Patent US4851166A successfully refreshed from Google Patents.
US4851166A
Expired / Lapsed
US
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Process of producing an oriented silicone resin coated polymeric film
Assignee: Akzo Nobel Films Holding Ltd
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Filing: 1988-10-31
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Granted: 1989-07-25
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Expires: 2008-10-31
Abstract
Abstract The invention concerns the production of oriented polymeric films in which a layer of a heat curable silicone resin composition is formed on a layer of a polymeric film which is thereafter stretched at an elevated temperature to effect orientation of the film. The heat curable silicone resin composition includes a volatile inhibitor for inhibiting curing of the composition while stretching is effected. Suitable inhibitors include volatile amines, alkynes and acetylene alcohols. Films so produced can be used as release films.
Inventors
- 👤 Kenneth D. Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:15
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J2483/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
A process for the production of an oriented polymeric film which process comprises forming a layer of a heat curable silicone resin composition on a surface of a polymeric film and thereafter stretching the film at an elevated temperature to effect orientation of the film, the heat curable silicone composition including a volatile inhibitor for inhibiting curing of the composition while stretching is effected.
Claim 2
Dependent Claim
64 words
A process for the production of an oriented polymeric film which process comprises forming a layer of a heat curable silicone resin composition on a surface of a polymeric film and thereafter stretching the film at an elevated temperature to effect orientation of the film, the heat curable silicone composition including a volatile inhibitor for inhibiting curing of the composition while stretching is effected.
Claim 3
Dependent Claim
30 words
A process according to claim 1, wherein the volatile inhibitor is present in the composition in an amount sufficient to inhibit curing thereof until the said stretching is substantially complete.
Claim 4
Dependent Claim
22 words
A process according to claim 1, wherein the volatile inhibitor comprises a volatile amine, a volatile alkyne, or a volatile acetylene alcohol.
Claim 5
Dependent Claim
12 words
A process according to claim 3, wherein the volatile amine is mono-ethanolamine.
Claim 6
Dependent Claim
24 words
A process according to claim 3, wherein the heat curable silicone resin composition includes an organometallic catalyst for catalysing heat curing of the composition.
Claim 7
Dependent Claim
13 words
A process according to claim 5, wherein the catalyst is a platinum-containing compound.
Claim 8
Dependent Claim
25 words
A process according to claim 1, wherein the heat curable silicone of the composition comprises a dialkyl or alkyl aryl silicone fluid having vinyl functionality.
Claim 9
Dependent Claim
26 words
A process according to claim 7, wherein the composition contains a minor amount of an alkyl hydrogen or an aryl hydrogen silicone as a cross-linking agent.
Claim 10
Dependent Claim
35 words
A process according to claim 1, wherein the film is stretched to effect orientation in one direction before the heat curable silicone resin composition is applied and the film is thereafter oriented in another direction.
Claim 11
Dependent Claim
23 words
A process according to claim 1, wherein the film is subjected to a corona discharge treatment before the heat curable composition is applied.
Claim 12
Dependent Claim
17 words
A process according to claim 1, wherein the film is heat set after curing of the composition.
Claim 13
Dependent Claim
13 words
A process according to claim 1, wherein the film is a polypropylene film.
Claim 14
Dependent Claim
15 words
A process according to claim 1, wherein the polymeric film comprises two or more layers.
Claim 15
Dependent Claim
15 words
A process according to claim 1, wherein the polymeric film after stretching has voids therein.
References Cited (Backward Citations)
US3154461A
Cited
US4089997A
Cited
US4310600A
Cited
US4386135A
Cited
US4476166A
Cited
US4772515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |