US4647604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-curable coating agent and its use
Assignee: BASF SE
•
Filing: 1985-06-13
•
Granted: 1987-03-03
•
Expires: 2005-06-13
Abstract
Abstract The heat-curable coating agent according to the invention contains a combination of a binder, which possesses basic nitrogen groups and is rendered water-dilutable by protonation with an acid, and a crosslinking agent and, if required, pigments, fillers, corrosion inhibitors, surface coating assistants and catalysts, and the binder used is a reaction product of a dicarboxylic acid or of a dicarboxylate or of a (meth)acrylate oligomer or polymer with an adduct of a di- or triglycidyl ether and a polyamine, the polyamine containing 2 or more amine nitrogen atoms per molecule and one or more alkylene chains of 3 or more carbon atoms between the amino groups, and has an NH amine number of from 50 to 150 mg of KOH/g and is combined with aminoplasts and/or phenoplasts as crosslinking agents. The novel coating agent is useful as a binder for the cathodic electrocoating of metal articles.
Inventors
- 👤 Fritz E. Kempter
- 👤 Harro Petersen
- 👤 Eberhard Schupp
- 👤 Gunther Sabelus
- 👤 Horst Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
235 words
A heat-curable coating agent which comprises in combination: a binder, which possesses basic nitrogen groups and can be rendered water-dilutable by protonation with an acid, and a crosslinking agent, and optionally pigments, fillers, corrosion inhibitors, catalysts, antioxidants and surfactants and organic solvents in an amount of not more than 40%, based on the total weight of the coating agent, wherein the binder containing basic nitrogen groups is a reaction product of a dicarboxylic acid and/or a dicarboxylate, the dicarboxylic acid or dicarboxylic acid ester being optionally partially replaced by a monocarboxylic acid and/or a moncarboxylate, or of a (meth) acrylate oligomer or polymer with an adduct which is the reaction product of a di- or triglycidyl ether and a polyamine, the latter containing 2 or more amine nitrogen atoms per molecule and one or more alkylene chains of not less than 3 carbon atoms between the amino groups, with the proviso that from 2 to 10 NH equivalents of the polyamine are employed per epoxide equivalent of the di- or triglycidyl ether for the preparation of the di- or triglycidyl ether/polyamine adduct, and the binder possessing basic nitrogen groups has an NH amine number of from 50 to 150 mg of KOH/g and a viscosity of from 1 to 6, mPa.s, measured at 150° C. on an isodencanol solution having a solids content of 88±1%, and is combined with aminoplasts and/or phenoplasts as crosslinking agents.
Claim 2
Dependent Claim
235 words
A heat-curable coating agent which comprises in combination: a binder, which possesses basic nitrogen groups and can be rendered water-dilutable by protonation with an acid, and a crosslinking agent, and optionally pigments, fillers, corrosion inhibitors, catalysts, antioxidants and surfactants and organic solvents in an amount of not more than 40%, based on the total weight of the coating agent, wherein the binder containing basic nitrogen groups is a reaction product of a dicarboxylic acid and/or a dicarboxylate, the dicarboxylic acid or dicarboxylic acid ester being optionally partially replaced by a monocarboxylic acid and/or a moncarboxylate, or of a (meth) acrylate oligomer or polymer with an adduct which is the reaction product of a di- or triglycidyl ether and a polyamine, the latter containing 2 or more amine nitrogen atoms per molecule and one or more alkylene chains of not less than 3 carbon atoms between the amino groups, with the proviso that from 2 to 10 NH equivalents of the polyamine are employed per epoxide equivalent of the di- or triglycidyl ether for the preparation of the di- or triglycidyl ether/polyamine adduct, and the binder possessing basic nitrogen groups has an NH amine number of from 50 to 150 mg of KOH/g and a viscosity of from 1 to 6, mPa.s, measured at 150° C. on an isodencanol solution having a solids content of 88±1%, and is combined with aminoplasts and/or phenoplasts as crosslinking agents.
Claim 3
Dependent Claim
28 words
A coating agent as set forth in claim 1, wherein the polyamine used for the preparation of the di- or triglycidyl ether/polyamine adduct is n-hexane-1,6-diamine, 4,7-dioxadecane-1,10-diamine or 4,9-dioxadodecane-1,12-diamine.
Claim 4
Dependent Claim
32 words
A coating agent as set forth in claim 1, wherein a dimerized fatty acid is used as the dicarboxylic acid and/or dicarboxylate for the preparation of the binder possessing basic nitrogen groups.
Claim 5
Dependent Claim
27 words
A coating agent as set forth in claim 1, wherein the binder possessing basic nitrogen groups contains sulfonate groups in an amount of from 0.05 to 3%.
Claim 6
Dependent Claim
61 words
A coating agent as set forth in claim 1, wherein the crosslinking agent used is a highly etherified aminoplast resin having a low methylol content, and the phenoplast resin employed is a methylolated phenol which is etherified at the phenolic OH group with allyl alcohol, or a methylolated mono-, di- or polyphenol, some or all of whose methylol groups are etherified.
Claim 7
Dependent Claim
28 words
A method for the cathodic electrocoating of metal articles, wherein the binder used is a heat-curable coating agent as defined in claim 1, after protonation with an acid.
Claim 8
Dependent Claim
28 words
A method for the cathodic electrocoating of metal articles, wherein the binder used is the heat-curable coating agent as claimed in claim 1, after protonation with an acid.
Claim 9
Dependent Claim
16 words
The method of claim 6, wherein the heat-curable coating agent is as defined in claim 2.
Claim 10
Dependent Claim
16 words
The method of claim 6, wherein the heat-curable coating agent is as defined in claim 3.
Claim 11
Dependent Claim
16 words
The method of claim 6, wherein the heat-curable coating agent is as defined in claim 4.
Claim 12
Dependent Claim
16 words
The method of claim 6, wherein the heat-curable coating agent is as defined in claim 5.
References Cited (Backward Citations)
US3716402A
Cited
US4064090A
Cited
US4093594A
Cited
US4212779A
Cited
US4252703A
Cited
US4568709A
Cited
US4565838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |