US4596744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxime blocked isocyanate cross-linker for cathodic electrocoat
Assignee: BASF Corp
•
Filing: 1985-01-29
•
Granted: 1986-06-24
•
Expires: 2005-01-29
Abstract
Abstract Oxime blocked polyisocyanate cross-linking agents for use with amine epoxy resin adducts in cathodic electrodeposition processes. The oxime blocking agents are the reaction products of acyclic aliphatic carbonyl-containing compounds having at least 7 carbon atoms and hydroxylamine. The oxime blocked polyisocyanates produce cathodic electrodeposited coatings which are smoother than coatings produced by oxime blocked polyisocyanates known in the art.
Inventors
- 👤 Terry L. Anderson
- 👤 Tapan K. Deb Roy
- 👤 Ding Y. Chung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:03
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4488; C09D5/4496; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/643; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/8077; C09D5/4419; C09D5/443; C09D5/4453; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
59 words
A cathodic electrodepositable resin composition comprising an amine-epoxy resin adduct and an oxime-blocked polyisocyanate cross-linking agent, wherein the improvement comprises using as the oxime the reaction product of an acyclic aliphatic carbonyl-containing compound having at least 7 carbon atoms and hydroxylamine, the composition curable after deposition at about 225° F. to about 275° F. to a durable, smooth film.
Claim 2
Dependent Claim
59 words
A cathodic electrodepositable resin composition comprising an amine-epoxy resin adduct and an oxime-blocked polyisocyanate cross-linking agent, wherein the improvement comprises using as the oxime the reaction product of an acyclic aliphatic carbonyl-containing compound having at least 7 carbon atoms and hydroxylamine, the composition curable after deposition at about 225° F. to about 275° F. to a durable, smooth film.
Claim 3
Dependent Claim
16 words
The cathodic electrodepositable resin composition of claim 1 wherein the carbonyl containing compound is a ketone.
Claim 4
Dependent Claim
16 words
The cathodic electrodepositable resin composition of claim 1 wherein the carbonyl containing compound is methyl-n-amyl ketone.
Claim 5
Dependent Claim
16 words
The cathodic electrodepositable resin composition of claim 1 wherein the carbonyl containing group is an aldehyde.
Claim 6
Dependent Claim
21 words
The cathodic electrodepositable resin of claim 1 in which the polyisocyanate is the reaction product of toluene diisocyanate and trimethylol propane.
Claim 7
Independent Claim
133 words
A method of depositing by cathodic electrodeposition a resin composition comprising an amine-containing epoxy resin and an oxime-blocked polyisocyanate cross-linking agent on a conductive article by salting the resin composition, forming an aqueous coating bath with the salted resin, connecting the article to a DC circuit so that the article serves as a cathode, immersing the article in the coating bath, passing a direct current through the article so that a coating of the resin composition is deposited on the article, removing the article from the bath and then curing the coating, the improvement comprising using as the oxime the reaction product of an aliphatic carbonyl-containing compound having at least 4 carbon atoms and hydroxylamine, the composition curable after deposition at about 225° F. to about 250° F. to a durable, smooth film.
Claim 8
Independent Claim
133 words
A method of depositing by cathodic electrodeposition a resin composition comprising an amine-containing epoxy resin and an oxime-blocked polyisocyanate cross-linking agent on a conductive article by salting the resin composition, forming an aqueous coating bath with the salted resin, connecting the article to a DC circuit so that the article serves as a cathode, immersing the article in the coating bath, passing a direct current through the article so that a coating of the resin composition is deposited on the article, removing the article from the bath and then curing the coating, the improvement comprising using as the oxime the reaction product of an aliphatic carbonyl-containing compound having at least 4 carbon atoms and hydroxylamine, the composition curable after deposition at about 225° F. to about 250° F. to a durable, smooth film.
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein the carbonyl-containing compound is a ketone.
Claim 10
Dependent Claim
12 words
The method of claim 6 wherein the carbonyl-containing compound is methyl-n-amyl ketone.
Claim 11
Dependent Claim
12 words
The method of claim 6 wherein the carbonyl-containing compound is an aldehyde.
Claim 12
Dependent Claim
18 words
The method of claim 6 wherein the polyisocyanate is the reaction product of toluene diisocyanate and trimethylol propane.
Claim 13
Dependent Claim
81 words
An aqueous cathodic electrodepositable coating bath comprising an acid solubilized amine-epoxy resin adduct and a cross-linking agent comprising an oxime blocked polyisocyanate, wherein the improvement comprises an oxime which is the reaction product of an acyclic aliphatic carbonyl-containing compound having at least 7 carbon atoms and hydroxylamine, wherein the amine-epoxy resin adduct and blocked polyisocyanate when deposited on a conductive article in a cathodic electrodeposition process is curable at about 225° F. to about 275° F. to a durable, smooth film.
Claim 14
Dependent Claim
81 words
An aqueous cathodic electrodepositable coating bath comprising an acid solubilized amine-epoxy resin adduct and a cross-linking agent comprising an oxime blocked polyisocyanate, wherein the improvement comprises an oxime which is the reaction product of an acyclic aliphatic carbonyl-containing compound having at least 7 carbon atoms and hydroxylamine, wherein the amine-epoxy resin adduct and blocked polyisocyanate when deposited on a conductive article in a cathodic electrodeposition process is curable at about 225° F. to about 275° F. to a durable, smooth film.
Claim 15
Dependent Claim
13 words
The coating bath of claim 11 wherein the carbonyl-containing compound is a ketone.
Claim 16
Dependent Claim
13 words
The coating bath of claim 11 wherein the carbonyl-containing compound is methyl-n-amyl ketone.
Claim 17
Dependent Claim
13 words
The coating bath of claim 11 wherein the carbonyl-containing compound is an aldehyde.
Claim 18
Dependent Claim
19 words
The coating bath of claim 11 wherein the polyisocyanate is the rection product of toluene diisocyanate and trimethylol propane.
Claim 19
Dependent Claim
142 words
A coated article coated with an electrodepositable coating composition, wherein the coating composition comprises an amine-epoxy resin adduct and an oxime-blocked polyisocyanate, the coated article produced by initially salting the resin adduct with an acid, solubilizing a sufficient amount of said composition in an aqueous coating bath containing an anode, connecting the article to a DC electric circuit to act as a cathode, immersing the article in the bath, passing a sufficient direct current across the article for a sufficient amount of time to produce a film of said composition, then removing the article from the bath and curing the film, wherein the improvement comprises using as the oxime the reaction produce of an acyclic aliphatic carbonyl-containing compound having at least 7 carbon atoms and hydroxylamine, the composition curable at about 225° F. to about 275° F. to a smooth, durable film.
Claim 20
Dependent Claim
142 words
A coated article coated with an electrodepositable coating composition, wherein the coating composition comprises an amine-epoxy resin adduct and an oxime-blocked polyisocyanate, the coated article produced by initially salting the resin adduct with an acid, solubilizing a sufficient amount of said composition in an aqueous coating bath containing an anode, connecting the article to a DC electric circuit to act as a cathode, immersing the article in the bath, passing a sufficient direct current across the article for a sufficient amount of time to produce a film of said composition, then removing the article from the bath and curing the film, wherein the improvement comprises using as the oxime the reaction produce of an acyclic aliphatic carbonyl-containing compound having at least 7 carbon atoms and hydroxylamine, the composition curable at about 225° F. to about 275° F. to a smooth, durable film.
Claim 21
Dependent Claim
13 words
The coated article of claim 16 wherein the carbonyl-containing compound is a ketone.
Claim 22
Dependent Claim
13 words
The coated article of claim 16 wherein the carbonyl-containing compound is methyl-n-amyl ketone.
Claim 23
Dependent Claim
13 words
The coated article of claim 16 wherein the carbonyl-containing compound is an aldehyde.
Claim 24
Dependent Claim
18 words
The coated article of claim 15 wherein the polyisocyanate is the reaction product of toluene diisocyanate and trimethylolpropane.
References Cited (Backward Citations)
US3984299A
Cited
US4031050A
Cited
US3947338A
Cited
US3922253A
Cited
US4101486A
Cited
US4139510A
Cited
US4134864A
Cited
US4137140A
Cited
US4093594A
Cited
US4182831A
Cited
US4225478A
Cited
US4225479A
Cited
US4339369A
Cited
US4419467A
Cited
US4468307A
Cited
US4507412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |