US4661223A
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Process for coating an electrically conductive substrate and an aqueous composition containing a cationic binder
Assignee: Akzo NV
•
Filing: 1985-12-05
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Granted: 1987-04-28
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Expires: 2005-12-05
Abstract
Abstract A process is provided for coating an electrically conductive substrate with an aqueous coating composition containing a cationic binder wherein the binder is obtained by polymerization of 100 parts by weight of a specified monomer mixture in the presence of a specified ethylenically unsaturated polyester resin, the degree of unsaturation being between 0.1-5.0 equivalents per 1000 molecular weight units and the maximum degree being dependent on the molecular weight and the weight proportion of the polyester. The invention also pertains to the aqueous coating composition as such.
Inventors
- 👤 Angelika A. Zedler
- 👤 Jean J. Trescol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:54
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/308; C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0478; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/28; C08G18/40; C08G18/63; C08G18/631; C08G18/635; C08G18/638; C09; C09D; C09D151/00; C09D151/08; C09D5/00; C09D5/44; C09D5/4419; C09D5/4423
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
297 words
A process for coating an electrically conductive substrate with an aqueous coating composition containing a cationic binder, which comprises: (a) preparing a binder by polymerizing (i) 100 parts by weight of a monomer mixture consisting of 1-30% by weight of a hydroxyalkyl or hydroxycycloalkyl acrylate or methacrylate wherein the alkyl or cycloalkyl group has 2-8 carbon atoms, (ii) 4-45% by weight of an aminoalkyl acrylate or aminoalkyl methacrylate of the formula: ##STR3## wherein R 1 is an alkyl group having 1-12 carbon atoms or a cycloalkyl group having 5-8 carbon atoms, or groups R 1 together form an alkylene group having 4-7 carbon atoms which together with the nitrogen atom forms a heterocyclic ring system, and wherein one of the groups R 1 may be a hydrogen atom, R 2 is a hydrocarbon group having 2-12 carbon atoms and R 3 is a hydrogen atom or a methyl group, and (iii) 40-80% by weight of a monovinyl aromatic hydrocarbon having 8-14 carbon atoms and 0-35% by weight of a different monoethylenically unsaturated monomer having 2-20 carbon atoms, in the presence of A=1-60 parts by weight of a polyester resin having a hydroxyl number in the range of 15 to 150, a calculated number average molecular weight M n of 800-10,000 and U=0.1-5.0 equivalents of ethylenically unsaturated double bonds per 1000 molecular weight units, provided that the maximum value U max of U equals ##EQU3## (b) neutralizing the amino groups contained in the binder at least partially with an acid before, during or after polymerization, and then, (c) preparing an aqueous coating composition by adding to the resultant cationic binder water, pigment and a curing agent for the binder; (d) coating the electrically conductive substrate with said aqueous coating composition by cataphoretic deposition; and (e) curing the coating.
Claim 2
Dependent Claim
297 words
A process for coating an electrically conductive substrate with an aqueous coating composition containing a cationic binder, which comprises: (a) preparing a binder by polymerizing (i) 100 parts by weight of a monomer mixture consisting of 1-30% by weight of a hydroxyalkyl or hydroxycycloalkyl acrylate or methacrylate wherein the alkyl or cycloalkyl group has 2-8 carbon atoms, (ii) 4-45% by weight of an aminoalkyl acrylate or aminoalkyl methacrylate of the formula: ##STR3## wherein R 1 is an alkyl group having 1-12 carbon atoms or a cycloalkyl group having 5-8 carbon atoms, or groups R 1 together form an alkylene group having 4-7 carbon atoms which together with the nitrogen atom forms a heterocyclic ring system, and wherein one of the groups R 1 may be a hydrogen atom, R 2 is a hydrocarbon group having 2-12 carbon atoms and R 3 is a hydrogen atom or a methyl group, and (iii) 40-80% by weight of a monovinyl aromatic hydrocarbon having 8-14 carbon atoms and 0-35% by weight of a different monoethylenically unsaturated monomer having 2-20 carbon atoms, in the presence of A=1-60 parts by weight of a polyester resin having a hydroxyl number in the range of 15 to 150, a calculated number average molecular weight M n of 800-10,000 and U=0.1-5.0 equivalents of ethylenically unsaturated double bonds per 1000 molecular weight units, provided that the maximum value U max of U equals ##EQU3## (b) neutralizing the amino groups contained in the binder at least partially with an acid before, during or after polymerization, and then, (c) preparing an aqueous coating composition by adding to the resultant cationic binder water, pigment and a curing agent for the binder; (d) coating the electrically conductive substrate with said aqueous coating composition by cataphoretic deposition; and (e) curing the coating.
Claim 3
Dependent Claim
28 words
A process according to claim 1, wherein the hydroxyalkyl or hydroxycycloalkyl acrylate or methacrylate in the monomer mixture is hydroxy ethyl acrylate, hydroxy propyl acrylate or mixtures thereof.
Claim 4
Dependent Claim
22 words
A process according to claim 1, wherein the monomer mixture contains 5-24% by weight of the hydroxyalkyl or hydroxycycloalkyl acrylate or methacrylate.
Claim 5
Dependent Claim
34 words
A process according to claim 1, wherein the amino acrylate or amino methacrylate in the monomer mixture is an alkylamino or dialkylamino acrylate or methacrylate of which the alkyl groups have 1-4 carbon atoms.
Claim 6
Dependent Claim
32 words
A process according to claim 1, wherein as the amino acrylate or amino methacrylate in the monomer mixture is β-alkylaminoethyl or β-dialkylaminoethyl acrylate or methacrylate the alkyl groups have 1-4 carbon atoms.
Claim 7
Dependent Claim
20 words
A process according to claim 1, wherein the monomer mixture contains 7-40% by weight of amino acrylate or amine methacrylate.
Claim 8
Dependent Claim
22 words
A process according to claim 1, characterized in that the monomer mixture contains 10-28% by weight of amino acrylate or amine methacrylate.
Claim 9
Dependent Claim
19 words
A process according to claim 1, wherein the monovinyl aromatic hydrocarbon in the monomer mixture has 8-10 carbon atoms.
Claim 10
Dependent Claim
18 words
A process according to claim 8, wherein the monovinyl aromatic hydrocarbon is styrene, vinyl toluene or mixtures thereof.
Claim 11
Dependent Claim
19 words
A process according to claim 1, wherein the monomer mixture contains 40-65% by weight of the monovinyl aromatic hydrocarbon.
Claim 12
Dependent Claim
20 words
A process according to claim 1, wherein the monomer mixture contains 0-15% by weight of a different monoethylenically unsaturated monomer.
Claim 13
Dependent Claim
65 words
A process according to claim 1, wherein the polyester resin is prepared by condensing one or more aliphatic, cycloaliphatic mono-, di- or polyvalent alcohols having 2-24 carbon atoms and one or more aliphatic, cycloaliphatic or aromatic mono-, di- or polyvalent carboxylic acids having 2-36 carbon atoms, or the anhydrides or acid halides thereof, or the esters of such acids with alcohols having 1-6 carbon atoms.
Claim 14
Dependent Claim
13 words
A process according to claim 12, wherein the alcohol has 2-9 carbon atoms.
Claim 15
Dependent Claim
18 words
A process according to claim 13, wherein the alcohol is neopentyl glycol, trimethylol propane, pentaerythritol or mixtures thereof.
Claim 16
Dependent Claim
14 words
A process according to claim 12, wherein the carboxylic acid has 2-12 carbon atoms.
Claim 17
Dependent Claim
16 words
A process according to claim 12, wherein the cycloaliphatic or aromatic dicarboxylic acid has 8-10 carbon.
Claim 18
Dependent Claim
26 words
A process according to claim 16, wherein the dicarboxylic acid is a tetrahydrobenzene dicarboxylic acid, a hexahydrobenzene dicarboxylic acid, a benzene dicarboxylic acid or mixtures thereof.
Claim 19
Dependent Claim
14 words
A process according to claim 12, wherein the fatty acid has 5-18 carbon atoms.
Claim 20
Dependent Claim
14 words
A process according to claim 12, wherein the fatty acid has 7-18 carbon atoms.
Claim 21
Dependent Claim
21 words
A process according to claim 12, wherein the polyester is prepared using 3-70% by weight of an ethylenically unsaturated fatty acid.
Claim 22
Dependent Claim
21 words
A process according to claim 20, wherein the polyester is prepared using 5-55% by weight of an ethylenically unsaturated fatty acid.
Claim 23
Dependent Claim
28 words
A process according to claim 1, comprising polymerizing 100 parts by weight of the monomer mixture in the presence of 5-50 parts by weight of the polyester resin.
Claim 24
Dependent Claim
28 words
A process according to claim 1, comprising polymerizing 100 parts by weight of the monomer mixture in the presence of 5-40 parts by weight of the polyester resin.
Claim 25
Dependent Claim
40 words
A process according to claim 1, wherein the monomer mixture contains hydroxyalkyl or hydroxycycloalkyl acrylate or methacrylate, monovinyl aromatic hydrocarbon and the said different ethylenically unsaturated monomer in amounts such that the binder contains more than 70% by weight thereof.
Claim 26
Dependent Claim
40 words
A process according to claim 1, wherein the polyester resin has a hydroxyl number of 30-70, a calculated number average molecular weight of 1500-8000 and an unsaturation of 0.3-3.5 equivalents of ethylenically unsaturated double bonds per 1000 molecular weight units.
Claim 27
Dependent Claim
25 words
A process according to claim 1, wherein cataphoretic deposition is at a voltage of 50-500 and an initial current density of 0.1-40 A/m 2 .
Claim 28
Dependent Claim
23 words
A process according to claim 1, wherein the coating applied to the substrate is cured by baking at a temperature of 90°-250° C.
Claim 29
Dependent Claim
23 words
A process according to claim 1, wherein the coating applied to the substrate is cured by baking at a temperature of 110°-200° C.
Claim 30
Dependent Claim
240 words
An aqueous coating composition comprising a cationic binder prepared by polymerizing: (i) 100 parts by weight of a monomer mixture consisting of 1-30% by weight of a hydroxyalkyl or or hydroxycycloalkyl acrylate or methacrylate wherein the alkyl or cycloalkyl group has 2-8 carbon atoms; (ii) 4-45% by weight of aminoacrylate or aminomethacrylate of the formula: ##STR4## wherein R 1 is an alkyl group having 1-12 carbon atoms or a cycloalkyl group having 5-8 carbon atoms, or groups R 1 together form an alkylene group having 4-7 carbon atoms which together with the nitrogen atom forms a heterocyclic ring system, and wherein one of the groups R 1 may be a hydrogen atom, R 2 is a hydrocarbon group having 2-12 carbon atoms and R 3 is a hydrogen atom or a methyl group, and (iii) 40-80% by weight of a monovinyl aromatic hydrocarbon having 8-14 carbon atoms and 0-35% by weight of a different monoethylenically unsaturated monomer having 2-20 carbon atoms, in the presence of A=1-60 parts by weight of a polyester resin having a hydroxyl number in the range of 15 to 150, a calculated number average molecular weight Mn of 800-10,000 and U=0.1-5.0 equivalents of ethylenically unsaturated double bonds per 1000 molecular weight units, provided that the maximum value U max of U equals ##EQU4## the amino groups contained in the binder being at least partly neutralized with the aid of an acid before, during or after polymerization.
Claim 31
Dependent Claim
240 words
An aqueous coating composition comprising a cationic binder prepared by polymerizing: (i) 100 parts by weight of a monomer mixture consisting of 1-30% by weight of a hydroxyalkyl or or hydroxycycloalkyl acrylate or methacrylate wherein the alkyl or cycloalkyl group has 2-8 carbon atoms; (ii) 4-45% by weight of aminoacrylate or aminomethacrylate of the formula: ##STR4## wherein R 1 is an alkyl group having 1-12 carbon atoms or a cycloalkyl group having 5-8 carbon atoms, or groups R 1 together form an alkylene group having 4-7 carbon atoms which together with the nitrogen atom forms a heterocyclic ring system, and wherein one of the groups R 1 may be a hydrogen atom, R 2 is a hydrocarbon group having 2-12 carbon atoms and R 3 is a hydrogen atom or a methyl group, and (iii) 40-80% by weight of a monovinyl aromatic hydrocarbon having 8-14 carbon atoms and 0-35% by weight of a different monoethylenically unsaturated monomer having 2-20 carbon atoms, in the presence of A=1-60 parts by weight of a polyester resin having a hydroxyl number in the range of 15 to 150, a calculated number average molecular weight Mn of 800-10,000 and U=0.1-5.0 equivalents of ethylenically unsaturated double bonds per 1000 molecular weight units, provided that the maximum value U max of U equals ##EQU4## the amino groups contained in the binder being at least partly neutralized with the aid of an acid before, during or after polymerization.
Claim 32
Dependent Claim
22 words
A composition according to claim 29, wherein the monomer mixture contains 5-24% by weight of the hydroxyalkyl or hydroxycycloalkyl acrylate or methacrylate.
Claim 33
Dependent Claim
21 words
A composition according to claim 29, wherein the monomer mixture contains 7-40% by weight of the amino acrylate or amino methacrylate.
Claim 34
Dependent Claim
19 words
A composition according to claim 29, wherein the monomer mixture contains 40-65% by weight of the monovinyl aromatic hydrocarbon.
Claim 35
Dependent Claim
67 words
A composition according to claim 29, wherein the polyester resin is prepared by polycondensation of one or more aliphatic or cycloaliphatic mono-, di- or polyvalent alcohols having 2-24 carbon atoms and one or more aliphatic, cycloaliphatic and/or aromatic mono-, di- or polyvalent carboxylic acids having 2-36 carbon atoms or the anhydrides or acid halides thereof or the esters of such acids with alcohols having 1-6 carbon atoms.
Claim 36
Dependent Claim
13 words
A composition according to claim 33, wherein the alcohols have 2-9 carbon atoms.
Claim 37
Dependent Claim
20 words
A composition according to claim 33, wherein the acid is a cycloaliphatic or aromatic dicarboxylic acid having 8-10 carbon atoms.
Claim 38
Dependent Claim
18 words
A composition according to claim 33, wherein the aliphatic acid is a fatty acid having 5-18 carbon atoms.
Claim 39
Dependent Claim
20 words
A composition according to claim 33, wherein the polyester contains from 3-70% by weight of an ethylenicaly unsaturated fatty acid.
Claim 40
Dependent Claim
35 words
A composition according to claim 29, wherein the cationic binder is obtained by polymerization of 100 parts by weight of the monomer mixture in the presence of 5-40 parts by weight of the polyester resin.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
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