US4374898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric film
Assignee: EIDP Inc
•
Filing: 1981-06-25
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Granted: 1983-02-22
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Expires: 2001-06-25
Abstract
Abstract Ethylene/vinyl acetate copolymer film containing 35 to 50 percent copolymerized vinyl acetate by weight is irradiated with 0.5 to 16 megarads of high energy radiation, contacted with an alcoholic solution of a titanate or silane coupling agent, and subsequently contacted with an alcoholic finely divided mineral particulate slurry. The resulting film is elastomeric, heat sealable, transparent upon relaxation after being stretched and free of surface tack.
Inventors
- 👤 Tibor G. Mahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:19
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J5/00; C08J5/18; C08J7/04; C08J7/042; C08J7/0423; C08J7/052; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A process for treating ethylene/vinyl acetate copolymer film containing about 35 to 50 percent copolymerized vinyl acetate by weight, said ethylene/vinyl acetate being crosslinked as a result of being subjected to a 0.5 to 16 megarad dosage of high energy radiation, comprising: (a) contacting the film with an alcoholic solution, at 20°-80° C., containing at least 0.2 percent of a coupling agent selected from the group consisting of titanate and silane coupling agents so that the coupling agent is bonded to the surface of the film; and then (b) contacting the film of (a) with an alcoholic slurry containing at least 0.2 percent finely divided mineral particulates so that the mineral particles are bonded to the coupling agent.
Claim 2
Dependent Claim
118 words
A process for treating ethylene/vinyl acetate copolymer film containing about 35 to 50 percent copolymerized vinyl acetate by weight, said ethylene/vinyl acetate being crosslinked as a result of being subjected to a 0.5 to 16 megarad dosage of high energy radiation, comprising: (a) contacting the film with an alcoholic solution, at 20°-80° C., containing at least 0.2 percent of a coupling agent selected from the group consisting of titanate and silane coupling agents so that the coupling agent is bonded to the surface of the film; and then (b) contacting the film of (a) with an alcoholic slurry containing at least 0.2 percent finely divided mineral particulates so that the mineral particles are bonded to the coupling agent.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the size of the minerals of (b) is from 0.1 to 150 microns.
Claim 4
Dependent Claim
8 words
The product of the process of claim 1.
Claim 5
Dependent Claim
8 words
The product of the process of claim 2.
References Cited (Backward Citations)
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Cited
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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) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |