat, e.g. due to open flames, the polystyrene melts below the flash point of a glued-on wallpaper and / or the foam structure breaks down. This creates a cavity between the wallpaper and the wall, so that when the flash point is reached, the wallpaper, which is favored by this cavity, burns very easily.
• this special equipment is often not required, so that it then makes the production of these products unnecessarily cumbersome and expensive.
• DE-U-79 31 745 teaches not the paste, but the adhesion-promoting agent applied to the sub-wallpaper made of polystyrene rigid foam To provide the surface layer with a flame retardant.
• the wallpaper provided with a paste is then connected to the sub-wallpaper via this adhesion-promoting layer.
• the plates are coated with an aqueous dispersion in the manner of filled dispersion adhesives during their production and then dried in a heating channel.
• the adhesion promoter has the task of increasing the adhesive strength between the sub-wallpaper and the wallpaper provided with paste.
• the surface layer of the sub-wallpaper containing the adhesion promoter may also have a flame-retardant additive, but this document does not contain any information about the type and amount of this substance or the application process.
• the task therefore arises of developing a highly effective flame retardant for composites comprising a sub-wallpaper with an adhesion-promoting surface layer and a wall covering, in particular a wallpaper, which on the one hand has the adhesive properties of the surface-coated foamed polystyrene plates or foils compared to those to be applied thereon Materials, in particular wallpaper provided with paste, are not adversely affected, but even improved, and on the other hand the flammability of the composite of sub-wallpaper and wall covering, in particular wallpaper, is reduced, in the case of wallpapers having a basis weight of 50 to 300 g / m 2 Class B2 or even B1 (DIN 4102) should be achieved.
• the sub-wallpaper can be in the form of sheet-like foils or rectangular plates, as have been known for a long time.
• the film has a customary thickness of 1 to 10, in particular 1 to 6 mm and a width of up to 1200 mm, the plate has a customary thickness of 1 to 12, in particular 2 to 8 mm, and is in a form which is dependent on the intended use , it can also be folded.
• the material from which the sub-wallpaper is made is rigid polystyrene foam, e.g. Particle foam, but preferably extruded rigid polystyrene foam. Processes for the production of such plates or foils or the materials themselves are known; reference is made to the references cited in EU-A-0 036 156.
• the adhesion-promoting coating comprises in particular the copolymers or terpolymers specified in claim 2 with a predominant proportion of vinyl acetate units, preferably a terpolymer composed of vinyl acetate, ethylene and vinyl chloride units is used (for example ®Mowilith D M 120 or ® Mowilith DM 122 , Manufacturer. Hoechst) ..
• the flame retardant can predominantly comprise organic or inorganic flame retardants, in particular halogen-containing and phosphorus-containing compounds known as such, e.g. chlorinated paraffins, or decabromodiphenyl ether or triphenyl phosphate can be used.
• halogen-containing and phosphorus-containing compounds known as such, e.g. chlorinated paraffins, or decabromodiphenyl ether or triphenyl phosphate can be used.
• the halogen compounds, silicates and phosphates usually used for plastics or papers are not used, but non-combustible inorganic compounds based on boron, aluminum or antimony.
• These compounds include, in particular, boric acid or salts thereof, antimony oxides and aluminum hydroxide (eg ® M ar- TINAL ON 310, manufacturer Martinswerke / Cologne).
• aluminum hydroxide eg ® M ar- TINAL ON 310, manufacturer Martinswerke / Cologne.
• the use of aluminum hydroxide with zinc borate gives an unexpectedly great synergistic effect with regard to the flame retardant effect, which is strongest when the weight ratio of the aluminum to the zinc compound is 1: 1 to 7: 1, in particular 2: 1 to 5: 1, is.
• these preferred flame retardants show a significantly lower development of smoke gases compared to other flame retardants and bring about a significantly reduced flammability of the composite of polystyrene foam and wallpaper. As has further been shown, they surprisingly even improve the adhesive effect of the adhesive raw material, which was not predictable.
• Applying the adhesion-promoting coating to the Bottom wallpaper occurs, for example, according to the so-called knife application process in the manner of a gluing machine.
• the agent mentioned in one of claims 7 to 10 is used.
• the coated material is then dried in a heating channel. Practically all of the water is removed.
• other application methods can also be used, such as rotary screen printing, roller application, brush application, casting processes with and without printing or spraying processes.
• the application amount of the surface coating is adjusted so that the weight per unit area after drying is 100 to 400, preferably 200 to 300 g / m 2 .
• the coating components When applied, the coating components are in aqueous dispersion, to which small amounts of processing agents such as cellulose ether and dispersion-stabilizing and film-forming aids are also added.
• processing agents such as cellulose ether and dispersion-stabilizing and film-forming aids are also added.
• wetting agents, preservatives, defoamers and an agent favoring film formation such as butyl diglycol acetate, may also advantageously be present in a total amount of up to 5% by weight, based on the total weight of the dispersion.
• the wallpaper is provided after the connection with the substrate, for example, room wall or ceiling, on their adhesion-promoting surface layer with a covering, 'for example, a T apete, a paint, a leveling or a plaster.
• a covering for example, a T apete, a paint, a leveling or a plaster.
• a flame-retardant wallpaper of the brand ® Kinnasand (manufacturer AB Kinnasand, Sweden) was provided with a paste and then applied to the polystyrene rigid foam plate coated with the above dispersion.
• This composite (wallpaper plus sub-wallpaper) achieved the classification B 1 (flame retardant) according to DIN 4102 in several combustion tests.
• Example 1 The wallpaper of Example 1 was provided with a paste and then applied to a polystyrene foam sheet which had been treated with the above-mentioned aqueous dispersion, but without the flame retardants.
• the classification B 2 (normally flammable) according to DIN 4102 was achieved with this combination in several combustion tests. -
• a heavy paper wallpaper (approx. 200 g / m 2 ) was provided with a paste, then applied to the polystyrene foam sheet treated with the dispersion of Example 1 and the composite subjected to the usual combustion tests.
• Classification B 2 (normally flammable) according to DIN 4102 was achieved with the composite.
• a heavy paper wallpaper (approx. 200 g / m 2 ) was provided with a paste and applied to the adhesion-promoting surface layer of a foamed polystyrene plate and the composite was tested in combustion tests.
• the above-mentioned dispersion but without the flame retardants, was applied to the plate and dried.
• the classification B 3 (highly flammable) according to DIN 4102 was determined in this network.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Paper (AREA)
• Laminated Bodies (AREA)
• Adhesive Tapes (AREA)
• Finishing Walls (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=6178801

Family Applications (1)

Country Status (3)

Cited By (2)

Family Cites Families (4)

• 1982
  • 1982-11-23 DE DE19823243259 patent/DE3243259A1/de not_active Withdrawn
• 1983
  • 1983-11-17 EP EP83111504A patent/EP0109663B1/fr not_active Expired
  • 1983-11-17 DE DE8383111504T patent/DE3377223D1/de not_active Expired
  • 1983-11-17 AT AT83111504T patent/ATE35432T1/de not_active IP Right Cessation

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