Patent EP0484093A2 successfully refreshed from Google Patents.
EP0484093A2
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EP
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Polymer composition for forming release films
Assignee: Neste Oyj
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Filing: 1991-10-29
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Granted: —
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Expires: 2011-10-29
Abstract
Abstract The invention provides a polymer composition for forming release films for contact with surfaces containing pressure-sensitive adhesives, characterized in that it is formed of a reactive polyolefin containing functional groups and a reactive release substance, which have been caused to react by compounding in a molten state.
Inventors
- 👤 Christer Bergstrom
- 👤 Ake Jafs
- 👤 Stefan Jakobsson
- 👤 Inari Seppa
- 👤 Marja-Leena Markkula
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 20:27
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J7/00; C09J7/40; C09J7/405; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C09J2301/00; C09J2301/40; C09J2301/414; C09J2423/00; C09J2423/006; C09J2483/00; C09J2483/006
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
A polymer composition for forming release films for contact with surfaces containing pressure-sensitive adhesives, characterized in that it is formed of a reactive polyolefin containing functional groups and a reactive release substance, which have been caused to react by compounding in a molten state.
Claim 2
Dependent Claim
18 words
A composition according claim 1, characterized in that said polyolefin is a copolymer or graft polymer of ethylene.
Claim 3
Dependent Claim
33 words
A composition according to claim 1 or 2, characterized in that the reactive polyolefin is a polyolefin, to which compounds containing functional groups have been joined by copolymerizing, grafting or in another way.
Claim 4
Dependent Claim
25 words
A composition according to claim 3, characterized in that said functional groups are acid or acid anhydride, silane, hydroxy, epoxy, amino, ketene or isocyanate groups.
Claim 5
Dependent Claim
27 words
A composition according to any of the preceding claims, characterized in that the reactive release substance is a silicone, fatty acid compound or fluoropolymer containing functional groups.
Claim 6
Dependent Claim
29 words
A composition according to claim 5, characterized in that the functional groups of the release substance are silanol, carbinol, alkoxysilane, acid, amino, epoxy, hydrogen silane, ketene or isocyanate groups.
Claim 7
Dependent Claim
28 words
A composition according to claim 1, characterized in that the reaction has been achieved by condensation of silanol groups by means of water and a silanol condensation catalyst.
Claim 8
Dependent Claim
27 words
A composition according to claim 7, characterized in that the polyolefin is an ethylene-alkoxysilane co- or terpolymer and the release substance is a silicone containing silanol groups.
Claim 9
Dependent Claim
28 words
A composition according to claim 7, characterized in that the polyolefin is an ethylene-hydroxyalkyl-(meth)acrylate co- or terpolymer and the release substance is a release substance containing ketene groups.
Claim 10
Dependent Claim
28 words
A release film for contact with surfaces containing pressure-sensitive adhesives, characterized in that it contains a polymer composition according to claims 1-9 in the form of a film.
Claim 11
Dependent Claim
22 words
A release film according to claim 10, characterized in that it comprises a mixture of said polymer composition and an unmodified polyolefin.
Claim 12
Dependent Claim
32 words
A release film according to claim 10, characterized in that it comprises a polymer composition according to claims 1-9 coextruded on the surface of a film arterial not containing said polymer composition.
References Cited (Backward Citations)
No citation records indexed.
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