GB2250512A - Composition for cathodic electrodeposition - Google Patents
Composition for cathodic electrodeposition Download PDFInfo
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- GB2250512A GB2250512A GB9026629A GB9026629A GB2250512A GB 2250512 A GB2250512 A GB 2250512A GB 9026629 A GB9026629 A GB 9026629A GB 9026629 A GB9026629 A GB 9026629A GB 2250512 A GB2250512 A GB 2250512A
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- composition
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- acetate
- formate
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- 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
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4488—Cathodic paints
- C09D5/4492—Cathodic paints containing special additives, e.g. grinding agents
-
- 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
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
- C09D5/443—Polyepoxides
- C09D5/4434—Polyepoxides characterised by the nature of the epoxy binder
- C09D5/4442—Binder characterised by functional groups
- C09D5/4449—Heterocyclic groups, e.g. oxazolidine
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
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- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
A composition for cathodic electrodeposition, which is useful, for example, in car manufacture or machine-building for priming the surfaces of parts, incorporates an epoxy-rubber adduct with imidazoline groups modified with semiblocked toluene diisocyanate and/or an aminoformaldehyde resin, a pigment, a filler, a neutralization agent, lead formate or acetate an organic solvent and water at the following proportions of the components, per cent by weight: adduct 6.20 - 21.30 pigment 0.18 - 5.10 filler 0.48 - 2.20 neutralization agent 0.13 - 0.57 lead acetate or formate 0.12 - 0.84 organic solvent 3.30 - 13.30 water the balance.
Description
COD.TOSITIOlm FOR CATHODIC ELECTRODEPOSIgION The present invention relates to the pain-and varnish industry and, more particularly, it relates to a composition for a cathodic electrodeposition and can be useful, for example, in car manufacture and machine -building, for priming of the surface of parts and components.
Renown in the art is a composition for a cathodic electrodeposition containing an epoxyamine adduct modified with isocyanate, a pigment, a filler, a neutralization agent, an organic solvent and water (FRG, BASF,
Cathodip FT 85-9480, January, 1982, pp. 1-2).
The salt-resistance of the coatings obtained from this composition characterizing the corrosion resistance of a coating is 480 hours for a non-phosphatized steel and 720 hours for a phosphatized steel in a mist of a 5% aqueous solution of NaCl.
The tensile strength of these coatings is equal to 4 mm.
Also known in the art is a composition for a catho dic electfodeposition comprising a modified epoxyrubber
dduct, a pigment, a filler, a neutralization agent; an
rganic solvent and water (US, A, 4253930).
The adduct incorporated in this composition is modified with semiblocked toluylene diisocyanate.
Pigment coatings of a thickness of 18-20 m depo- sited with the use of this composition onto a non -phosphatized steel have the salt resistance of 360 hours, when onto a phosphatized steel - 800 hours.
The impact resistance of these coatings is 50 kg.cm, while their Erikssen tensile strength is 6.4 mm.
The method of a cathodic electrodeposition of primer coatings is now widely employed, for example, on conveyor lines of car-manufacture plants,
In addition' to good mechanical-strength and corrosion-protective properties it is required that primer coatings have uniformity of thickness, in hidden cross -sections and a dispersing power of a composition would make it possible to apply a uniform coating to a relatively high depth of a hidden cross-section.
Furthermore, a coating should retain its mechanical-strength and corrosion-protective properties upon violation of temperature and time conditions frequently occurring' during its drying, e.g. in cases of conveyor stoppages.
It is also necessary that primer coatings exhibit cohesion to the subsequent layers applied over them which parameter is characterized by peeling of the coating when tested on a cone.
It is the main object of the present invention to improve salt-resistance and tensile strength of a primer coating applied from a composition, while, retaining a high impact strength0
It is also an object of the present invention to provide a composition for a cathodic electrodeposition which would have a high dispersing power.
It is another object of the present invention to provide a composition which would make it possible to produce therefrom coatings with a uniform thickness in hidden cross-sections.
Furthermore, it is still another object of the present invention to provide a composition which would make it possible to produced coatings therefrom-which would retain their mechanical-strength and corrosion -protective properties upon violation of temperature and time conditions during their drying.
These objects are accomplished by that the composition for a cathodic electrodeposition according to the present invention comprising a modified epoxyrubber adduct, a pigment, a filler, a neutralization agent, an organic solvent and water, according to the present invention incorporates an epoxyrubber adduct with imidazoline groups modified with semiblocked toluylene diisocyanate and/or with an aminoformaldehyde resin and additionally incorporates lead acetate or fonnate at the following properties of the components, per cent by mass:
adduct 6.20 - 21.30
pigment 0.18 - 5.10
filler 0.48 - 2.20
neutralization agent 0.13 - 0.57
lead acetate or formate 0.12 - 0.84
organic solvent 3.30 - 13.30
water the balance.
It is advisable that, in order to increase the dispersing powder, as well as to improve uniformity of thickness of the resulting primer coating in hidden cross-sections and tD enhance its cohesion to the coatings applied thereon, the composition also contain an oligomeric azo dye of the general formula:
where in:
R1 = -OCH3 -N (C2E5)2' ND2; R2 = a residue of fatty acids of tall oil or a residue
or resin acids, n = 1,2 and manganese acetate Dr formate at the following propertions of the components, per cent by mass::
epoxyrubber adduct 6.20 - 21.20
pigment 0.18 - 3.40
filler 0.48 - 1.70
neutralization agent 0.13 - 0.47
lead acetate or formate 0.20 - 0.80
oligomeric azo dye 0.10 - 0.40
manganese acetate or formate 0.005 - 0.02 organic solvent 3.30 - 12.20
water the balance.
As a film-forming agent use is made of an epoxyrubber adduct with imidazoline groups modified with semiblocked toluylene diisocyanate and/or an aminoformaldehyde resin.
As the pigment use is made of titania, lead silico -chromate, carbon black.
As the filler use is made of microtalcum with a particle size of 2 - 5jun and/or china clay.
As the neutralization agent use is made of formic acid or acetic acid.
As the organic solvent use is made of ethylglycol acetate, diacetone alcohol, isopropanol, toluene, xylene, cyclohexanone, ethylcellosolve and the like.
The oligomeric azo dye incorporated in the composition according to the present invention has a molecular mass of from 800 to 1,200.
The composition for a cathodic electrodeposition according to the present invention has a high dispersing power, ensures a uniformity of distribution of the coating layer thickness in hidden cross-sections. A primer coating produced from this composition has a high resistance to over-drying and a good cohesion to the layers applied thereon.
The composition for a cathodic electrodeposition according to the present invention makes it possible to obtain coatings on both phosphatized and non-phosphatized steels and non-ferrous metal which coatings exhibit an improved salt-resistance and a higher tensile strength, while retaining high impact strength characteristics.
Prom the composition of the present invention is to possible to obtain coatings with a thickness of up to 5 - 8 Jim having a silt resistance superior to that of the coatings produced by the known process (US, A, 4253930) at the same thickness thereof.
Upon incorporation of an epoxyrubber adduct with imidazoline groups modified with semiblocked toluylene diisocyanate and/or an aminorormaldehyde resin into the composition in accordance with the present invention in an amount of less than 6.20% by mass the adhesion of the resulting coating obtained from this composition is lowered.
Upon incorporation into the composition according to the present invention in an amount over 21.305'0 by mass the dispersing power of the composition is also lo weed.
The incorporation of lead acetate or fom ate in an amount of less than 0.12% by mass results in an impaired salt-resistance of the primer coating produced from the composition according to the present invention
An increase of the amount of lead acetate or formate in the composition of the present invention above 0.84% by mass causes deterioration of mechanical properties of the coating produced from the composition according to the present invention.
A decrease of the amount of the oligomeric azo dye in the composition according to the present invention results in a non-uniformity of distribution of the coating thickness, in particular, in hidden cross-sections of the coated article.
An increase of the amount of the above-mentioned oligomeric azo dye in the composition according to the present invention results in a reduced dispersing power of its solution.
At a decreased amount of manganese acetate or formate below 0.005% by mass mechanical properties of the coating produced from the compositzon according to the present invention are lowered, vrhile at an increased content above 0.02% by mass the stability of the composition solution is broken and coagulation of the solution can occur.
The composition according to the present invention is prepared in the following manner.
Into a dissolver a portion of an epoxyrubber adduct with imidazoline groups modified with semiblocked toluylene dilsocyanate and/or an aminoformeldehyde resin neutralized with acetic acid or formic acid and an organic solvent are charged, the mass is stirred, whereafter added thereto are pigments, fillers, lead acetate or formate. It is advisable to introduce the oligomeric azo dye and manganese acetate or formate into the composition at this stage as well.The resulting mixture is dispersed, added with the remaining portion of the above-mentioned epoxrubber adduct and intermixed till a full homogenization0 The mixture is diluted with water to a concentration of 8 to 25, whereafter the thus-prepared composition according to the present invention is tested for its dispersing power. From the thus-preparedcDmpDsition according to the present invention having pF value from 5.5 to 7.0 a primer coating is deposited by a cathodic electrodeposition at a voltage of 140-400 V for 60-180 seconds to a thickness of 1820fm onto a phosphatized or non-phosphatized steel or onto non-ferrous metals.
Furthermore, the composition according to the present invention can be applied to the above-mentioned substrates by spraying. The resulting coating is dried for 30 minutes at the temperature of 180C, whereafter its mechanical-strength and corrosion-protecting properties are tested under usual conditions, as well as upon vio lation of both temperature and time conditions of the drying process.
Also determined is the uniformity of distribution of the resulting coating thickness depending on the distance from the anode.
The thickness, mechanical-strength and cohesion properties of complex coatings obtained on the basis of a primer coating produced from. the composition according to the present invention are also tested.
Por a better understanding of the present invention, aome specific examples are given hereinbelow by way of illustration.
ExamPle 1
A composition is prepared for a cathodic electrodeposition from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked to
luylene diisocyanate 6.20
titanium dioxide 1.10
lead silicochromate 0.20
carbon black 0.037
filler - microtalcum 0.48
neutralizing agent - formic acid 0.18
lead acetate 0.12
organic solvent - ethylglycol acetate 4.00
water the balance.
This compositjon is produced in the following
manner.
Into a dissolver 20 g of an epoxyrubber adduct
with imidazoline groups modified with semiblocked toluy
lene diisocyanate are charged with the dry solids resi5 due of 65% neutralized with formic acid, 5.1 g of ethyl glycdl-acetate and intermixed. Then 8.0 g of titanium
dioxide, 2.5 g of lead silicochromate, 0.3 g of carbon
black, -4e7 g of microtalcum," 1 g of lead acetate are
added and the whole mass is again intermixed. The re
sulting mixture is dispersed, added with 58.3 g of the
adduct also neutralized with formic acid and the mixtu
re is homogenized till a complete uniformity. The thus
-produced mass is diluted with water to the concentra
tion of 8% by weight to give the composition according
to the present invention which is then tested for its
dispersing power.From the resulting composition with a pH of 5 - 8 a coating with a thickness of 18-20 X is applied by a cathodic electrodeposition at the voltage
of 240 V for 120 second onto a phosphatized steel. The
coating is dried for 30 minutes at the temperature of
1800C and tested for its salt-resistance and mechanical
-strength properties. Furthermore, "the uniformity of
distribution of the coating thickness is determined
depending on the distance from the anode. The results
of the tests are shown in Tables 1 and 2-hereinbelow.
Example 2
Prepared is a composition for a cathodic electro deposition which consists of the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with an aminofor
maldehyde resin 6.82
pigment - carbon black 0.18'
filler - china 'clay 0.72
neutralization agent - formic acid 0.13 lead acetate 0.27
organic solvent - ethylglycol acetate 3.30
water the balance.
The procedure of preparation and testing of the obtained composition according to the present invention is effected in a manner similar to that described in the foregoing Example 1, except that into the dSwolver there are charged 3.5 g of ethylglycol acetate, 1.5 g of carbon black, 5.8 g of china clay, 2.16 g of lead acetate. After dispergation the resulting mixture is added with 65.3 g of the adduct.
The results of the tests are shown in Tables 1 and 2 hereinbelow.
Example 3
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semïblocked to
luylene diisocyanate and an urea
formaldehyde resin 19.2
titanium dioxide 3.00 pigment lead silicochromate 1.00 carbon black 1.10 filler - mkcrotalcum 1.80
neutralization agent - acetic acid 0.57 lead formate 0.38 organic solvent - ethylglycol acetate 12.20 diacetone alcohol 0.20 water the balance.
The procedure of preparation and testing of the composition according to the present invention is repeated as described in Example 1 hereinbefore, except that charged are 28 g of the addict, 8.5 g of titanium dioxide, 2 g of lead silicochromate and 0.32 g of carbon black, 4.7 g of microtalcum, 1 g of lead formate, 4.9 g efethylglycol acetate, 0.2 g of diacetone alcohol; to produce a coating, the obtained composition is diluted with water to 250. The results of the tests are known in Tables 1 and 2 hereinbelow.
Example 4
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct vrith imidazoline
groups modified with semiblocked to
luylene diisocyanate 21.30
pigment - carbon black 0.58
filler - china clay 2.20 neutralization agent - formic acid 0.49
lead acetate 0.84
organic solvent - ethylglycol acetate 13.00
ethylcellosolve 0.30
water the balance.
The procedure of preparation and testing of the composition according to the present invention is effected in a manner similar to that described in Example 2 hereinbefore, but use is made of a mixture of 3.1 g of ethylglycolacetate and 0.4 g of ethylcellosolve and the mixture resulting from the homogenization is diluted with demineralized water to 25%. The results of the tests are shown in Tables 1 and 2 hereinbelow.
Example 5
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked to
luylenediisocyanate and an aminofor
maldehyde resin 13.90
titanium dioxide 2.40 pigment lead silicochromate 0.50 (carbon black 0.08 filler - microtalcum 1.30 neutralization agent - formic acid 0.40
lead acetate 0.27
organic solvent - ethylglycol acetate 8.90
water the balance
The procedure of preparation and testing of the composition according to the present invention is effected in a manner similar to that of Example 1, the mixture resulting from the homogenization being diluted with demineralized vrater to 18%.
The tests results are shown in Tables 1 and 2 hereinbelow. In addition, to determine the cohesion of the primer coating to coat layers, physico-mechanical properties of the primer and complex coatings based on the composition have been tested. The results of these tests are shown in Table 3.
Example 6
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked to
luylenediisocyanate and an amino
-formaldehyde resin 6.200
titanium dioxide 1.040 pigment carbon black 0.034 filler - microtalcum 0.480 neutralization agent - formic acid 0.130 organic solvent - ethylglycol acetate 3.400
isopropanol 0.200 lead acetate 0.200 oligomeric azo dye of the general formula:
wherein: R1 = OCH3, A =
n = I;
R2 - residue of fatty acids
of tall oil 0.104
manganese acetate 0.005
water the balance.
The procedure of preparation and testing of the composition according to the present invention is effected in a manner similar to that described in
Example 1 hereinbefore, except that charged into the dissolver are 10 g of the adduct, 4.9 g ofethylglycolacetate and 0.15 g of isopropanol, 0.3 g of carbon black, 1.8 g of a 505'5 solution of azo dye in ethylglycolacetate, intermixed and added with 9.0 g of titanium dioxide, 4.2 g of microtalcum, 1.77 g of lead acetate and 0.045 g of manganese acetate, After dispersing, the resulting mixture is added with 66.7 of the adduct also neutralized with formic acid.
The results of the tests are shown in the following Tables 1 and 2.
Example 7
A composition or a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked
toluylenediisocyanate and an amino
formaldehyde resin 6.750
pigment - carbon black 0.180
filler - china clay 0.520
neutralization agent - formic acid 0.150
organic solvent - ethylglycol acetate 3.600
cyclohexanone 0.270
lead acetate 0.250
oligomeric azo dye of the general formula (I), wherein Ais
1 is -N(c2R5)2, n = 1, R2 is a residue
of fatty acids of tall oil 0.128
manganese acetate 0.006
water the balance.
The preparation and testing of the resulting composit ion according to the present invention are effected in the following manner.
Into a dissolver there are charged 10 g of the adduct with the dry solids residue of 68% neutralized with formic acid, 3.2 g of ethylglycol acetate and 0.3 g of cyclohexanone, 2.16 g of a 50 solution of the azo dye in ethylglycol acetate, intermixed, then added with 1.5 g of carbon black, 4.4 g of chaina clay, 2.16 g of lead acetate, 0.053 g of manganese acetate and again intermixed, followed by dispergation. Aftervards, 76.? g of the adduct are added (also neutralized with formic acid) and stirring is effected till a full homogenization.- The resulting mixture is diluted with demineralized water to the concentration of 8%. From the thus-prepared composition according to the present invention with the pH value of 6.2 a coating is applied onto a non-phosphatized steel to a thickness of 18-20 at at the voltage of 200 V for 120 seconds. The coat- ing is dried for 30 minutes at the temperature of 1800C and tested. The results of the tests are shove in
Tables 1 and 2 hereinbelow.
Example 8
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked to
luylenediisocyanate and a melamino
formaldehyde resin 18.680
itanium dioxide 3.270 pigment - carbon black 0.110 filler - microtalcum 1.500 neutralization agent - acetic acid 0.420 organic solvent -.ethylglycol acetate 11.00
toluene 0.30 lead acetate 0.640 oligomeric azo dye of the general formula (I), wherein
n = 2;
R2 is a residue of resin acids 0.0330
manganese formate 0.016
water the balance.
The procedure of preparation and testing of the thusprepared composition according to the present invention is effected in a manner similar to that described in Example 6 hereinbefore, but in so doing use is made of ethylglycol acetate and toluene.
Furthermore, the dilution is effected to the concentration of 25%.
The results of the tests are shown in Table 1 and 2 hereinbelow.
Example 9
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked
toluylene diisocyanate and a melamino
formaldehyde resin - 21.20
pigment - carbon black 0.56
filler - china clay 1.63
neutralization agent - formic acid 0.47
organic solvent - ethylglycol acetate 12.03
xylene 0.10
lead acetate 0.80 oligomeric azo dye of the general formula
(I), wherein A = (II), n = 2,
R2 is a residue of resin acids 0.40
manganese acetate 0.02
water the balance.
The procedure of preparation and testing of the resulting '.tion according to the present invention is effected in a manner similar to that of Example 7 hereinbefore, except that use is made of 3.4 g of ethylglycol acetate and 0.1 g of xylene. The dilution with demineralized water is effected to the concentration of 25%.
The test results are shown in Tables 1 and 2 hereinbelow.
Example 10
A composition for a cathodic electrodeposition is prepared from the following components, per cent by mass:
epoxyrubber adduct with imidazoline
groups modified with semiblocked to
luylene diisocyanate and a melino- formaldehyde resin 13.44
pigment titanium dioxide 2.30 carbon black 0.08 filler - microtalcum 1.10 neutralization agent - formic acid 0.30 organic solvent - ethylglycol acetate 8.18 lead acetate 0.460
oligomeric azo dye of the general
formula (I), wherein A is
R1 = -NO2, n = 1, R2 is a residue
of fatty acids of tall oil 0.230 manganese acetate 0.012 water the balance.
The preparation and tests of the resulting composit'ion according to the present invention are effected in a manner similar to that described in Example 6 hereinbefore, except that the use is made of 5.05 g of ethylglycol acetate. The dilution is carried out using demineralized water to the concentration of 18%.
The test results are shown in Tables 1, 2 and 3 hereinbelow.
Table 1 Dispers ng power of compositions, physico-mechanical
and corrosion-protective properties of a primer
coating based thereon
Compositions of Examples
Characteristics ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 2 3 4 5 6 7
Dispersing power, cm 18.5 18.0 19.0 18.5 19.5 25.5 25.0
Impact strength of the coating, kg.cm (a) under usual dry
ing conditions 180-200"0 -3-in 50 50 50 50 50 50 50 (b) under overdrying 180-2000C - 45 nin 50 50 50 50 50 50 50 (c) under overdrying at 220"0 for 30 min 50 50 50 50 50 50 50
Tensile strength of the coating, mm (a) under usual drying conditions:: 180-200 C - 30 min 8.5 8.5 8.5 8.5 8.5 8.5 8.5 (b) under overdrying 180-200 C - 45 min 8.5 8.5 8.5 8.5 8.5 8.5 8.5 (c) under overdrying at 2200C - 30 in 8.5 8.5 8.5 8.5 8.5 8.5 8.5
Salt-resistance of coatings (mist of a 5% solution of
NaCl) applied on::
Table 1 (continued)
Compositions of Examples Characteristics 1 2 3 4 ' 5 6 7 (a) steel (thickness 18-20 m) h 550 550 550 550 550 550 550 (b) steel (coating thickness 5-8 ) hours 72 72 72 72 72 150 150 (c) phosphatized steel (coating thickness 18-20 m) 1,200 1,200 1,200 1,200 1,200 1,200 1,200 unable 1 (continued) Compositions of Examples
Characteristics
8 9 10 (US,A,4253930) Dispercing power, cm 26.0 25.0 27 16
Impact strength of the coating, kg.cm: (a) under usual drying conditions 180-200 C, 30 minutes 50 50 50 50 (b) under overdrying 180-2000C, 45 min 50 50 50 40 (c) under overdrying at 220 C, 30 min 50 50 50 40
Tensile strength of the coating, mm:: (a) under usual drying conditions, 19G-200 C, 30 min 8.5 8.5 8.5 6.4 (b) under overdrying at 180-200 C, 45 min 8.5 8.5 8.5 5.0 (c) under overdrying at 2200C - 30 min 8.5 8.5 8.5 4.5
Salt-resistance of coatings (mist of 5% solution of
NaCl)
Table 1 (continued)
Composition of Example
Characteristics
8 9 10 (-uS,A,4253930) (a) steel (thickness of coatings 18-20,pm) h 550 550 550 360 (b) steel (coating thickness 5-8 m) h 150 150 150 60 (c) phosphate steel (coating thickness 18-20 m), h 1,200 1,200 1,200 800
Teble 2
Uniformity of distribution of the coating thiciness
depending on its distance from the anode,
Distance from Compositions of Examples the anode, cm
I 2 3 4 5 5 7 8
0-3 27.0 26.0 26.5 28.0 26.0 18.5 18.1 19.5
3-6 25.0 23.0 24.0 25.0 24.8 18.1 17.3 18.3
6-9 23.5 22.5 22.0 23.0 23.8 17.1 16.7 17.7
9-12 20.1 20.5 20.5 21.0 21.9 16.5 16.1 17.0
12-15 18.4 1 .2 18.7 18.5 18.2 16.2 15.4 16.6
15-18 17.0 17.5 16.2 15.0 15.5 15.9 14.2 16.3
81-21 16.2 15.3 15.0 11.0 12.5 14.5 13.7 15.5
21- 24 15.4 13.2 13.7 9.5 10.2 13.8 13.3 15.2
24-27 14.3 11.5 11.0 8.0 9.0 13.2 12.9 14.9
27-30 11.0 9.2 9.7 7.5 7.8 13.0 12.7 14.3
30-33 10.7 7.5 8.2 6.5 6.5 12.8 12.1 13.8
33-36 10.5 8.0 7.5 5.5 5.7 12.5 11.7 13.3
36-39 9.0 6.2 6.4 4.8 5.0 12.3 11.4 12.9
39-42 7.8 5.7 5.6 3.5 4.2 11.8 10.8 12.7
42-45 6.0 4.0 4.3 3.0 3.5 11.1 10.5 12.1
45-48 4.5 3.5 3.7 2.7 3.0 10.5 10.1 11.5
48-51 3.0 3.0 2.2 2.5 2.5 9.1 9.9 11.2
51-54 2.2 2.7 - 2.3 2.0 8.8 9.5 10.9
54-57 -* 2.5 - 2.0 - 8.6 9.1 10.6 57-60 - -* - - - 8.6 8.5 10.2 60-53 - - - - - 8.4 8.2 9.8 No o coating, clean metal.
Table 2 (continued)
Distance from Compositions of Examples the anode, cm
9 10 (US, A, 4253930) 0-3 18.0 20 25 3-6 17.7 18.1 23 6-9 17.4 17.5 21.5 9-12 16.0 16.8 16.0 12-15 15.8'- 16.4 15.2 15-18 15.0- 16.0 14.7 18-21 14.7 15.2 13.0 21-24 14.3 14.8 12.1 24-27 13.9 14.6 10.9 27-30 13.7 14.2 10.3 30-33 13.0 13.7 9.7 33-36 12.6 13.3 8o3 36-39 12.4 12.8 6.0 39-42 12.1 12.4 4.2 42-45 11.7 12.8 3.5 45-48 11.3 11.9 2.0 48-51 10.8 11.6 * 51-54 9.6 11.3 54-57 9.3 10.8 57-60 8.9 1006 60-63 8.5 10.2 *) No coating, clean metal.
Table 3
Properties of the primer and complex coatings Coating of Coating Impact Tensile Peeling
Coatings of thick- strength strength of the ness, of the of the coating, coating, coating, tone test,
kg.cm mm mm
1 2 3 4 5 1.Example 5 18-20 50 '8.5 0 2.Example 10 18-20 50 8.5 0 3.Fçnovrn composition
(US,A,4253930) 18-20 50 6.4 1-2 4.Example 5 +
water-diluted pri
mer coating app
lied by spraying 45-50 50 7.0 1-2 5.Example 10 + water-diluted primer coating ap
lied by spraying 45-50 50 7.0 1-2 6.1nown composition
(US, A, 4253930)
+ water-diluted
primer coating ap
plied by spraying 45-50 30 3.0 4-5 7.Example 5 + organosoluble pri
mer coating 45-50 50 7.0 1-2 8.Example 10 +
organosoluble pri
mer coating 45-50 50 7.5 1-2
Table 3 (continued)
1 2 3 4 5 Known composi
tion (US,A,
4253930) + or
nosoluble pri
mer coating 45-50 40 5.0 3-4 10.Example 5 + two
layers of water
-diluted enamel 100-110 40 6.0 3-4 11.Example 10 + two
layers of water diluted enamel 100-110 40 6.5 1-2 12.Known composition
(US,A,4253930) +
two layers of
water-diluted
enamel 100-110 20 1.5-2.0 10 13.Example 5 + orga
nosoluble primer
coating + t'vo lay
ers of organosolub
le enamel 100-120 40 6.0 2-3 14.Example 10 + orga
nosoluble primer
coating + two lay
ers of an organoso- 100-120 40 6.0 1-2 luble enamel 15. Know composition (US,A,4253930) + an
organosoluble prim- er coating + two lay
ers of an organosolu
ble enamel 100-120 40 4.5-5o0 4-5
Claims (3)
1. A composition for a cathodic electrodeposition comprising an epoxyrubber adduct with imidazoline groups modified with semiblocked toluylene diisocyenate and/or an aminoformaldehyde resin, a pigment, a filler, lead acetate or formate, a neutralization agent, an organic solvent and water at the following proportions of the components, per cent by mass:
adduct 6.20 - 21.30
pigment 0.18.- 5.10
filler 0.48 - 2.20
neutralization agent 0.13 - 0.57
lead acetate or formate 0.12 - 0.84
organic solvent 3.30 - 13.30
water the balance.
2. A composition according to Claim 1, wherein an oligomeric azo dye is additionally incorporated having the general formula:
wherein
R1 = - OCH3 , - N(C2H5)2 , - NO2 ;
R2 - a residue of fatty acids of tall oil or a residue
of resin acids; n = 1, 2 and manganese acetate or formate, at the following proportions of the components, per cent mass:
adduct 6.20 - 21.20
pigment 0.18 - 3.40
filler 0.48 - 1.70
neutralization agent 0.13 - 0.47
lead acetate or formate 0.20 - 0.80
oligomeric azo dye 0.10 - 0.40
manganese acetate or formate 0.005 - 0.02
organic solvent 3.30 - 12.20
Water the balance.
3. A composition according to the foregoing Claims 1 and 2, substantially as described in the Specification and Examples hereinbefore.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9026629A GB2250512A (en) | 1990-12-07 | 1990-12-07 | Composition for cathodic electrodeposition |
| FR9015785A FR2670509A1 (en) | 1990-12-07 | 1990-12-17 | Composition for deposition using cathodic electrical precipitation |
| CN90110012.9A CN1062914A (en) | 1990-12-07 | 1990-12-25 | The composition that is used for cathode electrodeposition |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9026629A GB2250512A (en) | 1990-12-07 | 1990-12-07 | Composition for cathodic electrodeposition |
| CN90110012.9A CN1062914A (en) | 1990-12-07 | 1990-12-25 | The composition that is used for cathode electrodeposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9026629D0 GB9026629D0 (en) | 1991-01-23 |
| GB2250512A true GB2250512A (en) | 1992-06-10 |
Family
ID=36764614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9026629A Withdrawn GB2250512A (en) | 1990-12-07 | 1990-12-07 | Composition for cathodic electrodeposition |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1062914A (en) |
| FR (1) | FR2670509A1 (en) |
| GB (1) | GB2250512A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998055551A1 (en) * | 1997-06-06 | 1998-12-10 | Engelhard Corporation | Improved kaolin composition for use in electrodeposition paints |
| WO2010077404A1 (en) * | 2008-12-29 | 2010-07-08 | Basf Coatings Gmbh | Pyridine group-containing electrocoat resin |
| EP3950149A4 (en) * | 2019-03-29 | 2022-12-07 | Kansai Paint Co., Ltd | Cationic electrodeposition coating material composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2028337A (en) * | 1978-06-27 | 1980-03-05 | Nippon Soda Co | Paint composition for cationic electrodeposition |
| GB2030987A (en) * | 1978-09-08 | 1980-04-16 | Kansai Paint Co Ltd | Epoxy resin and its use in paont compsitions for cathodic electrodeposition |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4253930A (en) * | 1979-07-16 | 1981-03-03 | Nippon Paint Co., Ltd. | Process for electrodepositing cationic compositions |
| DE3422472A1 (en) * | 1984-06-16 | 1985-12-19 | Basf Ag, 6700 Ludwigshafen | METHOD FOR PRODUCING EPOXIDE / AMINE ADDUCTS CONTAINING AMIDE GROUPS |
| JPS62127360A (en) * | 1985-11-27 | 1987-06-09 | Kansai Paint Co Ltd | Coating composition for resin |
| DE3542594A1 (en) * | 1985-12-03 | 1987-06-04 | Basf Lacke & Farben | BY PROTONING WITH ACID, WATER-DETERMINABLE BINDING AGENT, THE PRODUCTION AND USE THEREOF |
-
1990
- 1990-12-07 GB GB9026629A patent/GB2250512A/en not_active Withdrawn
- 1990-12-17 FR FR9015785A patent/FR2670509A1/en active Pending
- 1990-12-25 CN CN90110012.9A patent/CN1062914A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2028337A (en) * | 1978-06-27 | 1980-03-05 | Nippon Soda Co | Paint composition for cationic electrodeposition |
| GB2030987A (en) * | 1978-09-08 | 1980-04-16 | Kansai Paint Co Ltd | Epoxy resin and its use in paont compsitions for cathodic electrodeposition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998055551A1 (en) * | 1997-06-06 | 1998-12-10 | Engelhard Corporation | Improved kaolin composition for use in electrodeposition paints |
| US5968250A (en) * | 1997-06-06 | 1999-10-19 | Engelhard Corporation | Kaolin composition for use electrodeposition paints |
| WO2010077404A1 (en) * | 2008-12-29 | 2010-07-08 | Basf Coatings Gmbh | Pyridine group-containing electrocoat resin |
| EP3950149A4 (en) * | 2019-03-29 | 2022-12-07 | Kansai Paint Co., Ltd | Cationic electrodeposition coating material composition |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9026629D0 (en) | 1991-01-23 |
| FR2670509A1 (en) | 1992-06-19 |
| CN1062914A (en) | 1992-07-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |