JPH01258771A - Production of powder coating agent composed of thermoplastic fluorocarbon resin - Google Patents
Production of powder coating agent composed of thermoplastic fluorocarbon resinInfo
- Publication number
- JPH01258771A JPH01258771A JP4197689A JP4197689A JPH01258771A JP H01258771 A JPH01258771 A JP H01258771A JP 4197689 A JP4197689 A JP 4197689A JP 4197689 A JP4197689 A JP 4197689A JP H01258771 A JPH01258771 A JP H01258771A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- thermoplastic
- powder coating
- thermoplastic fluororesin
- topcoat
- 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.)
- Pending
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 54
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 49
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 49
- 239000000843 powder Substances 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title description 3
- 229920005989 resin Polymers 0.000 title description 3
- 239000011347 resin Substances 0.000 title description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 title 1
- 238000000576 coating method Methods 0.000 claims abstract description 75
- 239000000155 melt Substances 0.000 claims abstract description 17
- 229920002313 fluoropolymer Polymers 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 239000004811 fluoropolymer Substances 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 claims description 9
- 239000011521 glass Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002987 primer (paints) Substances 0.000 abstract 8
- 239000005002 finish coating Substances 0.000 abstract 3
- 229920001577 copolymer Polymers 0.000 description 20
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 13
- 239000000178 monomer Substances 0.000 description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 7
- 239000005977 Ethylene Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 5
- -1 polychlorotrifluoroethylene Polymers 0.000 description 5
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000010128 melt processing Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000004446 fluoropolymer coating Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229940098458 powder spray Drugs 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- BZPCMSSQHRAJCC-UHFFFAOYSA-N 1,2,3,3,4,4,5,5,5-nonafluoro-1-(1,2,3,3,4,4,5,5,5-nonafluoropent-1-enoxy)pent-1-ene Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)=C(F)OC(F)=C(F)C(F)(F)C(F)(F)C(F)(F)F BZPCMSSQHRAJCC-UHFFFAOYSA-N 0.000 description 1
- XYMIWSPIYJQJGM-UHFFFAOYSA-H 2-chloro-4-[chloro-[(2-chloro-2-oxo-1,3,2lambda5,4-dioxaphosphalumetan-4-yl)oxy]phosphoryl]oxy-1,3,2lambda5,4-dioxaphosphalumetane 2-oxide Chemical compound P(=O)([O-])([O-])Cl.[Al+3].P(=O)([O-])([O-])Cl.P(=O)([O-])([O-])Cl.[Al+3] XYMIWSPIYJQJGM-UHFFFAOYSA-H 0.000 description 1
- QMIWYOZFFSLIAK-UHFFFAOYSA-N 3,3,3-trifluoro-2-(trifluoromethyl)prop-1-ene Chemical group FC(F)(F)C(=C)C(F)(F)F QMIWYOZFFSLIAK-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229960002050 hydrofluoric acid Drugs 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/586—No clear coat specified each layer being cured, at least partially, separately
-
- 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
- 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
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- 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
- B05D2451/00—Type of carrier, type of coating (Multilayers)
-
- 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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
-
- 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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/22—Silica
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の利用分野１
本発明は、それぞれ溶融物から加工できる熱可塑性弗素
樹脂より成る下塗り塗膜および上塗り塗膜を粉末被覆法
によって塗布することによる高温安定性表面の被覆方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention 1 The present invention relates to the development of high-temperature stable surfaces by applying an undercoat and a topcoat, each consisting of a thermoplastic fluororesin which can be processed from the melt, by a powder coating method. Relating to a coating method.
［従来技術１
攻撃的媒体によって攻撃される前に表面を保護する為に
、例えばスプレー電着塗装または流動浸漬塗装の如き一
般的な粉末塗装法によって非多孔質の被覆物が、溶融物
から加工できる熱可塑性弗素樹脂から製造される。弗素
合成樹脂は沢山の化学薬品に対して優れた安定性を示し
且つ強酸および苛性ソーダによって攻撃されない。[Prior Art 1] Non-porous coatings are fabricated from the melt by common powder coating methods, such as e.g. spray electrocoating or fluidized dip coating, in order to protect the surface before it is attacked by aggressive media. Manufactured from thermoplastic fluororesin. Fluorine synthetic resins exhibit excellent stability against many chemicals and are not attacked by strong acids and caustic soda.
しかしながら弗素合成樹脂被覆物には多くの合成樹脂被
覆物のように気体、液体および溶液が浸透する。攻撃性
媒体の浸透は気泡を形成し得るし、基体からの剥離を引
起しそして結果的に基体が攻撃され得る。However, fluoroplastic coatings, like many synthetic resin coatings, are permeable to gases, liquids, and solutions. Penetration of aggressive media can form bubbles, cause delamination from the substrate and result in attack of the substrate.
か−る被覆物の浸透性は特にその膜厚に左右される；即
ち、浸透性は膜厚が厚ければ厚いほど象、速に低下する
。それ故に、基体を攻撃性媒体から攻撃される前に保護
する為に、できるだけ厚い塗膜を塗布する試みがされて
いる。か−る厚い塗膜は弗素樹脂粉末を繰り返し塗布し
そして溶融処理することによって得ようとするよう試み
られて来た。しかしながらこの工程は所望なだけ何度も
繰り返すことはできない。何故ならば熱可塑性弗素樹脂
の溶融物がある塗膜厚から重力の為に流れ初め且つ滴り
落ちるからである。The permeability of such a coating depends in particular on its thickness; ie, the permeability decreases more rapidly the thicker the layer. Therefore, attempts are made to apply as thick a coating as possible in order to protect the substrate from aggressive media before it is attacked. Attempts have been made to obtain such thick coatings by repeatedly applying and melt processing fluororesin powders. However, this process cannot be repeated as many times as desired. This is because the melted thermoplastic fluororesin begins to flow and drip due to gravity from a certain coating thickness.
更に熱可塑性弗素樹脂の溶融物は角や縁部から流失し、
その結果滴に約６ｍｍ （凸面）より小さい半径を持つ
あるいは約１２ｍｍ（凹面）より小さい半径を持つ屈曲
部のある成形体の被覆物は均一な塗膜厚を持つことがも
はやできない。この流失現象は一般に“縁部の薄化゛と
して知られている。この現象は、溶融を行うことによっ
て滴の形成を引き起こす。この現象は、例えば溶接にお
ける様に非常に薄い塗膜を製造せしめ、その部分では攻
撃性化学薬品と接触させて使用する場合に浸透が多くそ
れ故に基体に危険な腐食も生じる。Furthermore, the melted thermoplastic fluororesin flows away from the corners and edges,
As a result, coatings of molded bodies with bends in the drops having a radius of less than about 6 mm (convex) or less than about 12 mm (concave) can no longer have a uniform coating thickness. This wash-off phenomenon is commonly known as "edge thinning". This phenomenon causes the formation of droplets by performing melting. This phenomenon can lead to the production of very thin coatings, as for example in welding. , where there is high penetration and therefore dangerous corrosion of the substrate when used in contact with aggressive chemicals.
［発明の解決しようとする課題１
本発明の課題は、溶融物から加工できる熱可塑性弗素樹
脂の均一な塗膜厚の被覆物を製造することである。この
場合、塗膜厚は浸透による影響が特に小さな半径の縁部
の所でも実質的に取るに足らないほどとなる寸法である
べきである。[Problem to be Solved by the Invention 1] An object of the present invention is to produce a coating having a uniform coating thickness of a thermoplastic fluororesin that can be processed from a melt. In this case, the coating thickness should be such that the influence of penetration is practically negligible, especially at edges of small radius.
［発明の構成１
この課題は、塗装工程の間の流出を防止する為に下塗り
塗膜を形成する熱可塑性弗素樹脂の流動性を、下塗り塗
膜に直径１０〜４００μｍのガラス球を１５〜６５容量
χ添加することによって低下させることを特徴とする、
文頭に記載の方法によって解決される。[Structure 1 of the invention] This problem was aimed at improving the fluidity of the thermoplastic fluororesin that forms the undercoat film in order to prevent leakage during the coating process. characterized in that the capacity χ is reduced by adding
Solved by the method described at the beginning of the article.
被覆物の混合物の全容量を基準として１５〜６５容量χ
、殊に２０〜５０容量χのガラス球を混入した熱可塑性
弗素樹脂を用いて粉末被覆法にて厚い塗膜を、充填物不
含の弗素化重合体の場合より二倍乃至二倍はど厚く且つ
繰り返し塗布した際に溶融物が重力によって流出するこ
となしに、製造することができる。15 to 65 volumes χ based on the total volume of the coating mixture
In particular, thick coatings can be produced by powder coating using thermoplastic fluoropolymer resins mixed with glass spheres of 20 to 50 volumes χ, which are twice to twice as thick as with unfilled fluorinated polymers. It can be manufactured in thick and repeated applications without the melt flowing out due to gravity.
か−るガラス球は特定の化学薬品、例えば弗素酸または
苛性ソーダ溶液に対して安定でないので、ガラス球が充
填された溶融した熱可塑性弗素樹脂−下塗り塗膜の上に
ガラス球を充填していない熱可塑性弗素樹脂−上塗り塗
膜を塗布する。□本発明の思想に従って□上記の量のガ
ラス球の添加物によって下塗り塗膜の流動性は顕著に低
下するので、上塗り塗膜の製造にも同じ熱可塑性弗素樹
脂を使用するのが好ましい。場合によっては若干低い流
動性のものを使用してもよい。これは特に、上塗り塗膜
の熱可塑性弗素樹脂が下塗り塗膜のそれと好ましくは同
じ融点および／または同じ溶融粘度を有していることを
意味する。場合によっては上塗り塗膜材料の融点が下塗
り塗膜材料のそれより約２０℃まで高くおよび／または
上塗り塗膜材料の溶融粘度（Ｐａ、ｓ）が下塗り塗膜の
熱可塑性弗素樹脂の相応する値より１０倍程多くてもよ
い。このように上塗り塗膜は場合によっては多数の区分
段階でも、この熱可塑性弗素樹脂の流出限界ぎりぎりで
下にある塗膜厚さまで問題なく塗布でき、この場合には
塗膜全体の流出は生じない。この場合流出限界とは、（
所定の流動性のある）所定の材料の溶融物が重力の影響
のもとてまさに流出し始める限界の塗膜厚を意味する。Molten thermoplastic fluoropolymer filled with glass bulbs - Do not fill the glass bulbs over the base coat because such glass bulbs are not stable to certain chemicals, such as fluoric acid or caustic soda solutions. Apply a thermoplastic fluoropolymer topcoat. □ In accordance with the idea of the present invention □ Since the fluidity of the base coat film is significantly reduced by the above-mentioned amount of glass bulb additives, it is preferred to use the same thermoplastic fluororesin for the production of the top coat film. Depending on the case, one with slightly lower fluidity may be used. This means in particular that the thermoplastic fluororesin of the topcoat preferably has the same melting point and/or the same melt viscosity as that of the basecoat. In some cases, the melting point of the topcoat material is up to about 20° C. higher than that of the basecoat material and/or the melt viscosity (Pa, s) of the topcoat material has a corresponding value of the thermoplastic fluoropolymer of the basecoat. It may be about 10 times more than that. In this way, the topcoat film can be coated without any problems, even in multiple division stages, up to the thickness of the underlying film just at the limit of flow of this thermoplastic fluororesin, and in this case, the entire paint film does not flow out. . In this case, the outflow limit is (
means the critical coating thickness at which the melt of a given material (of a given flowability) just begins to flow out under the influence of gravity.
本発明の方法の場合には、粉末被覆剤での塗装およびそ
れの溶融処理を行う加工温度および個々の上塗り塗膜の
それを、流出することなしにはヌ゛等しい水準に保つこ
とができることが特に重要である。場合によっては下塗
り塗膜は予め複数の区分段階で塗装してもよい。このよ
うに本発明の方法によれば、充填物不含の熱可塑性弗素
樹脂だけでの被覆物の三倍乃至四倍の全体塗膜１７を得
ることができる。In the case of the method according to the invention, it is possible to maintain the processing temperatures for applying the powder coating and melting it and that of the individual top coats at a uniform level without any runoff. This is especially important. Optionally, the base coat may be applied beforehand in several division stages. As described above, according to the method of the present invention, it is possible to obtain an overall coating film 17 that is three to four times as large as a coating made only of thermoplastic fluororesin without fillers.
ガラス球を充填した熱可塑性弗素樹脂塗膜は、小さい半
径の縁部の所で引き返す傾向がな（、その結果この場所
でも充分な厚さの被覆物を製造することができる。下塗
り塗膜材料での被覆によって、縁部の半径は言うに値す
る程に縁部が薄化することなしに上塗り塗膜の塗布を実
施できるほど大きく成る。Thermoplastic fluoropolymer coatings filled with glass bulbs do not tend to pull back at small radius edges (so that coatings of sufficient thickness can be produced at these locations. By coating with , the edge radius is large enough to allow the application of top coats to be carried out without appreciable edge thinning.
用いる熱可塑性弗素樹脂粉末とガラス球より成る混合物
はできるだけ均一であるべきであり、固体の為の公知の
混合装置で製造することができる。用いるガラス球は１
０〜４００μｍ、殊に２０〜２００ ｐｍの平均粒子径
を有しているべきである。この場合中実ガラス球も中空
ガラス球もこれらの混合物も使用することができる。The mixture of thermoplastic fluoropolymer powder and glass spheres used should be as homogeneous as possible and can be prepared in known mixing equipment for solids. The glass bulb used is 1
They should have an average particle size of 0 to 400 μm, in particular 20 to 200 pm. In this case it is possible to use both solid glass spheres and hollow glass spheres as well as mixtures thereof.
用いる熱可塑性弗素樹脂粉末の平均粒子径は一般に２０
〜４００ μｍ、殊に３０〜２００ μｍである。The average particle size of the thermoplastic fluororesin powder used is generally 20
-400 μm, especially 30-200 μm.
本発明の方法の範囲においては用いる、溶融物から加工
できる熱可塑性弗素樹脂は、−ａに加工温度において＜
ｌＸｌ０６Ｐａ、ｓの熔融粘度を有している。溶融物
から加工できるか＼る熱可塑性弗素樹脂には、例えばポ
リビニリデンフルオライド、ポリビニルフルオライドま
たは好ましくはポリクロロトリフルオルエチレンの如き
ホモポリマーがある。同様に、テトラフルオルエチレン
またはクロロトリフルオルエチレンの共重合単位の他に
更に少なくとも一つの別のエチレン系不飽和の共重合性
単量体を、溶融物からの加工性を保証するのに充分な量
で含有する共重合体もある。か＼る共重合体は特に以下
の群から選択される：
ａ）テトラフルオルエチレンと高級ベルフルオルオレフ
ィン、特にヘキサフルオルプロピレンとの共重合体；テ
トラフルオルエチレンと弐ＣＦｚ＝ＣＦ−ＯＲｆｚ （
式中、Ｒｆはベルフルオル化アルキル基である）で表さ
れるベルフルオルアルキルビニルエーテル、殊にベルフ
ルオルプロピルビニルエーテルとの共重合体；ヘキサフ
ルオルプロピレン並びにベルフルオルアルキルビニルエ
ーテル、殊にベルフルオルプロピルビニルエーテルを含
有するテトラフルオルエチレン共重合体；
ｂ）テトラフルオルエチレンとエチレンとの共重合体。The thermoplastic fluoropolymer used within the scope of the process of the invention, which can be processed from the melt, at a processing temperature of
It has a melt viscosity of lXl06Pa,s. Thermoplastic fluororesins that can be processed from the melt include, for example, homopolymers such as polyvinylidene fluoride, polyvinyl fluoride or, preferably, polychlorotrifluoroethylene. Similarly, in addition to the copolymerizable units of tetrafluoroethylene or chlorotrifluoroethylene, at least one further ethylenically unsaturated copolymerizable monomer is present, sufficient to ensure processability from the melt. Some copolymers contain a large amount of Such copolymers are selected in particular from the following group: a) Copolymers of tetrafluoroethylene and higher perfluoroolefins, in particular hexafluoropropylene; tetrafluoroethylene and CFz=CF- ORfz (
copolymer with belffluoroalkyl vinyl ether, especially belffluoropropyl vinyl ether, represented by the formula (Rf is a belffluorinated alkyl group); hexafluoropropylene and belffluoroalkyl vinyl ether, especially belffluor Tetrafluoroethylene copolymer containing opropyl vinyl ether; b) Copolymer of tetrafluoroethylene and ethylene.
この場合、か＼る共重合体は好ましくは少なくとも一種
類の他の共重合性単量体を含有しており、しばしば二種
類またはそれ以上含有している。か＼る共重合性単量体
は好ましくは、ベルフルオル化オレフィンの群、特にヘ
キサフルオルプロピレン：上記式のベルフルオルアルキ
ルビニルエーテルの群、特にベルフルオルプロピルビニ
ルエーテル；弗素含有オレフィンの群、特に３，３．３
− トリフルオル−２−トリフルオルメチルプロピレ
ン；ビニルエステルの群並びにビニリデンフルオライド
およびトリフルオルクロルエチレンの群から選択するの
が好ましい。In this case, such copolymers preferably contain at least one other copolymerizable monomer, often two or more. Such copolymerizable monomers preferably belong to the group of perfluorinated olefins, especially hexafluoropropylene; the group of perfluoroalkyl vinyl ethers of the above formula, especially perfluoropropyl vinyl ether; the group of fluorine-containing olefins, especially 3,3.3
- trifluoro-2-trifluoromethylpropylene; preferably selected from the group of vinyl esters and of vinylidene fluoride and trifluorochloroethylene.
場合によっては他の単量体を含有しているテトラフルオ
ルエチレン／エチレンのタイプのか−る共重合体は最高
６０モルχのテトラフルオルエチレン、６０〜４０モル
χのエチレンおよび０−１０モルχの上述の第三の単量
体および場合によっては第四の単量体より成る：Ｃ）テ
トラフルオルエチレンとビニリデンフルオライドとの共
重合体。但しが＼る共重合体は少なくとも一種類の他の
エチレン系不飽和共重合性単量体、殊に弗素含有のもの
を含有しているのが有利である。特に、この目的の為に
はヘキサフルオルプロピレンまたはベルフルオルアルキ
ルビニルエーテルが適している。Such copolymers of the tetrafluoroethylene/ethylene type, optionally containing other monomers, may contain up to 60 mol χ of tetrafluoroethylene, 60 to 40 mol χ of ethylene and 0 to 10 mol of ethylene. C) Copolymers of tetrafluoroethylene and vinylidene fluoride. However, the copolymer preferably contains at least one other ethylenically unsaturated copolymerizable monomer, in particular one containing fluorine. Particularly suitable for this purpose are hexafluoropropylene or perfluoroalkyl vinyl ethers.
場合によってはこれら両者の組み合わせも適している。In some cases, a combination of both is also suitable.
この種の熱可塑性共重合体中にはテトラフルオルエチレ
ンが５０〜８０モルχ、三元共重合体および四元共重合
体の場合には５０〜６５モル２の割合で含まれ、ビニリ
デンフルオライドは２０モルχより多い割合で含まれる
。This type of thermoplastic copolymer contains tetrafluoroethylene in a proportion of 50 to 80 mol χ, and in the case of terpolymer and quaternary copolymer, 50 to 65 mol 2; Ride is contained in a proportion of more than 20 moles χ.
テトラフルオルエチレン／ビニリデンフルオライド／へ
キサフルオルプロピレンが特に有利な組み合わせである
；
ｄ）テトラフルオルエチレンとクロロトリフルとのオル
エチレン共重合体。この場合テトラフルオルエチレン並
びにクロロトリフルオルエチレンの両方が主要成分であ
ってもよい；ｅ）エチレン系不飽和弗素含有単量体、例
えば特にヘキサフルオルプロピレン、テトラフルオルエ
チレンおよびビニリデンフルオライドとクロロトリフル
オルエチレンとの共重合体；ｆ）クロロトリフルオルエ
チレンとエチレンとの共重合体。この場合この共重合体
も好ましくは少なくとも一種類の、しばしば二種類また
は三種類の別のエチレン系不飽和共重合性単量体を含有
していてもよい。この共重合性単量体は、テトラフルオ
ルエチレン／エチレンのタイプの共重合体に付いて前述
したものと同じ群から選択することができる。Tetrafluoroethylene/vinylidene fluoride/hexafluoropropylene are particularly advantageous combinations; d) orethylene copolymers of tetrafluoroethylene and chlorotriflu. In this case both tetrafluoroethylene and chlorotrifluoroethylene may be the main components; e) ethylenically unsaturated fluorine-containing monomers, such as especially hexafluoropropylene, tetrafluoroethylene and vinylidene fluoride; Copolymer with chlorotrifluoroethylene; f) Copolymer with chlorotrifluoroethylene and ethylene. In this case, the copolymer may also preferably contain at least one, often two or three, further ethylenically unsaturated copolymerizable monomers. This copolymerizable monomer can be selected from the same group as mentioned above for copolymers of the tetrafluoroethylene/ethylene type.
上記の種類の共重合体の製法に関しては、例えば以下の
米国特許明細書を引用する：第２，９４６，７６３号、
第３．１３２．１２３号、第３．１３２．１２４号、第
４，０２９，８６８号、第４，２６２，１０１号、第３
゜６２４．２５０号、第３．８５９．２６２号、第３，
８１７．９５１号、第３．９６０，８２５号、第３．８
４７，８８１号、第４，１２３，６０２号、第２．４６
８，０５４号、第３，２３５，５３７号、第２゜５１３
．３１２号、第２．６６２．０７２号、第３，０５３，
８１８号、第２，７３８，３４３号、第２，７５２，３
３２号。更にヨーロッパ特許第２．８０９号および同第
５０，４３７号およびベルギー特許第８４４．９６５号
明細書を引用する。Regarding the preparation of copolymers of the type mentioned above, reference is made, for example, to the following US patent specifications: No. 2,946,763;
No. 3.132.123, No. 3.132.124, No. 4,029,868, No. 4,262,101, No. 3
゜624.250, No. 3.859.262, No. 3,
No. 817.951, No. 3.960,825, No. 3.8
No. 47,881, No. 4,123,602, No. 2.46
No. 8,054, No. 3,235,537, No. 2゜513
．． No. 312, No. 2.662.072, No. 3,053,
No. 818, No. 2,738,343, No. 2,752,3
No. 32. Further reference is made to European Patent No. 2.809 and European Patent No. 50,437 and Belgian Patent No. 844.965.
本発明の方法の長所は、上塗り塗膜を塗布する為に、ガ
ラス球が充填された下塗り塗膜の塗布の為のものと同じ
熱可塑性弗素樹脂を用いることができることである。し
かしながら、異なる組成の場合にも同じ流動性を示す熱
可塑性弗素樹脂、即ち同じ融点および／または同じ溶融
粘度を示すものも選択することができる。場合によって
は、それどころか上塗り塗膜の為の熱可塑性弗素樹脂の
流動性が下塗り塗膜の為の熱可塑性弗素樹脂（ガラス球
不含）の流動性より僅かに小さ（ともよい。即ち、上塗
り塗膜材料は２０℃まで高い融点を有していてもよくま
たは溶融粘度（Ｐａ 、 ｓを単位として測定す−る）
が１０倍まで高（ともよい。An advantage of the method of the present invention is that the same thermoplastic fluororesin can be used for applying the topcoat as for the application of the glass bulb-filled basecoat. However, it is also possible to select thermoplastic fluororesins which exhibit the same fluidity in different compositions, ie the same melting point and/or the same melt viscosity. In some cases, the fluidity of the thermoplastic fluoropolymer for the topcoat may even be slightly less than the fluidity of the thermoplastic fluoropolymer (without glass bulbs) for the basecoat. The membrane material may have a melting point as high as 20°C or a melt viscosity (measured in Pa, s).
is up to 10 times higher (also good).
本発明の方法によれば、高温安定性の表面に塗布するこ
とができる。即ち、基体は、熱可塑性弗素樹脂塗膜の溶
融およびそれに伴う熱の負荷の際に不利な変化をするこ
とがない。従ってこの方法は金属−、ガラス−およびセ
ラミック表面を被覆するのに適しているが、高温安定性
合成樹脂の被覆にも適している。According to the method of the invention, high temperature stable surfaces can be coated. That is, the substrate does not undergo any adverse changes during the melting of the thermoplastic fluororesin coating and the associated heat loads. This method is therefore suitable for coating metal, glass and ceramic surfaces, but also for coating high-temperature-stable synthetic resins.
実際の被覆工程の前に、被覆するべき表面を通例の方法
によって、例えば蒸気相脱脂、アルカリ性浴での処理ま
たは場合によっては被覆するべき対象物を約４００〜４
５０″Ｃに加熱することによって脱脂する。Before the actual coating process, the surface to be coated can be coated by customary methods, e.g. vapor phase degreasing, treatment with alkaline baths or, if appropriate, the object to be coated with about 400 to 400 g
Degrease by heating to 50″C.
被覆物の接合性の改善は基体を粗面化することによって
、例えばサンドブラストまたはエツチングによって達成
できる。この改善は場合によっては大きな粗面度のセラ
ミックーまたは金属中間相を例えば溶射法またはプラズ
マ被覆法によって設けることによっても達成することが
できる。被覆物の接合性が非常に大きく要求されている
場合には、ガラス球を充填した下塗り塗膜の塗布前に接
合助成塗膜をも塗布してもよい。この塗膜は一般に接合
助成物質の添加下に同じ熱可塑性弗素樹脂で構成されて
いてもよい。Improving the adhesion of the coating can be achieved by roughening the substrate, for example by sandblasting or etching. This improvement can optionally also be achieved by providing a ceramic or metallic interphase with a high surface roughness, for example by thermal spraying or plasma coating. If the adhesion properties of the coating are very demanding, an adhesion-promoting coating may also be applied before the application of the glass bulb-filled basecoat. This coating may generally consist of the same thermoplastic fluororesin with the addition of adhesion promoters.
か＼る熱可塑性弗素樹脂の為の接合助成物質としては高
温安定性の結合剤樹脂、エポキシ樹脂類、ポリアミド類
、ポリアミドイミド類、ポリイミド類、ポリトリケトイ
ミダゾ−リジン類、ポリフェニレンスルフィド類、ポリ
エーテルスシフイド類、ポリエーテルケトン類、ポリヒ
ダントイン類または無機系物質、例えばアルカリ珪酸塩
、無水クロム酸、燐酸またはアルミニウムークロロホス
ファートが適している。接合助成塗膜は粉末として通例
の粉末塗装法によってまたは分散物、懸濁物または溶液
の状態でスプレー塗装、浸漬塗装またははけ塗りによっ
て塗布する。塗布後にこの接合助成塗膜を場合によって
は乾燥しそして焼きつける。Bonding aids for such thermoplastic fluororesins include high temperature stable binder resins, epoxy resins, polyamides, polyamideimides, polyimides, polytriketoimidazolysines, polyphenylene sulfides, and Ether sulfides, polyether ketones, polyhydantoins or inorganic substances such as alkali silicates, chromic anhydride, phosphoric acid or aluminum chlorophosphate are suitable. The bond-promoting coating is applied as a powder by customary powder coating methods or in the form of a dispersion, suspension or solution by spraying, dipping or brushing. After application, the adhesion-promoting coating is optionally dried and baked.
次に、ガラス球含有の熱可塑性弗素樹脂を塗布して下塗
り塗膜を得ることができる。最初の塗装の際に既に厚い
塗膜厚を得る為には、被覆するべき基体を通例の粉末塗
装法を用いる場合には、熱可塑性弗素樹脂の融点より約
２０〜８０℃だけ高い温度に予備加熱するのが有利であ
る。Next, a thermoplastic fluororesin containing glass spheres can be applied to obtain an undercoat film. In order to obtain a thick coating already during the first application, the substrate to be coated, when using customary powder coating methods, must be preheated to a temperature of about 20 to 80 °C above the melting point of the thermoplastic fluoropolymers. Heating is advantageous.
塗布する間に既に熱可塑性弗素樹脂の一部が溶融する。During application, some of the thermoplastic fluororesin melts.
完全な溶融は、続く熱処理の際に炉の中で、同様に用い
る熱可塑性弗素樹脂の融点より２０〜８０℃高い温度で
達成する。Complete melting is achieved during the subsequent heat treatment in a furnace at a temperature of 20 DEG to 80 DEG C. above the melting point of the thermoplastic fluororesin also used.
繰り返す塗布および熱処理によって、ガラス球を充填し
ていない同じ熱可塑性弗素樹脂の二倍〜三倍の塗膜厚が
既に達成され、その際に被覆物の流出は生じない。非常
に小さい半径の縁部の所でも充分に厚い塗膜を得ること
ができる。By repeated application and heat treatment, coating thicknesses that are two to three times higher than those of the same thermoplastic fluororesin without glass bulb filling are already achieved, without any runoff of the coating. Sufficiently thick coatings can be obtained even at edges of very small radius.
ガラス球を充填した熱可塑性弗素樹脂塗膜の縁部は、支
持材料より実質的に大きな半径を有しているので、ガラ
ス球を含まない上塗り塗膜を後から塗布する際に前述の
縁部の薄化は生じない。The edges of the thermoplastic fluoropolymer coating filled with glass spheres have a radius substantially larger than the supporting material, so that when a topcoat without glass spheres is subsequently applied, the aforementioned edges No thinning occurs.
ガラス球の充填していない熱可塑性弗素樹脂上塗り塗膜
の塗布は、ガラス球の充填された下塗り塗膜と同様に適
宜に行う。両方の熱可塑性弗素樹脂は実質的に同じ流動
性を有しているので、上塗り塗膜および下塗り塗膜の溶
融は問題なく成功する。それ故に全体の塗膜の得られる
塗膜厚が流出限界を迩かに超過しているにもかかわらず
、下塗り塗膜のガラス球充填の影ツのもとで決して流出
現象は生じない。この場合、勿論、個々の上塗り塗膜そ
のものだけではここで用いる熱可塑性弗素樹脂の流出限
界より下にあることは注目されるべきである。場合によ
ってはこの上塗り塗膜の上に少なくとも一つの別の上塗
り塗膜を塗布することができる。この場合、後続の上塗
り塗膜の熱可塑性弗素樹脂の流動性はその前の上塗り塗
膜の熱可塑性弗素樹脂のそれより高くなければならず、
有利には最初に一部の塗膜（その塗膜の厚さは流出限界
に匹敵する前の上塗り塗膜まで及ばない）を塗布しそし
て塗布後に前の上塗り塗膜と一緒に溶融する。The thermoplastic fluororesin topcoat film without glass bulbs is applied as appropriate in the same manner as the basecoat film with glass bulbs. Since both thermoplastic fluororesins have substantially the same flow properties, melting of the topcoat and basecoat is successful without any problems. Therefore, under the influence of the glass bulb filling of the base coat, no runoff phenomenon occurs, even though the resulting coating thickness of the entire coating significantly exceeds the runoff limit. In this case, it should of course be noted that the individual top coats themselves are below the flow limit of the thermoplastic fluororesin used here. Optionally, at least one further topcoat can be applied over this topcoat. In this case, the fluidity of the thermoplastic fluoropolymer of the subsequent topcoat must be higher than that of the thermoplastic fluoropolymer of the previous topcoat;
Advantageously, first a portion of the coating is applied, the coating thickness of which does not extend up to the previous topcoat, which corresponds to the flow limit, and melts together with the previous topcoat after application.
本発明を以下の実施例によって更に詳細に説明する：
災嵐■
テトラフルオルエチレン、エチレンおよびヘキサフルオ
ルプロピレンより成り、２００℃の融点を有する共重合
体を、３０μｍの平均粒子径を持つ中実ガラス球と一緒
にドラム型混合機中で、被覆物中のガラス球の割合が４
１容量χとなる比で混合する。共重合体の平均粒子径は
９０μｍである。The present invention will be explained in more detail by the following examples: Disaster ■ A copolymer consisting of tetrafluoroethylene, ethylene and hexafluoropropylene and having a melting point of 200°C was mixed into a medium having an average particle size of 30 μm. In a drum-type mixer with real glass bulbs, the proportion of glass bulbs in the coating is 4.
Mix at a ratio of 1 volume χ. The average particle diameter of the copolymer is 90 μm.
二の混合物を静電気粉末スプレー・ガンにて、垂直に配
置した１００ Ｘ ４０ Ｘ ２０ （＋ｓｎ＋）の寸
法の鋼鉄製板に塗布する。この鋼鉄製板は塗布前に２６
０℃に予備加熱する。塗布後に被覆物を２５０℃で溶融
する。その後に四つの別の塗膜を塗布する。The two mixtures are applied with an electrostatic powder spray gun to a vertically placed steel plate measuring 100 x 40 x 20 (+sn+). This steel plate is 26mm thick before application.
Preheat to 0°C. After application, the coating is melted at 250°C. Four separate coats are then applied.
その際それぞれの塗布の後に被覆物を２５０℃で溶融処
理する。このようにして、２５０℃での溶融処理の際に
被覆物を流出することなしに、４ｎｕａの塗膜厚が得ら
れる。After each application, the coating is melt-treated at 250.degree. In this way, a coating thickness of 4 nua is obtained without any runoff of the coating during melt processing at 250°C.
次いで同様にして、ガラス球を添加してない同じ共重合
体粉末より成る別の四つの塗膜を塗布する。Four other coatings of the same copolymer powder without added glass spheres are then applied in the same manner.
塗膜の全体膜厚は６１１１１となり、２５０℃での最後
の溶融の際でも未だ流出傾向を示さない。The total film thickness of the coating amounted to 61,111 mm, and even during the final melting at 250° C. it still showed no tendency to run off.
北較■
垂直に配置した１００ Ｘ ４０ Ｘ ２０ （０１１
１１）の寸法の鋼鉄製板に、上記の実施例で使用した（
ガラス球不含の）熱可塑性弗素樹脂粉末を同様に静電気
粉末スプレー・ガンにて五回塗布しそして２５０℃で溶
融処理する。最後の溶融処理の際に塗膜は既に流出し始
める。鋼鉄製板の上の塗膜の厚さは下方域で２．５ｍｒ
ａだけでありそして上方域で１ 、８ｍｍだけである。Northern comparison ■ 100 x 40 x 20 arranged vertically (011
11) used in the above example on a steel plate with dimensions of (
The thermoplastic fluoropolymer powder (without glass bulbs) was similarly applied five times with an electrostatic powder spray gun and melt processed at 250°C. During the final melting process the coating already begins to run off. The thickness of the coating film on the steel plate is 2.5mr in the lower area.
a and only 1.8 mm in the upper region.
これは、熔融処理の際に塗膜が重力により流出した結果
である。This is the result of the coating flowing out due to gravity during melt processing.
Claims (1)
塗り塗膜および上塗り塗膜を粉末被覆法によって塗布す
ることによる高温安定性表面の被覆方法において、塗装
工程の間の流出を防止する為に下塗り塗膜を形成する熱
可塑性弗素樹脂の流動性を、下塗り塗膜に直径１０〜４
００μｍのガラス球を１５〜６５容量％添加することに
よって低下させることを特徴とする、上記方法。 ２）上塗り塗膜として融点が下塗り塗膜の熱可塑性弗素
樹脂のそれに等しいかまたは最高２０℃まで高い熱可塑
性弗素樹脂を塗布する、請求項１に記載の粉末被覆法に
よる高温安定性表面の被覆方法。 ３）上塗り塗膜として溶融粘度（Ｐａ．ｓ）が下塗り塗
膜の熱可塑性弗素樹脂のそれと同じかまたはこの値の最
高１０倍までである、請求項１に記載の粉末被覆法によ
る高温安定性表面の被覆方法。 ４）下塗り−および上塗り塗膜が、溶融物から加工でき
る同じ熱可塑性弗素樹脂で構成されている、請求項１に
記載の粉末被覆法による高温安定性表面の被覆方法。 ５）下塗り−および上塗り塗膜が実質的に同じ加工温度
のもとで塗布される請求項１〜４の何れか一つに記載の
粉末被覆法による高温安定性表面の被覆方法。 ６）下塗り塗膜を少なくとも二つの部分段階で塗布する
請求項１〜５の何れか一つに記載の粉末被覆法による高
温安定性表面の被覆方法。 ７）上塗り塗膜が少なくとも二つの部分段階で塗布する
請求項１〜６の何れか一つに記載の粉末被覆法による高
温安定性表面の被覆方法。[Scope of Claims] 1) A process for coating high-temperature stable surfaces by applying base coats and top coats of thermoplastic fluoropolymer which can be processed from the melt by a powder coating method, which prevents runoff during the coating process. In order to prevent
The above method, characterized in that the reduction is carried out by adding 15 to 65% by volume of 00 μm glass spheres. 2) Coating a high temperature stable surface by the powder coating method according to claim 1, wherein a thermoplastic fluororesin whose melting point is equal to or up to 20° C. higher than that of the thermoplastic fluororesin of the undercoat is applied as the top coat. Method. 3) High temperature stability by the powder coating method according to claim 1, wherein the melt viscosity (Pa.s) as the top coat is the same as that of the thermoplastic fluororesin of the base coat or up to 10 times this value. How to coat the surface. 4) A process for coating high-temperature-stable surfaces by powder coating according to claim 1, wherein the basecoat and topcoat are composed of the same thermoplastic fluoropolymer which can be processed from the melt. 5) A method for coating high temperature stable surfaces by powder coating according to any one of claims 1 to 4, wherein the basecoat and topcoat coatings are applied under substantially the same processing temperature. 6) A method for coating high temperature stable surfaces by powder coating according to any one of claims 1 to 5, wherein the base coat is applied in at least two partial stages. 7) A method for coating high temperature stable surfaces by powder coating according to any one of claims 1 to 6, wherein the topcoat is applied in at least two partial stages.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883805766 DE3805766A1 (en) | 1988-02-24 | 1988-02-24 | METHOD FOR PRODUCING POWDER COATINGS FROM FLUORTHERMOPLASTICS |
| DE3805766.2 | 1988-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01258771A true JPH01258771A (en) | 1989-10-16 |
Family
ID=6348067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4197689A Pending JPH01258771A (en) | 1988-02-24 | 1989-02-23 | Production of powder coating agent composed of thermoplastic fluorocarbon resin |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0330048A3 (en) |
| JP (1) | JPH01258771A (en) |
| DE (1) | DE3805766A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03181372A (en) * | 1989-12-11 | 1991-08-07 | Sekisui Chem Co Ltd | Method for coating metal body with powder |
| WO2004065504A1 (en) * | 2003-01-10 | 2004-08-05 | Daikin Industries, Ltd. | Powder coating composition, method of forming coating film, and layered product |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3941849A1 (en) * | 1989-12-19 | 1991-06-20 | Hoechst Ag | METHOD FOR POWDER COATING WITH FLUORT THERMOPLASTICS |
| DE4011801A1 (en) * | 1990-04-12 | 1991-10-17 | Messer Griesheim Gmbh | METHOD FOR THERMALLY COATING SURFACES WITH A FLUOROPOLYMER |
| DE19641687A1 (en) * | 1996-10-10 | 1998-04-16 | Agfa Gevaert Ag | Bleach fixing bath for processing exposed colour photographic material |
| DE19941410B4 (en) * | 1999-08-31 | 2011-05-05 | STE Gesellschaft für Dichtungstechnik mbH | Coating and process for its production |
| DE19964627B4 (en) * | 1999-08-31 | 2012-08-02 | STE Gesellschaft für Dichtungstechnik mbH | Coating for sealing substrates, especially for production of cylinder head gaskets, contains thermoplastic fluoropolymer and shows decreasing hardness from the coated surface outwards |
| DE10159394A1 (en) * | 2001-12-04 | 2003-06-12 | Endress & Hauser Gmbh & Co Kg | level meter |
| US9751107B2 (en) | 2012-03-21 | 2017-09-05 | Valspar Sourcing, Inc. | Two-coat single cure powder coating |
| WO2013141915A1 (en) | 2012-03-21 | 2013-09-26 | Valspar Sourcing, Inc. | Two-coat single cure powder coating |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365355A (en) * | 1964-04-29 | 1968-01-23 | Pennsalt Chemicals Corp | Tetrafluoroethylene polymer articles having one readily cementable surface containing glass particles |
-
1988
- 1988-02-24 DE DE19883805766 patent/DE3805766A1/en not_active Withdrawn
-
1989
- 1989-02-14 EP EP19890102470 patent/EP0330048A3/en not_active Withdrawn
- 1989-02-23 JP JP4197689A patent/JPH01258771A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03181372A (en) * | 1989-12-11 | 1991-08-07 | Sekisui Chem Co Ltd | Method for coating metal body with powder |
| WO2004065504A1 (en) * | 2003-01-10 | 2004-08-05 | Daikin Industries, Ltd. | Powder coating composition, method of forming coating film, and layered product |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0330048A2 (en) | 1989-08-30 |
| EP0330048A3 (en) | 1991-03-06 |
| DE3805766A1 (en) | 1989-09-07 |
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