US4035275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel pigment grinding vehicles
Assignee: PPG Industries Inc
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Filing: 1975-11-12
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Granted: 1977-07-12
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Expires: 1995-11-12
Abstract
Abstract It has been found that quaternary onium (e.g., ammonium, sulfonium, and phosphonium) salt group-containing epoxy resins are particularly useful as grinding media in preparing stable pigment disperions useful in water-dispersible coating systems, for example, electrodepositable compositions. The resins are prepared by reacting a material selected from the group consisting of amine salts, phosphine-acid mixtures, and sulfide-acid mixtures with a 1,2-epoxy group containing material wherein a ratio of at least about 0.4 equivalents of quaternary onium groups are produced per equivalent of epoxy group initially present. Preferably, the system contains at least a small amount of polyoxyalkylene glycol.
Inventors
- 👤 Lance C. Sturni
- 👤 Joseph F. Bosso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4488; C09D5/4492
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
In a method of electrocoating an electrically-conductive surface serving as a cathode in an electrical circuit comprising said cathode, an anode and an electrodepositable composition, said method comprising passing electric current between said cathode and said anode in contact with said electrodepositable composition, the improvement wherein said electrodepositable composition comprises: (A) a cationic electrodepositable resin; and (B) a stable aqueous pigment paste comprising: (1) 2 to 50 percent by weight based on weight of (2) of a water-dispersible cationic polymer produced by reacting a 1,2-epoxy group-containing material with a material selected from the group consisting of amine salts, phosphine-acid mixtures and sulfide-acid mixtures, said cationic polymer having a ratio of final quaternary onium salt groups to initial epoxide groups greater than about 0.4 to 1; and (2) a pigment dispersed therein.
Claim 2
Dependent Claim
131 words
In a method of electrocoating an electrically-conductive surface serving as a cathode in an electrical circuit comprising said cathode, an anode and an electrodepositable composition, said method comprising passing electric current between said cathode and said anode in contact with said electrodepositable composition, the improvement wherein said electrodepositable composition comprises: (A) a cationic electrodepositable resin; and (B) a stable aqueous pigment paste comprising: (1) 2 to 50 percent by weight based on weight of (2) of a water-dispersible cationic polymer produced by reacting a 1,2-epoxy group-containing material with a material selected from the group consisting of amine salts, phosphine-acid mixtures and sulfide-acid mixtures, said cationic polymer having a ratio of final quaternary onium salt groups to initial epoxide groups greater than about 0.4 to 1; and (2) a pigment dispersed therein.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the resin (A) is a polyamine or polyquaternary onium group-containing resin.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein the onium salt of said pigment is an ammonium salt.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein the ratio of final quaternary onium salt groups to initial epoxide groups in said pigment paste is greater than about 0.6 to 1.
References Cited (Backward Citations)
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Cited
US3937679A
Cited
US3799854A
Cited
US3947339A
Cited
US3894922A
Cited
US3793278A
Cited
US3925180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |