US3922253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-crosslinking cationic electrodepositable compositions
Assignee: PPG Industries Inc
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Filing: 1973-09-24
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Granted: 1975-11-25
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Expires: 1993-09-24
Abstract
Abstract It has been found that aqueous coating compositions comprising the reaction product of a partially-blocked organic polyisocyanate, an amine adduct of an epoxy group-containing resin and a catalyst for urethane formation can be electrodeposited. These compositions deposit on the cathode to provide coatings having excellent properties.
Inventors
- 👤 Robert D Jerabek
- 👤 Joseph R Marchetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; C09D5/4438
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A METHOD OF PREPARING AN ELECTRODEPOSITABLE RESIN WHICH COMPRISES REACTING: A. AN EPOXY GROUP-CONTAINING ORGANIC RESIN WITH: B. A PRIMARY OR SECONDARY AMINE, AND REACTING THE RESULTANT PRODUCT WITH C. A SEMI-BLOCKED ORGANIC POLYISOCYANATE CONTAINING AN AVERAGE OF ABOUT ONE FREE ISOCYANATE GROUP WHERE THE BLOCKED ISOCYANATE GROUPS ARE STABLE AT ORDINARY ROOM TEMPERATURE IN THE PRESENCE OF SAID PRODUCT, BUT REACTIVE WITH HYDROXYL GROUPS AT ELAVATED TEMPERATURES.
Claim 2
Independent Claim
68 words
A METHOD OF PREPARING AN ELECTRODEPOSITABLE RESIN WHICH COMPRISES REACTING: A. AN EPOXY GROUP-CONTAINING ORGANIC RESIN WITH: B. A PRIMARY OR SECONDARY AMINE, AND REACTING THE RESULTANT PRODUCT WITH C. A SEMI-BLOCKED ORGANIC POLYISOCYANATE CONTAINING AN AVERAGE OF ABOUT ONE FREE ISOCYANATE GROUP WHERE THE BLOCKED ISOCYANATE GROUPS ARE STABLE AT ORDINARY ROOM TEMPERATURE IN THE PRESENCE OF SAID PRODUCT, BUT REACTIVE WITH HYDROXYL GROUPS AT ELAVATED TEMPERATURES.
Claim 3
Independent Claim
71 words
A method of preparing an electrodepositable resin which comprises reacting: A. a hydroxyl group-containing epoxy resin with B. a semi-blocked organic polyisocyanate containing an average of about one free isocyanate group where the blocked isocyanate groups are stable at ordinary room temperature in the presence of said product, but reactive with hydroxyl groups at elevated temperatures; and further reacting the resultant epoxy group-containing product with: C. a primary or secondary amine.
Claim 4
Independent Claim
71 words
A method of preparing an electrodepositable resin which comprises reacting: A. a hydroxyl group-containing epoxy resin with B. a semi-blocked organic polyisocyanate containing an average of about one free isocyanate group where the blocked isocyanate groups are stable at ordinary room temperature in the presence of said product, but reactive with hydroxyl groups at elevated temperatures; and further reacting the resultant epoxy group-containing product with: C. a primary or secondary amine.
Claim 5
Dependent Claim
71 words
A synthetic organic resin containing amino groups, hydroxyl groups, and capped isocyanate groups, wherein said capped isocyanate groups are stable at room temperature in the presence of hydroxyl groups and amino groups and are reactive with hydroxyl groups or amino groups at elevated temperatures, wherein said organic resin is the reaction product of: A. an epoxy group-containing organic resin; B. a primary or secondary amine; and C. a partially-capped organic polyisocyanate.
Claim 6
Dependent Claim
71 words
A synthetic organic resin containing amino groups, hydroxyl groups, and capped isocyanate groups, wherein said capped isocyanate groups are stable at room temperature in the presence of hydroxyl groups and amino groups and are reactive with hydroxyl groups or amino groups at elevated temperatures, wherein said organic resin is the reaction product of: A. an epoxy group-containing organic resin; B. a primary or secondary amine; and C. a partially-capped organic polyisocyanate.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |