US4536558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain extended epoxy-ester polymeric compositions for cationic electrodeposition
Assignee: EIDP Inc
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Filing: 1983-12-27
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Granted: 1985-08-20
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Expires: 2003-12-27
Abstract
Abstract This invention relates to water dispersible, cathodically electrodepositable resins which are prepared by reacting chain extended polyepoxides with secondary amines. The polyepoxides have been chain extended with polycarboxylic acids. The resin is dispersible in water with the aid of a water soluble acid to provide cationic groups in the resin. Preferred crosslinking agents for the resin comprises capped isocyanates which may be either incorporated in the resin or preferably co-deposited with the resin from the coating composition bath.
Inventors
- 👤 Panagiotis I. Kordomenos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G59/02; C08G59/12; C08G59/50; C08G59/56; C08G59/58; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4423; C09D5/4426; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
130 words
A water dispersible, cathodically electrodepositable resin characterized in that said resin comprises the reaction product of: (A) epoxide functional esters formed by chain extending (a) polyepoxide having, on average, at least two epoxide group per molecule and a molecular weight of at least 350; with (b) polycarboxylic acid bearing at least two carboxyl groups per molecule, wherein said polyepoxide and said polycarboxylic acid are reacted in amounts which provide between about 0.1 and about 0.8 acid groups per epoxide group; and (B) secondary amines, wherein said ester and said amines are reacted in amounts sufficient to react essentially all of said epoxide groups of said ester with said amines, said reaction product being dispersible in water with the aid of water soluble acid to provide cationic groups in said resin.
Claim 2
Dependent Claim
130 words
A water dispersible, cathodically electrodepositable resin characterized in that said resin comprises the reaction product of: (A) epoxide functional esters formed by chain extending (a) polyepoxide having, on average, at least two epoxide group per molecule and a molecular weight of at least 350; with (b) polycarboxylic acid bearing at least two carboxyl groups per molecule, wherein said polyepoxide and said polycarboxylic acid are reacted in amounts which provide between about 0.1 and about 0.8 acid groups per epoxide group; and (B) secondary amines, wherein said ester and said amines are reacted in amounts sufficient to react essentially all of said epoxide groups of said ester with said amines, said reaction product being dispersible in water with the aid of water soluble acid to provide cationic groups in said resin.
Claim 3
Dependent Claim
12 words
A resin according to claim 1, wherein said polyepoxide is a diepoxide.
Claim 4
Dependent Claim
17 words
A resin according to claim 2, wherein said epoxide groups of said diepoxide are terminal epoxide groups.
Claim 5
Dependent Claim
20 words
A resin according to claim 1, wherein said polyepoxide has a molecular weight of between about 350 and about 2000.
Claim 6
Dependent Claim
13 words
A resin according to claim 1, wherein said polycarboxylic acid comprises dicarboxylic acid.
Claim 7
Dependent Claim
24 words
A resin according to claim 5, wherein said dicarboxylic acid is aliphatic dimer acid which contains between about 8 and about 44 carbon atoms.
Claim 8
Dependent Claim
16 words
A resin according to claim 5, wherein said polycarboxylic acid comprises at least 50% dicarboxylic acid.
Claim 9
Dependent Claim
31 words
A resin according to claim 1, wherein said polycarboxylic acid and said polyepoxide are reacted in amounts which provide between about 0.4 and about 0.6 carboxylic acid groups per epoxide group.
Claim 10
Dependent Claim
27 words
A resin according to claim 8, wherein said polycarboxylic acid and said polyepoxide are reacted in amounts which provide about 0.5 carboxylic acid groups per epoxide group.
Claim 11
Dependent Claim
24 words
A resin according to claim 1, wherein said epoxide functional esters, prior to being reacted with said amines, are reacted with partially blocked isocyanate.
Claim 12
Dependent Claim
36 words
A resin according to claim 10 wherein said partially blocked isocyanate is reacted with said epoxide functional ester in an amount which provides at least about 0.1 to about 1 urethane groups for each active hydrogen.
Claim 13
Dependent Claim
27 words
A cathodically electrodepositable coating composition, characterized in that it comprises an aqueous dispersion of said resin of claim 1 dispersed in water with the aid of acid.
Claim 14
Dependent Claim
21 words
A cathodically electrodepositable coating composition according to claim 12, wherein said composition further comprises a crosslinking agent comprising fully capped isocyanates.
Claim 15
Dependent Claim
38 words
A cathodically electrodepositable coating composition according to claim 13, wherein said fully capped isocyanate is present in said coating composition in an amount which provides at least about 0.1 to about 1.0 urethane groups for each active hydrogen.
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |