WO1997013589A1 - Systeme de revetement anticorrosion - Google Patents

Systeme de revetement anticorrosion Download PDF

Info

Publication number
WO1997013589A1
WO1997013589A1 PCT/US1996/015248 US9615248W WO9713589A1 WO 1997013589 A1 WO1997013589 A1 WO 1997013589A1 US 9615248 W US9615248 W US 9615248W WO 9713589 A1 WO9713589 A1 WO 9713589A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
epoxy
epoxy resin
adhesion promoter
coating system
Prior art date
Application number
PCT/US1996/015248
Other languages
English (en)
Other versions
WO1997013589B1 (fr
Inventor
Richard M. Bymark
Kam C. Wu
Anne F. Miniely
Original Assignee
Minnesota Mining And Manufacturing Company
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 Minnesota Mining And Manufacturing Company filed Critical Minnesota Mining And Manufacturing Company
Publication of WO1997013589A1 publication Critical patent/WO1997013589A1/fr
Publication of WO1997013589B1 publication Critical patent/WO1997013589B1/fr

Links

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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
    • C08J5/128—Adhesives without diluent
    • 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
    • B05D7/14—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 to metal, e.g. car bodies
    • B05D7/148—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 to metal, e.g. car bodies using epoxy-polyolefin systems in mono- or multilayers
    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins

Definitions

  • the invention relates to corrosion protection of metal surfaces, especially steel pipes and reinforcing bars, by forming a multilayer polymeric coating over the metal wherein a strong bond develops between polymer layers rendering the use of tie layers unnecessary.
  • Composite coating systems comprise multiple layers of material coated atop each other over a metal substrate to form a moisture barrier that protects the metal from corrosion. These coating systems are well known in industries providing pipes, pipelines, rebar, and the like. Corrosion barriers for modern pipes and other metal products typically involve such composite construction. This is an increasing trend. Current composite coating systems typically comprise three layers, each contributing a particular benefit to the coating system as a whole.
  • the underlayer or primer layer i.e., the layer contacting the metal, is selected from polymers that show good adhesion to metals such as steel, e.g., epoxy resins.
  • a moderately thick layer of polyethylene provides a good exterior layer for the composite coating, providing mechanical and moisture protection. Unfortunately, polyethylene does not bond well to epoxy material. This necessitates the use of a tie-layer inte ⁇ osed between the epoxy layer and the polyethylene layer.
  • WO 9,422,598 discloses a three layer coating comprising an epoxy primer layer, applied as a powder, a hard thermoplastic adhesive layer and an outer polyethylene sheath.
  • U.S. Patent No. 4,213,486 discloses the application of fused, powdered epoxy as a first layer over heated steel.
  • a cover-sheet of polyethylene is coated with a pressure sensitive or hot-melt adhesive on the under surface in order to bond the polyethylene layer to the previously formed epoxy layer.
  • the final structure is a three layer protective coating where the intermediate layer is an adhesive.
  • Japanese Patent Nos. JP 57, 113,871 and JP 56,168,862 also teach three layer protective coatings for steel.
  • a bonding adhesive layer between polyethylene and epoxy layers comprises copolymers of ethylene with vinyl acetate, acrylic acid or maleic anhydride.
  • the method of forming composite coatings over metal employs, e.g., electrostatic spray application of a fusion bonded epoxy powder, and melt-extrusion of both the tie-layer and the layer of polyethylene.
  • alternative method of application as disclosed in U.S. Patent Nos. 5,178,902 and 5,300,336, relies on spray-application of all three layers.
  • the under layer is epoxy, and the exterior layer polyethylene.
  • the tie-layer comprises a fusion bonded epoxy powder mixed with either polyethylene powder or polyethylene plus a copolymer of polyethylene and maleic anhydride.
  • the current invention provides a commercially viable, economical two-layer composite corrosion-protective coating using modified epoxy compositions, which exhibit good adhesion between the layers, thus eliminating the tie layer.
  • Modified epoxy coating powders ofthe invention have surface characteristics to which polyolefins, such as polyethylene and polypropylene bond strongly.
  • the invention provides epoxy resin compositions to which polyolefin resins adhere well, and composite coating systems which provide a two layer composite coating system comprising a fused coating formed from such epoxy resin compositions, and coated thereover, a polyolefin resin.
  • the promoter may be dispersed in a dispersion, or may be dispersed in particulate form, e.g., by mixing.
  • Preferred powdered epoxy resin compositions ofthe invention comprise a thermoset epoxy resin and a dispersed adhesion promoter selected from the group consisting of oxidized polyethylene, maleated polyethylene, and maleated polypropylene.
  • Composite coatings systems ofthe invention comprise: a) a powdered epoxy composition comprising a thermoset epoxy resin and a dispersed adhesion promoter, and b) a polyolefin resin coated thereover.
  • Coated layers ofthe invention comprise a fused epoxy underlayer having been formed from a powdered epoxy composition and a dispersed adhesion promoter, overcoated by an exterior fused polyolefin layer, said epoxy layer having an adhesion to said metal of at least about 6.9 N/mm 2 adhesion to said polyolefin layer of at least about 3.5 N/mm.
  • composite coating system means a multilayer coating system comprising several layers of material coated atop each other over a metal substrate to form a moisture barrier that protects the metal from corrosion.
  • epoxy and "epoxy resin” mean a material containing at least one epoxide or glycidyl functionality.
  • maleated polyethylene and maleated polypropylene mean respectively a polyethylene or polypropylene resin having a maleic anhydride functional group.
  • oxidized polyethylene means polyethylene treated with ozone to create polar functional groups such as carboxylic groups.
  • soldersed adhesion promoter means 1) maleated or oxidized polyolefin phase dispersed in an epoxy disperson phase, or 2) maleated or oxidized polyolefin particles intermixed with an excess of epoxy powder.
  • Epoxy resin compositions useful for this invention are those which comprise certain dispersed adhesion promoters to enhance bonding between epoxy and polyolefin resins.
  • the improved bonding exhibited by these epoxy resins to polyolefin topcoats occurs because ofthe presence of these dispersed adhesion promoters in the molten epoxy layer.
  • the epoxy composition forms protective surface coatings when applied to metal substrates and heated in the range of 180-250°C.
  • a remarkably small amount of dispersed adhesion promoter, e.g. 0.5% to 5.0% is effective in increasing interlayer bond strength.
  • Adhesion promoters such as oxidized or maleated polyolefins enhance bonding between epoxy and polyolefin layers.
  • the resulting composite coating resists strongly any attempt to separate the layers. This is in sharp contrast to a similar combination of layers with the dispersed adhesion promoter omitted.
  • Composite coatings easily peel apart in the absence ofthe promoter.
  • Adhesion promoters associate with the epoxy resin powder in several ways. When included during compounding ofthe epoxy resin powder, the adhesion promoter may be found inside a dispersed resin powder particle or at its surface. However, by compounding the epoxy resin first, then mixing-in the promoter, it is likely that each epoxy powder particle acquires a surface coating of adhesion promoter particles.
  • Compounded epoxy resins comprise a material containing an epoxide or glycidyl functionality, a catalyst, a cure accelerator, fillers and various additives.
  • Materials with suitable epoxide or glycidyl group functionality include aliphatic epoxides such as aliphatic diepoxides and triepoxides, polyglycidyl ethers of aliphatic polymers, i.e., polyoxyalkylene extended polyols, such as Heloxy® 84, available from Shell or DER 732, available from Dow Chemical; bisphenol A, and substituted bisphenol A derivatives such as bisphenol A endcapped diglycidyl ether of bisphenol A, dihydric bisphenols, and blends thereof, and the like.
  • Aromatic epoxides useful in compositions include diglycidyl ethers of bisphenol
  • A diglycidyl ethers of bisphenol F and mixtures thereof, epoxy novolak, phenolic novolak and the like.
  • Useful resins include monohydroxy and polyhydroxy compounds, and may be aliphatic or contain one or more aromatic rings, such as those disclosed in U.S. Patent 4,560,732, and EPO 0342 035, both of which are inco ⁇ orated by reference.
  • Useful epoxy resins for powder coating are solid resins formed from these epoxy materials, either singly or blends thereof.
  • an epoxy resin has a softening point between about 50°C and about 130°C; preferred epoxy resins have an epoxy equivalent weight between about 550 and about 2000.
  • Useful catalysts include, e.g., amine type curing agents such as dicyandiamide, methylene dianiline and dihydrazides, as well as anhydride type curing agents such as benzophenone tetracarboxylic dianhydride (BTDA), carboxyl terminated polyesters, and novolak resins and the like.
  • the curing agents can be present in the coating composition in amounts which depend on the curing stoichiometry. Generally, the amount of curing agent in the composition will range between about 1 and 20% by weight.
  • Useful curing accelerators include metal salts such as stannous octoate, tertiary amines such as imidazoles and imidazole adducts with glycidyl ethers of bisphenol A.
  • metal salts such as stannous octoate, tertiary amines such as imidazoles and imidazole adducts with glycidyl ethers of bisphenol A.
  • Commercially available products include e.g., Epon® P-101, available from Shell Chemical Company, and HULS #31.
  • known accelerators for the production of epoxy resins may be inco ⁇ orated during compounding.
  • Further adjuvants for the compounded epoxy resin include fillers and function-specific additives.
  • Useful fillers include calcium metasilicate, ground silica, various micas, calcium carbonate, magnesium oxide, barium sulfate and the like.
  • the fillers can be present in amounts up to about 60% by weight.
  • Function-specific additives include flow-modifiers such as polyacrylates and fluorocarbons, such as FC430 from 3M Company, and Modaflow III available from Monsanto Co ⁇ .
  • the flow control agents can be present in the coating composition in amounts up to about 2% by weight.
  • Epoxy compositions ofthe invention may also contain minor amounts of conventional adjuvants such as dyes, colorants, pigments, leveling agents and the like, so long as the surface characteristics are not detrimentally affected by the type or amount ofthe promoter.
  • Pigments are frequently included both for identification, e.g., coating pipes used to carry various materials with different colors, and for aesthetic reasons.
  • Useful pigments include e.g., titanium dioxide and various iron oxide pigments. When present, pigments can comprise up to about 60% by weight ofthe composition.
  • the epoxy composition may be prepared by conventional means such as melt- mixing using a heated two-roll mill or extruder. Such mixing, the composition is cooled, then pulverized by known means to a required range of particle size. The powdered epoxy resin is then treated with the dispersed adhesion promoters ofthe invention.
  • an extruder or two roll mill provides compositions by combining the epoxy resin with dicyandiamine, a phenolic resin, a catalyst, pigments and fillers. Maleated polypropylene is added at the feed end ofthe extruder, thereafter extruding the compounded resins.
  • a remarkably small amount of adhesion promoter e.g. 0.5% to 5.0% is effective in increasing interlayer bond strength.
  • the adhesion ofthe applied fused epoxy layer to the exterior polyolefin layer is strong enough such that the polyolefin layer may fail internally rather than at the interface.
  • the level of dispersed adhesion promoter is not sufficient to build strong adhesion; at levels much higher than 7-10%, the adhesion level ofthe fused epoxy layer to the steel begins to be adversely effected.
  • the epoxy composition may be applied to the metal substrate by spraying the powder composition onto a metal substrate heated to a temperature of between 180-
  • the heated substrate may be dipped into a powder bed to form the coating.
  • the coated substrate is then coated immediately with the polyolefin layer while the epoxy layer is still molten.
  • the top layer ofthe two layer composite coating system is a moisture impervious polymer such as a polyolefin, preferably polyethylene or polypropylene.
  • This layer may be sprayed as a powder, extruded, or applied by other conventional means.
  • This layer may also contain a variety of adjuvants, fillers, colorants, flow agents, and the like, as known in the art.
  • Coating of test plates with FBE and PE layers required an elevated temperature of about 228°C, obtained by placing a taped Q-plate on a hot ⁇ plate with the Teflon® tape facing outward from the hot-plate surface. Attainment of a suitable coating temperature at the surface ofthe taped Q-plate required at least 10 minutes in contact with the hot-plate.
  • Use of a notched draw-down tool, required by the CSA Z245.23-M92. test method produced a thin spread of molten FBE, lengthwise along the plate so that it covered taped and untaped portions ofthe Q-plate.
  • PE powder applied before the epoxy layer cured, simulated spraying of a powdered PE topcoat.
  • an epoxy layer to a steel bar required pre-heating the bar to 205 °C (400°F) followed by its immediate immersion in a fiuidized bed of maleated polypropylene-containing epoxy powder.
  • the polypropylene sheet was large enough to allow preparation of a 1.0 inch- wide longitudinal strip cut from the tab end ofthe polypropylene sheet and extending 2.0 inches into a section where it bonded to the epoxy layer. The cuts, required in forming the strip, extended through the polypropylene layer and into the epoxy layer.
  • the bar is of rectangular cross section with the polypropylene film bonded to one of its two major faces. Before measuring adhesion, the end ofthe bar farthest from the 1.0 inch tab was secured in a clamp, the length ofthe bar being positioned horizontally and the polypropylene film disposed on the underside ofthe bar.
  • the uniform powder melts to form a continuous film when applied to the surface of a metal test plate heated at 230-235°C.
  • a polyethylene topcoat, applied before the epoxy layer is gelled provides the water impervious, protective outer layer.
  • the topcoat in this example was HPCC powder available from Shaw Industries Ltd. of Toronto, Canada. After cooling, a qualitative test ofthe bond between polyethylene and epoxy, requires a utility knife to probe between layers for evidence of separation associated with bond failure. Test results are shown in Table 1.
  • Example 2 Cabosil® M5, available from Cabot Co ⁇ oration was mixed into the pulverized epoxy powder at a level of 0.2% in this and all further examples, as a flow agent.
  • Example 1 Example 2 Example C3 Example C4
  • Examples 16-24 Effect of Varying Epoxy in the Composition The data below show the effect of varying the epoxy resin in the epoxy composition. Again, every sample is subjected to 180° peel stress until a failure is achieved. For each epoxy resin, dramatic improvement in adhesion is shown when the adhesion promoter is added. In some cases, the adhesion becomes so strong that the polyethylene layer fails internally, in others the final failure is between the two layers or between the steel and the epoxy layer. In all cases, adhesion is below 1 N/mm without adhesion promoter and above 6 N/mm with addition ofthe adhesion promoter.
  • Examples 25-29 Effect of Compounding Adhesion Promoters with FBE Formulations
  • Examples 25-29 resulted from combining adhesion promoters with the epoxy composition in a single step using a two roll mill compounder having one roll cooled by water to between 4°C and 20°C while the other roll is heated to between 60°C and 90°C.
  • This method allows adhesion promoters having larger particle size to be inco ⁇ orated into the epoxy coating composition.
  • this method only a small amount of adhesion promoter remains on the surface; the majority is distributed throughout the epoxy powder. As a result, most compositions made by this method do not show increased adhesion.
  • Example 26 uses a large particle adhesion promoter; the mean particle size is greater than 100 microns; the compounder has less of an effect on such large particles and more remains on the surface to improve the adhesion.
  • ALPLAC Aldrich poly(ethylene-co-acrylic acid)
  • ALPJMA Aldrich poly(ethylene-co maleic anhydride)
  • examples 30-32 either address performance of polyethylene films adhered to epoxy layers on Q-plates or either polyethylene film or polyethylene powder adhered to epoxy coated steel bar.
  • the epoxy composition comprised 98.0% Scotchkote®-6208 3M epoxy and 2.0% Aqua-Poly 250.
  • Preparation of samples 30 and 31 involved application of polyethylene film, heated to 230°C, to epoxy coated substrates while the epoxy material existed in a heated, molten condition.
  • Steel bar, used for sample 32 received a coating of epoxy by placing the bar heated to 180- 250°C in a fiuidized bed of epoxy composition. Thereafter a similar procedure, using a polyethylene powder fiuidized bed, added a molten layer of polyethylene to the surface ofthe underlying epoxy. Sample testing occurred after the samples cooled.
  • Samples prepared like example 31, but without Aqua-Poly 250 showed failure at the interface between polyethylene film and epoxy surface at less than 1.0 N/mm applied force.
  • Examples 33-36 Water Immersion and Cathodic Disbondment Testing
  • Examples 33-36 provided information ofthe ability of coatings of epoxy compositions ofthe invention to survive immersion in water at 75°C and cathodic disbondment at 65°C as prescribed by standard test CSA-Z245.20-M92. Testing required sample preparation by heating steel bars to 232°C then dipping them into a fiuidized bed of epoxy composition according to Table 6. Epoxy coating thickness was between 12 and 15 mils (300 ⁇ m - 375 ⁇ m), each coating being cured for 3 minutes, at 232°C after dipping. Immersion in cold water quenched the samples after curing.
  • Example 37 A mixture of 98.8% epoxy resin Scotchkote-6208 and 1.2% Aqua Poly 250, prepared as shown in Example 1, provided the first layer, 250 ⁇ m thick (10 mils), of a metal protective composite coating. This layer formed on the bar during dipping of a grit-blasted steel bar, pre-heated to 232°C, in a fiuidized bed ofthe epoxy mixture. Immediately thereafter the heated, epoxy coated, bar received a coating of polyethylene, 250 ⁇ m - 380 ⁇ m (10 to 15 mils) thick, by immersion in a fiuidized bed of polyethylene powder (HPPC from Shaw). A post-cure process for the epoxy mixture required 3 minutes at 232°C. Thereafter the coated bar was quenched by immersion in cold water.
  • Examples 38-51 were formed using an extruder or two roll mill to mix epoxy compositions ofthe invention, combining epoxy resin with dicyandiamide, a phenolic resin, a catalyst, pigments, fillers and maleated polypropylene. The resulting material was ground to a powder having a particle size of about 44 ⁇ m.
  • compositions containing adhesion promoters according to the invention had good adhesion to the polyolefin substrates whereas the comparative examples did not adhere well to the polyolefin.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne des compositions de résine époxy comprenant des promoteurs d'adhésion dispersés destinés à augmenter l'adhésion à des résines polyoléfiniques, et des systèmes de revêtement composites multicouches utiles dans la prévention de la corrosion sur des substrats en métal, lesquels comprennent une sous-couche formée à partir desdites compositions de résine époxy, sur laquelle est appliquée une résine polyoléfinique fusionnée.
PCT/US1996/015248 1995-10-10 1996-09-24 Systeme de revetement anticorrosion WO1997013589A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US54163595A 1995-10-10 1995-10-10
US08/541,635 1995-10-10
US70502996A 1996-08-29 1996-08-29
US08/705,029 1996-08-29

Publications (2)

Publication Number Publication Date
WO1997013589A1 true WO1997013589A1 (fr) 1997-04-17
WO1997013589B1 WO1997013589B1 (fr) 1997-05-09

Family

ID=27066758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/015248 WO1997013589A1 (fr) 1995-10-10 1996-09-24 Systeme de revetement anticorrosion

Country Status (1)

Country Link
WO (1) WO1997013589A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766202A1 (fr) * 1997-07-18 1999-01-22 Bitumes Speciaux Sa Revetement et procede de revetement anticorrosion a base de peintures epoxydiques
WO2002023556A1 (fr) * 2000-09-14 2002-03-21 3M Innovative Properties Company Compositions de film pour la liaison avec des metaux
WO2009028580A1 (fr) * 2007-08-24 2009-03-05 Oncotherapy Science, Inc. Ebi3, dlx5, nptx1 et cdkn3 pour des gènes cibles de thérapie et de diagnostic de cancer de poumon
EP2906361A1 (fr) * 2012-10-10 2015-08-19 ShawCor Ltd. Compositions de revêtement et procédés de fabrication de celles-ci
US11820915B2 (en) 2018-12-14 2023-11-21 Swimc Llc Fusion bonded epoxy rebar powder coatings

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034841A1 (fr) * 1980-01-16 1981-09-02 The Continental Group Incorporated Compositions de vernis à stabilité thermique améliorée et procédé pour faire adhérer un polymère de propylène à une surface métallique par utilisation de ce vernis
US4312902A (en) * 1979-03-07 1982-01-26 Kansai Paint Co., Ltd. Coating composition capable of forming a multilayer film
US4345004A (en) * 1980-04-30 1982-08-17 Hercules Incorporated Process for forming a coated film of an olefinic resin
US4481239A (en) * 1982-08-07 1984-11-06 Hoechst Aktiengesellschaft Process for coating metallic substrates, and use of the products prepared in this process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4312902A (en) * 1979-03-07 1982-01-26 Kansai Paint Co., Ltd. Coating composition capable of forming a multilayer film
EP0034841A1 (fr) * 1980-01-16 1981-09-02 The Continental Group Incorporated Compositions de vernis à stabilité thermique améliorée et procédé pour faire adhérer un polymère de propylène à une surface métallique par utilisation de ce vernis
US4345004A (en) * 1980-04-30 1982-08-17 Hercules Incorporated Process for forming a coated film of an olefinic resin
US4481239A (en) * 1982-08-07 1984-11-06 Hoechst Aktiengesellschaft Process for coating metallic substrates, and use of the products prepared in this process

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766202A1 (fr) * 1997-07-18 1999-01-22 Bitumes Speciaux Sa Revetement et procede de revetement anticorrosion a base de peintures epoxydiques
WO1999003598A1 (fr) * 1997-07-18 1999-01-28 GAILLARD, Gérard Revetement et procede de revetement anticorrosion a base de peintures epoxydiques
WO2002023556A1 (fr) * 2000-09-14 2002-03-21 3M Innovative Properties Company Compositions de film pour la liaison avec des metaux
US6387508B1 (en) 2000-09-14 2002-05-14 3M Innovative Properties Company Metal bonding film compositions
WO2009028580A1 (fr) * 2007-08-24 2009-03-05 Oncotherapy Science, Inc. Ebi3, dlx5, nptx1 et cdkn3 pour des gènes cibles de thérapie et de diagnostic de cancer de poumon
EP2906361A1 (fr) * 2012-10-10 2015-08-19 ShawCor Ltd. Compositions de revêtement et procédés de fabrication de celles-ci
EP2906361A4 (fr) * 2012-10-10 2016-09-14 Shawcor Ltd Compositions de revêtement et procédés de fabrication de celles-ci
US11820915B2 (en) 2018-12-14 2023-11-21 Swimc Llc Fusion bonded epoxy rebar powder coatings

Similar Documents

Publication Publication Date Title
RU2146272C1 (ru) Застывающий полимерный состав, способ нанесения защитного покрытия на подложку и защитное покрытие подложки
WO2009143602A1 (fr) Compositions de revêtement et leurs procédés de fabrication
JP3380247B2 (ja) 三層金属管被覆剤及び三層法で金属管を外部被覆する方法
US4048355A (en) Process for the formation of a polyolefin coating layer onto a metal surface
CA1166789A (fr) Colle epoxydique en liquide pregelifiable a projeter ou en pate
EP1926786B1 (fr) Articles revêtus comprenant des substrates métaliques
WO2007146388A1 (fr) Composition de revêtement sous forme de poudre pour le revêtement de tuyauteries
WO1997013589A1 (fr) Systeme de revetement anticorrosion
WO1990003850A1 (fr) Procede servant au revetement in situ de conduites
JPS61133174A (ja) 基材の保護
JP2002530226A (ja) 金属基材への熱可塑性エラストマーの接着を促進するための組成物および方法
KR100509624B1 (ko) 유리전이온도가 높은 하도용 열경화성 에폭시 분체도료조성물
JPH0885780A (ja) 耐熱接着剤及びそれを用いた熱収縮物品
US5939196A (en) Coating for metal surfaces and method for implementing it
MXPA97001672A (en) New coating for metal surfaces and procedure to perform
JPS5949268B2 (ja) エポキシ樹脂系接着剤
JPS6152873B2 (fr)
JPH11115097A (ja) 多層の金属被覆物およびこれを用いた金属被覆方法
JPH0381145A (ja) 積層体
JPH01127085A (ja) 鋼管の防食被覆方法
JPS6321545B2 (fr)
JPS58168628A (ja) ポリエチレン組成物被覆金属体の製造方法
JPH11511491A (ja) 粉末コーティングでコートされた容器封止
EP0806993A1 (fr) Revetement sous forme de peinture pulverulente pour surfaces interieures et exterieures de tuyaux metalliques
CA2013868A1 (fr) Resine thermodurcissable et revetement en foudre incorportant cette resine

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA