DK160261B - PROCEDURE FOR COATING A METAL OBJECTIVE WITH A FLUORCARBON POLYMER-BASED COATING - Google Patents
PROCEDURE FOR COATING A METAL OBJECTIVE WITH A FLUORCARBON POLYMER-BASED COATING Download PDFInfo
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- DK160261B DK160261B DK535274A DK535274A DK160261B DK 160261 B DK160261 B DK 160261B DK 535274 A DK535274 A DK 535274A DK 535274 A DK535274 A DK 535274A DK 160261 B DK160261 B DK 160261B
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- 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
- C09D157/00—Coating compositions based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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- 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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions 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; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/064—Copolymers with monomers not covered by C08L33/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
DK 160261 BDK 160261 B
Den foreliggende opfindelse angår en fremgangsmåde til overtrækning af en metalgenstand med et på fluorcarbonpoly-mere baseret overtræk, nærmere betegnet med et grunderovertræk og derover et topovertræk.The present invention relates to a method for coating a metal article with a fluorocarbon polymer-based coating, more particularly with a primer coating and, moreover, a topcoating.
5 Kogegrej overtrukket med fluorcarbonpolymere af for skellig art har i de senere år fundet udstrakt anvendelse, idet næsten enhver husmor foretrækker at anvende sådant kogegrej i sit køkken, fordi maden er mindre tilbøjelig til at hænge fast til det, og fordi det er så let at rengøre.5 Cookware coated with fluorocarbon polymers of different kinds has found widespread use in recent years, with almost every housewife preferring to use such cookware in his kitchen because the food is less likely to stick to it and because it is so easy to clean.
10 Den foreliggende opfindelse er baseret på den erken delse, at den fluorcarbonpolymer-film, der danner topovertrækket på sådant kogegrej, kan gøres tættere og mindre porøs, og at dette gør tingene endnu lettere at rengøre og forbedrer deres udseende ved at gøre det blankere.The present invention is based on the recognition that the fluorocarbon polymer film which forms the topcoat on such cookware can be made denser and less porous and this makes things even easier to clean and improve their appearance by making it shiny.
15 Disse fordele opnås ved, at man i stedet for den sædvanlige emalje til fluorcarbonpolymer-kogegrej anvender en kombination af et grunderovertræk og et topovertræk, der som hovedbestanddele indeholder en fluorcarbonpolymer, en polymer tilsætning med specielle fysiske egenskaber og en 20 flydende bærer, idet nemlig den her omhandlede fremgangsmåde er ejendommelig ved, at der (a) som grunderovertræk påføres et produkt, der omfatter (1) 30-90%, beregnet på vægten af de samlede tørstoffer (1) og (2), af en polymer af carbonhydridmonomere, 25 der er fuldstændig substitueret med fluoratomer eller en kombination af fluor- og chloratomer, (2) 10-70%, beregnet på vægten af de samlede tørstoffer (1) og (2), af et kolloidt siliciumoxid med et sili-ciumoxidindhold på 30% og en pH-værdi på 9,0 ved 30 25°C, hvis partikler er overflademodificeret med aluminium og har en størrelse på 13-14 jum og et sepci-fikt overfladeareal på 210-230 m.2/g, og (3) en flydende bærer, 35 og at der derover (b) som topovertræk påføres et produkt, der omfatterThese advantages are obtained by using, instead of the usual enamel for fluorocarbon polymer cookware, a combination of a primer coating and a topcoat containing, as the main constituents, a fluorocarbon polymer, a polymeric additive with special physical properties and a liquid carrier, namely the process of the present invention is characterized in that (a) as a primer coating a product comprising (1) 30-90% by weight of the total solids (1) and (2) of a hydrocarbon monomer polymer is applied, 25 which is completely substituted by fluorine atoms or a combination of fluorine and chlorine atoms, (2) 10-70%, by weight of the total solids (1) and (2), of a colloidal silica having a silica content of 30 % and a pH of 9.0 at 25 ° C, the particles of which are surface-modified with aluminum and having a size of 13-14 µm and a septic surface area of 210-230 m 2 / g, and (3 ) a liquid carrier, 35 and that, in addition, (b) as a top coat is applied a product comprising
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2 (4) 25—95%, beregnet på vægten af de samlede tørstoffer i (4) og (5), af en polymer som i (a) (1), (5) 5-75%, beregnet på vægten af de samlede tørstoffer i (4) og (5), af en polymer af ethylenisk umættede 5 monomere, der indeholder én eller flere monoethylenisk umættede syreenheder, og (6) en flydende bærer, hvorhos begge overtræk (a) og (b) hærdes.2 (4) 25-95%, based on the weight of the total solids in (4) and (5), of a polymer as in (a) (1), (5) 5-75%, based on the weight of the total solids in (4) and (5), of a polymer of ethylenically unsaturated 5 monomers containing one or more monoethylenically unsaturated acid units, and (6) a liquid carrier, both coatings (a) and (b) being cured.
10 Grunderovertræksmaterialer af den under (a) angivne art er beskrevet i f.eks. US patentskrifterne nr. 3.694.392 og 3.655.604, medens topovertræksmaterialer af den under (b) angivne art er beskrevet i f.eks. US patentskrifterne nr. 3.340.216 og 3.526.532. Derimod er der ikke beskrevet 15 overtræk bestående af de to overtrækstyper i kombination, ligesom det ikke har kunnet forudses, at netop denne kombination vil give særlige fordele.Primer coating materials of the kind specified in (a) are described in e.g. U.S. Patent Nos. 3,694,392 and 3,655,604, while top coat materials of the kind specified in (b) are described in e.g. U.S. Patent Nos. 3,340,216 and 3,526,532. In contrast, no 15 coatings consisting of the two coating types in combination have been described, nor has it been foreseen that this particular combination will offer any particular advantages.
Den særlige betydning af den her omhandlede fremgangsmåde beror på udvælgelsen af de bestanddele, som indgår 20 i overtrækkene (a) og (b). Formålet har, som også ovenfor berørt, været at gøre topovertrækket (b) tættere og mindre porøst, og bestanddelen (5) er udvalgt med henblik på opnåelse af et kraftigt sammenløbet (koalesceret) topovertræk. Dette formål kan kun opnås, hvis tillige grunderover-25 trækket (a) ikke udvikler for mange bobler, fordi sådanne bobler ikke kan undslippe tilstrækkelig let og fuldstændigt gennem et koalesceret topovertræk, og derfor er bestanddelene i grunderovertrækket (a) netop udvalgt med henblik på opnåelse af en nedsat bobledannelsestendens. Kun med den kom-30 bination af bestanddelene (a) og (b), som anvendes ved den her omhandlede fremgangsmåde, opnår man både nedsat bobledannelse i grunderovertrækket og mindre porøst topovertræk.The particular importance of the process herein depends on the selection of the constituents included in coatings (a) and (b). The purpose, as also above, has been to make the topcoat (b) denser and less porous, and the component (5) is selected in order to obtain a strongly coalesced (topcoated) topcoat. This object can only be achieved if the primer coating (a) does not develop too many bubbles because such bubbles cannot escape sufficiently and completely through a coalesced topcoat, and therefore the constituents of the primer coating (a) are precisely selected for achieving a decreased bubble formation trend. Only with the combination of constituents (a) and (b) used in the process of this invention, both reduced bubble formation in the primer coating and less porous topcoat is achieved.
Eksempler på polymere til anvendelse ved fremgangsmåden ifølge opfindelsen som bestandddelene (1) og (4) er 35 polytetrafluorethylen (PTFE), copolymere af tetrafluore-thylen og hexafluorpropylen i alle vægtforhold mellem deExamples of polymers for use in the process of the invention as constituents (1) and (4) are polytetrafluoroethylene (PTFE), tetrafluoroethylene and hexafluoropropylene copolymers in all weight ratios
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3 monomere (FEP) og fluorchlorcarbonpolymere, såsom polymono-chlortrifluorethylen. Heraf foretrækkes PTFE.3 monomers (FEP) and fluorochlorocarbon polymers such as polymonochlorotrifluoroethylene. Of these, PTFE is preferred.
De anvendte fluorcarbonpolymere (1) og (4) er partikelformede, og partiklerne bør være tilstrækkeligt små 5 til at kunne passere gennem dysen på en sprøjtepistol uden at tilstoppe den og desuden tilstrækkeligt små til at give den fremkomne film integritet. Almindeligvis bør partiklerne ikke være større end ca. 0,35 μτα i deres længste dimension.The fluorocarbon polymers (1) and (4) used are particulate, and the particles should be sufficiently small to pass through the nozzle of a spray gun without clogging it and, furthermore, sufficiently small to give the resulting film integrity. Generally, the particles should not be greater than about 0.35 μτα in their longest dimension.
Selv om der kan anvendes et tørt mel eller pulver af 10 fluorcarbonpolymeren (1) og (4), foretrækkes det at anvende polymeren i form af en vandig dispersion, fordi den er lettest at opnå i denne form. Der kan også anvendes dispersioner af fluorcarbonpolymer i organiske væsker, der er blandbare med vand, såsom ethanol, isopropanol, acetone og cellosolver.Although a dry flour or powder of the fluorocarbon polymer (1) and (4) can be used, it is preferred to use the polymer in the form of an aqueous dispersion because it is most readily obtainable in this form. Fluorocarbon polymer dispersions can also be used in water-miscible organic liquids such as ethanol, isopropanol, acetone, and cellos solvents.
15 I begge tilfælde tjener væsken også som bærer for produktet.In both cases, the liquid also serves as a carrier for the product.
Fluorcarbonpolymeren (4) findes i topovertrækket (b) i en mængde på fra 25 til 95 vægt-%, beregnet på den samlede mængde tørstof i fluorcarbonpolymer (4) og tilsætningspolymer (5). Fortrinsvis ligger indholdet af fluorcarbonpolymer på 20 mellem 85 og 89 vægt-%.The fluorocarbon polymer (4) is present in the top coat (b) in an amount of from 25 to 95% by weight, based on the total amount of dry matter in fluorocarbon polymer (4) and additive polymer (5). Preferably, the content of fluorocarbon polymer is between 85 and 89% by weight.
Bredt angivet kan tilsætningspolymeren (5) være en hvilken som helst polymer af ethylenisk umættede monomere, der indeholder én eller flere ethylenisk umættede syreenheder, og som depolymeriserer, idet dens depolymerisationspro-25 dukter fordamper i temperaturområdet fra ca. 150°C under fusionstemperaturen for den anvendte fluorcarbonpolymere (4) til ca. sønderdelingstemperaturen for fluorcarbonpolymeren. Jo tættere depolymerisations- og fordampnings temperaturen ligger ved fluorcarbonets fusionstemperatur, des bedre.Broadly speaking, the addition polymer (5) can be any polymer of ethylenically unsaturated monomers containing one or more ethylenically unsaturated acid units and which depolymerize, with its depolymerization products evaporating in the temperature range of about 5%. 150 ° C below the fusion temperature of the fluorocarbon polymer used (4) to approx. the decomposition temperature of the fluorocarbon polymer. The closer the temperature of the depolymerization and evaporation is at the fusion temperature of the fluorocarbon, the better.
30 Med ,,depolymerisation,, menes sønderdeling af polymeren til det punkt, hvor sønderdelingsprodukterne er flygtige ved de temperaturer, der optræder ved hærdning af filmen.By "depolymerization" is meant decomposition of the polymer to the point where the decomposition products are volatile at the temperatures encountered in curing the film.
Disse sønderdelingsprodukter kan være monomere, dimere eller oligomere.These decomposition products may be monomeric, dimeric or oligomeric.
35 Med "fordampning" menes omdannelse af sønderdelings produkterne til damp og deres afdampning fra filmen. IdeeltBy "evaporation" is meant the conversion of the decomposition products into steam and their evaporation from the film. ideally
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4 skulle alle sønderdelingsprodukter forsvinde fra filmen, men i praksis bliver der almindeligvis en lille, men vibetydelig mængde tilbage.4, all decomposition products should disappear from the film, but in practice a small but significant amount is usually left.
Eksempler på disse ethylenisk umættede monomere (5) 5 er alkylacrylater og -methacrylater med 1-8 carbonatomer i alkylgruppen, samt styren, a-methylstyren, vinyltoluen og glycidylestere med 1-14 carbonatomer. Heraf foretrækkes alkylacrylaterne og -methacrylaterne.Examples of these ethylenically unsaturated monomers (5) 5 are alkyl acrylates and methacrylates of 1-8 carbon atoms in the alkyl group, as well as styrene, α-methylstyrene, vinyltoluene and glycidyl esters of 1-14 carbon atoms. Of these, the alkyl acrylates and methacrylates are preferred.
Eksempler på de monoethylenisk umættede syrer er 10 acrylsyre, methacryl syre, fumarsyre, itaconsyre og maleinsyre (eller anhydriderne). Heraf foretrækkes acrylsyre og methacryl syre .Examples of the monoethylenically unsaturated acids are acrylic acid, methacrylic acid, fumaric acid, itaconic acid and maleic acid (or the anhydrides). Of these, acrylic acid and methacrylic acid are preferred.
Den foretrukne glyc idyl ester-enhed er den, som afledes fra et produkt, der fås fra Shell Chemical Co., som "Car-15 dura®EM-ester, og som er en blandet ester med den almene formel O OR1 / \ II / , h2c - ch - ch2 - o- c- c-r2 20 \ R3 hvor R1 er CH3, og R2 og R3 er lavere alkylgrupper, idet r1, R2 og R3 i alt indeholder 7-9 carbonatomer.The preferred glyc idyl ester unit is that derived from a product obtained from Shell Chemical Co., as "Car-dura® EM ester, and which is a mixed ester of the general formula O OR1 / \ II /, h 2c - ch - ch 2 - o - c - c - r 2 where R 1 is CH 3 and R 2 and R 3 are lower alkyl groups, with R 1, R 2 and R 3 in total containing 7-9 carbon atoms.
De foretrukne tilsætningspolymere er følgende: 25 1. Methylmethacrylat/2-ethylhexylacrylat/methacrylsyre-ter- polymere, fortrinsvis terpolymerene med vægtforholdene 46-50/48-52/1-4.The preferred addition polymers are as follows: 1. Methyl methacrylate / 2-ethylhexyl acrylate / methacrylic acid terpolymer, preferably the terpolymers having weight ratios 46-50 / 48-52 / 1-4.
2. Butylacrylat/methylmethacrylat/"Cardura®E,,/acrylsyre-quadripolymere, fortrinsvis quadripolymere med vægtforhol- 30 dene 23-27/33-37/21-25/15-19.2. Butyl acrylate / methyl methacrylate / "Cardura®E" / acrylic acid quadripolymers, preferably quadripolymers having weight ratios 23-27 / 33-37 / 21-25 / 15-19.
3. Styren/methylmethacrylat/,,Cardura®E,,/acrylsyre-quadri-polymere, fortrinsvis med vægtforholdene 28-32/28-32/21-25/15-19.3. Styrene / methyl methacrylate / ,, Cardura®E ,, / acrylic acid quadri polymers, preferably with weight ratios 28-32 / 28-32 / 21-25 / 15-19.
4. Methylmethacarylat/ethylacrylat/methacrylsyre-terpolymere, 35 fortrinsvis med vægtforholdene 37-41/55-59/1-6.4. Methylmethacarylate / ethylacrylate / methacrylic acid terpolymer, preferably with weight ratios 37-41 / 55-59 / 1-6.
Tilsætningspolymeren (5) findes i topovertrækket (b) i en koncentration på mellem 5 og 75 vægt-% af det samlede tørstofindhold af fluorcarbonpolymer (4) og tilsætningspolyThe addition polymer (5) is found in the top coat (b) at a concentration of between 5 and 75% by weight of the total solids content of fluorocarbon polymer (4) and addition polymer
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5 mer (5), og fortrinsvis ligger mængden på mellem 5 og 15, især mellem 11 og 15 vægt-%.And preferably the amount is between 5 and 15, especially between 11 and 15% by weight.
Disse tilsætningspolymere kan fremstilles efter en hvilken som helst konventionel teknik med frie radikaler, 5 således som det vil være nærliggende for enhver polymerkemiker. Polymerene kan også indeholde sådanne sædvanlige additiver som pigmenter, fyldstoffer, reguleringsmidler for flydeevnen og blødgøringsmidler, efter hvad der synes nødvendigt eller ønskeligt. Disse additiver tilsættes af de sædvan-10 lige grunde, på sædvanlig måde og i sædvanlige mængder.These additive polymers can be prepared by any conventional free radical technique as will be readily apparent to any polymer chemist. The polymers may also contain such usual additives as pigments, fillers, flowability regulators and plasticizers, as deemed necessary or desirable. These additives are added for the usual reasons, in the usual manner and in the usual amounts.
Topovertræksmaterialet (b) fremstilles, ved at man først vælger fluorcarbonpolymeren (4), tilsætningspolymeren (5) og sådanne sædvanlige additiver, som kan anvendes, og de mængder af disse, der er bedst egnet til formålet. Dette 15 kan gøres uden besvær af enhver sagkyndig, og selve fremstillingen består derefter i en grundig sammenblanding af disse komponenter under anvendelse af en flydende bærer (6) .The topcoat material (b) is prepared by first selecting the fluorocarbon polymer (4), the additive polymer (5), and such usual additives as may be used, and the amounts thereof most suitable for the purpose. This can be done without the hassle of any expert, and the preparation itself then consists in a thorough mixing of these components using a liquid carrier (6).
Fremgangsmåden ifølge opfindelsen har sin særlige 20 betydning ved topovertrækning af metalkogegrej, især stegepander, men den kan lige så vel anvendes til overtrækning af andet kogegrej eller af andre metalgenstande, der kræver glansfulde overflader, såsom lejer, ventiler, metaltråd, metalfolie, kedler, rør, skibsbunde, ovnforinger, jernbund-25 plader, vaffeljern, isterningsbakker, sneskovle og -plove, slidsker, transportører, stempler og værktøj, såsom save, file og bor, samt tilføringstragte og andre industrielle beholdere og forme.The method of the invention has its particular significance in top coating metal cookware, especially frying pans, but it can equally be used for coating other cookware or other metal objects requiring glossy surfaces such as bearings, valves, metal wire, metal foil, boilers, pipes , ship bottoms, furnace liners, iron bottom plates, waffle iron, ice cube trays, snow blades and plows, abrasives, conveyors, pistons and tools such as saws, files and drills, as well as hoppers and other industrial containers and molds.
Ved fremgangsmåden ifølge opfindelsen kan overtrækkene 30 (a) og (b) påføres på enhver sædvanlig måde, og sprøjtning, valseovertrækning, neddypning og påføring med rakel er alle anvendelige, men sprøjtning er almindeligvis den metode, der vælges. Den genstand, der skal overtrækkes, forbehandles fortrinsvis ved sandblæsning, flammesprøjtning af metaller 35 eller fritteovertrækning, og derefter grundes den med overtrækket (a), f.eks. af den type, der er beskrevet i US pa- 6In the method of the invention, coatings 30 (a) and (b) can be applied in any conventional manner, and spraying, roller coating, immersion, and application by rakel are all applicable, but spraying is generally the method of choice. The article to be coated is preferably pre-treated by sandblasting, flame spraying of metals or frit coating, and then primed with the coating (a), e.g. of the type described in U.S. Pat
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tentskrift nr. 3.694.392.tent document No. 3,694,392.
Ved fremgangsmåden ifølge opfindelsen påføres overtrækket almindeligvis i en tykkelse på mellem 0,0127 og 0,127 mm (i tør tilstand) og ovntørres derefter i mellem 5 1/2 og 30 minutter ved en temperatur på mellem 370 og 460'C.In the process of the invention, the coating is generally applied at a thickness of between 0.0127 and 0.127 mm (in dry state) and then oven dried for between 5 1/2 and 30 minutes at a temperature between 370 and 460 ° C.
De følgende eksempler skal tjene til nærmere illustrering af opfindelsen.The following examples are intended to further illustrate the invention.
Eksempel 1 10 Et repræsentativt topovertræksmateriale til anvendelse ved fremgangsmåden ifølge opfindelsen fremstilles på følgende måde: (1) 411 vægtdele af en vandig PTFE-dispersion med 60% tørstof sammenblandes med 72 vægtdele vand. (2) Særskilt sammenblandes 12 vægtdele triethanolamin, 6 vægtdele oliesy-15 re, 40,2 vægtdele toluen og 7,2 vægtdele butylcarbitol. (3)Example 1 A representative top coat material for use in the process of the invention is prepared as follows: (1) 411 parts by weight of an aqueous PTFE dispersion with 60% solids are mixed with 72 parts by weight of water. (2) In particular, 12 parts by weight of triethanolamine, 6 parts by weight of oleic acid, 40.2 parts by weight of toluene and 7.2 parts by weight of butyl carbitol are mixed together. (3)
En formalingsbasis fremstillet ved sammenblanding og formaling i kuglemølle af 67 vægtdele vand, 20 vægtdele sod, 3 vægtdele natriumpolynaphthalensulfonat og 10 vægtdele alumi-niumsilicat. Derefter sammenblandes (1) og (2) grundigt, og 20 til blandingen sættes under omrøring 90 vægtdele af en vandig dispersion med 40% tørstof af en methylmethacrylat/ethylacry-lat/methacrylsyre-terpolymer med vægtforholdet 39/57/4. X denne blanding indrøres derefter 37,2 dele af (3), og det fremkomne produkt sprøjtes på en fritteovertrukket aluminium-25 pande, der er grundet med en grunder af den i US patentskrift nr. 3.694.392 beskrevne type, i en tykkelse på 0,020-0,025 mm i tør tilstand. Derefter ovntørres panden i 5 minutter ved 430°C, og der fås hermed en finish, der er glansfuld og tæt.A grinding base made by mixing and grinding in a ball mill of 67 parts by weight of water, 20 parts by weight of soot, 3 parts by weight of sodium polynaphthalene sulfonate and 10 parts by weight of aluminum silicate. Then (1) and (2) are thoroughly mixed and 20 to the mixture is added with stirring 90 parts by weight of an aqueous dispersion with 40% solids of a methyl methacrylate / ethyl acrylate / methacrylic acid terpolymer having a weight ratio of 39/57/4. X this mixture is then stirred 37.2 parts of (3) and the resulting product is sprayed onto a fryer coated aluminum pan, primed with a primer of the type described in U.S. Patent No. 3,694,392, to a thickness of 0.020-0.025 mm in dry state. The pan is then oven-dried for 5 minutes at 430 ° C, giving a glossy and dense finish.
3030
Eksempel 2Example 2
Eksempel 1 gentages med undtagelse af, at der i stedet for den dér anvendte grunder anvendes en grunder fremstillet på følgende måde: (1) Der sammenblandes 478,76 vægtdele af 35 en vandig PTFE-dispersion med 60% tørstof, 130,23 vægtdele deioniseret vand og 327,18 vægtdele kolloid silicasol ("LudoxExample 1 is repeated except that instead of the primer used there is used a primer prepared as follows: (1) 478.76 parts by weight of an aqueous PTFE dispersion are mixed with 60% dry matter, 130.23 parts by weight deionized water and 327.18 parts by weight of colloidal silica sol ("Ludox
DK 160261 BDK 160261 B
7 AM") med 30% tørstof i vand. (2) Særskilt sammenblandes 17,52 vægtdele "Triton®X-100" (ikke-ionogent overfladeaktivt middel fra Rohm and Haas Co.), 34,56 vægtdele toluen, 13,36 vægtdele butylcarbitol og 34,56 vægtdele silicon (Dow-Coming 5 DC-801, 60% tørstof i xylen). Der sættes derefter 85,52 vægtdele af (2) til (1) i en lille strøm over et tidsrum på 2-3 minutter under omrøring, og derefter tilsættes under omrøring 35,46 vægtdele T1O2 (45% tørstof i vand) og 0,85 vægtdele sod (22% tørstof i vand), og omrøringen fortsættes 10 i 10-20 minutter.(7) 17.52 parts by weight of "Triton® X-100" (non-ionic surfactant from Rohm and Haas Co.), 34.56 parts by weight of toluene, 13.36 parts by weight of butyl carbitol and 34.56 parts by weight of silicone (Dow-Coming 5 DC-801, 60% solids in xylene), then 85.52 parts by weight of (2) to (1) are added in a small stream over a period of 2-3 35.46 parts by weight of T1O2 (45% solids in water) and 0.85 parts by weight of soot (22% solids in water) are added while stirring is continued for 10-20 minutes.
Dette produkt sprøjtes på en fritte-overtrukket aluminiumpande som den i eksempel 1 anvendte til en tykkelse på 0,005-0,015 mm i tør tilstand og lufttørres.This product is sprayed onto a frit coated aluminum pan as used in Example 1 to a thickness of 0.005-0.015 mm in dry state and air dried.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40579973A | 1973-10-12 | 1973-10-12 | |
| US40579973 | 1973-10-12 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK535274A DK535274A (en) | 1975-06-09 |
| DK160261B true DK160261B (en) | 1991-02-18 |
| DK160261C DK160261C (en) | 1991-07-22 |
Family
ID=23605288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK535274A DK160261C (en) | 1973-10-12 | 1974-10-11 | PROCEDURE FOR COATING A METAL OBJECTIVE WITH A FLUORCARBON POLYMER-BASED COATING |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS542657B2 (en) |
| BE (1) | BE820968A (en) |
| BR (1) | BR7408499D0 (en) |
| CA (1) | CA1046359A (en) |
| DE (1) | DE2448634C2 (en) |
| DK (1) | DK160261C (en) |
| FR (1) | FR2247517B1 (en) |
| GB (1) | GB1482652A (en) |
| IE (1) | IE41763B1 (en) |
| IT (1) | IT1022823B (en) |
| LU (1) | LU71086A1 (en) |
| NL (1) | NL179213C (en) |
| SE (1) | SE7412769L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2449306A (en) * | 2007-05-18 | 2008-11-19 | Univ Sheffield | Composite particles |
| FR3083682B1 (en) * | 2018-07-12 | 2020-12-11 | Ethera | ANTI-ODOR COVER |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2718452A (en) * | 1950-06-30 | 1955-09-20 | Du Pont | Polytetrafluoroethylene organosols and the formation of shaped articles therefrom |
| US2825664A (en) * | 1954-01-21 | 1958-03-04 | Du Pont | Polytetrafluoroethylene coating compositions containing an alkali metal silicate and colloidal silica and articles coated therewith |
| JPS4851033A (en) * | 1971-10-28 | 1973-07-18 |
-
1974
- 1974-10-10 SE SE7412769A patent/SE7412769L/xx unknown
- 1974-10-10 IE IE2100/74A patent/IE41763B1/en unknown
- 1974-10-11 BR BR8499/74A patent/BR7408499D0/en unknown
- 1974-10-11 NL NLAANVRAGE7413433,A patent/NL179213C/en not_active IP Right Cessation
- 1974-10-11 GB GB44147/74A patent/GB1482652A/en not_active Expired
- 1974-10-11 LU LU71086A patent/LU71086A1/xx unknown
- 1974-10-11 DK DK535274A patent/DK160261C/en not_active IP Right Cessation
- 1974-10-11 DE DE2448634A patent/DE2448634C2/en not_active Expired
- 1974-10-11 BE BE149440A patent/BE820968A/en not_active IP Right Cessation
- 1974-10-11 CA CA211,331A patent/CA1046359A/en not_active Expired
- 1974-10-11 IT IT28359/74A patent/IT1022823B/en active
- 1974-10-12 JP JP11685474A patent/JPS542657B2/ja not_active Expired
- 1974-10-14 FR FR7434499A patent/FR2247517B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7412769L (en) | 1975-05-28 |
| DK535274A (en) | 1975-06-09 |
| LU71086A1 (en) | 1975-06-24 |
| JPS542657B2 (en) | 1979-02-10 |
| DE2448634C2 (en) | 1983-01-20 |
| IE41763L (en) | 1975-04-12 |
| AU7417974A (en) | 1976-04-15 |
| FR2247517B1 (en) | 1983-08-19 |
| BR7408499D0 (en) | 1975-09-16 |
| NL179213B (en) | 1986-03-03 |
| IE41763B1 (en) | 1980-03-26 |
| CA1046359A (en) | 1979-01-16 |
| GB1482652A (en) | 1977-08-10 |
| FR2247517A1 (en) | 1975-05-09 |
| JPS5088128A (en) | 1975-07-15 |
| NL179213C (en) | 1986-08-01 |
| NL7413433A (en) | 1975-04-15 |
| IT1022823B (en) | 1978-04-20 |
| BE820968A (en) | 1975-04-11 |
| DK160261C (en) | 1991-07-22 |
| DE2448634A1 (en) | 1975-04-24 |
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| Date | Code | Title | Description |
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| PBP | Patent lapsed |