Patent US4380601A successfully refreshed from Google Patents.
US4380601A
Expired / Lapsed
US
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Thermosetting catonic acrylic latices and their use in coating compositions
Assignee: PPG Industries Inc
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Filing: 1981-09-25
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Granted: 1983-04-19
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Expires: 2001-09-25
Abstract
Abstract A cationic thermosetting latex, coating compositions prepared therefrom, and the process for providing a protective coating are disclosed. The thermosetting latex comprises a blocked isocyanate curing agent and a cationic acrylic latex which is prepared by copolymerizing ethylenically unsaturated monomers, at least one of which contains an active hydrogen group, in an acidic medium in the presence of a cationic surfactant, of which the gegen-ion is derived from certain phosphorous-containing acids. Such latices, when formulated into coating compositions, provide corrosion-resistant coatings.
Inventors
- 👤 David A. Welsh
- 👤 Rostyslaw Dowbenko
- 👤 Suryya K. Das
- 👤 Charles M. Kania
- 👤 Roger M. Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:57
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/28; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/066; C08L; C08L75/00; C08L75/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31605
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A stable thermosetting cationic acrylic latex composition, comprising a blocked isocyanate curing agent and a cationic acrylic latex; the cationic acrylic latex being prepared by a process which comprises copolymerizing ethylenically unsaturated monomers, at least one of which contains an active hydrogen group, in an acidic medium in the presence of water, a polymerization initiator and a cationic surfactant which has a gegen-ion derived from an acid selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous and alkyl or aryl hydrogen phosphate.
Claim 2
Dependent Claim
84 words
A stable thermosetting cationic acrylic latex composition, comprising a blocked isocyanate curing agent and a cationic acrylic latex; the cationic acrylic latex being prepared by a process which comprises copolymerizing ethylenically unsaturated monomers, at least one of which contains an active hydrogen group, in an acidic medium in the presence of water, a polymerization initiator and a cationic surfactant which has a gegen-ion derived from an acid selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous and alkyl or aryl hydrogen phosphate.
Claim 3
Dependent Claim
12 words
A thermosetting latex of claim 1, wherein the acid is hypophosphorous acid.
Claim 4
Dependent Claim
13 words
A thermosetting latex of claim 1, wherein the latex contains an amino group.
Claim 5
Dependent Claim
21 words
A thermosetting latex of claim 3, wherein the amino group is derived from an ethylenically unsaturated monomer containing an amino group.
Claim 6
Dependent Claim
12 words
A coating composition comprising the acrylic latex composition as in claim 1.
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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) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |