EP0189890A2 - Elément de renforcement pour ou dans le béton poreux à revêtement de protection anti-corrosif - Google Patents

Elément de renforcement pour ou dans le béton poreux à revêtement de protection anti-corrosif Download PDF

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Publication number
EP0189890A2
EP0189890A2 EP19860101072 EP86101072A EP0189890A2 EP 0189890 A2 EP0189890 A2 EP 0189890A2 EP 19860101072 EP19860101072 EP 19860101072 EP 86101072 A EP86101072 A EP 86101072A EP 0189890 A2 EP0189890 A2 EP 0189890A2
Authority
EP
European Patent Office
Prior art keywords
diorganopolysiloxane
coating
against corrosion
meth
acrylic acid
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.)
Withdrawn
Application number
EP19860101072
Other languages
German (de)
English (en)
Other versions
EP0189890A3 (fr
Inventor
Dieter Gerhardinger
Karl-Heinrich Dr. Dipl.-Chem. Wegehaupt
Hans-Rudolf Pfeffer
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie AG
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
Application filed by Wacker Chemie AG filed Critical Wacker Chemie AG
Publication of EP0189890A2 publication Critical patent/EP0189890A2/fr
Publication of EP0189890A3 publication Critical patent/EP0189890A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Definitions

  • the task is to protect reinforcement elements for or in aerated concrete against corrosion by aggressive media, such as aqueous solutions of sodium chloride, by means of a coating which can be applied to the reinforcement elements once, requires little or no energy to dry the coating, is resistant to the relatively high temperatures used in some processes for the production of aerated concrete and guarantees particularly high protection against corrosion even with a relatively small layer thickness.
  • This object is achieved by the invention.
  • the invention relates to reinforcement elements protected against corrosion for or in aerated concrete, characterized in that the coating consists of organopolysiloxane elastomer.
  • the reinforcement elements are preferably made of iron or iron alloys, in particular rebar.
  • the aerated concrete can be gas concrete, foam concrete or light lime concrete.
  • organopolysiloxane elastomer such is from Condensation or addition of Si-bonded hydrogen onto an aliphatic carbon-carbon double bond of crosslinkable composition based on diorganopolysiloxane, which contains copolymer, which was produced by copolymerizing styrene and (meth) acrylic acid ester by means of free radicals in the presence of the diorganopolysiloxane, is preferred.
  • Such masses can be one-component systems, that is to say masses which are marketed in a completely mixed form. However, these can also be two-component systems, that is to say masses which are more or less prepared by mixing at least two components immediately before application to the reinforcement elements to be protected.
  • compositions which can be crosslinked by condensation or addition of Si-bonded hydrogen onto an aliphatic carbon-carbon double bond based on diorganopolysiloxane which contains copolymer which has been produced by copolymerizing styrene and (meth) acrylic acid ester by means of free radicals in the presence of the diorganopolysiloxane , the amount of diorganopolysiloxane 20 to 80 percent by weight, based on the total weight of diorganopolysiloxane and copolymer of styrene and (meth) acrylic acid ester.
  • copolymers of styrene and (meth) acrylic acid esters which were produced in the presence of diorganopolysiloxane, consist of 35 to 70 percent by weight of units derived from styrene and the rest of units derived from (meth) acrylic acid esters.
  • Particularly preferred as copolymers which were produced in the presence of the diorganopolysiloxane are those of styrene and n-butyl acrylate.
  • the n-butyl acrylate can also at least partially by z. B. methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, sec-butyl acrylate, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate or sec-butyl methacrylate or a mixture of at least two of these (meth) acrylic acid esters.
  • At least 80% of the number of SiC-bonded organic residues of the diorganopolysiloxanes, in the presence of which the copolymers of styrene and (meth) acrylic acid esters are generated, are methyl residues.
  • a copolymer of styrene and (meth) acrylic acid ester and crosslinking agents such as methyltris (methylethylketoxime) silane and, if appropriate Crosslinking catalyst, such as di-n-butyltin dilaurate, may optionally contain further substances for the masses preferred for the production of the coatings according to the invention for or in aerated concrete.
  • additional diorganopolysiloxane in particular dimethylpolysiloxane, each of which has a Si-bonded hydroxyl group in the terminal units and has a viscosity of 50 to 100,000 mPa.s at 25 ° C., preferably in amounts of 10 to 80 percent by weight on the total weight of the respective mass
  • inorganic fillers such as pyrogenic silicon dioxide, and organic solvents.
  • the application of the masses used for the production of the coatings according to the invention on the reinforcement elements for aerated concrete can be suitable in any suitable manner for the application of liquid or pasty substances to reinforcement elements, e.g. B. by dipping, spraying, painting, pouring or rolling.
  • the masses crosslink to form organopolysiloxane elastomers. This crosslinking takes place at room temperature. You can by heating z. B. to 50 to 150 ° C, especially 70 ° C, z. B. accelerated by induction heat.
  • the coatings according to the invention preferably have a Thickness of 30 to 200 microns, especially 60 to 80 microns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Paints Or Removers (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
EP19860101072 1985-01-31 1986-01-28 Elément de renforcement pour ou dans le béton poreux à revêtement de protection anti-corrosif Withdrawn EP0189890A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503276 1985-01-31
DE19853503276 DE3503276A1 (de) 1985-01-31 1985-01-31 Durch einen ueberzug gegen korrosion geschuetzte bewehrungselemente fuer oder in porenbeton

Publications (2)

Publication Number Publication Date
EP0189890A2 true EP0189890A2 (fr) 1986-08-06
EP0189890A3 EP0189890A3 (fr) 1988-01-27

Family

ID=6261303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860101072 Withdrawn EP0189890A3 (fr) 1985-01-31 1986-01-28 Elément de renforcement pour ou dans le béton poreux à revêtement de protection anti-corrosif

Country Status (5)

Country Link
US (1) US4649066A (fr)
EP (1) EP0189890A3 (fr)
JP (1) JPS61181876A (fr)
CA (1) CA1268676A (fr)
DE (1) DE3503276A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332954A1 (fr) * 1988-03-18 1989-09-20 Proceq S.A. Elément de liaison métallique inoxydable
WO2006045398A1 (fr) * 2004-10-28 2006-05-04 Wacker-Chemie Gmbh Preparation sans chromate pour revetements anticorrosion pour metaux

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3901734A1 (de) * 1988-03-21 1989-10-05 Bauakademie Ddr Waessriges korrosionsschutzmittel fuer stahlbewehrungen autoklavisierter silikatbetone
DE4023226C1 (fr) * 1990-07-21 1992-01-23 Institut Fuer Baustoffpruefung Waldkirch Gmbh, 7808 Waldkirch, De
US9734890B1 (en) * 2016-02-15 2017-08-15 Qualcomm Incorporated Systems and methods for individually configuring dynamic random access memories sharing a common command access bus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829051A (en) * 1958-01-09 1960-02-24 Siporex Int Ab Improvements in the manufacture of reinforced light-weight concrete
US3555109A (en) * 1967-09-08 1971-01-12 Stauffer Wacker Silicone Corp In situ generation of unique particulate matter in organopolysiloxanes
US4301268A (en) * 1977-01-12 1981-11-17 Th. Goldschmidt Ag Process for the preparation of organopolysiloxanes modified with methacrylic esters
EP0093985A2 (fr) * 1982-05-06 1983-11-16 BASF Lacke + Farben AG Procédé de préparation d'un revêtement anti-corrosif

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4292423A (en) * 1979-04-19 1981-09-29 Wacker-Chemie Gmbh Process for the preparation of organopolysiloxanes
JPS58127769A (ja) * 1982-01-25 1983-07-29 Hitachi Ltd 鉄合金製構造体の腐食疲労破壊防止方法
US4435472A (en) * 1982-08-27 1984-03-06 Pennwalt Corporation Adherent, acid cured resin protective coatings for concrete and steel
DE3303649A1 (de) * 1983-02-03 1984-08-09 Wacker-Chemie GmbH, 8000 München Unter ausschluss von wasser lagerfaehige, bei zutritt von wasser bei raumtemperatur zu elastomeren vernetzende massen
DE3406266A1 (de) * 1984-02-21 1985-08-29 Wacker-Chemie GmbH, 8000 München Verfahren zur herstellung von schutzueberzuegen auf beschichtungen aus asphaltbeton und ueberzogene beschichtungen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829051A (en) * 1958-01-09 1960-02-24 Siporex Int Ab Improvements in the manufacture of reinforced light-weight concrete
US3555109A (en) * 1967-09-08 1971-01-12 Stauffer Wacker Silicone Corp In situ generation of unique particulate matter in organopolysiloxanes
US4301268A (en) * 1977-01-12 1981-11-17 Th. Goldschmidt Ag Process for the preparation of organopolysiloxanes modified with methacrylic esters
EP0093985A2 (fr) * 1982-05-06 1983-11-16 BASF Lacke + Farben AG Procédé de préparation d'un revêtement anti-corrosif

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 95, Nr. 4, 27. Juli 1981, Seite 78, Zusammenfassung Nr. 26684n, Columbus, Ohio, US; N.N. KRUGLITSKII et al.: "Anticorrosion coatings for the protection of reinforcement", & STROIT. MATER. KONSTR. 1981, (1), 9-10 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332954A1 (fr) * 1988-03-18 1989-09-20 Proceq S.A. Elément de liaison métallique inoxydable
WO2006045398A1 (fr) * 2004-10-28 2006-05-04 Wacker-Chemie Gmbh Preparation sans chromate pour revetements anticorrosion pour metaux

Also Published As

Publication number Publication date
EP0189890A3 (fr) 1988-01-27
CA1268676A (fr) 1990-05-08
US4649066A (en) 1987-03-10
DE3503276A1 (de) 1986-08-07
JPS6343433B2 (fr) 1988-08-30
JPS61181876A (ja) 1986-08-14

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Inventor name: WEGEHAUPT, KARL-HEINRICH, DR. DIPL.-CHEM.

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Inventor name: PFEFFER, HANS-RUDOLF