FR2622211A1 - Composition for the surface protection of zinc against "white rust" and corresponding processes - Google Patents
Composition for the surface protection of zinc against "white rust" and corresponding processes Download PDFInfo
- Publication number
- FR2622211A1 FR2622211A1 FR8714615A FR8714615A FR2622211A1 FR 2622211 A1 FR2622211 A1 FR 2622211A1 FR 8714615 A FR8714615 A FR 8714615A FR 8714615 A FR8714615 A FR 8714615A FR 2622211 A1 FR2622211 A1 FR 2622211A1
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- FR
- France
- Prior art keywords
- meth
- acrylate
- zinc
- composition according
- copolymer
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 38
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims description 20
- 229910052725 zinc Inorganic materials 0.000 title claims description 20
- 239000011701 zinc Substances 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 11
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 title claims description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920001577 copolymer Polymers 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 11
- 239000000178 monomer Substances 0.000 claims description 9
- 239000003599 detergent Substances 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229920001897 terpolymer Polymers 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 239000006184 cosolvent Substances 0.000 claims 1
- 229940063557 methacrylate Drugs 0.000 claims 1
- 125000005395 methacrylic acid group Chemical group 0.000 claims 1
- 230000001464 adherent effect Effects 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 238000007598 dipping method Methods 0.000 abstract 1
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2,2'-azo-bis-isobutyronitrile Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 13
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 11
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 239000012429 reaction media Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- IMONTRJLAWHYGT-ZCPXKWAGSA-N Norethindrone Acetate Chemical compound C1CC2=CC(=O)CC[C@@H]2[C@@H]2[C@@H]1[C@@H]1CC[C@](C#C)(OC(=O)C)[C@@]1(C)CC2 IMONTRJLAWHYGT-ZCPXKWAGSA-N 0.000 description 1
- 241001311547 Patina Species 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000001045 blue dye Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004924 electrostatic deposition Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N n-propyl alcohol Natural products CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- -1 polyoxyethylene Polymers 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- KIEOKOFEPABQKJ-UHFFFAOYSA-N sodium dichromate Chemical compound [Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KIEOKOFEPABQKJ-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/07—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media from polymer solutions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/064—Copolymers with monomers not covered by C09D133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
La présente invention concerne une composition et une
préparation prete à l'emploi pour la protection superficiel
le du zinc contre la "rouille blanche", qu'il s'agisse
d'articles en zinc massif ou d'articles revêtus de zinc.The present invention relates to a composition and a
ready-to-use preparation for surface protection
zinc against "white rust", whether
articles of solid zinc or articles coated with zinc.
L' invention vise également un procédé de protection. The invention also relates to a protection method.
éventuellement temporaire, du zinc contre la rouille
blanche.possibly temporary, zinc against rust
white.
Comme on le sait, le zinc est un métal très utilisé,
notamment pour la protection des aciers contre la corrosion
(galvanisation).As we know, zinc is a widely used metal,
especially for the protection of steels against corrosion
(galvanization).
En atmosphère de faible humidité relative, le zinc se
transforme superficiellement en carbonate de zinc la
"patine qui le rend peu sensible à toute corrosion
atmosphérique ultérieure. Cependant, en atmosphère humide,
acide ou tiède (cas très fréquent de stockages en reions
-industrielles ou tropicales), la -formation de carbonate de
zinc est localement remplacée par celle d'hydroxyde de zinc
hydraté, communément appelé "rouille blanche", modifiant
l'aspect de surface des pièces galvanisees et les rendent
corrodables.In an atmosphere of low relative humidity, zinc
superficially transforms into zinc carbonate
"patina which makes it not very sensitive to any corrosion
later atmospheric. However, in a humid atmosphere,
acid or lukewarm (very frequent case of storage in regions
-industrial or tropical), the -formation of carbonate
zinc is locally replaced by that of zinc hydroxide
hydrated, commonly known as "white rust", modifying
the surface appearance of the galvanized parts and make them
corrodable.
On s'est donc efforcé de protéger superficiellement le
zinc pour éviter la formation de cette rouille blanche.We therefore tried to protect the surface
zinc to prevent the formation of this white rust.
La technique antérieure la plus efficace est l'utilisa
tion d'une solution de bichromate de sodium Na2Cr2O7, qui
assure une protection jugée convenable mais dont 1' utilisa-
tio présente des risques du fait de la toxicité du Na Cr O
D'autres techniques permettent d'obtenir d'assez boxjs
résultats, en ce qui concerne la protection, mais certains
inconvénients (films huileux ou gras, inflammabilité ...) en
limitent l'utilisation.The most effective prior art is the use
tion of a solution of sodium dichromate Na2Cr2O7, which
provides protection deemed suitable but the use of which
tio presents risks due to the toxicity of Na Cr O
Other techniques allow to obtain enough boxjs
results, when it comes to protection, but some
disadvantages (oily or oily films, flammability ...) in
limit use.
L' invention a pour but de remédier à ces inconvénients,
but qui est atteint en ce sens qu'elle propose d'utiliser
pour la protection superficielle du zinc, un copolymère de
(méth)acrylate en mélange avec un acide (méth)acrylique.The object of the invention is to remedy these drawbacks,
goal which is achieved in the sense that it proposes to use
for the surface protection of zinc, a copolymer of
(meth) acrylate mixed with a (meth) acrylic acid.
La composition selon l'invention permet d'obtenir un film de protection sec, adhérent, non toxique, éventuelle ment éiiminable, utiiisabie sur des pièces chaudes ou froides, et ce, à partir d'une soiuticn homogène, ininfiammabie, facilement utilisable (par trempé, pulvérisation, etc.)
Dans ia présente description et les revendications, on entend par (méth)acrylate aussi bien un acrylate qu'un méthacrylate et par acide (méth)acryiique aussi bien 1' aci- de acrylique que l'acide méthacrylique.The composition according to the invention makes it possible to obtain a dry, adherent, non-toxic, possibly eliminable protective film, which can be used on hot or cold parts, and this, from a homogeneous, non-inflammable, easily usable product (by soaking, spraying, etc.)
In the present description and the claims, the term (meth) acrylate is understood to mean both an acrylate and a methacrylate and by (meth) acrylic acid both acrylic acid and methacrylic acid.
Par copolymère, on entend copolymère au sens larve, c est-à-dire un polymère comportant des motifs monomères d'au moins deux types. Le copolymère comportera, de préférence, des motifs de deux types, ouencore de trois types, auquel cas ii s'agira d'un terpolymère. By copolymer is meant copolymer in the larva sense, that is to say a polymer comprising monomer units of at least two types. The copolymer will preferably comprise units of two types, or again of three types, in which case it will be a terpolymer.
Dans la suite, on désignera ie copolymère de (méth)acrylate en mélange avec ;'excès d'acide (méth)acrylique par l'expression "le composant actif". In the following, the copolymer of (meth) acrylate in mixture with the excess of (meth) acrylic acid will be designated by the expression "the active component".
De préférence, ie composant actif sera en solution dans un mélange de co-soivants à prédominance aqueuse. Preferably, the active component will be in solution in a mixture of predominantly aqueous co-extractants.
Dans une forme d'exécution pratique de l'invention, ie (méth)acrylate est un (méth)acrylate -d'alk.yle inférieur en C1 à C6. In a practical embodiment of the invention, ie (meth) acrylate is a (meth) acrylate -alkyl lower in C1 to C6.
La présence d'acide (méth)acryiique confère au composant actif un indice d'acide de 50 à 150 mg KOH pour 1 g de composant, et de préférence de 90 à 120 mg de KOH pour 1 g. The presence of (meth) acrylic acid gives the active component an acid number of 50 to 150 mg KOH for 1 g of component, and preferably from 90 to 120 mg of KOH for 1 g.
Par ailleurs, le composant actif a, de préférence, une masse moléculaire moyenne en nombre Mn comprise entre 2000 et 20000 et, de préférence, entre 3000 et 5000. Furthermore, the active component preferably has a number average molecular mass Mn of between 2000 and 20,000 and preferably between 3000 and 5000.
Pour réaliser une préparation prête à l'emploi, ia composition selon l'invention est diiuée dans une solution aqueuse aminée, et de préférence, dans une solution ammoniacale ce, afin de permettre la soiubilisation du composant actif. To make a ready-to-use preparation, the composition according to the invention is diluted in an amino aqueous solution, and preferably in an ammonia solution, in order to allow the active component to be solubilized.
La teneur de la solution en composant actif est fonction de la protection désirée et du mode d'application utilisé mais, en général, elie sera comprise entre 1 à 50 g de solides pour 100 g de préparation. The content of the active ingredient in the solution depends on the desired protection and the mode of application used, but in general it will be between 1 to 50 g of solids per 100 g of preparation.
En général, la couche de protection déposée sur le zinc à traiter est prévue pour y rester à demeure. On peut cependant envisager des cas où 1' on ne cherche à obtenir qu'une protection temporaire et où le zinc doit être débarrassé de sa protection- superficielle pour, par exemple. In general, the protective layer deposited on the zinc to be treated is intended to remain there permanently. One can however envisage cases where one seeks only temporary protection and where zinc has to be stripped of its surface protection for, for example.
être recouvert d'une peinture qui n'accrocherait pas sur la couche de protection.be covered with a paint that will not hang on the protective layer.
Dans un tel cas, il est possible d'éliminer la couche de protection par réaction avec une lessive faiblement alcaline. In such a case, it is possible to remove the protective layer by reaction with a weakly alkaline detergent.
La préparation de base est incolore et transparente. Il est cependant possible d'y ajouter des ingrédients appropriés pour la rendre opaque et/ou colorée. The basic preparation is colorless and transparent. However, it is possible to add suitable ingredients to it to make it opaque and / or colored.
L'invention sera mieux comprise à la lecture des exemples ci-après. The invention will be better understood on reading the examples below.
EXEMPLE 1
Composition préparée à partir
d'acide méthacrylique et de méthacrylate de butyle
a) Synthèse du polymère
On dispose d'un tricol équipé d'une agitation, d'un thermomètre, d'une ampoule de coulée, d'une introduction d'azote et d'un réfrigérant.EXAMPLE 1
Composition prepared from
methacrylic acid and butyl methacrylate
a) Synthesis of the polymer
There is a three-necked flask equipped with a stirrer, a thermometer, a dropping funnel, a nitrogen introduction and a refrigerant.
Dans le tricol on introduit, comme milieu solvant - éther butylique de monoéthylène glycol 215,5 g - n-propanol 207 g - méthyl-4 pentanol-2 50,7 g
Sous agitation, ori porte le mélange à -OOC. In the three-necked flask, the following are introduced as solvent medium - monoethyl glycol butyl ether 215.5 g - n-propanol 207 g - 4-methyl-pentanol-2 50.7 g
With stirring, ori brings the mixture to -OOC.
Dans 1' ampoule de coulée, OI1 introduit le mélange homogène: - acide méthacrylique 77,9 g - méthacrylate de butyle 416,6 g - dodécane thiol 36,3 g - azo bis isobutyronitrile 4,57g les deux derniers composants servant, d'une manière connue en soi, d'initiateur et d'agent de transfert. In the dropping funnel, OI1 introduces the homogeneous mixture: - methacrylic acid 77.9 g - butyl methacrylate 416.6 g - dodecane thiol 36.3 g - azo bis isobutyronitrile 4.57g the last two components serving, in a manner known per se, of initiator and transfer agent.
Ce mélange est lentement introduit dans le tricol (durée de I' introduction 40 à 60 minutes), en maintenant la température du milieu réactionnel à 83 C. Après la fin de la coulée, on maintient le milieu réactionnel à 83 C durant 2h30 supplémentaires. This mixture is slowly introduced into the three-necked flask (duration of the introduction 40 to 60 minutes), while maintaining the temperature of the reaction medium at 83 C. After the end of the casting, the reaction medium is maintained at 83 C for an additional 2 h 30 min.
La solution obtenue contient 50 % de polymère dont l'indice d'acide est de 95 mg de KOH pour 1 g. The solution obtained contains 50% of polymer, the acid number of which is 95 mg of KOH per 1 g.
La masse molaire moyenne en nombre Mri est de 4000 environ. The average molar mass in number Mri is approximately 4000.
b) Solution prête à l'emploi
On introduit, sous agitation dans un tricol, 250 g de la solution issue de l'étape précédente, 750 g d'eau permutée et environ 17 g d'ammoniaque à 22 B. b) Ready-to-use solution
250 g of the solution from the previous step, 750 g of deionized water and approximately 17 g of 22 B ammonia are introduced, with stirring, into a three-necked flask.
On obtient une solution homogène dont le pH est de Q 2 l'extrait sec de 12,5 R et la viscosité en coupe consistométrique AFNOR N 2, 5 de 50 secondes environ. A homogeneous solution is obtained, the pH of which is Q 2, the dry extract of 12.5 R and the viscosity in AFNOR N 2, 5 consistometric section of approximately 50 seconds.
c) Application
La mise en oeuvre de la solution prête à l'emploi peut être faite par immersion au bain par pulvérisation avec ou sarls gaz vecteur, dépôt électrostatique, dépôt à la brosse, etc...c) Application
The use of the ready-to-use solution can be carried out by immersion in a spray bath with or with carrier gas sarls, electrostatic deposition, brush deposition, etc.
La vitesse de séchage dépend de la méthode d'applica tion utilisée. Elle varie entre 15 secondes et 30 minutes. The drying speed depends on the application method used. It varies between 15 seconds and 30 minutes.
Le film obtenu est homogène, transparent, incolore, sec et adhérent. Son épaisseur varie, selon la méthode d'application utilisée et la porosité du zinc, entre 2 à 20 microns. I1 possède une bonne résistance à l'eau. The film obtained is homogeneous, transparent, colorless, dry and adherent. Its thickness varies, depending on the application method used and the porosity of the zinc, between 2 to 20 microns. It has good water resistance.
Des essais de corrosion ont été réalisés sur un empilement de plats et de cornières d'acier galvanise, stockes sur uri parc d'une unité de galvanisation. Corrosion tests were carried out on a stack of plates and angles of galvanized steel, stored in a park of a galvanizing unit.
Les pièces, protégées par ce film quasiment invisible, présentent après plus de trois mois de stockage un bel aspect sec et peu poussiéreux. The parts, protected by this almost invisible film, present after more than three months of storage a nice dry and little dusty appearance.
Le zinc de galvanisation est vierge de rouille blanche. The galvanizing zinc is free from white rust.
Dans les mêmes conditions, une pièce galvanisée non protégée est fortement atteinte de rouille blanche. Under the same conditions, an unprotected galvanized part is strongly affected by white rust.
EXEMPLE 2
Variation sur la Mn
On opère de la même façon que pour l'exemple 1, en modifiant les proportions du mélange monomères-agent de transfert, de la façon suivante acide méthacrylique 83 g méthacrylate de butyle 416,6 g dodécane thiol 72 g azo bis isobutyronitrile 4,57g
Le polymère obtenu a un indice d'acide de 05 mg de KOH pour 1 g et une Mn de 2500.EXAMPLE 2
Variation on Mn
The procedure is the same as for Example 1, by modifying the proportions of the monomer-transfer agent mixture, in the following manner methacrylic acid 83 g butyl methacrylate 416.6 g dodecane thiol 72 g azo bis isobutyronitrile 4.57g
The polymer obtained has an acid number of 05 mg of KOH per 1 g and an Mn of 2500.
Le film obtenu à partir d'une solution préparée comme indiqué à l'exemple 1 est plus souple que celui issu de cet exemple 1 et légèrement poissant. The film obtained from a solution prepared as indicated in Example 1 is more flexible than that from this Example 1 and slightly tacky.
EXEMPLE 3
Variation sur l'indice d'acide
On opère de la même facon que pour l'exemple 1, en modifiant les proportions du mélange de monomères de la facon suivante acide méthacrylique 138 g méthacrylate de butyle 410 g dodécane thiol 40 g azo bis isobutyronitrile 4,7 g
Le mélange des solvants est ajusté pour obtenir uri extrait sec de 50 %.EXAMPLE 3
Change in acid number
The procedure is the same as for Example 1, by modifying the proportions of the monomer mixture in the following way methacrylic acid 138 g butyl methacrylate 410 g dodecane thiol 40 g azo bis isobutyronitrile 4.7 g
The mixture of solvents is adjusted to obtain a dry extract of 50%.
Le polymère obtenu a un indice d'acide de 145mg de KOH pour 1 g et une Mil de l'ordre de 4000. The polymer obtained has an acid number of 145 mg of KOH per 1 g and a Mil of the order of 4000.
Le film obtenu à partir d'une solution preparée comme à l'exemple 1 est plus dur que celui issu de cet exemple 1 et sa resistallce à l'eau est légèrement plus faible. The film obtained from a solution prepared as in Example 1 is harder than that from this Example 1 and its resistance to water is slightly lower.
EXEMPLE 4
Composition à base de terpolymère
On opère de la même façon que pour l'exemple 1, en modifiant la composition du mélange de monomères de la facon suivante acide méthacrylique 81 g méthacrylate de butyle 206 g méthacrylate d'éthyle 206 g dodécane thiol 36,3 g azo bis isobutyronitrile 4,57 g
Le polymère obtenu a un indice d'acide de 98 mg de KOH pour 1 g et une Mn de l'ordre de 4000.EXAMPLE 4
Terpolymer composition
The procedure is the same as for Example 1, by modifying the composition of the monomer mixture in the following manner methacrylic acid 81 g butyl methacrylate 206 g ethyl methacrylate 206 g dodecane thiol 36.3 g azo bis isobutyronitrile 4 , 57 g
The polymer obtained has an acid number of 98 mg of KOH per 1 g and an Mn of the order of 4000.
Le film obtenu à partir de la solution préparée comme à 1 ' exemple 1 est plus dur et légèrement moins résistant à l'eau que le film issu de l'exemple 1. The film obtained from the solution prepared as in Example 1 is harder and slightly less resistant to water than the film resulting from Example 1.
EXEMPLE ;
Variation sur le monomère acide
On opère de la même façon que pour l'exemple 1 en modifiant la composition du mélange de monomères de la façon suivante acide acrylique 66 g méthacrylate de butyle 416,6 g dodécane thiol 35,4 g azo bis isobutyronitrile 4,46 g
Le polymère obtenu a un indice d'acide de 0r mg de KOH pour 1 g est urie Mn de l'ordre de 4000. EXAMPLE;
Variation on the acid monomer
The procedure is the same as for Example 1, modifying the composition of the monomer mixture as follows: acrylic acid 66 g butyl methacrylate 416.6 g dodecane thiol 35.4 g azo bis isobutyronitrile 4.46 g
The polymer obtained has an acid number of 0 mg of KOH per 1 g and is Mn of the order of 4000.
Le film obtenu à partir de la solution préparez comme à l ' exemple 1 est plus mou et moins résistant aux intempéries que celui issu de l'exemple 1. The film obtained from the solution prepared as in Example 1 is softer and less weather resistant than that from Example 1.
EXEMPLE 6
Variation sur le monomère ester
On opère de la même facon que pour l'exemple 1 eii modifiant la composition du mélange de monomères de la façon suivante acide méthacrylique 77, Q g acrylate de n-butyle 416,6 g dodécane thiol 36,3 g azo bis isobutyronitrile 4,57 g
Le polymère obtenu a un indice d'acide de 95 mg de KOH pour 1 g et une MIl de l'ordre de 4000.EXAMPLE 6
Variation on the ester monomer
The operation is carried out in the same way as for Example 1 and modifying the composition of the mixture of monomers in the following manner methacrylic acid 77, Q g n-butyl acrylate 416.6 g dodecane thiol 36.3 g azo bis isobutyronitrile 4, 57 g
The polymer obtained has an acid number of 95 mg of KOH per 1 g and an MI1 of the order of 4000.
Le film obtenu à partir de la solution préparée comme à 1 'exemple 1 est poissant et sa résistance aux intempéries est inférieure à celle du film issu de l'exemple 1. The film obtained from the solution prepared as in Example 1 is tacky and its weather resistance is lower than that of the film from Example 1.
EXEMPLE 7
Variation sur le morIomere acide et sur l'ester
OI1 opère de la même facon que pour l'exemple 1 en modifiant la composition du mélange de monomères de la façon suivante : acide acrylique 66 g acrylate de butyle 416,6 g dodécane thiol 36,3 g azo bis isobutyronitrile 4,57 g
Le polymère obtenu a un indice d'acide de 05 mg de KOH pour 1 g et une Mn de l'ordre de 4000.EXAMPLE 7
Variation on the acidic morIomer and on the ester
OI1 operates in the same way as for Example 1, by modifying the composition of the mixture of monomers as follows: acrylic acid 66 g butyl acrylate 416.6 g dodecane thiol 36.3 g azo bis isobutyronitrile 4.57 g
The polymer obtained has an acid number of 05 mg of KOH per 1 g and an Mn of the order of 4000.
Le film obtenu à partir de la solution préparée comme à l'exemple 1 est poissant et sa résistance aux intempéries est inférieure à celle du film issu de l'exemple 1. The film obtained from the solution prepared as in Example 1 is tacky and its weather resistance is lower than that of the film from Example 1.
EXEMPLE 8
Protection temporaire et élimination du film
Une pièce de zinc est revêtue de polymère suivait l'exemple 1. Après une période de stockage de trois mois. on élimine le film en deux minutes environ au moyen d'une solution de détergent alcalin de composition suivante sel tétrasodique de L'ENTA 0,2 nonyl phénol polyoxyéthylène (10 OE) 0,5 triéthanolamine 2 ether de glycol 1 eau qsq 100 g
EXEMPLE o
Préparation d'un film coloré
On obtient un film colore en introduisant dans la solution suivant l'exemple 1, 1 7 de colorant bleu Irganol.EXAMPLE 8
Temporary protection and elimination of the film
A piece of zinc coated with polymer followed Example 1. After a storage period of three months. the film is removed in about two minutes using an alkaline detergent solution of the following composition ENTA tetrasodium salt 0.2 nonyl phenol polyoxyethylene (10 EO) 0.5 triethanolamine 2 glycol ether 1 water qsq 100 g
EXAMPLE o
Preparation of colored film
A colored film is obtained by introducing into the solution according to Example 1, 1 7 of Irganol blue dye.
EXEMPLE 10
Préparation d'un film opaque
On obtint un film opaque en introduisant dans la solution suivant l'exemple 1, 5 % d'oxyde de titane préalablement broyé dans la solution concentrée de polymère. EXAMPLE 10
Preparation of an opaque film
An opaque film was obtained by introducing into the solution according to Example 1, 5% of titanium oxide previously ground in the concentrated polymer solution.
Claims (14)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8714615A FR2622211B1 (en) | 1987-10-22 | 1987-10-22 | COMPOSITION FOR THE SURFACE PROTECTION OF ZINC AGAINST "WHITE RUST" AND METHODS THEREOF |
FR8809818A FR2634499A2 (en) | 1987-10-22 | 1988-07-20 | COMPOSITION FOR THE SUPERFICIAL PROTECTION OF ZINC AGAINST "WHITE RUST" AND METHODS THEREOF |
DE8888402607T DE3870572D1 (en) | 1987-10-22 | 1988-10-14 | COMPOSITION FOR THE SURFACE PROTECTION OF ZINC AGAINST "WHITE RUST" AND RELATED PROCEDURES. |
AT88402607T ATE75489T1 (en) | 1987-10-22 | 1988-10-14 | COMPOSITION FOR SURFACE PROTECTION OF ZINC AGAINST ''WHITE RUST'' AND RELATIVE PROCESSES. |
ES198888402607T ES2032585T3 (en) | 1987-10-22 | 1988-10-14 | COMPOSITION FOR THE SURFACE PROTECTION OF THE ZINC AGAINST THE "WHITE HERRUMBRE" AND CORRESPONDING PROCEDURES. |
EP88402607A EP0313447B1 (en) | 1987-10-22 | 1988-10-14 | Composition for the surface protection of zinc against "white rust" and corresponding methods |
US07/257,828 US5045361A (en) | 1987-10-22 | 1988-10-14 | Process of preparation for the surface protection of zinc against white rust |
CA000580872A CA1319222C (en) | 1987-10-22 | 1988-10-21 | Zinc white rust surface protection compositions; preparation processes therefor |
US07/563,194 US5037877A (en) | 1987-10-22 | 1990-08-06 | Polymer based preparation for the surface protection of zinc against white rust |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8714615A FR2622211B1 (en) | 1987-10-22 | 1987-10-22 | COMPOSITION FOR THE SURFACE PROTECTION OF ZINC AGAINST "WHITE RUST" AND METHODS THEREOF |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2622211A1 true FR2622211A1 (en) | 1989-04-28 |
FR2622211B1 FR2622211B1 (en) | 1994-04-08 |
Family
ID=9356075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8714615A Expired - Fee Related FR2622211B1 (en) | 1987-10-22 | 1987-10-22 | COMPOSITION FOR THE SURFACE PROTECTION OF ZINC AGAINST "WHITE RUST" AND METHODS THEREOF |
Country Status (1)
Country | Link |
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FR (1) | FR2622211B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2958611A (en) * | 1956-10-05 | 1960-11-01 | Minnesota Mining & Mfg | Priming of zinc surfaces |
US4139514A (en) * | 1977-06-29 | 1979-02-13 | Union Carbide Corporation | Aqueous vehicles |
EP0115694A2 (en) * | 1983-01-12 | 1984-08-15 | Imperial Chemical Industries Plc | Compositions for producing on a substrate a temporary protective coating subsequently removable with aqueous alkali |
-
1987
- 1987-10-22 FR FR8714615A patent/FR2622211B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2958611A (en) * | 1956-10-05 | 1960-11-01 | Minnesota Mining & Mfg | Priming of zinc surfaces |
US4139514A (en) * | 1977-06-29 | 1979-02-13 | Union Carbide Corporation | Aqueous vehicles |
EP0115694A2 (en) * | 1983-01-12 | 1984-08-15 | Imperial Chemical Industries Plc | Compositions for producing on a substrate a temporary protective coating subsequently removable with aqueous alkali |
Also Published As
Publication number | Publication date |
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FR2622211B1 (en) | 1994-04-08 |
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