DE2531595A1 - ADDITIVES FOR MIXTURES IN CEMENT - Google Patents
ADDITIVES FOR MIXTURES IN CEMENTInfo
- Publication number
- DE2531595A1 DE2531595A1 DE19752531595 DE2531595A DE2531595A1 DE 2531595 A1 DE2531595 A1 DE 2531595A1 DE 19752531595 DE19752531595 DE 19752531595 DE 2531595 A DE2531595 A DE 2531595A DE 2531595 A1 DE2531595 A1 DE 2531595A1
- Authority
- DE
- Germany
- Prior art keywords
- composition according
- parts
- cement
- fatty acid
- phosphate
- 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.)
- Ceased
Links
- 239000000203 mixture Substances 0.000 title claims description 39
- 239000004568 cement Substances 0.000 title claims description 11
- 239000000654 additive Substances 0.000 title claims description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 12
- 239000000194 fatty acid Substances 0.000 claims description 9
- 239000000344 soap Substances 0.000 claims description 9
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 8
- 229930195729 fatty acid Natural products 0.000 claims description 8
- -1 phosphate ester Chemical class 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- 239000010452 phosphate Substances 0.000 claims description 7
- 150000004665 fatty acids Chemical class 0.000 claims description 6
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 5
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000003945 anionic surfactant Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 235000019738 Limestone Nutrition 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 206010041662 Splinter Diseases 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical class O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- HQEMLBBHWZUAQQ-UHFFFAOYSA-N sodium;8-(3-octyloxiran-2-yl)octanoic acid Chemical compound [Na+].CCCCCCCCC1OC1CCCCCCCC(O)=O HQEMLBBHWZUAQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004108 vegetable carbon Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/003—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K23/12—Sulfonates of aromatic or alkylated aromatic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
- C11D1/24—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds containing ester or ether groups directly attached to the nucleus
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D10/00—Compositions of detergents, not provided for by one single preceding group
- C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
- C11D10/042—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap based on anionic surface-active compounds and soap
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/36—Organic compounds containing phosphorus
- C11D3/362—Phosphates or phosphites
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
(1934-19741 8 MÜNCHEN 80(1934-19741 8 MUNICH 80
München, 11. Juli 1975 E153(L)Munich, July 11, 1975 E153 (L)
UNILEVER N.V.UNILEVER N.V.
Burgemeester s'Jacobplein 1, Rotterdam, NiederlandeBurgemeester s'Jacobplein 1, Rotterdam, Netherlands
Zusatzstoffe für zementhaltige MischungenAdditives for cementitious mixtures
Die Erfindung "betrifft Zusatzstoffe für zementhaltige Mischungen, deren Verwendung in solchen Mischungen und zementhaltige Mischungen, welche solche Zusatzstoffe enthalten, wobei die Zusatzstoffe die Fließeigenschafteri von Zementmischungen verbessern und dadurch die Notwendigkeit für eine manuelle Endbehandlung reduzieren.The invention "relates to additives for cementitious mixtures, their use in such mixtures and cementitious mixtures containing such additives, where the additives improve the flow properties of cement mixes and thereby the need for manual Reduce final treatment.
Seit langem ist es bereits ein Ziel bei der Formulierung von Zementzusatzstoffen, ein Material herzustellen, welches die Fließeigenschaften von zementhaltigen Mischungen verbessert, ohne die Festigkeitseigenschaften der erhaltenen Mischungen stark zu vermindern. Das Fließen wurde häufig verbessert,It has long been a goal in the formulation of cement additives to produce a material that the flow properties of cementitious mixtures are improved without affecting the strength properties of the mixtures obtained greatly diminish. The flow was often improved,
509885/1182509885/1182
TELEGRAMME! LEDERERPATENT MÖNCHEN TELEX: 5!16!4 LEDER DTELEGRAMS! LEATHER PATENT MÖNCHEN TELEX: 5! 16! 4 LEATHER D
jedoch wurde üblicherweise das Einschließen von Luft in den Mischungen durch den Zusatz von das Fließen verbessernden Mitteln in einem zu großen Ausmaß für bestimmte, hohe Festigkeit erfordernde Anwendungen der zementhaltigen Mischungen erhöht.however, the inclusion of air in the mixtures has usually been improved by the addition of flow enhancers Agents increased to too great a degree for certain high strength applications of the cementitious mixtures.
Aufgabe der Erfindung ist die Schaffung von Zusatzstoffen für zementhaltige Mischungen, die diese Nachteile nicht aufweisen.The object of the invention is to create additives for cementitious mixtures that do not have these disadvantages.
Überraschenderweise wurde gefunden, daß die Eingabe von bestimmten Zusatzmischungen in zementhaltige Mischungen ein Material mit hoher Festigkeit und niedrigem Luftgehalt mit guten Fließeigenschaften ergeben kann.Surprisingly, it was found that entering certain additional mixes in cementitious mixes with a material with high strength and low air content can give good flow properties.
Die Erfindung betrifft daher eine Zusammensetzung, die ein anionisches', grenzflächenaktives Mittel wie Natriumsalze von mit Formaldehyd kondensierten Naphthalinsulfonsäuren, eine Kalium- oder Natriumoeife einer C^- oder Cg-Fettsäure zusammen mit einem Phosphatester enthält, wobei das Verhältnis von Fettsäureseife ausreicht, um den Phosphatester in Wasser zu solubilisieren.The invention therefore relates to a composition containing an anionic surfactant such as sodium salts of naphthalenesulfonic acids condensed with formaldehyde, a potassium or sodium soap of a C ^ - or Cg-fatty acid together with a phosphate ester, the ratio of fatty acid soap being sufficient to make the phosphate ester in water solubilize.
Vorzugsweise liegen die Gewichtsanteile der Bestandteile in der Zusammensetzung in folgenden Bereichen: Fettsäureseife 1 bis 9, Natriumsalz von mit Formaldehyd kondensierten Naphthalinsulfonsäuren 10 bis 50 Teile, Phosphatester 1 bis 5 Teile.The proportions by weight of the constituents in the composition are preferably in the following ranges: fatty acid soap 1 to 9, sodium salt of naphthalenesulfonic acids condensed with formaldehyde 10 to 50 parts, phosphate ester 1 to 5 parts.
Geeigneterweise wird die Zusatzzusammensetzung mit Wasser vermischt, und sie kann in einfacher Weise als eine stabile, sich nicht auftrennende, gebrauchsfertige Lösung in den Handel gebracht werden. Eine solche Lösung enthält geeigneterweise auf jeweils ein Teil der Zusammensetzung von 1 bis $ Teile Wasser.Suitably the additive composition is mixed with water, and it can be used in a simple manner as a stable, non-separating, ready-to-use solution on the market to be brought. Such a solution suitably contains from 1 to $ parts for each part of the composition Water.
509885/ 1 182509885/1 182
_ 3 —_ 3 -
Die bevorzugten Phosphatester, die in diesen Zusammensetzungen verwendet werden, sind Tributylphosphat und Trikresylphosphat.The preferred phosphate esters used in these compositions are tributyl phosphate and tricresyl phosphate.
Die Erfindung wird anhand der folgenden Beispiele näher erläutert, wobei sich die Angaben in Teilen auf Gewicht beziehen.The invention is explained in more detail using the following examples, where the data in parts relate to weight.
Grober ZuschlagGross surcharge
runde Kiesel 10 mm 1,6 Teileround pebbles 10 mm 1.6 parts
runde Kiesel 20 mm 2,4 Teileround pebbles 20 mm 2.4 parts
feiner Zuschlag, Sand Zone 3 2,0 Teilefine aggregate, sand zone 3 2.0 parts
Zement (gewöhnlicher Portlandzement)1,0 TeileCement (common portland cement) 1.0 part
Wasser/Zement-Verhältnis 0,63Water / cement ratio 0.63
Sand der Zone 3 besitzt entsprechend der britischen Norm BS 882 folgendeZone 3 sand has the following properties in accordance with British standard BS 882
Sieblinie:Grading curve:
Sieb Norm BS 410 Gew.-%, die durch das BS-SiebSieve standard BS 410% by weight passing through the BS sieve
durchtretenstep through
100100
90 -- 100 85 - 100 75 - 100 60 - 79 12 - 40 0-1090 - 100 85 - 100 75 - 100 60 - 79 12 - 40 0-10
Proben dieses Mischungsentwürfes wurden hergestellt und in drei Formen untersucht: für sich alleine, vermischt mit der Zusatzzusammensetzung und zusammen mit den Naphthalinsulfonatsalzen bei Abwesenheit der Fettsäureseife und desSamples of this mix design were made and used in investigated three forms: on their own, mixed with the additional composition and together with the naphthalene sulfonate salts in the absence of the fatty acid soap and the
300 u600 left
300 u
509885/1 182509885/1 182
Phosphatesters, wobei die Zusatzzusammensetzungslösung in einer Menge von 2,5 Gew.-%, bezogen auf den Zement in der Mischung, eingegeben wurde. Die Formulierung der Zusatzzusammensetzungslösung war wie folgt:Phosphate ester, wherein the additional composition solution in an amount of 2.5 wt .-%, based on the cement in the Mixture, was entered. The formulation of the adjunct composition solution was as follows:
Natriumsalze von formaldehydkondensierten Naphthalinsulfonsäuren (sfnsa) 600 TeileSodium salts of formaldehyde condensed Naphthalenesulfonic Acids (SFNSA) 600 parts
Tributylphosphat (TBP) 60 TeileTributyl Phosphate (TBP) 60 parts
Natriumfettsäureseife (siehe Tabelle I)Sodium Fatty Acid Soap (see Table I)
Wasser auf 3000 Gew.-TeileWater to 3000 parts by weight
(TIe./Gew.)(TIe./Wt.)
Anmerkungen zu Tabelle I:Notes to Table I:
+ verdichtet (Mischung nicht geeignet zur Messung in der+ compacted (mixture not suitable for measurement in the
nicht verdichteten Form)non-compacted form)
++ sfnsa - Natriumealze von mit Formaldehyd kondensierten Naphthalinsulfonsäuren, 2,5 Gew.-%, bezogen auf Zement +++ fällt zusammen++ sfnsa - sodium salts of condensed with formaldehyde Naphthalenesulfonic acids, 2.5% by weight, based on cement +++, collapse
Kalkstein splitter 20mm 2,1 TeileLimestone splinter 20mm 2.1 parts
Kalkstein-splitter 10mm 1,1 TeileLimestone splinters 10mm 1.1 parts
Kalksteinstaub 2,2 TeileLimestone dust 2.2 parts
gewöhnlicher Portlandzement 1,0 Teileordinary portland cement 1.0 part
Wasser/Zement-Verhältnis 0,6 %Water / cement ratio 0.6%
Eine Probe dieses Kalksteinentwurfes wurde mit 2,5 Gew.-%, bezogen auf Zement, der beim vorangegangenen Versuch verwendeten Zusatzzusammensetzungslösung, welche die Cg-Säure enthielt, und eine andere Probe mit dem gleichen Anteil von sfnsa vermischt. Eine dritte Probe wurde als Kontrolle eingesetzt. Die Ergebnisse ergeben sich aus der folgenden Tabelle II.A sample of this limestone design was sourced at 2.5% by weight on cement, the additive composition solution used in the previous experiment, which contained the Cg acid, and another sample mixed with the same proportion of sfnsa. A third sample was used as a control. The results result from the following table II.
509885/1182509885/1182
verwendete Natriumfettsäureseifeused sodium fatty acid soap
'10'10
Kontrollversuche; kein Zusatz- nur mit stoff sfnsa ++ Control tests; no additional - only with fabric sfnsa ++
erforderliche Menge zum Auflösen von TBP in der Formulierung (TIe./Gew.)Amount required to dissolve TBP in the formulation (TIe./Wt.)
100100
6060
BetonsProperties of the plastic
Concrete
CDO
CD
UlUJ
Ul
britischer Norm BS 1881 S.2Sag (mm) accordingly
British standard BS 1881 p.2
roOD
ro
Kompressionsfestigkeit (N/mm ) des nicht-verdichteten Betons nachCompression strength (N / mm) of the non-compacted concrete
1 Tag
7 Tage
28 Tage1 day
7 days
28 days
7
24 7th
24
3535
5
20 5
20th
3131
Aussehen der Lösung nach 24 hAppearance of the solution after 24 hours
7 +
24 +
34 +7+
24 +
34 +
bei 5 UCat 5 U C
aufgetrenntseparated
klar klar in zwei Schichten clear clear in two layers
13 2213 22
klarclear
Eigenschaf tön-.der plastischen Mischung Kontrolle 2,5 % sfnsaProperty of the plastic mixture Control 2.5% sfnsa
2,5 % Zusatzzusammenset zung2.5% additional composition
on ο coon ο co
Luftgehalt (Vol.-%) vibriert unvibriertAir content (vol .-%) vibrates, not vibrated
Absacken entsprechend britischer Norm BS 1881, S. 2 (mm)Sagging according to British standard BS 1881, p. 2 (mm)
erhärtete, kompaktierte Mischungen Kompressionsfestigkeit (N/mm ) nach hardened, compacted mixtures after compression strength (N / mm)
1 Tag 7 Tage 28 Tage 1,7
751 day 7 days 28 days 1.7
75
2,9
6,62.9
6.6
1,3
1,41.3
1.4
fällt zusammen fällt zusammencollapses collapses
3,5 +
+3.5 +
+
++
4
23
314th
23
31
+
+
++
+
+
26
3426th
34
O
IO
I.
+ = nicht-kompaktiert,+ = not compacted,
cn co cncn co cn
Claims (7)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31673/74A GB1506854A (en) | 1974-07-17 | 1974-07-17 | Cementiferous compositions and additive compositions therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2531595A1 true DE2531595A1 (en) | 1976-01-29 |
Family
ID=10326704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19752531595 Ceased DE2531595A1 (en) | 1974-07-17 | 1975-07-15 | ADDITIVES FOR MIXTURES IN CEMENT |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE2531595A1 (en) |
| FR (1) | FR2278642A1 (en) |
| GB (1) | GB1506854A (en) |
| IT (1) | IT1041397B (en) |
| ZA (1) | ZA754511B (en) |
-
1974
- 1974-07-17 GB GB31673/74A patent/GB1506854A/en not_active Expired
-
1975
- 1975-07-14 ZA ZA754511A patent/ZA754511B/en unknown
- 1975-07-15 DE DE19752531595 patent/DE2531595A1/en not_active Ceased
- 1975-07-16 FR FR7522234A patent/FR2278642A1/en active Granted
- 1975-07-16 IT IT7568865A patent/IT1041397B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ZA754511B (en) | 1977-02-23 |
| FR2278642B1 (en) | 1982-09-10 |
| FR2278642A1 (en) | 1976-02-13 |
| IT1041397B (en) | 1980-01-10 |
| GB1506854A (en) | 1978-04-12 |
| AU8299375A (en) | 1977-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8128 | New person/name/address of the agent |
Representative=s name: LEDERER, F., DIPL.-CHEM. DR. MEYER-ROXLAU, R., DIP |
|
| 8131 | Rejection |