Primer coating for polyolefin-backed tapes
AssigneeIntertape Polymer Group
InventorsRichard St. Coeur, William E. Hatfield, John Tynan
Life of this patent
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Abstract
A primer coating composition for use in polyolefin-backed pressure sensitive tape comprising a maleic anhydride modified chlorinated polyolefin covalently bonded to a maleic anhydride modified A-B-A block copolymer, where A is a thermoplastic polystyrene and B is a rubber midblock, by means of a crosslinking agent capable of reacting with the maleic anhydride functional groups in said polyolefin and said block copolymer a polyolefin-backed pressure sensitive tape employing the primer coating composition; and a method for manufacturing a polyolefin-backed pressure sensitive tape employing the primer coating composition are described.
Claims28
A primer coating composition for use in polyolefin-backed pressure sensitive adhesive tape, said composition comprising a maleic anhydride functionalized chlorinated polyolefin, a maleic anhydride functionalized A-B-A block copolymer where A is a thermoplastic polystyrene and B is a rubber midblock, and a crosslinking agent capable of reacting with the maleic anhydride functional groups in said polyolefin and said block copolymer.
A polyolefin-backed pressure sensitive adhesive tape comprising:
- a polyolefin backing;
- a release coating;
- a pressure sensitive adhesive;
- and
- a primer coating located between said polyolefin backing and said pressure sensitive adhesive, where the primer coating comprises a maleic anhydride functionalized chlorinated polyolefin, a maleic anhydride functionalized A-B-A block copolymer where A is a thermoplastic polystyrene and B is a rubber midblock, and a crosslinking agent capable of reacting with the maleic anhydride functional groups in said polyolefin and said block copolymer.
A method of manufacturing a polyolefin-backed pressure sensitive adhesive tape comprising:
- providing a polyolefin backing;
- applying a release coating to a surface of the polyolefin backing;
- applying to an opposing surface of the polyolefin backing a primer coating where the primer coating comprises a maleic anhydride functionalized chlorinated polyolefin, a maleic anhydride functionalized A-B-A block copolymer where A is a thermoplastic polystyrene and B is a rubber midblock, and a crosslinking agent which is capable of reacting with the maleic anhydride functional groups in said polyolefin and said block copolymer;
- and
- applying a pressure sensitive adhesive to the primer coating.
Dependencies are inferred from the claim text.