US4091166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron trifluoride coatings for thermoplastic materials and method of applying same in glow discharge
Assignee: National Aeronautics and Space Administration
•
Filing: 1977-06-17
•
Granted: 1978-05-23
•
Expires: 1997-06-17
Abstract
Abstract Plastic surfaces can be improved physically and optically by treating them with a plasma of boron trifluoride. The trifluoride can be the sole reactant or be part of a mixture also containing an organic monomeric substance such as perfluorobutene-2 or an organosilane. The boron trifluoride-containing coating can also serve as an intermediate coating between the plasticl surface and a plasma deposited organic polymer.
Inventors
- 👤 Ronald Michael Kubacki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:45
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/31909; Y10T428/31938
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
27 words
A method for depositing a single layer coating on a plastic substrate, comprising the step of subjecting the substrate to bombardment by boron trifluoride in plasma form.
Claim 2
Independent Claim
27 words
A method for depositing a single layer coating on a plastic substrate, comprising the step of subjecting the substrate to bombardment by boron trifluoride in plasma form.
Claim 3
Dependent Claim
42 words
A method of claim 1 wherein the boron trifluoride is employed at a pressure within the range of 9.3 to 20 N/m 2 and the plasma is maintained by a radio frequency voltage within the range of about 30 to 75 watts.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the boron trifluoride plasma comprises a nitrogen-containing gas.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the boron trifluoride plasma comprises an organic monomeric substance.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein the single layer coating obtained is further subjected to a plasma of an organic monomeric substance.
Claim 7
Dependent Claim
20 words
The method of claim 5 wherein the organic monomeric substance is selected from the group consisting of organosilanes and perfluorobutene-2.
Claim 8
Dependent Claim
16 words
The method of claim 6 wherein the coated substrate is further treated in a nitrogen plasma.
Claim 9
Dependent Claim
12 words
A plastic surface coated with a layer of plasma deposited boron trifluoride.
Claim 10
Dependent Claim
12 words
A plastic surface coated with a layer of plasma deposited boron trifluoride.
Claim 11
Dependent Claim
21 words
The boron trifluoride coated plastic surface of claim 8 which carries an outer layer of a plasma polymerized organic monomeric compound.
Claim 12
Dependent Claim
24 words
The plastic surface of claim 9 wherein the outer layer consists of a plasma polymerized mixture of an organic monomeric compound and boron trifluoride.
Claim 13
Dependent Claim
18 words
The plastic surface of claim 9 which has been subjected to a further treatment by a nitrogen plasma.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |