US4084035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adhesive polyester films of a copolymer of vinyl acetate and maleate diester
Assignee: Rhone Poulenc Industries SA
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Filing: 1977-01-13
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Granted: 1978-04-11
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Expires: 1997-01-13
Abstract
Abstract Polyester films which are self-adhesive under pressure are provided, said films having, on one face thereof, an adhesive layer which comprises a copolymer of vinyl acetate and a maleate ester of an aliphatic alcohol having 4 to 10 carbon atoms. These films have the advantage that they can be rolled up and then unrolled without the adhesive layer becoming detached.
Inventors
- 👤 Rene Arpin
- 👤 Philippe Tissot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:47
CPC Classifications
C; C09; C09J; C09J135/00; C09J135/02; C09J131/00; C09J131/02; C09J131/04; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2843; Y10T428/2852; Y10T428/2878; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31924; Y10T428/31928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A self-adhesive film comprising a support layer in the form of a film of a saturated polyester having, on one face thereof, an adhesive layer which comprises a copolymer of vinyl acetate and a maleate diester of an aliphatic alcohol having 4 to 10 carbon atoms, said copolymer containing 40 to 65% by weight of vinyl acetate units and, correspondingly, 60 to 35% by weight of units of the maleate diester and having a softening point of from 70° to 110° C. and a specific viscosity, measured at 20° C. on a 0.5% by weight solution in cyclohexanone, of from 35 to 65 ml/g.
Claim 2
Dependent Claim
104 words
A self-adhesive film comprising a support layer in the form of a film of a saturated polyester having, on one face thereof, an adhesive layer which comprises a copolymer of vinyl acetate and a maleate diester of an aliphatic alcohol having 4 to 10 carbon atoms, said copolymer containing 40 to 65% by weight of vinyl acetate units and, correspondingly, 60 to 35% by weight of units of the maleate diester and having a softening point of from 70° to 110° C. and a specific viscosity, measured at 20° C. on a 0.5% by weight solution in cyclohexanone, of from 35 to 65 ml/g.
Claim 3
Dependent Claim
28 words
A self-adhesive film according to claim 1, wherein the adhesive layer also contains a tackifying agent selected from an elastomer consisting of styrene/butadiene, a colophony resin and polyisobutene.
Claim 4
Dependent Claim
33 words
A self-adhesive film according to claim 2, wherein the adhesive layer comprises 40 to 99% by weight of the copolymer and 1 to 60% by weight of the elastomer and/or the said resin.
Claim 5
Dependent Claim
16 words
A self-adhesive film according to claim 1, wherein the support layer is of polyethylene glycol terephthalate.
Claim 6
Dependent Claim
14 words
A self-adhesive film according to claim 1, wherein the maleate ester is 2-ethyl-hexyl maleate.
Claim 7
Dependent Claim
22 words
A self-adhesive film according to claim 1, wherein the other face of the support layer is covered with a non-stick silicone coating.
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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |