EP0600332B1 - Mur anti-bruit ignifuge de verre acrylique - Google Patents

Mur anti-bruit ignifuge de verre acrylique Download PDF

Info

Publication number
EP0600332B1
EP0600332B1 EP93118725A EP93118725A EP0600332B1 EP 0600332 B1 EP0600332 B1 EP 0600332B1 EP 93118725 A EP93118725 A EP 93118725A EP 93118725 A EP93118725 A EP 93118725A EP 0600332 B1 EP0600332 B1 EP 0600332B1
Authority
EP
European Patent Office
Prior art keywords
acrylic glass
protection wall
noise
copolymer
panes
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.)
Revoked
Application number
EP93118725A
Other languages
German (de)
English (en)
Other versions
EP0600332A1 (fr
Inventor
Günter Dr. Johannson
Manfred Dr. Krieg
Michael Dr. Müller
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.)
Roehm GmbH Darmstadt
Original Assignee
Roehm GmbH Darmstadt
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6886776&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0600332(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Roehm GmbH Darmstadt filed Critical Roehm GmbH Darmstadt
Publication of EP0600332A1 publication Critical patent/EP0600332A1/fr
Application granted granted Critical
Publication of EP0600332B1 publication Critical patent/EP0600332B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0017—Plate-like elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/54—Slab-like translucent elements

Definitions

  • the invention relates to a flame-retardant noise barrier made of acrylic glass, consisting of supports anchored in the ground and fastened to them, e.g. 10 to 30 mm thick acrylic glass panes.
  • Such noise barriers must withstand a limited fire load, e.g. grass fire at the installation site.
  • This property can be easily achieved by incorporating the usual flame-retardant additives based on phosphorus or halogen compounds into the acrylic glass during manufacture. These additives are largely harmful to health and therefore require special protective measures in the manufacture and processing of acrylic glass.
  • the invention has for its object to provide acrylic glass panels for noise barriers without halogen and phosphorus additives flame retardant.
  • the additional technical regulation for noise barriers ZTV-Lsw 88 of the Federal Minister of Transport is to be met.
  • this object can be achieved on a noise protection wall made of acrylic glass, consisting of supports and acrylic glass panes attached thereto, in that the acrylic glass contains at least the surfaces of the panes of a copolymer of methyl methacrylate with 1 to 20% by weight of an alkyl acrylate or Styrene is made and is free of halogen and phosphorus-containing flame retardant additives.
  • a test arrangement is used in which a wall element, which is framed in a U-profile frame, is placed vertically on a 25 cm high non-flammable base. Immediately in front of the front, two wire baskets of 30 x 30 x 20 cm, each filled with 600 g wood wool, are placed on the floor in the third points of the element and simultaneously lit. After an hour, the same treatment is repeated on the back of the element.
  • the tested change element may be around the Fire test, do not catch fire and do not burn in places. There must be no burn holes of more than 6 cm in area and no cracks of more than 5 cm in length.
  • Wall elements according to the invention (manufactured according to Example 1) with the dimensions 2000 x 1000 x 15 mm meet the fire test described.
  • wall elements of the same dimensions made of ordinary cast acrylic glass, consisting of pure polymethyl methacrylate only meet these test conditions to 50%. The other elements caught fire and had to be extinguished after the end of the experiment.
  • the fire load in the prescribed test is limited to a very low material depth.
  • the acrylic glass pane must therefore consist of the specified copolymer at least to this depth. It is sufficient for the copolymer to form outer layers of approximately 0.1 to 1 mm in thickness, while the interior can consist of non-flame-retardant acrylic glass or other plastics of sufficient strength. Since the production of such multi-layer panes is complex, homogeneous panes made of the copolymer are preferred.
  • methyl methacrylate is the main component of the copolymers according to the invention.
  • the polymers built up essentially from them are notable for high aging and weathering resistance, a property which is of outstanding importance particularly in the case of noise barriers.
  • the lower alkyl esters of acrylic acid with 1 to 4 carbon atoms in the alkyl radical are particularly suitable as alkyl acrylates.
  • Higher alkyl acrylates have a softening effect, which would make the acrylic glass pane more sensitive to mechanical damage.
  • other comonomers can optionally be used, but this can have disadvantages in terms of weather resistance.
  • end groups of a mercaptan also have a flame-retardant effect on the polymerized methyl methacrylate, but this is usually not sufficient in itself to fulfill the fire test.
  • the copolymer according to the invention is produced by radical polymerization in the presence of a mercaptan, the flame-retardant effect of the comonomers is further enhanced.
  • Mercaptans such as n-butyl mercaptan, dodecyl mercaptan, thioglycolic acid, mercaptoethanol, 2-ethylhexylthioglycolate, butylthioglycolate, octylthioglycolate or methyl 3-mercaptopropionate act as transfer regulators. If they are present during the radical polymerization of the monomer mixture consisting of methyl methacrylate and the alkyl acrylate and / or styrene, they are able to react with the radical chain ends of the growing polymer chains. This stops their further growth and forms a mercapto radical, which in turn becomes the starting point for a new polymer chain. In this way, polymer chains are formed which have the rest of the mercaptan as an end group.
  • the transfer action of the mercaptans leads to a reduction in the average molecular weight of the copolymer. If the molecular weight is reduced too much, the strength properties of the acrylic glass can be impaired. Therefore, the amount of mercaptan is preferably limited so that the weight average molecular weight does not fall below 50,000. Suitable amounts of mercaptan are generally about 0.1 to 2% by weight, based on the weight of the monomers.
  • the acrylic glass panes In order to achieve a sufficient noise protection effect, the acrylic glass panes must have a considerable thickness. With thicknesses below 10 mm, the sound-absorbing effect is too low. At thicknesses over 30 mm, the increase in effectiveness is not economically feasible in relation to the increasing material consumption.
  • the disks are preferably 12 to 25 mm thick.
  • the desired thickness can be set by appropriate choice of the thickness of the sealing cord inserted between the glass walls - taking into account the polymerization-related shrinkage. The production of correspondingly thick slices by extrusion is difficult. A suitable extrusion die is described in German utility model G 90 015187.
  • panes with clearly visible longitudinal or horizontal stripes at intervals of a few centimeters or opaque colored panes are sometimes preferred.
  • the acrylic glass panes usually have dimensions of 2 to 4 m in length and 1 to 2 m in width. They are usually fastened to vertical supports or posts that are anchored in the ground. The edges are preferably edged with U-profiles made of metal.
  • Example 2 The procedure according to Example 2 was repeated, but the monomer mixture additionally contained 0.3 part by weight. 2-ethylhexyl thioglycolate. The polymerization temperature was 45 ° C. The fire test of the PMMA sheet obtained showed even less blistering than in Example 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Table Devices Or Equipment (AREA)
  • Surface Treatment Of Glass (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Claims (5)

  1. Mur anti-bruit ignifugé en verre acrylique, se composant de montants et de panneaux de verre acrylique fixés à ceux-ci, caractérisé en ce que le verre acrylique se compose, au moins à la surface des panneaux, d'un copolymère du méthacrylate de méthyle avec 1 à 20% en poids d'un acrylate d'alkyle ou de styrène et est dépourvu d'additifs ignifuges contenant des halogènes et du phosphore.
  2. Mur anti-bruit selon la revendication 1, caractérisé en ce que le copolymère contient des groupements terminaux d'un mercaptan.
  3. Mur anti-bruit selon la revendication 1 ou 2, caractérisé en ce que le copolymère a un poids moléculaire moyen de 50 000 à 200 000.
  4. Mur anti-bruit selon la revendication 3, caractérisé en ce que les panneaux de verre acrylique sont produits par extrusion.
  5. Mur anti-bruit selon l'une quelconque des revendications 1 à 4, caractérisé en ce que des inserts résistants à la traction, continus en direction longitudinale, sont incorporés dans le verre acrylique.
EP93118725A 1992-12-04 1993-11-22 Mur anti-bruit ignifuge de verre acrylique Revoked EP0600332B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9216548U 1992-12-04
DE9216548U DE9216548U1 (de) 1992-12-04 1992-12-04 Flammgeschützte Lärmschutzwand aus Acrylglas

Publications (2)

Publication Number Publication Date
EP0600332A1 EP0600332A1 (fr) 1994-06-08
EP0600332B1 true EP0600332B1 (fr) 1996-02-14

Family

ID=6886776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118725A Revoked EP0600332B1 (fr) 1992-12-04 1993-11-22 Mur anti-bruit ignifuge de verre acrylique

Country Status (6)

Country Link
EP (1) EP0600332B1 (fr)
AT (1) ATE134236T1 (fr)
DE (2) DE9216548U1 (fr)
DK (1) DK0600332T3 (fr)
ES (1) ES2084436T3 (fr)
HK (1) HK161796A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9305850U1 (de) * 1993-04-20 1993-06-09 Röhm GmbH & Co. KG, 64293 Darmstadt Flammgeschützte Lärmschutzwand aus Acrylglas
IT1283844B1 (it) * 1996-08-28 1998-04-30 Atohaas Holding Cv Lastre antiframmentazione a base di polimeri acrilici
IT1290061B1 (it) 1997-03-13 1998-10-19 Atohaas Holding Cv Lastre antirumore
DE10243062A1 (de) * 2002-09-16 2004-03-25 Röhm GmbH & Co. KG Heißwasserwechseltestbeständiges Sanitärmaterial aus PMMA-Formmasse oder schlagzäher PMMA-Formmasse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8524319U1 (de) * 1985-08-24 1985-10-10 Röhm GmbH, 6100 Darmstadt Verglasungssprosse
JPH07100725B2 (ja) * 1987-02-17 1995-11-01 株式会社日本触媒 耐熱性、透明性に優れた新規メチルメタクリレート―スチレン系樹脂の製造方法
DE59001476D1 (de) * 1989-07-13 1993-06-24 Degussa Als laermschutzelemente geeignete platten aus acrylglas.
DE9015187U1 (de) * 1990-11-05 1992-03-05 Röhm GmbH, 6100 Darmstadt Extrusionsdüse zur Herstellung flacher Bahnen aus thermoplastischem Kunststoff

Also Published As

Publication number Publication date
EP0600332A1 (fr) 1994-06-08
HK161796A (en) 1996-09-06
DK0600332T3 (da) 1996-03-25
DE59301638D1 (de) 1996-03-28
ES2084436T3 (es) 1996-05-01
DE9216548U1 (de) 1993-02-04
ATE134236T1 (de) 1996-02-15

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