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US4830722A
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Water-dilutable binders for cationic electrocoating finishes and a process for the preparation thereof
Assignee: BASF Farben und Fasern AG
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Filing: 1988-07-14
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Granted: 1989-05-16
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Expires: 2008-07-14
Abstract
Abstract The invention relates to a water-dilutable binder for cationic electrocoating finishes. For the preparation of the binders po0 (A) a di-epoxide compound with an epoxide equivalent weight below 2,000 is reacted with (B) a phenol- or thiol-containing compound which reacts monofunctionally with epoxide groups, and with (C) primary and/or secondary amines or their salts and/or the salt of a tertiary amine, a sulfide/acid mixture or phosphine/acid mixture or a mixture of these compounds, as well as, if desired, with (D) a polyfunctional alcohol, a polycarboxylic acid, a polysulfide or a polyphenol. The components A and B are used in a molar ratio of from 10:1 to 1:1, preferably from 4: to 1.5:1 and the reaction of the component A with the component B is carried out at 100° to 190° C., if desired in the presence of a catalyst.
Inventors
- 👤 Arnold Dobbelstein
- 👤 Michael Geist
- 👤 Gunther Ott
- 👤 Georg Schon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:25
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; C08; C08G; C08G59/00; C08G59/02; C08G59/14; C08G59/1433; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A process for the electrophoretic coating of an electrically conducting substrate connected as cathode by applying a direct current to electrodes placed in an aqueous bath which contains, besides the usual additives, water-dilutable cationic binders which have either been made self-crosslinkable by reaction or can be crosslinked by crosslinking agents present in the bath, wherein the binders are obtainable by reacting (A) a di-epoxide compound, or a mixture of di-epoxide compounds, having an epoxide equivalent weight below 2,000, with (B) a phenol- or thiol-containing compound which, under the given reaction conditions reacts monofunctionally with epoxide groups, or a mixture of such compounds, and with (C) primary and/or secondary amines or their salts and/or the salt of a tertiary amine, a sulfide/acid mixture or phosphine/acid mixture or a mixture of these compounds, as well as, if desired, with (D) a polyfunctional alcohol, a polycarboxylic acid, a polyamine, a polysulfide, a polyphenol or a mixture of these compounds the components A and B being used in a molar ratio from 10:1 to 1:1, preferably from 4:1 to 1.5:1, the reaction of component A with component B being carried out at 100° to 190° C., if desired in the presence of a catalyst, and, if further desired, the dilutability with water being obtained by protonization with a water-soluble acid.
Claim 2
Dependent Claim
216 words
A process for the electrophoretic coating of an electrically conducting substrate connected as cathode by applying a direct current to electrodes placed in an aqueous bath which contains, besides the usual additives, water-dilutable cationic binders which have either been made self-crosslinkable by reaction or can be crosslinked by crosslinking agents present in the bath, wherein the binders are obtainable by reacting (A) a di-epoxide compound, or a mixture of di-epoxide compounds, having an epoxide equivalent weight below 2,000, with (B) a phenol- or thiol-containing compound which, under the given reaction conditions reacts monofunctionally with epoxide groups, or a mixture of such compounds, and with (C) primary and/or secondary amines or their salts and/or the salt of a tertiary amine, a sulfide/acid mixture or phosphine/acid mixture or a mixture of these compounds, as well as, if desired, with (D) a polyfunctional alcohol, a polycarboxylic acid, a polyamine, a polysulfide, a polyphenol or a mixture of these compounds the components A and B being used in a molar ratio from 10:1 to 1:1, preferably from 4:1 to 1.5:1, the reaction of component A with component B being carried out at 100° to 190° C., if desired in the presence of a catalyst, and, if further desired, the dilutability with water being obtained by protonization with a water-soluble acid.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |