Patent US3894922A successfully refreshed from Google Patents.
US3894922A
Expired / Lapsed
US
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Electrodeposition method utilizing quaternary phosphonium group-containing resins
Assignee: PPG Industries Inc
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Filing: 1974-04-03
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Granted: 1975-07-15
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Expires: 1994-04-03
Abstract
Abstract Synthetic resins containing quaternary phosphonium base groups are prepared by reacting an epoxy group-containing material with a phosphine in the presence of an acid. The resins may contain epoxy groups or they may be essentially epoxy-group free, and may optionally contain oxyalkylene groups. When dispersed in water, the aqueous dispersion preferably contains boron. The resultant dispersion can be applied to a wide variety of substrates by electrodeposition and will deposit on the cathode to provide coatings of unique properties, including high resistance to corrosion and staining.
Inventors
- 👤 Joseph F Bosso
- 👤 Marco Wismer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:47
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4064; C08G59/4071; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; C09D5/4442
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
IN A METHOD OF COATING A CONDUCTIVE SUBSTRATE SERVING AS A CATHODE, WHICH METHOD COMPRISES PASSING ELECTRIC CURRENT BETWEEN AN ANODE AND SAID CATHODE IN ELECTRICAL CONTACT WITH A WATER-DISPERSED COMPOSITION, THE IMPROVEMENT WHEREIN THE WATER-DISPERSED COMPOSITION IS A WATER-DISPERSIBLE, QUATERNARY PHOSPHONIUM SALT-CONTAINING RESIN COMPRISING THE REACTION PRODUCT OF: A. AN EPOXY GROUP-CONTAINING ORGANIC MATERIAL, AND B. A PHOSPHINE-ACID MIXTURE, SAID PHOSPHINE-ACID MIXTURE REACTED WITH SAID ORGANIC MATERIAL IN AN AMOUNT AND AT A TEMPERATURE SUFFICIENT TO PROVIDE A QUATERNARY PHOSPHONIUM SALT-CONTAINING, WATER-DISPERSIBLE RESIN.
Claim 2
Dependent Claim
84 words
IN A METHOD OF COATING A CONDUCTIVE SUBSTRATE SERVING AS A CATHODE, WHICH METHOD COMPRISES PASSING ELECTRIC CURRENT BETWEEN AN ANODE AND SAID CATHODE IN ELECTRICAL CONTACT WITH A WATER-DISPERSED COMPOSITION, THE IMPROVEMENT WHEREIN THE WATER-DISPERSED COMPOSITION IS A WATER-DISPERSIBLE, QUATERNARY PHOSPHONIUM SALT-CONTAINING RESIN COMPRISING THE REACTION PRODUCT OF: A. AN EPOXY GROUP-CONTAINING ORGANIC MATERIAL, AND B. A PHOSPHINE-ACID MIXTURE, SAID PHOSPHINE-ACID MIXTURE REACTED WITH SAID ORGANIC MATERIAL IN AN AMOUNT AND AT A TEMPERATURE SUFFICIENT TO PROVIDE A QUATERNARY PHOSPHONIUM SALT-CONTAINING, WATER-DISPERSIBLE RESIN.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said reaction product contains epoxy groups.
Claim 4
Dependent Claim
14 words
The method of claim 1, wherein said reaction product is essentially epoxy group free.
Claim 5
Dependent Claim
33 words
The method of claim 1 wherein said reaction product contains in the resin molecule at least about 0.1 percent by weight of chemically-bound phosphorous in the form of a quaternary phosphonium base salt.
Claim 6
Dependent Claim
28 words
The method of claim 4 wherein said quaternary phosphonium base salt is the salt of an acid having a dissociation constant greater than about 1 X 10 5.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said organic material is a polyglycidyl ether of a polyphenol.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the aqueous dispersion further contains boric acid.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said quaternary phosphonium salt-containing resin contains oxyalkylene groups.
Claim 10
Dependent Claim
15 words
The method of claim 1 wherein said salt is the salt of an organic acid.
Claim 11
Dependent Claim
16 words
The method of claim 1 wherein said reaction product cOntains chemically-bound boron in the resin molecule.
Claim 12
Dependent Claim
35 words
The method of claim 1, wherein said reaction product contains in the resin molecule from about 0.1 to about 35 percent by weight of chemically-bound phosphorous in the form of a quaternary phosphonium base salt.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |