US4557887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing thin silicone elastomeric films
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1983-06-15
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Granted: 1985-12-10
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Expires: 2003-06-15
Abstract
Abstract Silicone elastomeric films of 1 to 500 microns can be made by coating an addition-curable or dehydrocondensation-curable silicone elastomer composition on a coated paper which has a peeling resistance of no more than 50 g/cm, curing the composition, and then peeling the film from the coated paper. These thin silicone elastomeric films can be used for gas separation.
Inventors
- 👤 Isao Ona
- 👤 Masaru Ozaki
- 👤 Katsutoshi Usui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29D; B29D7/00; B29D7/01; B29L; B29L2031/00; B29L2031/755; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A method for producing a thin silicone elastomeric film comprising coating an addition-curable or dehydrocondensation-curable fluid silicone elastomer composition on a coated paper which has a peeling resistance of the cured silicone elastomer from the coated paper surface of no more than 50 g/cm at 25° C. at a peeling rate of 30 cm/min and a peeling angel of 180°, curing the resulting coating of silicone elastomer composition which is on the coated paper, and thereafter peeling the resulting thin silicone elastomeric film from the coated paper to obtain a 1 to 500μ thick silicone elastomeric film.
Claim 2
Independent Claim
97 words
A method for producing a thin silicone elastomeric film comprising coating an addition-curable or dehydrocondensation-curable fluid silicone elastomer composition on a coated paper which has a peeling resistance of the cured silicone elastomer from the coated paper surface of no more than 50 g/cm at 25° C. at a peeling rate of 30 cm/min and a peeling angel of 180°, curing the resulting coating of silicone elastomer composition which is on the coated paper, and thereafter peeling the resulting thin silicone elastomeric film from the coated paper to obtain a 1 to 500μ thick silicone elastomeric film.
Claim 3
Dependent Claim
34 words
The method in accordance with claim 1 in which the coated paper is coated with an addition-curable silicone elastomer composition comprising a polyorganosiloxane possessing aliphatically unsaturated organic groups, polyorganohydrogensiloxane, and a platinum-group compound catalyst.
Claim 4
Dependent Claim
46 words
The method in accordance with claim 2 in which the composition is an organic solvent dispersion, the polyorganosiloxane is a vinyl terminated polydiorganosiloxane gum having dimethylsiloxane units and methylvinylsiloxane units, the polyorganohydrogensiloxane is a trimethylsilyl terminated polymethylhydrogensiloxane, and the platinum-group compound catalyst is a platinum compound.
Claim 5
Dependent Claim
55 words
The method in accordance with claim 3 in which the composition is continuously knife coated on triacetylcellulose coated glassine paper, warm air evaporates the organic solvent from the composition, and the resulting knife coated paper is heated to cure the composition to make the thin silicone elastomeric film which is peeled from the coated paper.
Claim 6
Dependent Claim
30 words
The method in accordance with claim 4 in which the thin silicone elastomeric film is sprayed with talc powder or mica powder as it is peeled from the coated paper.
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |