EP0264983A1
Expired / Lapsed
EP
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An aqueous coating composition and a process of coating a substrate with such coating composition
Assignee: Akzo NV
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Filing: 1987-09-17
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Granted: —
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Expires: 2007-09-17
Abstract
Abstract The invention provides an aqueous coating composition curable at ambient temperature comprising a polyacetoacetate, a polyamino amide having an amine number of 60-1000, and a nitroalkane, a formic acid ester or an organic compound occurring in at least 2 tautomeric forms, and in one of the tautomeric forms a labile hydrogen atoms is linked to a carbon atom. A process of coating a substrate with such composition is also provided.
Inventors
- 👤 Arie Noomen
- 👤 Petrus Johannes Peters
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K3/00; C08K3/01; C08K3/013; C08L; C08L95/00; C09; C09D; C09D201/00; D; D06; D06N; D06N5/00; C08L21/00; C08L23/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
147 words
An aqueous coating composition based on an organic compound and a curing agent for it, characterized in that the organic compound is a compound having at least 2 acetoacetate groups and the curing agent is a polyamino amide having an amine number of 60-1000 built up from a mono-and/or dicarboxylic acid having 2-40 carbon atoms and a polyamine having 2-6 primary amino groups and 2-20 carbon atoms, and the coating composition further comprises a nitroalkane having 1-6 carbon atoms, an organic compound occurring in at least 2 tautomeric forms, and in one of the tautomeric forms a labile hydrogen atom is linked to a carbon atom and which compound contains at least one carbonyloxy group or sulphonyl group, and/or a formic acid ester having a solubility of at least 0,2 g in 100 g of water having a temperature of 20°C, with the exception of tert.butyl formiate.
Claim 2
Dependent Claim
147 words
An aqueous coating composition based on an organic compound and a curing agent for it, characterized in that the organic compound is a compound having at least 2 acetoacetate groups and the curing agent is a polyamino amide having an amine number of 60-1000 built up from a mono-and/or dicarboxylic acid having 2-40 carbon atoms and a polyamine having 2-6 primary amino groups and 2-20 carbon atoms, and the coating composition further comprises a nitroalkane having 1-6 carbon atoms, an organic compound occurring in at least 2 tautomeric forms, and in one of the tautomeric forms a labile hydrogen atom is linked to a carbon atom and which compound contains at least one carbonyloxy group or sulphonyl group, and/or a formic acid ester having a solubility of at least 0,2 g in 100 g of water having a temperature of 20°C, with the exception of tert.butyl formiate.
Claim 3
Dependent Claim
22 words
A coating composition according to claim 1, characterized in that the compound containing acetoacetate groups is an addition polymer containing acetoacetate groups.
Claim 4
Dependent Claim
26 words
A coating composition according to claim 1, characterized in that the polyamino amide is built up from a saturated aliphatic monocarboxylic acid having 1-24 carbon atoms.
Claim 5
Dependent Claim
24 words
A coating composition according to claim 1, characterized in that the polyamino amide is built up from a dicarboxylic acid having 8-36 carbon atoms.
Claim 6
Dependent Claim
27 words
A coating composition according to claim 1, characterized in that the polyamino amide is built up from a polyamine having 2-3 primary and 0-4 secondary amino groups.
Claim 7
Dependent Claim
56 words
A coating composition according to claim 1, characterized in that the polyamino amide is built up from a polyamine of the formula H₂N-(R₂-NH) n -R₁-NH₂ wherein the group R₁ and the n groups R₂ may be the same or different and represent an alkylene group having 2-6 carbon atoms and n is a number from 1-6.
Claim 8
Dependent Claim
32 words
A coating composition according to claim 1, characterized in that the polyamino amide is built up from an aliphatic, cycloaliphatic or aromatic amino compound having 2 or 3 exclusively primary amino groups.
Claim 9
Dependent Claim
19 words
A coating composition according to claim 1, characterized in that the polyamino amide has an amine number of 80-750.
