EP0321470A1 - Wasserverdünnbare beschichtungszusammensetzungen - Google Patents

Wasserverdünnbare beschichtungszusammensetzungen

Info

Publication number
EP0321470A1
EP0321470A1 EP87905201A EP87905201A EP0321470A1 EP 0321470 A1 EP0321470 A1 EP 0321470A1 EP 87905201 A EP87905201 A EP 87905201A EP 87905201 A EP87905201 A EP 87905201A EP 0321470 A1 EP0321470 A1 EP 0321470A1
Authority
EP
European Patent Office
Prior art keywords
water
coating compositions
stands
lower alkyl
pigment
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
Application number
EP87905201A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roland Treutlein
Bodo Müller
Peter Mayenfels
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Farben und Fasern AG
Original Assignee
BASF Lacke und Farben AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF Lacke und Farben AG filed Critical BASF Lacke und Farben AG
Publication of EP0321470A1 publication Critical patent/EP0321470A1/de
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C09D5/38—Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/62—Metallic pigments or fillers
    • C09C1/64—Aluminium
    • C09C1/644—Aluminium treated with organic compounds, e.g. polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/62—Metallic pigments or fillers
    • C09C1/64—Aluminium
    • C09C1/648—Aluminium treated with inorganic and organic, e.g. polymeric, compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other

Definitions

  • the invention relates to water Be Mrsungszusa - 10 men experience containing binder, aluminum pigment and an aqueous diluent.
  • Water-dilutable coating compositions which contain binders, aluminum pigment and an aqueous diluent are known and in particular are intended
  • the object of the present invention is to provide water-dilutable coating compositions of the type mentioned at the outset which do not have the disadvantages of the prior art outlined above.
  • Aluminum pigment contain a pigment which has been obtained by a lubricant-coated aluminum pigment in an aqueous passivation solution, the chromic acid and a water-soluble glycol ether of the general formula R 1 - (- 0-CHR2-CH _-) - 0H (R1 stands for ⁇ lower
  • R represents either an H atom or a lower alkyl radical, preferably a -CH 3 group, n represents a number from 1 to 5) and / or a water-soluble glycol of the general formula HO- (CHR - CH - 0-) H (R either represents an H atom or a lower one
  • Alkyl radical preferably a —CH group, n stands for a number from 1 to 5
  • n stands for a number from 1 to 5
  • the water-thinnable coating compositions according to the invention can in principle contain all binders suitable for water-thinnable coating compositions.
  • Water-dilutable polyester, polyacrylate, polyurethane or aminoplast resins may be mentioned as examples.
  • water-thinnable coating compositions the binders of which at least partially consist of a water-thinnable polyurethane resin.
  • the water-dilutable coating compositions according to the invention contain aluminum pigments which have been obtained by adding a lubricant-coated aluminum pigment in an aqueous passivation solution, the chromic acid and a water-soluble glycol ether of the general type
  • R represents either an H atom or a lower alkyl radical, preferably a -CH -, - group, n represents a number from 1 to 5) and / or a water-soluble glycol of the general formula H0- (CHR -CH _-_. • -0-) IIH
  • R stands either for an H atom or for a lower alkyl radical, preferably for a -CH -, - group, n stands for a number from 1 to 5
  • pigments Surprisingly useful pigments are obtained only when the occupied to be passivated aluminum pigment nor with the "necessary for the production of the pigment lubricant.
  • To th pigments with the desired Eigenschaf ⁇ to obtain pigments must be used that a certain minimum amount of lubricant
  • the lubricant content is preferably adjusted in the course of the manufacturing process of the aluminum pigments. The minimum content required is dependent both on the nature of the lubricant and on the type of aluminum pigments used and can be quickly determined by the person skilled in the art with the help of less orienting experiments.
  • Aluminum pigments coated with fatty amines as lubricants lead to passivated pigments which have very particularly advantageous properties.
  • Fatty amines are mixtures of long-chain, predominantly primary alkylamines which have been obtained, for example, from fatty acids via the associated nitriles by reduction.
  • Generally known and customary aluminum pigments which consist of aluminum or aluminum alloys, preferably of pure aluminum, can be used as lubricant-coated aluminum pigments. Flake-like aluminum pigments are preferably used.
  • the aluminum pigments can be used in the form of the commercially available pastes without further pretreatment.
  • the passivation of the lubricant-coated aluminum pigments is carried out at least 50 ° C., preferably 60 to 90 ° C., particularly preferably about 80 ° C., in an aqueous solution.
  • R represents either an H atom or a lower alkyl radical, preferably a -CH 3 group, n represents a number from 1 to 5) and / or a water-soluble
  • Alkyl radical preferably for a -CH 3 group, n stands for a number from 1 to 5).
  • the aqueous solution can also contain other additives which have a positive effect on the chromating process, e.g. Fluoride or phosphates.
  • the passivation solution contains chromic acid and n-butylglycol (( ⁇ - ⁇ D j -O- Q ⁇ -C - ⁇ - OH.
  • the passivation solution according to the invention generally contains at least 1.5, preferably 1.5 to 4 ° C., particularly preferably 2.0% by weight of chromic acid and 3 to 30, preferably 7 to 15, particularly preferably 10% by weight of water-soluble glycol ether and / or water soluble glycol.
  • the passivation is preferably carried out in the freshly prepared passivation solution and is usually complete after 10 to 30 minutes.
  • the passivated pigment obtained is separated from the passivation solution and washed out thoroughly with water.
  • the passivated aluminum pigment obtained in this way can then be incorporated into water-dilutable coating compositions by generally known methods.
  • the water-dilutable coating compositions according to the invention contain an aqueous diluent, which is water, which may also contain organic solvents.
  • the coating compositions according to the invention can also contain other generally known additives, such as e.g. non-metallic pigments, rheology aids and flow aids.
  • the water-dilutable coating compositions according to the invention are preferably used as base coating compositions for the production of "basecoat / clearcoat” metal effect coatings. They show excellent stability against water vapor development and provide metallic effect coatings which are comparable in their optical (flop, color tone, etc.) and technological (insensitivity to moisture, resistance to condensation, intermediate adhesion ...) with coatings which are under The use of conventional (ie exclusively organic solvents containing diluents) base coating compositions have been produced.
  • the applicability of the coating compositions according to the invention is not limited to automotive painting. limits.
  • Other substrates, which may consist of pretreated metal, wood, plastic or the like, can also be coated using the single-layer or multi-layer method.
  • the invention also relates to a process for the production of aluminum pigments which can be used in water-dilutable coating compositions, which is characterized in that a lubricant-coated aluminum pigment in an aqueous passivation solution, the chromic acid and a water-soluble glycol ether
  • R - (- 0-CHR 2 2 -CH 2) n-OH R 1 represents a lower alkyl radical, R represents either a hydrogen atom or a lower alkyl radical, preferably a CH 3 - group, n stands for a number from 1 to 5) and / or a water-soluble glycol of the general formula
  • the inventive method is carried out by the aluminum pigment to be passivated without further pretreatment, i.e. in particular without removing the lubricant required in the pigment production process, in which the passivation solution is passivated at at least 50 ° C., preferably 60 to 90 ° C., particularly preferably about 80 ° C.
  • the presence of the lubricant is essential for the method to be carried out successfully.
  • Pigments with very particularly good properties are obtained if aluminum pigments are used which have been produced using fatty amines as lubricants.
  • the aluminum pigments produced by the process according to the invention are outstandingly suitable for use in water-thinnable coating compositions (cf. the explanations above).
  • the flaky aluminum pigment to be passivated produced using fatty amines as lubricants, is in paste form (solids content about 65% by weight, proportion of aliphatic or aromatic solvents about 35% by weight) in a stainless steel or plastic container submitted and mixed with 2 to 2.5 times the amount of passivation solution described above.
  • the batch is kept at 80 ° C. and stirred vigorously for about 15 to 25 minutes.
  • the passivated aluminum pigment is allowed to settle, the supernatant solution is decanted and the passivated pigment is rinsed with process water until the supernatant solution no longer has a yellow tinge.
  • Embodiments of the European patent application EP 89 497 incorporated aqueous coating compositions incorporated.
  • Storage-stable coating compositions were obtained which, as described in the experimental part of European patent application EP 89 497, were processed to give two-layer metallic effect coatings.
  • the two-layer metallic effect coatings obtained showed excellent optical and technological properties.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
EP87905201A 1986-08-27 1987-07-29 Wasserverdünnbare beschichtungszusammensetzungen Pending EP0321470A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3629159 1986-08-27
DE3629159 1986-08-27
DE3636183 1986-10-24
DE19863636183 DE3636183A1 (de) 1986-08-27 1986-10-24 Wasserverduennbare beschichtungszusammensetzungen

Publications (1)

Publication Number Publication Date
EP0321470A1 true EP0321470A1 (de) 1989-06-28

Family

ID=25846929

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87905201A Pending EP0321470A1 (de) 1986-08-27 1987-07-29 Wasserverdünnbare beschichtungszusammensetzungen
EP87110957A Expired - Lifetime EP0259592B1 (de) 1986-08-27 1987-07-29 Wasserverdünnbare Beschichtungszusammensetzungen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP87110957A Expired - Lifetime EP0259592B1 (de) 1986-08-27 1987-07-29 Wasserverdünnbare Beschichtungszusammensetzungen

Country Status (9)

Country Link
US (1) US5028639A (enExample)
EP (2) EP0321470A1 (enExample)
JP (1) JPH01501631A (enExample)
AU (1) AU608774B2 (enExample)
BR (1) BR8707799A (enExample)
CA (1) CA1300819C (enExample)
DE (2) DE3636183A1 (enExample)
ES (1) ES2019605B3 (enExample)
WO (1) WO1988001637A1 (enExample)

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Publication number Publication date
EP0259592B1 (de) 1990-11-14
WO1988001637A1 (fr) 1988-03-10
AU7809887A (en) 1988-03-24
EP0259592A1 (de) 1988-03-16
DE3766196D1 (de) 1990-12-20
CA1300819C (en) 1992-05-19
DE3636183A1 (de) 1988-03-03
BR8707799A (pt) 1989-08-15
JPH0154386B2 (enExample) 1989-11-17
ES2019605B3 (es) 1991-07-01
US5028639A (en) 1991-07-02
JPH01501631A (ja) 1989-06-08
AU608774B2 (en) 1991-04-18

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