DE1658890A1 - Sound-insulating laminated glass element - Google Patents
Sound-insulating laminated glass elementInfo
- Publication number
- DE1658890A1 DE1658890A1 DE19681658890 DE1658890A DE1658890A1 DE 1658890 A1 DE1658890 A1 DE 1658890A1 DE 19681658890 DE19681658890 DE 19681658890 DE 1658890 A DE1658890 A DE 1658890A DE 1658890 A1 DE1658890 A1 DE 1658890A1
- Authority
- DE
- Germany
- Prior art keywords
- glass plates
- sound
- laminated glass
- glass element
- adjacent glass
- 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.)
- Granted
Links
- 239000005340 laminated glass Substances 0.000 title description 3
- 239000011521 glass Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 241001122767 Theaceae Species 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 9
- DMYOHQBLOZMDLP-UHFFFAOYSA-N 1-[2-(2-hydroxy-3-piperidin-1-ylpropoxy)phenyl]-3-phenylpropan-1-one Chemical compound C1CCCCN1CC(O)COC1=CC=CC=C1C(=O)CCC1=CC=CC=C1 DMYOHQBLOZMDLP-UHFFFAOYSA-N 0.000 description 1
- 229920001079 Thiokol (polymer) Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000010181 polygamy Effects 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
- B32B17/10045—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets with at least one intermediate layer consisting of a glass sheet
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
- E06B3/6707—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased acoustical insulation
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
- E04B2001/8466—Solid slabs or blocks layered with an intermediate layer formed of lines or dots of elastic material
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Multimedia (AREA)
- Building Environments (AREA)
- Securing Of Glass Panes Or The Like (AREA)
- Joining Of Glass To Other Materials (AREA)
- Laminated Bodies (AREA)
Description
8 München 22, Widenmayenlrafle 23 Telefon 10311] 297194/297834 Postscheck] München 170280 Bankkontos Bayerische Hypotheken· und8 Munich 22, Widenmayenlrafle 23 Telephone 10311] 297194/297834 Postscheck] Munich 170280 Bank accounts Bayerische Hypotheken · and
Wechselbank Mönchen Re 8787 Ihr ZeichenExchange bank monks Re 8787 your mark
Unser Zeichen 9063 TanOur sign 9063 Tan
7. Feb.^58Feb. 7 ^ 58
jngemanssons IngenjörsbyrS-AB Göteborg (Schweden)jngemanssons IngenjörsbyrS-AB Gothenburg (Sweden)
S challi 3 oli er ende s Verbundglas elementS challi 3 oli er end s laminated glass element
Die Erfindung betrifft ein schallisolierendes Bauelement aus zwei oder mehreren Glasplatten oder -scheiben. Derartige Bauelemente werden als Verbundelemente bezeichnet.The invention relates to a sound-insulating component made of two or more glass plates or panes. Such components are referred to as composite elements.
In der Bauakustik gelten in dem ?requenzbereich von 100 bis 5150 Hz hestimmte Forderungen hinsichtlich der üchalldlimmung. Die Schalldämmung ist freq.ue η ζ abhängig. Bei Plattendicken unter 4 mm ist die Luftschalldämmung für eine gegebene Frequenz nur von dem Gewicht der Platte pro i'lächeneinh.eit abiiängig. Die dchalldäramung R nimmt bei jeder "Verdoppelung der frequenz um ein Inkrement von 6 dB zu, und zwar nach der Formel R = 20 log M3 + 20 log f - 49 dB (l)In building acoustics, certain requirements with regard to noise dimming apply in the frequency range from 100 to 5150 Hz. The sound insulation is freq.ue η ζ dependent. In the case of panel thicknesses below 4 mm, the airborne sound insulation for a given frequency only depends on the weight of the panel per unit of area. The sound insulation R increases with every "doubling of the frequency by an increment of 6 dB, according to the formula R = 20 log M 3 + 20 log f - 49 dB (l)
Dabei iat mit f die frequenz in Hz und mit M-' ctaifc- Gewiqht proWith f the frequency in Hz and with M - 'ctaifc- Gewiqht pro
2
i'lächeneinheit in kg/m bezeichnet.2
denotes the unit of area in kg / m.
009828/0583009828/0583
Die Anforderungen an die ifahalldämiaung werden" im allgemeinen durch die erforderliehe Schalldämmung für die niedrigsten Frequenzen bestimmt. Bei den höheren i?reguenzen erhält man dann eine unnötig gute Schalldämmung. Bei Platten oder scheiben mit einer Dicke über 4- mm ist die uchalldämiaung in dem vorstehend angegebenen Frequenzbereich auch von der Steifheit der Platte abhängig. Im Bereich der Koinzidenzfrequenss f ist die Schalldämmung geringer als nach der vorstehend angegebenen formel. Die Koinzidenzfrequenz der Platte wird nach der Formel f .„ 1,83 . IQ*.. M3 1/2 Hz (2)The requirements for ifahalldämiaung are "generally determined by the required soundproofing for the lowest frequencies. With the higher i? Reguenzen you get an unnecessarily good soundproofing. For panels or panes with a thickness of more than 4 mm, the uchalldämiaung is in the above specified frequency range also depends on the stiffness of the plate. In the field of f Koinzidenzfrequenss the sound is lower than according to the above formula. the coincidence frequency f of the plate is according to the formula. "1.83. * .. IQ M 3 1/2 Hz (2)
C B1/2 C B 1/2
berechnet, in der H« das Grewicht der Platte proÜ'läaheneinheit in kg/m und B die Biegesteifheit der Platte pro Einheit der Breite ^(Newton meter) bezeichnet.calculated, in the H «the gray weight of the plate per unit of length in kg / m and B is the bending stiffness of the plate per unit of the Width ^ (Newton meter) designated.
Bei einer 6 mm dicken Platte liegt ψ bei etv/a 2500 Hz, d.h. etwas unterhalb der oberen j?reGuenz von" 5150 Hz. Bei den Frequenzen im oberen Seil des lioriabereiciiu ist die Schalldämmung jedoch besser als vorgeschrieben, so daß,die Herabsetzung der Schalldämmung im Bereich der Koinzidenzfrequenz zulässig ist.For a 6 mm thick plate, ψ is about 2500 Hz, ie slightly below the upper j? ReGuence of "5150 Hz. At the frequencies in the upper rope of the lioriabereiciiu, however, the sound insulation is better than prescribed, so that the reduction of the Sound insulation in the range of the coincidence frequency is permissible.
Bei einer dickeren Platte mit einer Koinzidenzfrequenz unter 2500 Hz wird die Schalldämmung im Bereich der Koinzidenzfrequenz so stark herabgesetzt, daß 3ie nur geringeren Anforderungen genügt. Es hat daher den üiischein, daß man eine befrie- digende Schalldämmung nur bis zu einer Plattendicke von 6 mm erzielen kann. s In the case of a thicker plate with a coincidence frequency below 2500 Hz, the sound insulation in the area of the coincidence frequency is reduced so much that it only meets lower requirements. It therefore has the rule that satisfactory sound insulation can only be achieved up to a panel thickness of 6 mm. s
009828/0583009828/0583
Dies ist jedoch nicht der Fall· Nachstehend werden zwei Maßnahmen beschrieben» mit denen bei Verwendung von Verbundglas eine höhere Schalldämmung erzielbar ist.However, this is not the case · Two measures are described below »with those when using laminated glass a higher sound insulation can be achieved.
Zunächst kann man mehrere Glasplatten übereinander stapeln und an ihren Rändern nachgiebig miteinander verbinden. In diesen lall darf keine der Glasplatten dicker sein als 6 mm.First of all, you can put several glass plates on top of each other stack and join together at their edges. In this lall, none of the glass plates may be thicker than 6 mm.
ITach der formel (2) ist die Koinzidenzfrequenz des Verbundelements nicht niedriger als die der dicksten Glasplatte des Elements, weil das Verhältnis Mg/B unverändert bleibt oder größer wird, wenn die Glasplatten nachgiebig· miteinander ver- bunden sind. .According to formula (2), the coincidence frequency of the composite element is not lower than that of the thickest glass plate of the element, because the ratio M g / B remains unchanged or increases when the glass plates are flexibly connected to one another. .
Aus optischen Gründen dürfen die üboreinsnde-rgestapelten Glasplatten einander jedoch nicht direkt berühren, v?eil sonst Li chtbrechurigi· effekte in -?sorm von ITewtonscken Hingen aiiftretoii, Vielehe die Durchsichtigkeit des Clements beeinträchtigen. Wenn man ζ wischen den ...and teilen der Glasplatten Abstandhalter anordnet, können "derartige ürac'neinun-jen verhindert werden, doch tritt dann oine weitere Jenwieriglzeit auf. Wenn zwischen den Glasplatten Lufträume vorhanden ei:ia, h-vE das System eine 3.eaonansfrequen^, in der«n. bereich die bchallaäsiaung niedriger iüt. Aus diesen «irunuö sollen axe llaspi-.-Ji;oii einen aö^lichöc kleinen .ibstand vonein .naer ϊιαΐι.ιΐ, ojine .ein..aider -£.u. irgendeiner ötelle infülge von Veränderungen der ϋ^ΐτ-οηαΐ^β zu berühren. Der aurdijicanittliche Aoet^ni soll nie ^-röirvar sein als 0,5 mn. i.ecn ille iil;ÄSplat o.en .- ..il, aic.: uiiid, errüilt :.vzn dann "eine iiesc&aizfrequenz von 1350 Hz. Vie-.: alle iliispl^ttsn 6 aia dick .sind, beträgt, die Hesona.nzxi'2iu^--" 1000 Ils. ilan -rliält den angegebenen Abstand und die angegebene ii-rndvirbiiiluiL-, iiiö.er. :ian auf die lianJ-'ceile derFor optical reasons, however, the stacked glass plates must not touch each other directly, otherwise light breaking effects in -? s orm of ITewtonscken Hingen aiiftretoii, polygamy impair the transparency of the clement. If one arranges spacers wiping the ... and parts of the glass plates, such ürac'neinun-jen can be prevented, but then there is an additional time 3. aonansfrequen ^, in the "n. Area the bchallaäsiaung lower iüt. From this" irunuö ax llaspi -.- Ji; oii should be an aö ^ lichöc small .ibstand vonein .naer ϊιαΐι.ιΐ, ojine .ein..aider - .. to touch £ .u any ötelle infülge changes in ϋ ^ ΐτ-οηαΐ ^ β ^ ni the aurdijicanittliche Aoet should never be ^ -röirvar than 0.5 mn i.ecn ille iil;. ÄSplat o.en .-. .il, aic .: uiiid, erruilt : .vzn then "an iiesc & aiz frequency of 1350 Hz. Vie- .: all iliispl ^ ttsn 6 aia thick .are, the Hesona.nzxi'2iu ^ -" 1000 Ils. ilan -rli maintains the specified distance and the specified ii-rndvirbiiiluiL-, iiiö.er .: ian on the lianJ-'ceile of the
0098287058300982870583
Glasplatten einen Streifenais einem nicht erhärtenden Klebstoff aufbringt und dann die Platten gegeneinanaerpreßt, bis der gewünschte Abstand erreicht ist. Geeignete Klebstoffe sind synthetische Kautschuks auf Polysulfidbasis (Thiokol) oder 3?olyurethanbasis.Glass plates have a strip as a non-hardening adhesive applies and then presses the plates against one another until the desired Distance is reached. Suitable adhesives are synthetic rubbers based on polysulfide (Thiokol) or 3? Olyurethane-based.
Die zweite Maßnahme besteht iß .-tufbau eines Verbundöltfinents mit zwei oder mehreren Glasplatten, deren einander ^e^enttberliegende Flächen in ihrem ganzen Ausmaß miteinander Verklebt sind. Der Illebstofi" muß eine einwandfrei durchsichtige Zwischenschicht öiläen und J.m Innern des Verbünde!events, zn. viskoselas-tischen Snergieverlus can führen. Derartige Klebstoffe auf Kunststoffbasis sind im Handel erhältlich, beispielsweise das ton den Farbwerken Hoechst unter der Bezeichnung Vp 71 vertriebene Viny 1-Acetat-Mischpolymerisat. Infolge der Innenverluste des Yerbundeleae&ts idirä die Herabsetzung der öchalldäEiinung an der EoiiiBidensfreaiienz kompensiert» so daß vlas in jeder belie-Mgen Sicke tr erwenden werden kann.The second measure consists in the construction of a composite oil fin with two or more glass plates, the surfaces of which are opposite to one another and are glued to one another to their full extent. The Illebstofi "must öiläen a perfectly transparent intermediate layer and Jm inside the networks! Events, zn. Viskoselas-schematically Snergieverlus lead can. Such adhesives based on plastics are commercially available, for example, the sound Farbwerke Hoechst under the name Vp 71 displaced Viny 1- Acetate co-polymer. As a result of the internal losses of the yerbund layer, the reduction in acoustic insulation on the surface is compensated for, so that vlas can be used in any bead.
00S828/05S3 " *-**-> BAD 00S828 / 05S3 " * - ** -> BAD
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE182867A SE323493B (en) | 1967-02-09 | 1967-02-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE1658890A1 true DE1658890A1 (en) | 1970-07-09 |
| DE1658890C3 DE1658890C3 (en) | 1975-07-24 |
Family
ID=20258908
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681709322 Ceased DE1709322B2 (en) | 1967-02-09 | 1968-02-07 | Sound absorbing component |
| DE19681658890 Expired DE1658890C3 (en) | 1967-02-09 | 1968-02-07 | Sound-absorbing component made from glass panels |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681709322 Ceased DE1709322B2 (en) | 1967-02-09 | 1968-02-07 | Sound absorbing component |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE710517A (en) |
| DE (2) | DE1709322B2 (en) |
| DK (1) | DK123878B (en) |
| GB (2) | GB1222092A (en) |
| NO (1) | NO120894B (en) |
| SE (1) | SE323493B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0407852A2 (en) * | 1989-07-13 | 1991-01-16 | Degussa Aktiengesellschaft | Acrylic glass sheets suited for noise screen elements |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE344093B (en) * | 1970-05-28 | 1972-03-27 | Akustikbyran Ab | |
| CH615244A5 (en) * | 1976-05-20 | 1980-01-15 | Cardinale Raffaele | |
| US4041663A (en) * | 1976-07-30 | 1977-08-16 | Ppg Industries, Inc. | Reducing solar radiation transmittance of installed glazing |
-
1967
- 1967-02-09 SE SE182867A patent/SE323493B/xx unknown
-
1968
- 1968-02-07 DE DE19681709322 patent/DE1709322B2/en not_active Ceased
- 1968-02-07 NO NO47768A patent/NO120894B/no unknown
- 1968-02-07 DE DE19681658890 patent/DE1658890C3/en not_active Expired
- 1968-02-08 DK DK50068A patent/DK123878B/en unknown
- 1968-02-08 BE BE710517D patent/BE710517A/xx unknown
- 1968-02-09 GB GB643668A patent/GB1222092A/en not_active Expired
- 1968-02-09 GB GB5287270A patent/GB1223540A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0407852A2 (en) * | 1989-07-13 | 1991-01-16 | Degussa Aktiengesellschaft | Acrylic glass sheets suited for noise screen elements |
| EP0407852A3 (en) * | 1989-07-13 | 1991-06-19 | Degussa Aktiengesellschaft | Acrylic glass sheets suited for noise screen elements |
Also Published As
| Publication number | Publication date |
|---|---|
| SE323493B (en) | 1970-05-04 |
| DE1658890C3 (en) | 1975-07-24 |
| BE710517A (en) | 1968-06-17 |
| GB1222092A (en) | 1971-02-10 |
| DK123878B (en) | 1972-08-14 |
| NO120894B (en) | 1970-12-21 |
| GB1223540A (en) | 1971-02-24 |
| DE1709322B2 (en) | 1978-04-06 |
| DE1709322A1 (en) | 1972-03-09 |
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