WO1994009915A1 - Verfahren zur herstellung einer mehrschichtigen lackierung - Google Patents
Verfahren zur herstellung einer mehrschichtigen lackierung Download PDFInfo
- Publication number
- WO1994009915A1 WO1994009915A1 PCT/EP1993/002964 EP9302964W WO9409915A1 WO 1994009915 A1 WO1994009915 A1 WO 1994009915A1 EP 9302964 W EP9302964 W EP 9302964W WO 9409915 A1 WO9409915 A1 WO 9409915A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- powder
- less
- grain size
- particles
- 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.)
- Ceased
Links
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
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
- B05D7/532—Base coat plus clear coat type the two layers being cured or baked together, i.e. wet on wet
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/031—Powdery paints characterised by particle size or shape
-
- 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)
Definitions
- the invention relates to a method for producing a multilayer coating on a substrate surface, in which
- the invention also relates to powder clearcoats suitable for this process.
- the method described above is known. It is used primarily for the production of automotive top coats, in particular for the production of metallic effect coatings (cf. for example DE-A-38 14 853, US-A-3,953,644, EP-A-299 420 (in particular page 5, line 22 / 23), US-A-4,402,983, EP-A-45 040 and GB-A-20 12 191). gene, in particular for the production of metallic effect paints (see, for example, DE-A-38 14 853, US-A-3,953,644, EP-A-299 420 (in particular page 5, line 22/23), US-A-4,402,983 , EP-A-45 040 and GB-A-20 12 191).
- the task on which the present invention is based consists in the provision of a method of the type described above with which coatings are obtainable which are improved over the coatings of the prior art.
- the paintwork should be improved in particular with regard to the gloss and flow of the baked clear coat.
- the ten logarithm of the quotient of the largest and the smallest grain size is less than or equal to 0.25 and c) at least 98% by weight of the powder clearcoat particles have a grain size which is less than 100 ⁇ m.
- step (1) of the process in principle all pigmented basecoats suitable for the production of multi-layer coatings can be used.
- Such basecoats are well known to those skilled in the art. Both water-dilutable basecoats and basecoats based on organic solvents can be used.
- Suitable basecoats are described, for example, in US-A-3,639,147, DE-A-33 33 072, DE-A-38 14 853, GB-A-2 012 191, US-A-3,953,644, EP-A-260 447, DE-A-39 03 804, EP-A-320 552, DE-A-36 28 124, US-A-4,719,132, EP-A-297 576, EP-A-69 936, EP-A-89 497, EP-A-195 931, EP-A-228 003, EP-A-38 127 and DE-A-28 18 100.
- stage (2) of the process the solvent or water is removed from the basecoat applied in stage (1) in an evaporation phase.
- the basecoat can also be baked.
- this is disadvantageous for economic reasons, because then two instead of one baking process are required to produce the multi-layer coating.
- the application of the powder clearcoat carried out in stage (3) is preferably electrostatic. In principle, it is possible to use all powder clearcoats suitable for the production of multi-layer coatings. Such powder clearcoats are well known. Suitable powder clearcoats are described, for example, in DE-A-38 14 853, GB-A-20 12 191, US-A-3,953,644, DE-A-23 03 650, EP-A-299 420, US-A-4,402,983 and EP-A-45 040. It is essential to the invention that the powder clearcoat used in stage (3) has a grain size distribution in which
- 60% by weight of the powder clearcoat particles is the ten logarithm of the quotient from the largest and the smallest grain size less than or equal to 0.25, preferably less than or equal to 0.20, particularly preferably less than or equal to 0.15 and
- the average grain size of the powder clear coat particles mentioned under b) (that is, the powder clear coat particles for which the condition applies that the tens logarithm of the quotient of the largest and the smallest grain size is less than or equal to 0.25, preferably smaller or equal to 0.20, particularly preferably less than or equal to 0.15) d + 0.2 d, preferably d + 0.1 d, where d stands for the mean layer thickness of the baked powder clear lacquer layer to be produced with the powder clear lacquer and the middle one
- Grain size is determined with a laser diffraction spectrometer.
- the powder clearcoats can be produced using commercially available grinding plants, if necessary with the aid of Take sieving machines and / or (cyclone) classifiers to be adjusted to the particle size distribution according to the invention.
- Suitable machines are known to the person skilled in the art and are commercially available, for example, from: Alpine AG, Augsburg (FRG) and Hosokawa Micropul, Cologne (FRG).
- the invention is explained in more detail in the following examples. All parts and percentages are by weight unless expressly stated otherwise.
- a commercially available water-thinnable basecoat pigmented with aluminum flakes and coated with aluminum flakes, is applied to phosphated steel sheets coated with a commercially available electrodeposition coating and a commercially available filler in such a way that a dry film thickness of 12 to 15 ⁇ m is obtained.
- the applied basecoat is dried for 10 minutes at room temperature and for 10 minutes at 80 ° C.
- the powder clearcoats produced according to items 1 and 2 are electrostatically over-coated in such a way that a film thickness of 40 to 50 ⁇ m is obtained.
- the basecoat and powder clearcoat are baked for 20 minutes at 180 ° C (object temperature).
- FIG. 1 In the profilometric measurement of the clear lacquer surfaces, a surface roughness R a of 0.36 ⁇ m with the standard deviation of 0.14 ⁇ m is measured in the coating produced with the powder clear lacquer according to item 1, while in the case of the coating produced with the powder clear lacquer according to item 2 Paint a rough depth of only 0.14 ⁇ m with a standard deviation of only 0.01 ⁇ m is measured.
- the improved surface smoothness achieved with the powder clearcoat according to the invention is also visually clearly visible.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR9307356A BR9307356A (pt) | 1992-11-03 | 1993-10-26 | Processo para preparação de um laqueamento com múltiplas camadas |
| EP93924052A EP0666779B2 (de) | 1992-11-03 | 1993-10-26 | Verfahren zur herstellung einer mehrschichtigen lackierung |
| DE59303041T DE59303041D1 (de) | 1992-11-03 | 1993-10-26 | Pulverklarlack und verfahren zur herstellung einer mehrschichtigen lackierung |
| US08/428,166 US5855964A (en) | 1992-11-03 | 1993-10-29 | Powder clearcoat and process for the production of a multicoat finish |
| GR960402376T GR3021023T3 (en) | 1992-11-03 | 1996-09-12 | Process for producing a multilayer coat of enamel. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4237032A DE4237032A1 (de) | 1992-11-03 | 1992-11-03 | Verfahren zur Herstellung einer mehrschichtigen Lackierung |
| DEP4237032.9 | 1992-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994009915A1 true WO1994009915A1 (de) | 1994-05-11 |
Family
ID=6471955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1993/002964 Ceased WO1994009915A1 (de) | 1992-11-03 | 1993-10-26 | Verfahren zur herstellung einer mehrschichtigen lackierung |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5855964A (de) |
| EP (1) | EP0666779B2 (de) |
| JP (1) | JP2667295B2 (de) |
| AT (1) | ATE139466T1 (de) |
| BR (1) | BR9307356A (de) |
| DE (2) | DE4237032A1 (de) |
| DK (1) | DK0666779T3 (de) |
| ES (1) | ES2091046T5 (de) |
| GR (1) | GR3021023T3 (de) |
| WO (1) | WO1994009915A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2285627A (en) * | 1994-01-14 | 1995-07-19 | Sandoz Ltd | Powder coatings |
| US6337139B1 (en) * | 1997-07-18 | 2002-01-08 | Basf Coatings Ag | Method for producing multilayer coatings |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004027650A1 (de) | 2004-06-05 | 2006-01-05 | Basf Coatings Ag | Verfahren zum Beschichten elektrisch leitfähiger Substrate |
| US20090155462A1 (en) * | 2007-12-18 | 2009-06-18 | Carmen Flosbach | Thermal curable polyester powder coating composition |
| DE102008017356A1 (de) | 2008-04-04 | 2009-10-15 | Airbus Deutschland Gmbh | Nachleuchtende Beschichtung für Innenkabinen |
| US8153733B2 (en) | 2008-12-29 | 2012-04-10 | Basf Coatings Gmbh | Electrocoat compositions with amine ligand |
| KR101712217B1 (ko) | 2008-12-29 | 2017-03-03 | 바스프 코팅스 게엠베하 | 전기코트 조성물 및 포스페이트 사전처리를 대체하는 방법 |
| US20100163423A1 (en) | 2008-12-29 | 2010-07-01 | Basf Corporation | Electrocoat composition and process replacing phosphate pretreatment |
| WO2012115691A1 (en) | 2011-02-22 | 2012-08-30 | Basf Coatings Gmbh | Electrocoat coating with low gloss |
| MX376612B (es) | 2012-11-09 | 2025-03-07 | Basf Coatings Gmbh | Metodo para mejorar el curado del revestimiento para articulo revestido en composicion de revestimiento para electrorrevestimiento, contaminada con fosfato, y composicion de revestimiento para electrorrevestimiento. |
| CN107406662B (zh) * | 2015-06-29 | 2021-03-30 | 东丽株式会社 | 聚酯树脂粉粒体混合物 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057607A (en) * | 1975-12-19 | 1977-11-08 | Celanese Corporation | Process for preparing shear degradable particle-containing resin powders |
| GB2012191A (en) * | 1977-09-29 | 1979-07-25 | Kodak Ltd | Coating process utilising cellulose esters such as cellulose acetate butyrate |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4027366A (en) * | 1973-08-02 | 1977-06-07 | Beatrice Foods Co. | Multilayer coated substrate |
| US3953644A (en) * | 1974-12-20 | 1976-04-27 | Ford Motor Company | Powa--method for coating and product |
| US4027066A (en) * | 1975-12-01 | 1977-05-31 | E. I. Du Pont De Nemours And Company | Thermosetting powder coating composition of an acrylic polymer, dodecanedioic acid, cellulose acetate butyrate and a cross-linking agent |
| US4346144A (en) † | 1980-07-21 | 1982-08-24 | E. I. Du Pont De Nemours And Company | Powder coating composition for automotive topcoat |
| US4689241A (en) * | 1986-02-14 | 1987-08-25 | Richart Douglas S | Method for powder coating with electrostatic fluidized bed |
| DE3844457A1 (de) * | 1988-12-31 | 1990-07-12 | Hoechst Ag | Feinkoerniges polyetherketonpulver, verfahren zu dessen herstellung und dessen verwendung |
| DE4013063C1 (de) * | 1990-04-24 | 1992-01-02 | Metri Airfluid Ag, Altstaetten, Ch | |
| GB9014646D0 (en) † | 1990-07-02 | 1990-08-22 | Courtaulds Coatings Holdings | Coating compositions |
| DE4032391A1 (de) † | 1990-10-12 | 1992-04-16 | Hoechst Ag | Verfahren zur bildung von ueberzuegen |
| DE4112688A1 (de) † | 1991-04-18 | 1992-10-22 | Hoechst Ag | Pulverfoermige ueberzugsmittel |
| US5206108A (en) * | 1991-12-23 | 1993-04-27 | Xerox Corporation | Method of producing a high solids replenishable liquid developer containing a friable toner resin |
| US5552191A (en) * | 1992-02-14 | 1996-09-03 | Morton International, Inc. | Triboelectric coating powder and process |
-
1992
- 1992-11-03 DE DE4237032A patent/DE4237032A1/de not_active Withdrawn
-
1993
- 1993-10-26 AT AT93924052T patent/ATE139466T1/de not_active IP Right Cessation
- 1993-10-26 JP JP6510672A patent/JP2667295B2/ja not_active Expired - Fee Related
- 1993-10-26 EP EP93924052A patent/EP0666779B2/de not_active Expired - Lifetime
- 1993-10-26 WO PCT/EP1993/002964 patent/WO1994009915A1/de not_active Ceased
- 1993-10-26 DK DK93924052.9T patent/DK0666779T3/da active
- 1993-10-26 BR BR9307356A patent/BR9307356A/pt not_active IP Right Cessation
- 1993-10-26 DE DE59303041T patent/DE59303041D1/de not_active Expired - Fee Related
- 1993-10-26 ES ES93924052T patent/ES2091046T5/es not_active Expired - Lifetime
- 1993-10-29 US US08/428,166 patent/US5855964A/en not_active Expired - Fee Related
-
1996
- 1996-09-12 GR GR960402376T patent/GR3021023T3/el unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057607A (en) * | 1975-12-19 | 1977-11-08 | Celanese Corporation | Process for preparing shear degradable particle-containing resin powders |
| GB2012191A (en) * | 1977-09-29 | 1979-07-25 | Kodak Ltd | Coating process utilising cellulose esters such as cellulose acetate butyrate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2285627A (en) * | 1994-01-14 | 1995-07-19 | Sandoz Ltd | Powder coatings |
| US5569539A (en) * | 1994-01-14 | 1996-10-29 | Sandoz Ltd. | Powder coating compositions |
| GB2285627B (en) * | 1994-01-14 | 1997-04-23 | Sandoz Ltd | Powder coating compositions |
| US6337139B1 (en) * | 1997-07-18 | 2002-01-08 | Basf Coatings Ag | Method for producing multilayer coatings |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9307356A (pt) | 1999-06-01 |
| DE4237032A1 (de) | 1994-05-05 |
| DK0666779T3 (da) | 1996-10-14 |
| EP0666779B2 (de) | 2004-09-29 |
| EP0666779B1 (de) | 1996-06-19 |
| ES2091046T3 (es) | 1996-10-16 |
| EP0666779A1 (de) | 1995-08-16 |
| JPH07509403A (ja) | 1995-10-19 |
| JP2667295B2 (ja) | 1997-10-27 |
| DE59303041D1 (de) | 1996-07-25 |
| US5855964A (en) | 1999-01-05 |
| GR3021023T3 (en) | 1996-12-31 |
| ES2091046T5 (es) | 2005-04-16 |
| ATE139466T1 (de) | 1996-07-15 |
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