Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Patent
1992-02-28
1993-02-02
Ziegler, Jacob
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
428349, 4284111, 428413, 428437, 428451, 4285375, 524474, 524484, 524485, C09U 702
Patent
active
051837056
ABSTRACT:
This invention provides a normally tacky pressure-sensitive adhesive composition comprising (1) a radial teleblock copolymer having at least three monoalkenyl arene polymer blocks and a branched elastomeric conjugated diene polymer block, (2) a tackifying resin, and (3) from about 5 to about 20 parts by weight extending oil per 100 parts by weight of radial copolymer. The copolymer preferably has a molecular weight of about 180,000 to about 250,000, as expressed in polystyrene equivalent molecular weight units. The monoalkenyl arene polymer blocks preferably comprise from about 17% to about 23% by weight of the total molecular weight of the copolymer. The preferred polymer for the monoalkenyl arene block is polystyrene; the preferred polymer for the elastomeric conjugated diene block is polyisoprene.
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Birkholz Ronald B.
Glad Mark D.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Weinstein David L.
Ziegler Jacob
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