Claim 10
Dependent Claim
19 words
A coating composition according to claim 1, characterized in that the polyamino amide has an amine number of 200-600.
Claim 11
Dependent Claim
34 words
A coating composition according to claim 1, characterized in that the polyamino amide is present as mixture of the polyamino amide and an amino compound in an amount of at least 3 equivalent %.
Claim 12
Dependent Claim
27 words
A coating composition according to claim 10, characterized in that the polyamino amide is present in the unblocked form and the amino compound in the blocked form.
Claim 13
Dependent Claim
72 words
A coating composition according to claim 1, characterized in that the compound having at least 2 α, β-ethylenically unsaturated carboxylate groups, the polyamino amide and the amino compound, if any, are present in an amount such that the ratio of the number of equivalents of ethylenically unsatur ated double bonds of the compound having carboxylate groups to the number of equivalents of amine hydrogen is in the range of 0,3 to 3,0
Claim 14
Dependent Claim
20 words
A coating composition according to claim 17, characterized in that the ratio is in the range of 1/2 to 2.
Claim 15
Dependent Claim
16 words
A coating composition according to claim 1, characterized in that the nitroalkane has 1-4 carbon atoms.
Claim 16
Dependent Claim
16 words
A coating composition according to claim 14, characterized in that the nitroalkane is nitroethane or nitropropane.
Claim 17
Dependent Claim
31 words
A coating composition according to claim 1, characterized in that the organic compound which occurs in at least 2 tautomeric forms is 2,4-pentanedione, methyl acetoacetate or ethyl acetoacetate or methyl cyanoacetate.
Claim 18
Dependent Claim
26 words
A coating composition according to claim 1, characterized in that the ester is an ester of formic acid and a monovalent alcohol having 1-6 carbon atoms.
Claim 19
Dependent Claim
26 words
A coating composition according to claim 1, characterized in that the ester is an ester of formic acid and a monovalent alcohol having 1-5 carbon atoms.
Claim 20
Dependent Claim
57 words
A coating composition according to claim 1 characterized in that the ester is a formic acid ester of the general formula H - OCHR₁R₂ wherein R₁ and R₂ may be the same or different and represent a hydrogen atom or an alkyl group and the groups R₁ and R₂ together contain not more than 5 carbon atoms.
Claim 21
Dependent Claim
20 words
A coating composition according to claim 1, characterized in that the ester is methyl formiate, ethyl formiate or isopropyl formiate.
Claim 22
Dependent Claim
29 words
A coating composition according to claim 1, characterized in that the ester is an ester of formic acid and a bi- or polyvalent hydroxy compound having 2-8 carbon atoms.
Claim 23
Dependent Claim
28 words
A coating composition according to claim 1, characterized in that the ester has a solubility of 0,2-50 g in 100 g of water having a temperature of 20°C.
Claim 24
Dependent Claim
28 words
A coating composition according to claim 1, characterized in that the ester has a solubility of 0,5-35 g in 100 g of water having a temperature of 20°C.
Claim 25
Dependent Claim
35 words
A coating composition according to claim 1, characterized in that the ester is present in an amount such that 0,3-2 equivalents of formiate are present per equivalent of nitrogen of the amino group-containing curing agent.
Claim 26
Dependent Claim
22 words
A coating composition according to claim 1, characterized in that water is present in an amount of at least 15% by weight.
Claim 27
Dependent Claim
22 words
A coating composition according to claim 1, characterized in that water is present in an amount of at least 25% by weight.
Claim 28
Dependent Claim
23 words
A coating composition according to claim 1, characterized in that water is present in an amount of not more than 80% by weight.
Claim 29
Dependent Claim
28 words
A process of coating a substrate with an aqueous composition, characterized in that use is made of the composition according to any one of the preceding claims 1-27.
References Cited (Backward Citations)
FR2350385A1
Cited
EP0055477A2
Cited
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