Fast setting multipurpose bookbinding adhesive with excellent flexibility
AssigneeH.B. Fuller Licensing & Financing, Inc.
InventorDavid B. Malcolm
Life of this patent
Estimating the term…
Abstract
A hot melt adhesive for multipurpose bookbinding comprising a) from about 35% to about 40% by weight of a styrene-isoprene-styrene bloc copolymer; b) from about 25% to about 50% by weight of at least one compatible tackifying resin; c) from about 5% to about 30% by weight of a synthetic high melt point wax; d) from about 5% to about 30% by weight of a solid benzoate plasticizer; e) up to about 25% of a compatible wax; and f) up to about 15% of a compatible polymer.
Claims20
A hot melt adhesive for multipurpose bookbinding comprising:
- a) from about 25% to about 40% by weight of a styrene-isoprene-styrene block copolymer having a styrene content between about 15% and about 35% by weight;
- b) from about 25% to about 50% by weight of at least one compatible tackifying resin selected from the group consisting of rosins and rosin ester;
- terpenes and modified terpenes;
- aliphatic, cycloaliphatic and aromatic hydrocarbons;
- hydrogenated derivatives and mixtures thereof;
- c) from about 10% to about 30% by weight synthetic high melting point wax, said high melt point wax having a melting point of greater than about 90.degree. C.;
- d) from about 5% to about 30% by weight of a solid benzoate plasticizer;
- e) up to about 25% of a compatible wax selected from the group consisting of paraffin wax, microcrystalline wax and mixtures thereof;
- and
- f) up to about 15% of a compatible polymer selected from the group consisting of homopolymers, copolymers and terpolymers of ethylene;
- homopolymers, copolymers and terpolymers of propylene;
- rubbery block copolymers and mixtures thereof.
A multipurpose hot melt bookbinding adhesive comprising from about 30% to about 40% by weight of a styrene-isoprene-styrene block copolymer;
- from about 30% to about 40% by weight of at least one tackifying resin selected from the group of rosins and rosin esters;
- from about 10% to about 20% by weight of synthetic high melting point wax having a melt point of greater than about 90.degree. C.;
- and from about 5% to about 20% by weight of a benzoate plasticizer which is a solid at ambient temperatures;
- wherein Young's Modulus is less than about 2,500 psi, elongation at break is greater than about 2200%, and the yield point is less than about 250 psi resulting in excellent "lay flat."
A hot melt adhesive for multipurpose bookbinding comprising:
- a) from about 25% to about 40% by weight of at least one styrene-isoprene-styrene block copolymer;
- b) from about 25% to about 50% by weight of at least one compatible tackifying resin;
- c) from about 10% to about 30% by weight of a synthetic high melt point wax having a melt point of greater than about 90.degree. C.;
- and
- d) from about 5% to about 30% b weight of a solid benzoate plasticizer.
Dependencies are inferred from the claim text.