Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1989-02-01
1990-06-19
Seidleck, James
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
215347, 215349, 428 3692, 428354, 428355, 428514, 428521, 428522, B65D 5304, C09J 702
Patent
active
049352733
ABSTRACT:
Closure liner, i.e., innerseal, comprising a pressure-activated adhesive that is a copolymer of butadiene and acrylonitrile or methacrylonitrile. The copolymer has a single glass transition temperature of no higher than about -25.degree. C., a nitrile content of no greater than about 31% by weight, preferably of from about 18% by weight to about 30% by weight, a Mooney viscosity of at least 95 (measured according to ASTM D1646-87 at 100.degree. C. for 4 minutes), preferably from about 120 to about 150. The copolymer is not cross-linked, and the amount of vinyl groups in the copolymer should not exceed 10% by weight.
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Safe-Gard.TM. Innerseals, prior to Feb. 1, 1989.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Seidleck James
Sell Donald M.
Weinstein David L.
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