Patent US3947339A successfully refreshed from Google Patents.
US3947339A
Expired / Lapsed
US
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Method of electrodepositing primary amine group-containing cationic resins
Assignee: PPG Industries Inc
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Filing: 1975-02-05
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Granted: 1976-03-30
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Expires: 1995-02-05
Abstract
Abstract The pH, dispersibility and throw power of amine group-solubilized, epoxy resin-derived, cationic electrodepositable resins can be enhanced by the incorporation of primary amine groups into the resin molecule. The primary amine groups are incorporated by reacting certain polyamine compounds in which the primary amine groups are blocked by ketimine groups into the acid solubilizable, amine group-containing electrodepositable resins derived from epoxy group-containing resins.
Inventors
- 👤 Robert D. Jerabek
- 👤 Joseph R. Marchetti
- 👤 Robert R. Zwack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:07
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; C09D5/4438; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
In a method of electrocoating an electrically conductive surface serving as a cathode, which method comprises passing electrical current between said cathode and an anode in contact with an aqueous electrodepositable composition, the improvement wherein said electrodepositable composition comprises an acid-neutralized, amine group-solubilized synthetic organic resin, wherein said organic resin contains hydroxyl groups curable through urethane group crosslinking, wherein at least a portion of said amine groups are primary amine groups and wherein said organic resin is formed from a compound containing epoxy functionality, at least a portion of said epoxy functionality having been reacted with a polyamine, said polyamine having latent primary amine groups blocked by ketimine groups and having at least one secondary amine group.
Claim 2
Dependent Claim
117 words
In a method of electrocoating an electrically conductive surface serving as a cathode, which method comprises passing electrical current between said cathode and an anode in contact with an aqueous electrodepositable composition, the improvement wherein said electrodepositable composition comprises an acid-neutralized, amine group-solubilized synthetic organic resin, wherein said organic resin contains hydroxyl groups curable through urethane group crosslinking, wherein at least a portion of said amine groups are primary amine groups and wherein said organic resin is formed from a compound containing epoxy functionality, at least a portion of said epoxy functionality having been reacted with a polyamine, said polyamine having latent primary amine groups blocked by ketimine groups and having at least one secondary amine group.
Claim 3
Dependent Claim
78 words
A method according to claim 1, wherein said electrodepositable composition comprises: A. an acid-solubilized synthetic adduct of: 1. a primary or secondary amine, 2. a polyamine derivative having at least one latent primary amine group which is blocked by a ketimine group having a free secondary amine group, and 3. an epoxy-containing compound; B. a blocked polyisocyanate stable at ordinary room temperature in the presence of said synthetic adduct, and reactive with said synthetic adduct at elevated temperatures.
Claim 4
Dependent Claim
27 words
A method according to claim 2, wherein said polyamine derivative is a diketimine derived from one mole of diethylene triamine and 2 moles of methyl isobutyl ketone.
Claim 5
Dependent Claim
27 words
A method according to claim 2, wherein (A) and (B) are present in a ratio of about 0.5 to about 2.0 blocked isocyanate groups per hydroxyl group.
Claim 6
Dependent Claim
18 words
A method according to claim 2 in which the electrodepositable composition additionally comprises a catalyst for urethane formation.
Claim 7
Dependent Claim
132 words
A method, as in claim 1, wherein said electrodepositable resin comprises an acid neutralized, amine group solubilized synthetic organic resin wherein said resin contains hydroxyl groups, curable through urethane group crosslinking, wherein at least a portion of said amine groups are primary amine groups, wherein the resin contains blocked isocyanate groups stable at room temperature in the presence of hydroxyl and amine groups and reactive with hydroxyl groups at elevated temperatures; and wherein said organic resin is formed from a compound containing epoxy functionally by reacting the epoxy compound with an amine, at least a portion of which is a polyamine, said polyamine having latent primary amine groups blocked by ketimine groups and having one secondary amine group, and a semi-blocked isocyanate containing an average of about one free reactive isocyanate group.
Claim 8
Dependent Claim
24 words
A method according to claim 6 wherein there are present a ratio of about 0.5 to about 2.0 blocked isocyanate groups per hydroxyl group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |