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US 4,728,572 AGranted
Removable hot melt pressure sensitive adhesive
AssigneeNational Starch and Chemical Corporation
InventorIrwin J. Davis
Life of this patent
Estimating the term…
Abstract
Hot melt adhesive compositions prepared from styrene-isoprene-styrene block copolymers, a low softening point highly aliphatic resin and a metallic salt of a fatty acid exhibit a superior balance of properties in that they adhere well to a variety of substrates yet can be readily and cleanly removed when desired.
Claims13
Paper labels coated with a removeable pressure sensitive hot melt adhesive composition consisting essentially of:
- (a) 25 to 50% by weight of an A-B-A block copolymer where the A component is styrene or a homologue thereof and the B component is isoprene;
- (b) 20 to 50% by weight of a substantially aliphatic hydrocarbon resin having a softening point less than about 30.degree. C.;
- (c) 0 to 30% by weight of a substantially aliphatic hydrocarbon resin having a softening point of about 80.degree. to 150.degree. C.;
- (d) 0 to 25% by weight of mineral oil or petrolatum;
- (e) 0.25 to 3% by weight of a metallic salt of a C.sub.14 to C.sub.19 fatty acid;
- and
- (f) 0.2 to 2% of an antioxidant.
4 more elements
Dependencies are inferred from the claim text.