JPH04215873A - Production of precoated steel plate - Google Patents
Production of precoated steel plateInfo
- Publication number
- JPH04215873A JPH04215873A JP848091A JP848091A JPH04215873A JP H04215873 A JPH04215873 A JP H04215873A JP 848091 A JP848091 A JP 848091A JP 848091 A JP848091 A JP 848091A JP H04215873 A JPH04215873 A JP H04215873A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- film
- paint
- top coat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002245 particle Substances 0.000 claims abstract description 54
- 239000003973 paint Substances 0.000 claims abstract description 46
- 239000000049 pigment Substances 0.000 claims abstract description 36
- 239000011230 binding agent Substances 0.000 claims abstract description 25
- 229920006163 vinyl copolymer Polymers 0.000 claims abstract description 15
- 239000007769 metal material Substances 0.000 claims abstract description 9
- 238000004040 coloring Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000010408 film Substances 0.000 description 55
- 238000000576 coating method Methods 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 229920000728 polyester Polymers 0.000 description 12
- 229920000642 polymer Polymers 0.000 description 10
- 229920000178 Acrylic resin Polymers 0.000 description 9
- 239000004925 Acrylic resin Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 229920003180 amino resin Polymers 0.000 description 8
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 8
- 229920006385 Geon Polymers 0.000 description 7
- 229920000877 Melamine resin Polymers 0.000 description 7
- 239000004640 Melamine resin Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 239000008397 galvanized steel Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 229920003270 Cymel® Polymers 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 239000001023 inorganic pigment Substances 0.000 description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 4
- 239000012860 organic pigment Substances 0.000 description 4
- 229920001225 polyester resin Polymers 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 239000004645 polyester resin Substances 0.000 description 3
- 239000012798 spherical particle Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 229920006387 Vinylite Polymers 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000007974 melamines Chemical class 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 2
- 238000007592 spray painting technique Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- NVKTUNLPFJHLCG-UHFFFAOYSA-N strontium chromate Chemical compound [Sr+2].[O-][Cr]([O-])(=O)=O NVKTUNLPFJHLCG-UHFFFAOYSA-N 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 2
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 description 1
- 206010016322 Feeling abnormal Diseases 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- AUNAPVYQLLNFOI-UHFFFAOYSA-L [Pb++].[Pb++].[Pb++].[O-]S([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Mo]([O-])(=O)=O Chemical compound [Pb++].[Pb++].[Pb++].[O-]S([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Mo]([O-])(=O)=O AUNAPVYQLLNFOI-UHFFFAOYSA-L 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 description 1
- XBJJRSFLZVLCSE-UHFFFAOYSA-N barium(2+);diborate Chemical compound [Ba+2].[Ba+2].[Ba+2].[O-]B([O-])[O-].[O-]B([O-])[O-] XBJJRSFLZVLCSE-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BIOOACNPATUQFW-UHFFFAOYSA-N calcium;dioxido(dioxo)molybdenum Chemical compound [Ca+2].[O-][Mo]([O-])(=O)=O BIOOACNPATUQFW-UHFFFAOYSA-N 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 229920001688 coating polymer Polymers 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 1
- -1 fluororesin Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- VRWKTAYJTKRVCU-UHFFFAOYSA-N iron(6+);hexacyanide Chemical compound [Fe+6].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] VRWKTAYJTKRVCU-UHFFFAOYSA-N 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、低光沢でソフトなビロ
ード調の手触り感を有するプレコート鋼板、さらにメタ
ル等を加えることにより低光沢でソフト感及びメタリッ
ク感を有するプレコート鋼板の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precoated steel sheet that has low gloss and a soft, velvety feel to the touch, and a method for producing a precoated steel sheet that has low gloss and a soft and metallic feel by adding metal or the like.
【０００２】0002
【従来の技術】従来、艶消しでかつビロード調の外観を
呈する塗装鋼板は、４０〜６０μｍの着色粒子とバイン
ダーとを含む被覆組成物を鋼板に塗装することにより得
ている。この方法では、塗装方法として、フローコーテ
ィング、スプレーコーティングが利用され、通常、２コ
ート２ベーク方式が採用されている。すなわち、下塗塗
料として防錆顔料を含有する防錆プライマーを塗装して
焼付け、３〜１０μｍの下塗塗膜を形成した後、バイン
ダー１００重量部に対して着色粒子を１５０〜２００重
量部含む上塗塗料を塗装して焼付け、３０〜５０μｍの
上塗塗膜を形成している。一方、上記の方法において、
多量の着色顔料を含有する防錆プライマーを用いる場合
には、下塗塗膜の表面平滑性が低下し、上塗塗膜との密
着性が低下する。また上塗塗膜との密着性の低下に伴い
、加工性、防蝕性なども低下する。従って、上塗塗膜と
の密着性を確保するためには、プライマー中の着色顔料
の含有量を極力小さくし、上塗塗料中の着色粒子により
、鋼板の化粧色を発現させる必要がある。BACKGROUND OF THE INVENTION Conventionally, coated steel plates exhibiting a matte and velvety appearance have been obtained by coating steel plates with a coating composition containing colored particles of 40 to 60 μm and a binder. In this method, flow coating and spray coating are used as coating methods, and a two-coat, two-bake method is usually adopted. That is, after coating and baking a rust-preventing primer containing a rust-preventing pigment as an undercoat to form an undercoat film of 3 to 10 μm, a topcoat containing 150 to 200 parts by weight of colored particles to 100 parts by weight of binder is applied. is coated and baked to form a topcoat film of 30 to 50 μm. On the other hand, in the above method,
When a rust-preventing primer containing a large amount of colored pigment is used, the surface smoothness of the undercoat film decreases, and the adhesion with the topcoat film decreases. Furthermore, as the adhesion with the top coat decreases, processability, corrosion resistance, etc. also decrease. Therefore, in order to ensure adhesion with the top coat, it is necessary to minimize the content of colored pigment in the primer and to allow the colored particles in the top coat to develop the decorative color of the steel plate.
【０００３】しかしながら、上塗塗料中の着色粒子は、
粒径が大きく、着色力が小さいので、上塗塗膜の隠蔽力
が小さい。そこで、隠蔽力を大きくするために、従来、
（１）上塗塗膜の膜厚を、例えば３０μｍ以上とする方
法、（２）上塗塗料に通常の着色顔料を混入させる方法
が採用さている。しかしながら、前記（１）の方法では
、厚膜を形成するため、塗装鋼板が極めて高価となるだ
けでなく、焼付け時に塗膜が発泡しピンホールが発生し
易くなる。また発泡現象を抑制するには、塗装技術に熟
練を要すると共に、生産性が低下する。これに対して、
前記（２）の方法では、例えば、２０μｍ程度の上塗塗
膜で隠蔽力を高めることができる。しかしながら、この
方法では、塗膜中で、着色顔料が着色粒子の周囲に付着
凝集するので、着色粒子の機能、すなわち、低光沢でソ
フトなビロード感を発現する機能が著しく損なわれる。[0003] However, the colored particles in the top coat paint are
Since the particle size is large and the tinting power is low, the hiding power of the top coat is low. Therefore, in order to increase the hiding power, conventionally,
(1) A method in which the thickness of the top coat is made to be, for example, 30 μm or more, and (2) a method in which a normal colored pigment is mixed into the top coat are adopted. However, in the above method (1), since a thick film is formed, not only the coated steel sheet becomes extremely expensive, but also the coating film tends to foam during baking and pinholes are likely to occur. Moreover, in order to suppress the foaming phenomenon, skill in painting techniques is required and productivity is reduced. On the contrary,
In the method (2) above, for example, the hiding power can be increased with a top coat film of about 20 μm. However, in this method, the colored pigment adheres and aggregates around the colored particles in the coating film, so that the function of the colored particles, that is, the function of expressing a soft velvety feel with low gloss, is significantly impaired.
【０００４】0004
【発明が解決しようとする課題】従って、本発明の主た
る目的は、塗膜の膜厚が小さく、しかも、低光沢でソフ
トなビロード調の手触り感を有し、外観、隠蔽性、加工
性及び防蝕性などに優れたプレコート鋼板の製造方法を
提供することにある。[Problems to be Solved by the Invention] Therefore, the main object of the present invention is to provide a coating film having a small thickness, low gloss, and a soft velvety feel to the touch, and to improve appearance, hiding performance, processability, and An object of the present invention is to provide a method for manufacturing a prepainted steel sheet with excellent corrosion resistance.
【０００５】本発明の他の目的は、上記の如き優れた特
性に加えて、メタリック感を有するプレコート鋼板の製
造方法を提供することにある。Another object of the present invention is to provide a method for producing a precoated steel sheet that has a metallic feel in addition to the excellent properties described above.
【０００６】[0006]
【課題を解決するための手段】本発明は、鋼板の少なく
とも一方の面に、防錆顔料と着色顔料とを含む塗料１０
０重量部に対して、ビニル共重合体を１〜２０重量部含
む下塗塗料を塗布して焼付け、３〜１０μｍの下塗塗膜
を形成した後、バインダー１００重量部に対して、下塗
塗料と同一系統色の平均粒子径１〜８０μｍの着色粒子
を１５０〜２００重量部含む上塗塗料を塗布して焼付け
、１２〜２５μｍの上塗塗膜を形成するプレコート鋼板
の製造方法を提供する。[Means for Solving the Problems] The present invention provides a coating material 10 containing a rust preventive pigment and a coloring pigment on at least one surface of a steel plate.
After applying and baking an undercoat containing 1 to 20 parts by weight of a vinyl copolymer to 0 parts by weight to form an undercoat film of 3 to 10 μm, apply the same amount as the undercoat to 100 parts by weight of the binder. To provide a method for producing a pre-coated steel sheet, in which a top coat containing 150 to 200 parts by weight of colored particles having an average particle diameter of 1 to 80 μm in a series color is applied and baked to form a top coat film of 12 to 25 μm.
【０００７】また本発明は、上記の上塗塗料に、粒径５
〜２５０μｍのメタリック調物質を加えたプレコート鋼
板の製造方法を提供する。[0007] Furthermore, the present invention provides that the above-mentioned top coat has a particle size of 5.
Provided is a method for manufacturing a pre-coated steel sheet to which a metallic substance of ~250 μm is added.
【０００８】本明細書において、「同一系統色」とは、
対比する色が目視により略同色であることを意味する。[0008] In this specification, "same color" means
This means that the contrasting colors are approximately the same color when visually observed.
【０００９】「着色粒子」には、平均粒子径が１〜８０
μｍであり、かつ着色している限り、着色したポリマー
粒子、着色顔料が樹脂でコーティングされた粒子なども
含まれる。"Colored particles" have an average particle diameter of 1 to 80
As long as they are micrometers and colored, they also include colored polymer particles, particles coated with colored pigments with resin, and the like.
【００１０】0010
【作用】本発明で使用する鋼板は、特に制限されず、例
えば、亜鉛メッキ鋼板、ステンレス鋼板、亜鉛−アルミ
ニウムメッキ鋼板、冷延鋼板などが例示される。[Operation] The steel plate used in the present invention is not particularly limited, and examples thereof include galvanized steel plate, stainless steel plate, zinc-aluminum plated steel plate, cold-rolled steel plate, and the like.
【００１１】下塗塗料に含有される防錆顔料としては、
例えば、クロム酸亜鉛、クロム酸ストロンチウム、クロ
ム酸鉛、トリポリリン酸二水素アルミニウム、メタホウ
酸バリウム、ホウ酸バリウム、ホウ酸亜鉛、モリブデン
酸カルシウムなどが例示される。これらの防錆顔料は少
なくとも一種含有される。[0011] The rust-preventive pigments contained in the undercoat are as follows:
Examples include zinc chromate, strontium chromate, lead chromate, aluminum dihydrogen tripolyphosphate, barium metaborate, barium borate, zinc borate, and calcium molybdate. At least one of these antirust pigments is contained.
【００１２】着色顔料は、無機又は有機顔料のいずれで
あってもよく、例えば、酸化チタン、クロムイエロー、
カドミウムイエロー、ニッケルチタンイエロー、ベンガ
ラ、カドミウムレッド、モリブデンオレンジ、ミロリブ
ルー、ウルトラマリンブルー、カーボンブラックなどの
無機顔料；アゾ系顔料、トリフェニルメタン系顔料、キ
ナクリドン系顔料、スレン系顔料、ピレン系顔料、フタ
ロシアニン系顔料、イソインドリノン系顔料などの有機
顔料が挙げられる。また着色顔料には、タルク、硫酸バ
リウム、炭酸カルシウムなどの体質顔料な含まれる。こ
れらの着色顔料は、少なくとも一種使用され、二種以上
の異なる色相の着色顔料を用いて調色してもよい。The colored pigment may be either an inorganic or organic pigment, such as titanium oxide, chrome yellow,
Inorganic pigments such as cadmium yellow, nickel titanium yellow, red iron, cadmium red, molybdenum orange, Milori blue, ultramarine blue, carbon black; azo pigments, triphenylmethane pigments, quinacridone pigments, threne pigments, pyrene pigments, Examples include organic pigments such as phthalocyanine pigments and isoindolinone pigments. Coloring pigments also include extender pigments such as talc, barium sulfate, and calcium carbonate. At least one type of these color pigments is used, and the color may be adjusted by using two or more types of color pigments of different hues.
【００１３】上記防錆顔料及び着色顔料を含む下塗塗料
には、バインダーが含まれている。このバインダーは、
焼付け可能であればよく、例えば、ポリエステル、アク
リル樹脂、フッ素樹脂、シリコーンポリエステル、アル
キド樹脂、エポキシ樹脂などが例示される。これらのバ
インダーは一種又は二種以上混合して使用できる。また
下塗塗料は、上記バインダーに応じた硬化剤、例えば、
メチル化メラミン、ブチル化メラミンなどのアミノ樹脂
、ブロックイソシアネートなどを含んでいてもよい。
また焼付け硬化を促進するため、例えば、酸触媒などを
含んでいてもよい。[0013] The undercoat paint containing the above-mentioned rust-preventing pigment and coloring pigment contains a binder. This binder is
Any material that can be baked may be used, and examples thereof include polyester, acrylic resin, fluororesin, silicone polyester, alkyd resin, and epoxy resin. These binders can be used alone or in combination of two or more. In addition, the undercoat paint contains a curing agent depending on the above-mentioned binder, for example,
It may also contain amino resins such as methylated melamine and butylated melamine, blocked isocyanates, and the like. Further, in order to promote hardening by baking, it may contain, for example, an acid catalyst.
【００１４】そして、下塗塗料１００重量部に対して、
ビニル共重合体が１〜２０重量部、好ましくは１〜１０
重量部含有されている。ビニル共重合体が１重量部未満
である場合には、表面平滑性が損なわれるだけでなく、
鋼板との密着性が損なわれる。従って、特に、ロールコ
ーターを用いて高温高速で焼付けする２コート２ベーク
方式においては、プレコート鋼板を連続的に効率よく製
造するのが困難である。また２０重量部を越える場合に
は、耐候性が低下する場合がある。上記範囲のビニル共
重合体を含有する下塗塗料は、鋼板との密着性に著しく
優れていると共に、防錆顔料及び着色顔料に対する分散
性に優れている。従って、多量の防錆顔料及び着色顔料
を含有させ、隠蔽力を大きくできると共に、表面平滑性
に優れた下塗塗膜を形成でき、上塗塗膜との密着性にも
優れる。ビニル共重合体としては、塩化ビニル、酢酸ビ
ニルなどのビニル系モノマー単位を含む共重合体、特に
塩化ビニル単位を含む共重合体が好ましい。このような
ビニル共重合体としては、例えば、ユニオンカーバイド
社製、商品名ビニライト（Ｖｉｎｙｌｉｔｅ）ＶＭＣＨ
、日本ゼオン（株）製、商品名ゲオン（Ｇｅｏｎ）４０
０×１１０Ａ、及びグッドリッチ・ケミカル社製、商品
名ゲオン（Ｇｅｏｎ）４００×１１０などが挙げられる
。[0014] And, based on 100 parts by weight of the undercoat paint,
1 to 20 parts by weight of vinyl copolymer, preferably 1 to 10 parts by weight
Contains parts by weight. If the amount of vinyl copolymer is less than 1 part by weight, not only will surface smoothness be impaired, but
Adhesion with the steel plate is impaired. Therefore, it is difficult to continuously and efficiently produce a precoated steel sheet, especially in a two-coat, two-bake method in which baking is performed at high temperature and high speed using a roll coater. Moreover, if it exceeds 20 parts by weight, weather resistance may deteriorate. An undercoat containing a vinyl copolymer in the above range has extremely good adhesion to a steel plate, and also has excellent dispersibility for antirust pigments and color pigments. Therefore, it is possible to increase the hiding power by containing a large amount of rust-preventing pigments and coloring pigments, and also to form an undercoat film with excellent surface smoothness and excellent adhesion to the top coat film. As the vinyl copolymer, copolymers containing vinyl monomer units such as vinyl chloride and vinyl acetate are preferred, particularly copolymers containing vinyl chloride units. Examples of such vinyl copolymers include, for example, Vinylite VMCH manufactured by Union Carbide Co., Ltd.
, manufactured by Nippon Zeon Co., Ltd., product name Geon 40
0x110A, and Geon 400x110, manufactured by Goodrich Chemical Company.
【００１５】なお、防錆顔料の含有量は、防錆性を確保
できる範囲であればよい。[0015] The content of the rust-preventive pigment may be within a range that ensures rust-preventive properties.
【００１６】また下塗塗料は、通常、水、アルコール類
、脂肪族炭化水素類、芳香族炭化水素類、エステル類、
ケトン類、エーテル類などの有機溶媒が含まれている。[0016] The undercoat usually contains water, alcohols, aliphatic hydrocarbons, aromatic hydrocarbons, esters,
Contains organic solvents such as ketones and ethers.
【００１７】上記下塗塗料を前記鋼板に塗布して焼付け
、３〜１０μｍ、好ましくは４〜７．５μｍの下塗塗膜
を形成する。下塗塗膜の膜厚が３μｍ未満である場合に
は、通常、隠蔽性が十分でなく、１０μｍを越える場合
には、上塗塗膜を含めた塗膜全体の膜厚が大きくなる。[0017] The above-mentioned undercoat paint is applied to the above-mentioned steel plate and baked to form an undercoat film with a thickness of 3 to 10 μm, preferably 4 to 7.5 μm. When the film thickness of the undercoat film is less than 3 μm, the hiding property is usually insufficient, and when it exceeds 10 μm, the film thickness of the entire paint film including the top coat film becomes large.
【００１８】上塗塗料には、下塗塗料の着色顔料と同一
系統色の着色粒子が含まれている。着色粒子の平均粒子
径は１〜８０μｍ、好ましくは２０〜５０μｍである。
着色粒子の平均粒子径が上記範囲を外れる場合には、低
光沢でソフトなビロード調の手触り感を有する上塗塗膜
を形成するのが困難である。[0018] The top coat contains colored particles having the same color system as the colored pigment of the base coat. The average particle diameter of the colored particles is 1 to 80 μm, preferably 20 to 50 μm. When the average particle diameter of the colored particles is outside the above range, it is difficult to form a topcoat film with low gloss and a soft, velvety feel to the touch.
【００１９】上記着色粒子としては、例えば、着色した
ポリマー粒子；無機又は有機顔料を、ポリマー、例えば
、ポリエステル、ポリアミド、アクリル樹脂及びその他
の変性ポリマーなどでコーティングした粒子などが挙げ
られる。特に、着色した弾性ポリマーからなる球状粒子
や、無機又は有機顔料を、弾性を有するポリマーでコー
ティングした球状粒子が好ましい。上記弾性ポリマーの
伸び率は１０〜１０００％であるのが好ましい。伸び率
が１０％未満の場合には、塗膜のソフト感が小さく、１
０００％を越える場合には、塗膜に傷が付き易くなる。
弾性球状粒子は、ビロード調の手触り感を向上させる。Examples of the colored particles include colored polymer particles; particles obtained by coating inorganic or organic pigments with polymers such as polyester, polyamide, acrylic resin, and other modified polymers. Particularly preferred are spherical particles made of a colored elastic polymer and spherical particles coated with an inorganic or organic pigment with an elastic polymer. The elongation rate of the elastic polymer is preferably 10 to 1000%. If the elongation rate is less than 10%, the soft feeling of the coating film will be small, and the
If it exceeds 000%, the coating film is likely to be damaged. Elastic spherical particles improve the velvety feel.
【００２０】さらに、着色粒子のポリマーは、焼付けに
より変色しないポリマー、特にアクリル樹脂であるのが
好ましい。より詳細には、ポリウレタン又はアクリル樹
脂でコーティングされた着色粒子を用いた白色塗料と黒
色塗料を、高温高速条件下で焼付けした場合、各塗膜の
変色度をハンターのＬａｂ（△Ｅ）法により測定すると
、表１に示すような結果が得られる。なお、焼付け条件
は、焼付け時間２分、焼付け温度２００℃、２６０℃で
あり、焼付け温度１８０℃の場合を基準とした。Furthermore, the polymer of the colored particles is preferably a polymer that does not change color upon baking, especially an acrylic resin. More specifically, when white paint and black paint using colored particles coated with polyurethane or acrylic resin are baked under high temperature and high speed conditions, the degree of discoloration of each paint film is measured using Hunter's Lab (ΔE) method. When measured, the results shown in Table 1 are obtained. The baking conditions were a baking time of 2 minutes, a baking temperature of 200°C and a baking temperature of 260°C, based on a baking temperature of 180°C.
【００２１】[0021]
【表１】[Table 1]
【００２２】表１より、着色粒子のポリマーがアクリル
樹脂である場合には、変色が小さく、高温で高速焼付け
して塗装する場合に特に有用である。From Table 1, when the polymer of the colored particles is an acrylic resin, discoloration is small and it is particularly useful when painting by baking at a high temperature and high speed.
【００２３】着色粒子は吸油量４０〜１３０％、隠蔽力
３０〜２００ｇ／ｍ２ であるのが好ましい。吸油量が
４０％未満の着色粒子は一般に製造が困難であり、吸油
量が１３０％を越える着色粒子は分散性が低下する。ま
た隠蔽力が３０ｇ／ｍ２ 未満である場合には、上塗塗
膜の隠蔽力が小さく、２００ｇ／ｍ２ を越える場合に
は、手触り感が低下する。The colored particles preferably have an oil absorption of 40 to 130% and a hiding power of 30 to 200 g/m2. Colored particles with an oil absorption of less than 40% are generally difficult to manufacture, and colored particles with an oil absorption of more than 130% have poor dispersibility. If the hiding power is less than 30 g/m2, the hiding power of the topcoat film will be low, and if it exceeds 200 g/m2, the feel to the touch will be poor.
【００２４】このような着色粒子は、ウェチコン（Ｕｅ
ｔｉｋｏｎ ）社から商品名デコシルクの各色として、
積水化成（株）から商品名テクマ−ＭＢ１０Ｘ−２０−
Ｂ６、大日精化工業（株）から商品名ラブコロールの各
色として、東洋紡績（株）から商品名タフチックの各色
として入手できる。なお、これらの着色粒子の中で、ア
クリル樹脂をコーティングポリマーとした商品名ラブコ
ロールの各色は、高温焼付けにおいても変色の程度が著
しく小さいので好ましい。[0024] Such colored particles are Wechicon (Ue
As each color of the product name Deco Silk from tikon) company,
Product name Tekuma-MB10X-20- from Sekisui Plastics Co., Ltd.
B6 is available from Dainichiseika Kakogyo Co., Ltd. under the trade name Lovecolor, and from Toyobo Co., Ltd. under the trade name Tuftic. Among these colored particles, the colors under the trade name Love Color, which use acrylic resin as the coating polymer, are preferable because the degree of discoloration is extremely small even when baked at high temperatures.
【００２５】着色粒子は少なくとも一種使用され、二種
以上の異なる色相の着色粒子を用いて調色してもよい。At least one type of colored particles is used, and two or more types of colored particles of different hues may be used to adjust the color.
【００２６】上記着色粒子の含有量は、上塗塗料のバイ
ンダー１００重量部に対して、１５０〜２００重量部で
ある。着色粒子の含有量が１５０重量部未満である場合
には、ソフト感や、ビロード調の手触り感が低下し、２
００重量部を越える場合には、上塗塗料のコストが極め
て高くなる。The content of the colored particles is 150 to 200 parts by weight based on 100 parts by weight of the binder of the top coating. If the content of colored particles is less than 150 parts by weight, the soft feel and velvety feel to the touch will decrease, and the
If the amount exceeds 0.00 parts by weight, the cost of the top coating becomes extremely high.
【００２７】さらに、上塗塗料に、メタリック調物質で
ある金属粉、マイカ粉を加えることにより、メタリック
感を付加でき、調色もできる。メタリック調物質の粒径
は、５〜２５０μｍ、好ましくは１０〜５０μｍ程度で
ある。またメタリック調物質の添加量は、上塗塗料のバ
インダー１００重量部に対して、０．１〜１０重量部、
好ましくは０．５〜１．５重量部程度である。メタリッ
ク調物質の添加量が０．１重量部未満である場合には、
メタリック感が発現せず、１０重量部を越える場合には
、ビロード調子が消失する。Furthermore, by adding metal powder or mica powder, which are metallic substances, to the top coat, a metallic feel can be added and the color can be adjusted. The particle size of the metallic substance is about 5 to 250 μm, preferably about 10 to 50 μm. The amount of the metallic substance added is 0.1 to 10 parts by weight per 100 parts by weight of the binder of the top coat.
Preferably it is about 0.5 to 1.5 parts by weight. If the amount of the metallic substance added is less than 0.1 part by weight,
If the amount exceeds 10 parts by weight without producing a metallic feel, the velvety tone will disappear.
【００２８】上塗塗料に含まれるバインダーとしては、
前記下塗塗料のバインダーが使用できる。上塗塗料のバ
インダーは、下塗塗膜との密着性を高めるため、下塗塗
料のバインダーと同系統のバインダーが好ましい。例え
ば、下塗塗料のバインダーがポリエステルである場合、
上塗塗料のバインダーはポリエステルであるのが好まし
い。[0028] The binder contained in the top coat is as follows:
The binder of the above-mentioned undercoat paint can be used. The binder of the top coat is preferably a binder of the same type as the binder of the base coat in order to improve the adhesion with the base coat. For example, if the binder of the primer paint is polyester,
Preferably, the binder of the top coat is polyester.
【００２９】また上塗塗料には、通常、下塗塗料と同じ
く、硬化剤、水や有機溶媒などが含まれている。[0029] Also, the top coat usually contains a curing agent, water, an organic solvent, etc., like the base coat.
【００３０】上記上塗塗料を下塗塗膜に塗布して焼付け
、１２〜２５μｍ、好ましくは１５〜２２μｍの上塗塗
膜を形成することにより、低光沢で、ソフト感、ビロー
ド調の手触り感に優れたプレコート鋼板が得られる。
またメタリック調物質を上塗塗料に加えることにより、
低光沢で、ソフト感、ビロード調の手触り感のあるメタ
リック外観に優れたプレコート鋼板が得られる。[0030] The above-mentioned top coat is applied to the base coat and baked to form a top coat of 12 to 25 μm, preferably 15 to 22 μm, which provides a low gloss, soft feel, and excellent velvety feel to the touch. A prepainted steel plate is obtained. In addition, by adding a metallic substance to the top coat,
A pre-coated steel sheet with low gloss, a soft feel, and an excellent metallic appearance with a velvety feel to the touch can be obtained.
【００３１】なお、下塗塗料及び上塗塗料の塗布には、
慣用の塗布手段、例えば、スプレーコーティングなどが
採用できるが、ロールコーティングにより、高速下で連
続的かつ効率よく塗布するのが好ましい。下塗塗料及び
上塗塗料は、鋼板の少なくとも一方の面に塗布すればよ
い。[0031] In addition, for applying the undercoat paint and topcoat paint,
Although conventional application means such as spray coating can be employed, continuous and efficient application at high speeds is preferred by roll coating. The undercoat paint and the top coat paint may be applied to at least one surface of the steel plate.
【００３２】また焼付け条件は、適宜選択でき、スプレ
ー塗装の場合には、通常、温度１５０℃、２０分の焼付
け条件で行うことができ、ロール塗装の場合には、スプ
レー塗装よりも高温高速条件、例えば、温度２００〜２
６０℃、５０〜１２０秒の焼付け条件で行うことができ
る。[0032] Baking conditions can be selected as appropriate; in the case of spray painting, the baking conditions are usually 150°C for 20 minutes, and in the case of roll painting, the baking conditions are higher and higher speed than in spray painting. , for example, temperature 200-2
Baking can be carried out at 60° C. for 50 to 120 seconds.
【００３３】本発明の方法においては、表面平滑性、隠
蔽力、鋼板との密着性に優れた下塗塗膜を形成した後、
低光沢で、ソフト感、ビロード調の手触り感、ビロード
調の手触り感のあるメタリック外観、下塗塗膜との密着
性に優れた上塗塗膜を形成するので、ロールコーターを
用いて焼付けする２コート２ベーク方式、特に高温高速
下で焼付けにより、プレコート鋼板を連続的に効率よく
製造する上で特に有用である。In the method of the present invention, after forming an undercoat film with excellent surface smoothness, hiding power, and adhesion to the steel plate,
It is a 2-coat product that is baked using a roll coater because it has low gloss, a soft feel, a velvety feel to the touch, a metallic appearance with a velvety feel to the touch, and a topcoat film with excellent adhesion to the base coat film. The two-bake method, particularly baking at high temperatures and high speeds, is particularly useful for continuously and efficiently producing precoated steel sheets.
【００３４】[0034]
【実施例】以下に、実施例に基づいて本発明をより詳細
に説明する。EXAMPLES The present invention will be explained in more detail below based on examples.
【００３５】
下塗塗料ベースの調製
（１）アクリル樹脂（三井東圧化学（株）製、商品名７
４８−５Ｍ、固形分５５重量％）１００重量部、アミノ
樹脂（三井東圧化学（株）製、商品名１０Ｓ−６０、固
形分６０重量％）２０重量部、クロム酸ストロンチウム
５重量部、およびカーボンブラック４重量部をアトライ
ターにより５時間混合分散し、下塗塗料用ベース（１）
を調製した。Preparation of base coating paint base (1) Acrylic resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name 7)
48-5M, solid content 55% by weight) 100 parts by weight, amino resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name 10S-60, solid content 60% by weight) 20 parts by weight, strontium chromate 5 parts by weight, and Mix and disperse 4 parts by weight of carbon black using an attritor for 5 hours to create a base for undercoating paint (1)
was prepared.
【００３６】
（２）ポリエステル（三井東圧化学（株）製、商品名Ｐ
−６４６、固形分６０重量％）１００重量部、アミノ樹
脂（三井東圧化学（株）製、商品名１０Ｓ−６０）２０
重量部、Ｋ−ホワイト（帝国化工（株）製）１０重量部
、および酸化チタン２０重量部をアトライターにより５
時間混合分散し、下塗塗料用ベース（２）を調製した。(2) Polyester (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name P)
-646, solid content 60% by weight) 100 parts by weight, amino resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name 10S-60) 20
5 parts by weight, 10 parts by weight of K-White (manufactured by Teikoku Kako Co., Ltd.), and 20 parts by weight of titanium oxide using an attritor.
The mixture was mixed and dispersed for a period of time to prepare an undercoat base (2).
【００３７】
（３）高分子ポリエステル（三井東圧化学（株）製、商
品名ＨＭＰ−２５、固形分５０重量％）１００重量部、
メラミン樹脂（三井東圧化学（株）製、商品名サイメル
３０３、固形分９８〜１００重量％）１５重量部、ｐ−
トルエンスルホン酸０．１５重量部、クロム酸亜鉛１０
重量部、およびフタロシアニンブルー４重量部をアトラ
イターにより５時間混合分散し、下塗塗料用ベース（３
）を調製した。(3) 100 parts by weight of high molecular polyester (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name HMP-25, solid content 50% by weight),
Melamine resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name Cymel 303, solid content 98-100% by weight) 15 parts by weight, p-
0.15 parts by weight of toluenesulfonic acid, 10 parts by weight of zinc chromate
parts by weight and 4 parts by weight of phthalocyanine blue were mixed and dispersed using an attritor for 5 hours to form a base for undercoating paint (3 parts by weight).
) was prepared.
【００３８】
上塗塗料の調製
（ａ）アクリル樹脂（三井東圧化学（株）製、商品名７
４８−５Ｍ、）１００重量部に対して、アミノ樹脂（三
井東圧化学（株）製、商品名１０Ｓ−６０）２０重量部
、着色粒子（東洋紡績（株）製、商品名タフチックＣＢ
−１０７）１０８重量部、アルミニウム粉０．５重量部
を添加し、ペイントコンディショナーにより１時間混合
し、上塗塗料（ａ）を調製した。なお、着色粒子の含有
量は、アクリル樹脂及びアミノ樹脂のバインダー１００
重量部に対して１６１重量部である。またアルミニウム
粉の含有量は、バインダー１００重量部に対して０．７
重量部である。Preparation of top coating (a) Acrylic resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name 7)
48-5M, ), 20 parts by weight of amino resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name: 10S-60), colored particles (manufactured by Toyobo Co., Ltd., trade name: Toughtic CB)
-107) 108 parts by weight and 0.5 parts by weight of aluminum powder were added and mixed for 1 hour using a paint conditioner to prepare a top coat (a). In addition, the content of colored particles is 100% of the binder of acrylic resin and amino resin.
It is 161 parts by weight. The content of aluminum powder is 0.7 parts by weight per 100 parts by weight of the binder.
Parts by weight.
【００３９】
（ｂ）ポリエステル（三井東圧化学（株）製、商品名Ｐ
−６４６）１００重量部に対して、アミノ樹脂（三井東
圧化学（株）製、商品名１０Ｓ−６０）２０重量部、着
色粒子（ウェチコン（Ｕｅｔｉｋｏｎ ）社、商品名デ
コシルクホワイトＮＹ）１３０重量部を添加し、ペイン
トコンディショナーにより１時間混合し、上塗塗料（ｂ
）を調製した。なお、着色粒子の含有量は、ポリエステ
ル及びアミノ樹脂のバインダー１００重量部に対して１
８１重量部である。(b) Polyester (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name P)
-646) 100 parts by weight, 20 parts by weight of amino resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name 10S-60), 130 parts by weight of colored particles (manufactured by Uetikon, trade name Deco Silk White NY) of paint, mix for 1 hour with paint conditioner, and add top coat (b
) was prepared. The content of colored particles is 1 part by weight per 100 parts by weight of the polyester and amino resin binder.
It is 81 parts by weight.
【００４０】
（ｃ）高分子ポリエステル（三井東圧化学（株）製、商
品名ＨＭＰ−２５）１００重量部に対して、メラミン樹
脂（三井東圧化学（株）製、商品名サイメル３０３）１
５重量部、ｐ−トルエンスルホン酸０．１５重量部、着
色粒子（大日精化工業（株）製、商品名ラブコロール０
６０ブルー）１３０重量部、マイカ粉１．０重量部を添
加し、ペイントコンディショナーにより１時間混合し、
上塗塗料（ｃ）を調製した。なお、着色粒子の含有量は
、ポリエステル及びメラミン樹脂のバインダー１００重
量部に対して２００重量部である。またマイカ粉の含有
量は、バインダー１００重量部に対して１．５重量部で
ある。(c) 100 parts by weight of polymeric polyester (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name HMP-25) to 1 part by weight of melamine resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name Cymel 303)
5 parts by weight, 0.15 parts by weight of p-toluenesulfonic acid, colored particles (manufactured by Dainichiseika Kagyo Co., Ltd., trade name: Love Color 0)
60 Blue) and 1.0 parts by weight of mica powder were added and mixed for 1 hour using a paint conditioner.
A top coat (c) was prepared. The content of the colored particles is 200 parts by weight based on 100 parts by weight of the polyester and melamine resin binder. The content of mica powder is 1.5 parts by weight based on 100 parts by weight of the binder.
【００４１】
（ｄ）高分子ポリエステル（日本触媒化学（株）製、商
品名アロプラッツＯＢ−６３、固形分５０重量％）１０
０重量部に対して、メラミン樹脂（三井東圧化学（株）
製、商品名サイメル３０３）１５重量部、ｐ−トルエン
スルホン酸０．１５重量部、着色粒子（大日精化工業（
株）製、商品名ラブコロール０１０Ｆホワイト）９８重
量部を添加し、ペイントコンディショナーにより１時間
攪拌し、上塗塗料（ｄ）を調製した。なお、着色粒子の
含有量は、ポリエステル及びメラミン樹脂のバインダー
１００重量部に対して１５１重量部である。(d) High molecular polyester (manufactured by Nippon Shokubai Kagaku Co., Ltd., trade name Alloplatz OB-63, solid content 50% by weight) 10
Melamine resin (Mitsui Toatsu Chemical Co., Ltd.)
15 parts by weight (manufactured by Cymel 303, trade name), 0.15 parts by weight of p-toluenesulfonic acid, colored particles (Dainichiseika Kogyo Co., Ltd.), 0.15 parts by weight of p-toluenesulfonic acid,
Co., Ltd., trade name: Love Color 010F White) was added thereto, and the mixture was stirred for 1 hour using a paint conditioner to prepare a top coat (d). The content of the colored particles is 151 parts by weight based on 100 parts by weight of the polyester and melamine resin binder.
【００４２】
（ｅ）高分子ポリエステル（日本触媒化学（株）製、商
品名アロプラッツＯＢ−６３、固形分５０重量％）１０
０重量部に対して、メラミン樹脂（三井東圧化学（株）
製、商品名サイメル３０３）１５重量部、ｐ−トルエン
スルホン酸０．１５重量部、平均粒子形３μｍ前後の着
色粒子（積水化成（株）製、商品名テクマ−ＭＢ１０Ｘ
−２０−Ｂ６）１０５重量部を添加し、アトライターに
より１時間分散し、上塗塗料（ｅ）を調製した。なお、
着色粒子の含有量は、ポリエステル及びメラミン樹脂の
バインダー１００重量部に対して１９１重量部である。(e) High molecular polyester (manufactured by Nippon Shokubai Kagaku Co., Ltd., trade name Alloplatz OB-63, solid content 50% by weight) 10
Melamine resin (Mitsui Toatsu Chemical Co., Ltd.)
(manufactured by Sekisui Kasei Co., Ltd., trade name Cymel 303) 15 parts by weight, 0.15 parts by weight of p-toluenesulfonic acid, colored particles with an average particle size of around 3 μm (manufactured by Sekisui Kasei Co., Ltd., trade name Tekuma-MB10X)
-20-B6) was added and dispersed for 1 hour using an attritor to prepare a top coat (e). In addition,
The content of the colored particles is 191 parts by weight based on 100 parts by weight of the polyester and melamine resin binder.
【００４３】[0043]
【実験例１】前記下塗塗料用ベース（１）１００重量部
に、ビニル共重合体（ユニオンカーバイド社製、商品名
ビニライト（Ｖｉｎｙｌｉｔｅ）ＶＭＣＨ）を１重量部
添加し、テゾルバーにより３０分間攪拌して、下塗塗料
を得た。[Experimental Example 1] 1 part by weight of a vinyl copolymer (manufactured by Union Carbide, trade name: Vinylite VMCH) was added to 100 parts by weight of the base for undercoating paint (1), and the mixture was stirred for 30 minutes using a Tesol bar. , a base coat was obtained.
【００４４】得られた下塗塗料を、ロールコーターを用
いて、ステンレス鋼板に塗布し、高温高速下、すなわち
温度２２０〜２５０℃で５０〜９０秒間で焼付け、膜厚
１０μｍの下塗塗膜を形成した。The obtained undercoat paint was applied to a stainless steel plate using a roll coater and baked at high temperature and high speed, that is, at a temperature of 220 to 250°C for 50 to 90 seconds to form an undercoat film with a film thickness of 10 μm. .
【００４５】次いで、前記上塗塗料（ａ）を下塗塗膜に
ロールコーターを用いて塗布し、上記下塗塗料と同様の
条件で、焼付けることにより、膜厚１８μｍの上塗塗膜
を形成した。Next, the above-mentioned top coat (a) was applied to the undercoat film using a roll coater, and baked under the same conditions as the above-mentioned undercoat paint to form a top coat film with a film thickness of 18 μm.
【００４６】[0046]
【実験例２】前記下塗塗料用ベース（２）１００重量部
に、ビニル共重合体（グッドリッチ・ケミカル社製、商
品名ゲオン（Ｇｅｏｎ）４００×１１０）を５重量部添
加し、テゾルバーにより３０分間攪拌した。[Experimental Example 2] 5 parts by weight of a vinyl copolymer (manufactured by Goodrich Chemical Co., trade name: Geon 400 x 110) was added to 100 parts by weight of the base (2) for the undercoat, and 30 parts by weight was added using a Tesolver. Stir for a minute.
【００４７】得られた下塗塗料を、ロールコーターを用
いて、亜鉛−アルミニウムメッキ鋼板に塗布し、実施例
１と同様の高温高速下で焼付け、膜厚５μｍの下塗塗膜
を形成した。The obtained undercoat paint was applied to a zinc-aluminum plated steel plate using a roll coater and baked under the same high temperature and high speed conditions as in Example 1 to form a 5 μm thick undercoat film.
【００４８】次いで、前記上塗塗料（ｂ）を下塗塗膜に
ロールコーターを用いて塗布し、上記下塗塗料と同様の
条件で、焼付けることにより、膜厚２０μｍの上塗塗膜
を形成した。Next, the above-mentioned top coat (b) was applied to the undercoat film using a roll coater, and baked under the same conditions as the above-mentioned undercoat paint to form a 20 μm thick top coat film.
【００４９】[0049]
【実験例３】前記下塗塗料用ベース（３）１００重量部
に、ビニル共重合体（日本ゼオン（株）製、商品名ゲオ
ン（Ｇｅｏｎ）４００×１１０Ａ）を１０重量部添加し
、テゾルバーにより３０分間攪拌した。得られた下塗塗
料を、ロールコーターを用いて、亜鉛メッキ鋼板に塗布
し、実施例１と同様の高温高速下で焼付け、膜厚４μｍ
の下塗塗膜を形成した。[Experimental Example 3] 10 parts by weight of a vinyl copolymer (manufactured by Nippon Zeon Co., Ltd., trade name: Geon 400 x 110A) was added to 100 parts by weight of the base for undercoating paint (3), and 30 parts by weight was added using a Tesolver. Stir for a minute. The obtained undercoat paint was applied to a galvanized steel plate using a roll coater, and baked under the same high temperature and high speed as in Example 1 to give a film thickness of 4 μm.
A base coat film was formed.
【００５０】次いで、前記上塗塗料（ｃ）を下塗塗膜に
ロールコーターを用いて塗布し、上記下塗塗料と同様の
条件で、焼付けることにより、膜厚２２μｍの上塗塗膜
を形成した。Next, the top coat (c) was applied to the undercoat using a roll coater and baked under the same conditions as the undercoat to form a top coat with a thickness of 22 μm.
【００５１】[0051]
【実験例４】前記下塗塗料用ベース（２）１００重量部
に、ビニル共重合体（グッドリッチ・ケミカル社製、商
品名ゲオン（Ｇｅｏｎ）４００×１１０）を５重量部添
加し、テゾルバーにより３０分間攪拌した。[Experimental Example 4] 5 parts by weight of a vinyl copolymer (manufactured by Goodrich Chemical Co., trade name: Geon 400 x 110) was added to 100 parts by weight of the base (2) for the undercoat, and 30 parts by weight was added using a Tesolver. Stir for a minute.
【００５２】得られた下塗塗料を、ロールコーターを用
いて、亜鉛−アルミニウムメッキ鋼板に塗布し、実施例
１と同様の高温高速下で焼付け、膜厚５μｍの下塗塗膜
を形成した。The obtained undercoat paint was applied to a zinc-aluminum plated steel plate using a roll coater and baked under the same high temperature and high speed conditions as in Example 1 to form a 5 μm thick undercoat film.
【００５３】次いで、前記上塗塗料（ｄ）を下塗塗膜に
ロールコーターを用いて塗布し、上記下塗塗料と同様の
条件で、焼付けることにより、膜厚２０μｍの上塗塗膜
を形成した。Next, the top coat (d) was applied to the undercoat using a roll coater and baked under the same conditions as the undercoat to form a top coat with a thickness of 20 μm.
【００５４】[0054]
【実験例５】前記下塗塗料用ベース（２）１００重量部
に、ビニル共重合体（グッドリッチ・ケミカル社製、商
品名ゲオン（Ｇｅｏｎ）４００×１１０）を５重量部添
加し、テゾルバーにより３０分間攪拌した。[Experimental Example 5] 5 parts by weight of a vinyl copolymer (manufactured by Goodrich Chemical Co., trade name: Geon 400 x 110) was added to 100 parts by weight of the base (2) for the undercoat, and 30 parts by weight was added using a Tesolver. Stir for a minute.
【００５５】得られた下塗塗料を、ロールコーターを用
いて亜鉛鉄板に塗布し、実施例１と同様の高温高速下で
焼付け、膜厚５μｍの下塗塗膜を形成した。The obtained undercoat paint was applied to a galvanized iron plate using a roll coater and baked under the same high temperature and high speed conditions as in Example 1 to form an undercoat film with a film thickness of 5 μm.
【００５６】次いで、前記上塗塗料（ｅ）を下塗塗膜に
ロールコーターを用いて塗布し、上記下塗塗料と同様の
条件で焼付けることにより、膜厚２０μｍの上塗塗膜を
形成した。Next, the above-mentioned top coat (e) was applied to the undercoat film using a roll coater, and baked under the same conditions as the above-mentioned undercoat paint, thereby forming a 20 μm thick top coat film.
【００５７】[0057]
【比較例１及び２】下塗塗料用ベース（３）１００重量
部に対して、ビニル共重合体（日本ゼオン（株）製、商
品名ゲオン４００×１１０Ａ）を３０重量部（比較例１
）、０．５重量部（比較例２）添加し、テゾルバーによ
り３０分間攪拌した。得られた下塗塗料を、ロールコー
ターを用いて、亜鉛メッキ鋼板に塗布し、実施例１と同
様の高温高速下で焼付け、膜厚４μｍの下塗塗膜を形成
した。[Comparative Examples 1 and 2] 30 parts by weight of a vinyl copolymer (manufactured by Nippon Zeon Co., Ltd., trade name: Geon 400 x 110A) was added to 100 parts by weight of base (3) for undercoat (Comparative Example 1).
), 0.5 parts by weight (Comparative Example 2) was added, and the mixture was stirred for 30 minutes using a Tesol bar. The obtained undercoat paint was applied to a galvanized steel plate using a roll coater and baked under the same high temperature and high speed as in Example 1 to form an undercoat film with a film thickness of 4 μm.
【００５８】次いで、前記上塗塗料（ｃ）を下塗塗膜に
ロールコーターを用いて塗布し、上記下塗塗料と同様の
条件で、焼付けることにより、膜厚２２μｍの上塗塗膜
を形成した。Next, the top coat (c) was applied to the undercoat using a roll coater and baked under the same conditions as the undercoat to form a top coat with a thickness of 22 μm.
【００５９】[0059]
【比較例３】防錆顔料を含むプライマー（日本油脂（株
）製、商品名プレカラープライマーＬＰ−２）を、ロー
ルコーターを用いて、亜鉛メッキ鋼板に塗布し、実施例
１と同様の高温高速下で焼付け、膜厚５μｍの下塗塗膜
を形成した。[Comparative Example 3] A primer containing an anti-rust pigment (manufactured by NOF Corporation, trade name: Precolor Primer LP-2) was applied to a galvanized steel plate using a roll coater, and the same temperature as in Example 1 was applied. It was baked at high speed to form an undercoat film with a film thickness of 5 μm.
【００６０】高分子ポリエステル（三井東圧化学（株）
製、商品名ＨＭＰ−２５）１００重量部に対して、アミ
ノ樹脂（三井東圧化学（株）製、商品名１０Ｓ−６０）
２０重量部、カーボンブラック３重量部、着色粒子（東
洋紡績（株）製、商品名タフチックＣＢ−１０７）１０
８重量部を添加し、ペイントコンディショナーにより５
時間混合分散して上塗塗料を得た。High molecular polyester (Mitsui Toatsu Chemical Co., Ltd.)
amino resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name 10S-60) per 100 parts by weight of
20 parts by weight, 3 parts by weight of carbon black, colored particles (manufactured by Toyobo Co., Ltd., trade name: Toughtic CB-107) 10
Add 8 parts by weight and add 5 parts by weight with paint conditioner.
A top coat was obtained by mixing and dispersing for a period of time.
【００６１】次いで、この上塗塗料を下塗塗膜にロール
コーターを用いて塗布し、上記下塗塗料と同様の条件で
、焼付けることにより、膜厚２０μｍの上塗塗膜を形成
した。Next, this top coat was applied to the undercoat using a roll coater and baked under the same conditions as for the undercoat to form a top coat with a thickness of 20 μm.
【００６２】[0062]
【比較例４】ウォッシュプライマーをスプレーにより亜
鉛メッキ鋼板に塗布し、８０℃で２０分間焼付け、膜厚
５μｍの下塗塗膜を形成した。次いで、前記上塗塗料（
ｂ）を下塗塗膜にスプレーにより塗布し、１５０℃で２
０分間焼付けることにより、膜厚４０μｍの上塗塗膜を
形成した。[Comparative Example 4] A wash primer was applied to a galvanized steel plate by spraying and baked at 80°C for 20 minutes to form an undercoat film with a thickness of 5 μm. Next, the top coat paint (
b) was applied to the undercoat film by spraying and heated at 150°C for 2 hours.
By baking for 0 minutes, a top coat film with a film thickness of 40 μm was formed.
【００６３】そして、各実施例及び比較例で得られたプ
レコート鋼板の意匠性、すなわち、ソフト感、ビロード
調の手触り感、外観、低光沢性を、優、不可の基準で評
価した。また、実施例１及び３で得られたプレコート鋼
板のメタリック感を上記と同様の基準で評価した。The design of the pre-coated steel sheets obtained in each of the Examples and Comparative Examples, ie, soft feel, velvety touch, appearance, and low gloss, were evaluated on the basis of excellent and poor. Further, the metallic feel of the pre-coated steel sheets obtained in Examples 1 and 3 was evaluated using the same criteria as above.
【００６４】また、防蝕性は、ＪＩＳ Ｋ−５４００
に準拠し、５００時間経過後の表面状態を、目視により
、上記と同様の基準で評価した。[0064] Furthermore, the corrosion resistance is determined according to JIS K-5400.
The surface condition after 500 hours was visually evaluated using the same criteria as above.
【００６５】加工性は、ＪＩＳ Ｇ３３１２に準拠し
、上記と同様の基準で評価した。Processability was evaluated in accordance with JIS G3312 using the same criteria as above.
【００６６】耐候性は、ＪＩＳ Ｋ−５４００に準拠
し、１０００時間経過後の表面状態を、目視により、上
記と同様の基準で評価した。Weather resistance was evaluated in accordance with JIS K-5400 by visually observing the surface condition after 1000 hours using the same criteria as above.
【００６７】隠蔽性は、目視によりプライマーの色が見
えないものを優、見えるものを不可とした。Concealability was evaluated as excellent if the color of the primer was not visible to the naked eye, and poor if it was visible.
【００６８】耐熱性は、２００℃で２分間、２６０℃で
２分間焼付けた塗膜の変色性が殆どないものを優、若干
あるものを良として評価した。Heat resistance was evaluated as excellent if there was almost no discoloration of the coating film baked at 200° C. for 2 minutes and at 260° C. for 2 minutes, and as good if there was some.
【００６９】結果を表２に示す。The results are shown in Table 2.
【００７０】[0070]
【表２】[Table 2]
【００７１】表２より、ビニル系共重合体の含有量が本
発明の範囲から外れる比較例１及び２では、加工性又は
防蝕性が劣る。また上塗塗料に着色粒子と着色顔料とを
含む比較例３では、塗膜の意匠性が劣り、上塗塗膜が厚
い比較例４では、プレコート鋼板のコストが高くなるだ
けでなく、塗膜にピンホールが発生した。これに対して
、各実施例で得られたプレコート鋼板は、意匠性に優れ
ると共に、安価で各種の特性を同時に満足するものであ
った。Table 2 shows that Comparative Examples 1 and 2, in which the content of the vinyl copolymer was outside the range of the present invention, had poor processability or corrosion resistance. In addition, in Comparative Example 3, in which the top coat contains colored particles and colored pigments, the design of the paint film is inferior, and in Comparative Example 4, in which the top coat is thick, not only does the cost of the pre-coated steel sheet increase, but also the paint film is A hole occurred. On the other hand, the precoated steel sheets obtained in each example had excellent design, were inexpensive, and satisfied various properties at the same time.
【００７２】また実施例１及び３のプレコート鋼板は、
メタリック感に優れていた。[0072] Furthermore, the prepainted steel sheets of Examples 1 and 3 were
It had an excellent metallic feel.
【００７３】[0073]
（１）本発明によれば、塗膜の膜厚が小さく、しかも、
低光沢でソフトなビロード調の手触り感に優れると共に
、外観、隠蔽性、加工性及び防蝕性などに優れたプレコ
ート鋼板を安価に生産性よく製造できる。(1) According to the present invention, the film thickness of the coating film is small, and
Pre-coated steel sheets can be produced at low cost and with high productivity, having low gloss and a soft, velvety feel to the touch, as well as excellent appearance, concealability, workability, and corrosion resistance.
【００７４】
（２）メタリック感のあるビロード状プレコート鋼板が
得られる。(2) A velvety pre-coated steel plate with a metallic feel can be obtained.
【００７５】
（３）金属粉などのメタリック調物質を上塗塗料に加え
るので、隠蔽性があり、膜厚を薄くでき、加工性に優れ
たプレコート鋼板が得られる。(3) Since a metallic substance such as metal powder is added to the top coat, a pre-coated steel sheet with hiding properties, a thin film thickness, and excellent workability can be obtained.
Claims (2)
料と着色顔料とを含む塗料１００重量部に対して、ビニ
ル共重合体を１〜２０重量部含む下塗塗料を塗布して焼
付け、３〜１０μｍの下塗塗膜を形成した後、バインダ
ー１００重量部に対して、下塗塗料と同一系統色の平均
粒子径１〜８０μｍの着色粒子を１５０〜２００重量部
含む上塗塗料を塗布して焼付け、１２〜２５μｍの上塗
塗膜を形成することを特徴とするプレコート鋼板の製造
方法。1. Applying an undercoating paint containing 1 to 20 parts by weight of a vinyl copolymer to 100 parts by weight of a paint containing an anti-rust pigment and a coloring pigment on at least one surface of a steel plate, and baking it. After forming an undercoat film of ~10 μm, apply a top coat containing 150 to 200 parts by weight of colored particles with an average particle diameter of 1 to 80 μm in the same color as the undercoat paint to 100 parts by weight of the binder, and bake. A method for producing a precoated steel sheet, which comprises forming a top coat film of 12 to 25 μm.
２５０μｍのメタリック調物質を加えたことを特徴とす
るプレコート鋼板の製造方法。[Claim 2] The top coat according to Claim 1 has particle sizes of 5 to 5.
A method for producing a pre-coated steel sheet, characterized in that a 250 μm metallic substance is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3008480A JPH06102178B2 (en) | 1990-02-15 | 1991-01-28 | Manufacturing method of precoated steel sheet |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3594490 | 1990-02-15 | ||
| JP2-35944 | 1990-02-15 | ||
| JP3008480A JPH06102178B2 (en) | 1990-02-15 | 1991-01-28 | Manufacturing method of precoated steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04215873A true JPH04215873A (en) | 1992-08-06 |
| JPH06102178B2 JPH06102178B2 (en) | 1994-12-14 |
Family
ID=26342995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3008480A Expired - Fee Related JPH06102178B2 (en) | 1990-02-15 | 1991-01-28 | Manufacturing method of precoated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06102178B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001181574A (en) * | 1999-12-24 | 2001-07-03 | Kansai Paint Co Ltd | Coating composition and coated metal sheet prepared by using same |
| WO2008105247A1 (en) | 2007-02-28 | 2008-09-04 | Jfe Steel Corporation | Coated steel sheet and television panel made of the sheet |
| JP2009255566A (en) * | 2008-03-27 | 2009-11-05 | Yuken Industry Co Ltd | Member having corrosion resistant laminated film, method of manufacturing the same member, treating liquid for manufacturing the same member, and coating material composition |
| JP2012155343A (en) * | 2012-04-23 | 2012-08-16 | Dainippon Printing Co Ltd | Two-dimensional viewing angle expansion member and display device |
| US8715837B2 (en) | 2008-09-09 | 2014-05-06 | Jfe Steel Corporation | Black-coated steel sheet, worked material, and panel for flat-panel television |
| WO2021031848A1 (en) * | 2019-08-16 | 2021-02-25 | 浙江飞剑工贸有限公司 | Surface treatment method for stainless steel container having laser color effect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6423188A (en) * | 1987-07-17 | 1989-01-25 | Matsushita Electric Ind Co Ltd | Moving body identification device |
-
1991
- 1991-01-28 JP JP3008480A patent/JPH06102178B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6423188A (en) * | 1987-07-17 | 1989-01-25 | Matsushita Electric Ind Co Ltd | Moving body identification device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001181574A (en) * | 1999-12-24 | 2001-07-03 | Kansai Paint Co Ltd | Coating composition and coated metal sheet prepared by using same |
| WO2008105247A1 (en) | 2007-02-28 | 2008-09-04 | Jfe Steel Corporation | Coated steel sheet and television panel made of the sheet |
| JP2009255566A (en) * | 2008-03-27 | 2009-11-05 | Yuken Industry Co Ltd | Member having corrosion resistant laminated film, method of manufacturing the same member, treating liquid for manufacturing the same member, and coating material composition |
| US8715837B2 (en) | 2008-09-09 | 2014-05-06 | Jfe Steel Corporation | Black-coated steel sheet, worked material, and panel for flat-panel television |
| JP2012155343A (en) * | 2012-04-23 | 2012-08-16 | Dainippon Printing Co Ltd | Two-dimensional viewing angle expansion member and display device |
| WO2021031848A1 (en) * | 2019-08-16 | 2021-02-25 | 浙江飞剑工贸有限公司 | Surface treatment method for stainless steel container having laser color effect |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06102178B2 (en) | 1994-12-14 |
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