US4297265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone rubber coating material having reduced surface tension
Assignee: Tamko Roofing Products Inc
•
Filing: 1979-11-23
•
Granted: 1981-10-27
•
Expires: 1999-11-23
Abstract
Abstract An improved silicone rubber coating composition is the subject of the invention. A method of reducing the surface tension of cured silicone rubber compositions is also contemplated. By utilizing a silicone rubber polymer dissolved in a suitable solvent at 50-70% concentration, SiO 2 may be introduced into the composition. SiO 2 in a quantity of 90-110% by weight of the polymer solution is utilized. Pigment may be added at 1-2% of the total formula weight if desired. The silicone is preferably at least 95% pure with an average particle size of 9 microns or less.
Inventors
- 👤 Thomas O. Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:00
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/128; C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/01; D06N3/04; D06N3/10; D06N2205/00; D06N2205/10; D06N2205/20; D06N2209/00; D06N2209/08; D06N2209/0807; D06N2209/12; D06N2209/126; D06N2209/128; D06N2209/16; D06N2209/1685
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A composition for coating a substrate comprising: a first component comprising silicone rubber and a solvent therefor, said silicone rubber comprising between 50% and 70% by weight of said first component; and a second component comprising particulate SiO 2 having a particle size of less than 45 microns, said second component comprising 90 to 110% by weight of said first component.
Claim 2
Dependent Claim
61 words
A composition for coating a substrate comprising: a first component comprising silicone rubber and a solvent therefor, said silicone rubber comprising between 50% and 70% by weight of said first component; and a second component comprising particulate SiO 2 having a particle size of less than 45 microns, said second component comprising 90 to 110% by weight of said first component.
Claim 3
Dependent Claim
16 words
A composition as set forth in claim 1, wherein said first component comprises RTV silicone rubber.
Claim 4
Dependent Claim
15 words
A composition as set forth in claim 2, wherein said solvent comprises an aliphatic hydrocarbon.
Claim 5
Dependent Claim
27 words
A composition as set forth in claim 2, wherein is included a quantity of pigment comprising about 1-2% by weight of the total of the other components.
Claim 6
Dependent Claim
22 words
A composition as set forth in claim 2, wherein said RTV silicone rubber has a specific gravity of about 1.02 to 1.08.
Claim 7
Dependent Claim
21 words
A composition as set forth in claim 2, wherein said SiO 2 has a specific gravity of about 2.5 to 2.8.
Claim 8
Independent Claim
46 words
A method of reducing the surface tension of a silicone rubber coating composition comprising incorporating into the composition a quantity of particulate SiO 2 having a particle size of less than 45 microns, said quantity comprising between 90 and 110% by weight of said silicone rubber.
Claim 9
Independent Claim
46 words
A method of reducing the surface tension of a silicone rubber coating composition comprising incorporating into the composition a quantity of particulate SiO 2 having a particle size of less than 45 microns, said quantity comprising between 90 and 110% by weight of said silicone rubber.
Claim 10
Dependent Claim
39 words
A method as set forth in claim 7, wherein said silicone rubber comprises an RTV silicone and an aliphatic hydrocarbon solvent therefor, said RTV silicone being present in said solvent in a quantity of at least 50% by weight.
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |