US4161564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating formulation, method, and coated substrate
Assignee: La Barge Inc
•
Filing: 1977-02-28
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Granted: 1979-07-17
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Expires: 1997-02-28
Abstract
Abstract A formulation which may be applied to a substrate to produce a flexible, high temperature, thermally stable and color stable film thereon. The formulation comprises a poly(1,3-imidazolidine-2,4,5-trione) polymer, a free radical scavenger in an amount sufficient to inhibit cleavage and cross-linking of the polymer by action of oxygen thereon, and a solvent for the polymer. Also disclosed are a method for applying a flexible, high temperature, thermally stable and color stable color coating to a polyimide substrate; the substrate so coated; and an insulated conductor assembly having a polyimide insulative cover and an imidazolidine trione based-top-coating over the cover.
Inventors
- 👤 Thomas J. Legbandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:14
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/16; H01B13/34; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01B7/00; H01B7/02; H01B7/0208; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2947; Y10T428/2949
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
An insulated conductor assembly comprising a conductor, a polyimide insulative cover surrounding said conductor, and over said cover a color coding topcoating comprising a poly(1,3-imidazolidine-2,4,5-trione) polymer, a coloring agent compatible with said imidazolidine-trione polymer, and a free radical scavenger in a proportion sufficient to inhibit cleavage and cross-linking of said imidazolidine-trione polymer by action of oxygen thereon.
Claim 2
Dependent Claim
57 words
An insulated conductor assembly comprising a conductor, a polyimide insulative cover surrounding said conductor, and over said cover a color coding topcoating comprising a poly(1,3-imidazolidine-2,4,5-trione) polymer, a coloring agent compatible with said imidazolidine-trione polymer, and a free radical scavenger in a proportion sufficient to inhibit cleavage and cross-linking of said imidazolidine-trione polymer by action of oxygen thereon.
Claim 3
Dependent Claim
27 words
An assembly as set forth in claim 1 wherein said top coating further comprises a reflectance enhancing filler having a refractive index of at least about 1.9.
Claim 4
Dependent Claim
29 words
An assembly as set forth in claim 2 wherein said filler is selected from the group consisting of glass beads, particulate titanium dioxide, particulate aluminum and particulate aluminum dioxide.
Claim 5
Dependent Claim
17 words
An assembly as set forth in claim 1 wherein said top coating further comprises a poly(arylether sulfone).
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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) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |