GB2065155A - Coated or laminated metal sheet for use as a building material - Google Patents

Coated or laminated metal sheet for use as a building material Download PDF

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Publication number
GB2065155A
GB2065155A GB7943329A GB7943329A GB2065155A GB 2065155 A GB2065155 A GB 2065155A GB 7943329 A GB7943329 A GB 7943329A GB 7943329 A GB7943329 A GB 7943329A GB 2065155 A GB2065155 A GB 2065155A
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United Kingdom
Prior art keywords
metal sheet
coated
sheet
coating
polyvinylchloride
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
Application number
GB7943329A
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GB2065155B (en
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Toyo Kohan Co Ltd
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Toyo Kohan Co Ltd
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Filing date
Publication date
Application filed by Toyo Kohan Co Ltd filed Critical Toyo Kohan Co Ltd
Priority to GB7943329A priority Critical patent/GB2065155B/en
Priority to DE19792950994 priority patent/DE2950994A1/en
Priority to FR7931463A priority patent/FR2471859A1/en
Publication of GB2065155A publication Critical patent/GB2065155A/en
Application granted granted Critical
Publication of GB2065155B publication Critical patent/GB2065155B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
    • 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
    • B05D7/16—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 synthetic lacquers or varnishes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • 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
    • C09D127/04—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 chlorine atoms
    • C09D127/06—Homopolymers or copolymers of vinyl chloride
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C09D5/10—Anti-corrosive paints containing metal dust
    • C09D5/103—Anti-corrosive paints containing metal dust containing Al
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/08—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of metal, e.g. sheet metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
    • E04D3/30—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • 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
    • B05D2506/00—Halogenated polymers
    • B05D2506/20—Chlorinated polymers
    • B05D2506/25—PVC
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/105—Metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/30—Iron, e.g. steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof

Abstract

The sheet material having excellent weatherability, corrosion resistance and formability is produced by providing a metal (e.g. steel) sheet with a coated or laminated layer comprising polyvinylchloride resin and micaceous (i.e. in flaky, scaly etc. form) aluminium powder. Powdered zinc, tin or lead or an alloy of any of these metals, and plasticizer and stabilizer can also be included in the layer. The treated metal sheet may be overlaid with an acrylic-type resin film.

Description

SPECIFICATION A composite coated metal sheet The present invention relates to a composite coated metal sheet which is suitable for outdoor building materials.
Conventional coated metal sheets for outdoor building materials are as follows: 1. Precoated Galvanized Sheets This product is a galvanized sheet coated with paint which is of the thermosetting acrylic-type, polyester type, silicon-type or fluorocarbon-type resin. The coating is 10 to 40 ztm in thickness.
2. Polyvinylchloride-Metal Laminated Sheets This product is a galvanized sheet covered with semi-rigid or flexible polyvinylchloride resin film of 100 to 300 S*m thickness.
3. Polyacrylate-Metal Laminated Sheets This product is galvanized sheet covered with acrylic-type resin film of 50 to 100 Mm thickness.
4. Polyacrylate-Polyvinylchloride-Metal Laminated Sheets This product is a polyvinylchloride-metal laminated sheet which is overlaid with acrylic-type resin film of 50 to 100 ,gtm thickness.
However, the above-mentioned coated metal sheets are not always adequate from the standpoint of economy and durability for outdoor building materials.
On the other hand, zinc rich paint or aluminium rich paint consisting of zinc powder or aluminium powder and organic polymer e.g. epoxy resin is used for protection of metal building materials. But such paint films are subject to cracking in industrial processes such as bending or roll forming because of low flexibility. Therefore these paints can not be used for precoated material.
We have now found that metal sheets coated with a composition containing polyvinylchloride resin and a metal powder, and usually a plasticizer and stabilizer, have excellent weatherability, corrosion resistance and formability when used as building materials. The sheets can be overlaid with an acrylic-type resin film to provide superior weatherability, corrosion resistance and formability properties. Moreover, the sheets are economical.
The invention thus provides a coated metal sheet comprising a metal sheet substrate coated with a composition which comprises a polyvinylchloride homopolymer or copolymer resin and 5 to 70 parts by weight of micaceous aluminium powder per 100 parts by weight of the polyvinylchloride resin.
This composite coated metal sheet may be produced by the following method. The metal sheet is precoated with adhesive, baked by heat treatment, coated with a composite material, in paste form, containing polyvinylchloride resin, metal powder, plasticizer and stabilizer or by laminating the composite material as a film, and then baking, i.e. heat treatment. This product has excellent weatherability, corrosion resistance and formability.
Furthermore, in certain cases, this composite coated sheet may be overlaid with an acrylic-type resin film. This product has superior weatherability and corrosion resistance.
The present invention will be described below in more detail, beginning with the composite coating.
The composite coating composition comprises polyvinylchloride resin and micaceous aluminium powder, and may contain additives such as plasticizers and stabilizers, and in certain cases a metal powder such as zinc, tin and lead and alloys of these metals. The coating composition may include agents such as pigment and filler etc. for the polyvinylchloride resin. Polyvinylchloride resin, which is one of the main components of the present invention, may be material prepared by suspension polymerization, emulsion polymerization and solution polymerization, and may be a homopolymer or copolymer.
The micaceous aluminium powder, which is a lustrous material made for example of or from thin aluminium flakes or scales, is produced by ordinary industrial methods. Sizes of more than 10 ,um are undesirable because they impair the appearance of the coated surface. The particle diameter of aluminium powder thus is not critical but a small size is preferred. Powders other than aluminium may be included for the purpose of further improving corrosion resistance, e.g. metal powders such as zinc, tin, lead and alloys of these metals. In these powders, a diameter of more than 70 ,Itm is undesirable because it impairs the appearance of the coating surface.
Plasticizers and stabilizers which may be used include those conventionally used for polyvinylchloride resins.
The formula for the composite materials is generally as follows: polyvinylchloride: 100 parts micaceous aluminium powder: 5-70 metal powder other than aluminium powder 0--145 plasticizer: as needed stabilizer: as needed However, the total amount of micaceous aluminium powder and powder other than aluminium powder must not be over 1 50 parts.
An amount of micaceous aluminium powder of less than 5 parts is undesirable because it causes the coating composition to be infereior in weatherability and corrosion resistance. An amount of more than 70 parts is undesirable because coating composition is inferior in formability. Moreover, the total amount of metal powder of more than 1 50 parts is undesirable because the resultant composite material coating is inferior in formability. The amount of plasticizer and stabilizer is added tc impart good formability and durability.
Next, the composition and function of the acrylic-type resin film, which is a preferred embodiment, will be discussed.
The acrylic-type resin film may be comprised of one of the following composition Nos. 1 to 4, employing one or more of the following components A, B and C.
Component A = C1-C4 alkyl methacrylate.
Component B = C1-C8 alkyl acrylate.
Component C = ethylene-type monomer which is capable of being copolymerized with A and B.
Composition No. 1 mainly consists of the polymer of A.
Composition No. 2 mainly consists of a blend of polymers A and B.
Composition No. 3 mainly consists of the copolymer of A and B.
Composition No. 4 mainly consists of the copolymer of A, B and C.
Composition Nos. 1 to 4 may contain additives such as ultraviolet absorbers, pigment etc. The acrylic-type resin film is 20 to 200 ym in thickness.
Next the process for obtaining the coated metal sheets of the present invention will be described.
Hot dip galvanizing steel sheet, electrogalvanized steel sheet or electrolytic chromate treatment steel sheet etc. are used as the substrate steel sheet. Well-known adhesive for polyvinylchloride-metal laminated steel, which is of acrylic-type, epoxy-type, urethane-type or rubber-type etc., is used as adhesive. The substrate steel sheet is precoated with adhesive, baked by heat treatment, and covered with the composite materials by coating or laminating. In case of coating, the coating composition is used as a paste of suitable viscosity. The substrate steel sheet with adhesive is coated with this composition by roll coating, dipping, knife-coating, or curtain coating etc., and then baked by heat treatment at 1 500C to 2500C for gelation and adhesion.
In case of laminating, the composite material is first formed as film or sheet by calendering, extrusion etc. Then, the substrate steel sheet with adhesive is heated, laminated with this film by a roll press or the like and then the resultant product is heated at 1 500C to 2500C to insure adhesion.
The coated metal sheet of the present invention is produced by the process described above.
The coated metal sheet may be overlaid with an acrylic-type resin film, which is preferred embodiment of the present invention, as follows. After the substrate steel sheet is covered with the composite materials as described above, it is overlaid with acrylic-type resin film by a roll press etc. at 1000C to 2500C, and then in certain cases, is heated at 1000C to 2500C for the purpose of improving adhesion.
The following examples illustrate the invention.
EXAMPLE 1 The electrolytic chromate treatment steel sheet of 0.5 mm thickness (Trademark: Hi-Top) was coated with an epoxy-type adhesive in 5 fim thickness by a bar coater and heated in a hot-air oven for 30 seconds at 3000 C. The temperature of the steel sheet was 2300 C. Then the steel sheet was cooled, coated with the composite materials at 200 ym thickness by a knife coater and baked by hot-air oven for 60 seconds at 2600C. The temperature of the steel sheet was 2000 C. Then the steel sheet was cooled.
The composition of the composite material was as follows with reference to parts being by weight.
polyvinylchloride resin (Trademark: Geon 121L): 100 parts micaceous aluminium powder (0.5 Mm thickness): 20 parts plasticizer (n-D.O.P): 50 parts stabilizer (Cd-Ba type): 3 parts diluent (mineral spirits): 10 parts The Dupont impact test (1/2" x 1 Kg x 50 cm) was applied to this coated steel sheet. This coated steel sheet showed no evidence of adhesion loss and cracking of the coated layer. Also, this coated steel sheet was subjected to an outdoor exposure test and the steel sheet did not show adhesion loss and degradation such as discoloration and cracking of the coated layer, even after 8 years.
On the other hand, a reference sample, which was coated with a composition wherein titanium white was used in place of micaceous aluminium powder, was spoiled noticably after 5 years in the outdoor exposure test and showed slight adhesion loss and discoloration of the coated layer after 3 years.
Next, an aluminium rich paint consisting of aluminium powder and an epoxy-type resin as binder was coated on an electrolytic chromate treatment steel sheet in about 200 ttm thickness. This coated steel sheet was subjected to outdoor exposure tests as a reference sample. This sample showed slightly spotty rust after about 2 years and showed red rust over the whole surface after 5 years. Also this sample was subjected to the Dupont impact test (1/2" x 1 Kg x 50 cm), but showed cracking and adhesion loss of the coated layer.
EXAMPLE 2 To the coating composition of Example 1, 50 parts by weight of lead powder of 10 ,um particle diameter was added. The coated steel sheet obtained was essentially the same as that of Example 1.
This coated steel sheet showed no adhesion loss and cracking of the coated layer after Dupont impact test (1/2" x 1 Kg x 50 cm). Further, this coated steel sheet showed no adhesion loss and degradation such as discoloration and cracking in the coated layer after an outdoor exposure test for 10 years.
EXAMPLE 3 A composite coated steel sheet was produced as in Example 1. When the temperature of this sample was about 1 800 C, this sample was overlaid with a blue acrylic-type resin film of 30 ,um thickness by press rolling, and heated by hot air oven for 60 seconds at 2600 C. The temperature of this sample was about 2000 C. Then this sample was cooled. This sample was subjected to the Dupont impact test (1/2" x 1 Kg x 50 cm). This sample showed no evidence of adhesion loss and cracking of the coated layer. Also, after this sample was cross-hatched on the coated layer by a razor and was found to have a coating depth of 8 mm by the Erichsen test, the sample was subjected to the accelerated weathering test (Sunshine Weather Meter Test) JIS A 1415.
Consequently, these samples showed no evidence of cracking, discoloration, blister and adhesion loss of coated layer after 8000 hrs. Then, the cross-hatched sample was subjected to the salt spray test by JIS Z 2371 for 300 hrs. The length of delamination of the coated layer was under 1 mm.
On the other hand, a reference sample using titanium white as in Example 1 was overlaid with a blue acrylic-type resin film of 30 ,um thickness.
This reference sample was subjected to the same tests. In Sunshine Weather Meter test, this reference sample showed slight unevenness of the surface and blistering of 3 to 10 mm length after 8000 hrs. In the salt spray test, this reference sample showed delamination of 7 to 1 7 mm length and red rust.

Claims (11)

1. A coated metal sheet comprising a metal sheet substrate coated with a composition which comprises a polyvinylchloride homopolymer or copolymer resin and 5 to 70 parts by weight of micaceous aluminium powder per 100 parts by weight of the polyvinylchloride resin.
2. A coated metal sheet as claimed in claim 1 wherein said coating further comprises at least one other metal powder selected from the group consisting of zinc, tin and lead and alloys of said metals, the total amount of micaceous aluminium powder and said other metal powder being not more than 1 50 parts by weight per 100 parts by weight of the polyvinylchloride resign.
3. A coated metal sheet as claimed in claim 1 or claim 2 which further comprises a top layer of an acrylic-type resin film 20 to 200 Mm thick.
4. A coated metal sheet as claimed in any one of the preceding claims wherein said coating composition further comprises a plasticizer and/or a stabilizer for the polyvinylchloride resin.
5. A coated metal sheet as claimed in any one of the preceding claims wherein the metal sheet is a steel sheet.
6. A coated metal sheet as claimed in any one of the preceding claims wherein the polyvinylchloride resin-containing composition is adhesively secured to the metal sheet.
7. A coated metal sheet as claimed in claim 1 and substantially as described herein in any one of the examples.
8. A method of producing a coated metal sheet as claimed in claim 1 wherein said coating is applied by forming a paste of said composition, applying said paste to said metal sheet and baking said paste on said metal sheet to form a solid coating thereon.
9. A method of producing a coated metal sheet as claimed in claim 1 wherein said coating is applied by laminating a film or sheet comprising said polyvinylchloride resin and micaceous aluminium powder to said metal sheet.
10. A method as claimed in claim 8 or claim 9 wherein an adhesive is applied to said metal sheet before said coating is applied.
11. A method of producing a coated metal sheet as claimed in claim 1, substantially as described herein in any one of the examples.
GB7943329A 1979-12-17 1979-12-17 Coated or laminated metal sheet for use as a building material Expired GB2065155B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB7943329A GB2065155B (en) 1979-12-17 1979-12-17 Coated or laminated metal sheet for use as a building material
DE19792950994 DE2950994A1 (en) 1979-12-17 1979-12-18 COATED SHEETS
FR7931463A FR2471859A1 (en) 1979-12-17 1979-12-21 METALLIC SHEET WITH RESIN COMPOSITE COATING AND METALLIC POWDER

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB7943329A GB2065155B (en) 1979-12-17 1979-12-17 Coated or laminated metal sheet for use as a building material
DE19792950994 DE2950994A1 (en) 1979-12-17 1979-12-18 COATED SHEETS
FR7931463A FR2471859A1 (en) 1979-12-17 1979-12-21 METALLIC SHEET WITH RESIN COMPOSITE COATING AND METALLIC POWDER

Publications (2)

Publication Number Publication Date
GB2065155A true GB2065155A (en) 1981-06-24
GB2065155B GB2065155B (en) 1984-02-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB7943329A Expired GB2065155B (en) 1979-12-17 1979-12-17 Coated or laminated metal sheet for use as a building material

Country Status (3)

Country Link
DE (1) DE2950994A1 (en)
FR (1) FR2471859A1 (en)
GB (1) GB2065155B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999006646A1 (en) * 1997-07-29 1999-02-11 Martinez Celso Jr A roof waterproofing system consisting of an organic resin protected by an aluminum-copolymer composite foil
FR2832610A1 (en) * 2001-11-23 2003-05-30 Balsa Letter-box comprises pre lacquered sheet metal
EP1331319A1 (en) * 2002-01-29 2003-07-30 Paroc Group Oy Ab Method for making a sandwich element
WO2008043431A1 (en) * 2006-10-09 2008-04-17 G. Tröster E. K. Conductive connection device comprising a contact corrosion protection means

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DE102009006941B4 (en) * 2009-01-30 2013-01-10 Otto Bock Healthcare Gmbh Use of finely divided metal particles in a material, a skin patch and an orthopedic article

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FR2832610A1 (en) * 2001-11-23 2003-05-30 Balsa Letter-box comprises pre lacquered sheet metal
EP1331319A1 (en) * 2002-01-29 2003-07-30 Paroc Group Oy Ab Method for making a sandwich element
WO2008043431A1 (en) * 2006-10-09 2008-04-17 G. Tröster E. K. Conductive connection device comprising a contact corrosion protection means

Also Published As

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FR2471859B1 (en) 1982-12-17
FR2471859A1 (en) 1981-06-26
GB2065155B (en) 1984-02-29
DE2950994A1 (en) 1981-06-25

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