US3874903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resins
Assignee: Reichhold Albert Chemie AG
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Filing: 1972-03-29
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Granted: 1975-04-01
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Expires: 1992-03-29
Abstract
Abstract An article of manufacture comprising a substrate which is coated with a primer and a second coating adhering to the primer. The primer comprising as an essential ingredient an epoxy resin modified by acetoacetic ester groups which may also contain chemically bound metal atoms as a chelate. The cover layer contains a homo- or a copolymer of a fluorine-containing vinyl monomer having up to two fluorine atoms or a combination of such polymers.
Inventors
- 👤 Thaddaus Wirth
- 👤 Joachim Peter
- 👤 Walter Sprenger
- 👤 Jurgen Ritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/3154; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
AN ARTICLE OF MANUFACTURE COMPRISING: A. A SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF METALS, WOOD, CERAMIC, GLASS CEMENT, CONCRETE, AND SYNTHETIC RESINS, AND B. A FIRST COATING WHICH IS A PRIMER ADHERING TO THE SUBSTRATE WHEREIN THE FIRST COATING CONSISTS ESSENTIALLY OF A COMPONENT SELECTED FROM THE GROUP CONSISTING OF A. AN EPOXY RESIN MODIFIED BY ACETOACETIC ESTER GROUPS, B. AN EPOXY RESIN AS UNDER (A) IN COMBINATION WITH A SUITABLE HARDENING AGENT, C. AN EPOXY RESIN AS UNDER (A) IN COMBINATION WITH AT LEAST ONE ADDITIVE SELECTED FROM THE GROUP CONSISTING OF FILLERS, PIGMENTS, DYES, LUBRICANTS, SUSPENDING AGENTS AND SOLVENTS, D. AN EPOXY RESIN AS UNDER (A) IN COMBINATION WITH AT LEAST ONE OTHER RESIN SELECTED FROM THE GROUP CONSISTING OF EPOXY, ALKYD, POLYESTER, PHENOLIC AND AMINO RESINS, POLYURETHANES, POLYAMINOIMIDE RESINS, POLYMERISATION RESINS SELECTED FROM THE GROUP CONSISTING OF (D1) HYDROCARBON RESINS, (D2) ACRYLIC RESINS, E. A COMBINATION OF AT LEAST TWO OF (A) TO (D), WHEREIN THE EPOXY RESIN (A) IS PRESENT IN AN AMOUNT OF AT LEAST 20 PER CENT BY WEIGHT, REFERRED TO THE TOTAL SOLIDS CONTENT, AND C. A SECOND COATING WHEREIN THE SECOND COATING IS A POLYMER OF A FLUORINE-CONTAINING VINYL MONOMER.
Claim 2
Dependent Claim
199 words
AN ARTICLE OF MANUFACTURE COMPRISING: A. A SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF METALS, WOOD, CERAMIC, GLASS CEMENT, CONCRETE, AND SYNTHETIC RESINS, AND B. A FIRST COATING WHICH IS A PRIMER ADHERING TO THE SUBSTRATE WHEREIN THE FIRST COATING CONSISTS ESSENTIALLY OF A COMPONENT SELECTED FROM THE GROUP CONSISTING OF A. AN EPOXY RESIN MODIFIED BY ACETOACETIC ESTER GROUPS, B. AN EPOXY RESIN AS UNDER (A) IN COMBINATION WITH A SUITABLE HARDENING AGENT, C. AN EPOXY RESIN AS UNDER (A) IN COMBINATION WITH AT LEAST ONE ADDITIVE SELECTED FROM THE GROUP CONSISTING OF FILLERS, PIGMENTS, DYES, LUBRICANTS, SUSPENDING AGENTS AND SOLVENTS, D. AN EPOXY RESIN AS UNDER (A) IN COMBINATION WITH AT LEAST ONE OTHER RESIN SELECTED FROM THE GROUP CONSISTING OF EPOXY, ALKYD, POLYESTER, PHENOLIC AND AMINO RESINS, POLYURETHANES, POLYAMINOIMIDE RESINS, POLYMERISATION RESINS SELECTED FROM THE GROUP CONSISTING OF (D1) HYDROCARBON RESINS, (D2) ACRYLIC RESINS, E. A COMBINATION OF AT LEAST TWO OF (A) TO (D), WHEREIN THE EPOXY RESIN (A) IS PRESENT IN AN AMOUNT OF AT LEAST 20 PER CENT BY WEIGHT, REFERRED TO THE TOTAL SOLIDS CONTENT, AND C. A SECOND COATING WHEREIN THE SECOND COATING IS A POLYMER OF A FLUORINE-CONTAINING VINYL MONOMER.
Claim 3
Dependent Claim
28 words
An article of manufacture according to claim 1 in which the epoxy resin content of the primer is 20 to 100% by weight based on the solids content.
Claim 4
Dependent Claim
27 words
An article of manufacture according to claim 1 wherein the epoxy resin of the primer contains at least 0.2 acetoacetic ester groups per 1,000 molecular weight units.
Claim 5
Dependent Claim
61 words
An article of manufacture according to claim 1 wherein the epoxy resin of the primer contains at most 0.9 acetoacetic ester groups per 1,000 molecular weight units when having an average molecular weight of from 350 to 500 and at most 2.5 acetoacetic ester groups per 1,000 molecular weight units when having an average molecular weight of from 900 to 1,400.
Claim 6
Dependent Claim
41 words
An article of manufacture according to claim 1 wherein in the primer containing epoxy resin metal valencies which are not bound to the epoxy resin are bound to a beta-dicarbonyl compound or to hydrocarbon radicals having 2 to 8 carbon atoms.
Claim 7
Dependent Claim
64 words
An article of manufacture according to claim 1 wherein in the primer containing epoxy resin the epoxy resin has been modified by reaction of at least some of said acetoacetic ester groups (a) with formaldehyde and an amine to form a Mannich base; or (b) with an aldehyde to form alkylol groups; or (c) with an amine to form beta-amino crotonic acid ester groups.
Claim 8
Dependent Claim
77 words
An article of manufacture of claim 1 comprising: A. a metal substrate, and B. a first coating adhering to the substrate, wherein the first coating is a modified epoxy resin, wherein the epoxy resin is the reaction product of 4,4''-diphenylolpropane and epichlorohydrin, wherein the modified epoxy resin contains from 0.2 to 2.5 acetoacetic ester groups per 1,000 molecular weight units, and C. a second coating adhering to the first coating wherein the second coating is polyvinylidene fluoride.
Claim 9
Dependent Claim
58 words
An article of manufacture according to claim 1 wherein in the primer containing epoxy resin said epoxy resin contains chemically bound atoms of at least one chelate forming metal from Groups I to VI or Ia to VIIIa of the Periodic Table according to Meyer and Mendelejeff which metal atoms are at least partially bound as a chelate.
Claim 10
Dependent Claim
45 words
An article of manufacture according to claim 1 in which the epoxy resin of the primer containing epoxy resin is present in a combination with fillers and pigments the content of the two latter is up to 60% by weight based on the solids content.
References Cited (Backward Citations)
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US3435981A
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |