Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Patent
1982-09-16
1991-10-15
Sluby, P. C.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
428344, 428442, 428511, 428522, 4285375, 428463, 428483, 428508, 428514, 428520, 428510, 525309, 526931, C09J 702, B32B 2308
Patent
active
050573667
ABSTRACT:
The invention provides normally tacky and pressure-sensitive adhesive compositions comprising a polymer having an inherent viscosity greater than 0.2 and having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol and, having attached to the backbone, polymeric moieties having a weight average molecular weight of above about 2,000 and a T.sub.g of above about 20.degree. C. The number and composition of the attached moieties in the polymer is such as to provide the adhesive composition with a shear holding value of at least 50 minutes. Sheet materials coated with the adhesive composition are also provided. Preferred adhesive composition comprises a copolymer monomeric acrylic or methacrylic acid ester of non-tertiary alcohol and macromolecular monomer. The copolymer may also include up to 12% by weight of a copolymerizable polar monomer such as acrylic acid.
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Husman James R.
Kellen James N.
McCluney Rebecca E.
Tumey Michael L.
Francis Richard
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Sluby P. C.
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