Bookbinding adhesives; processes for production of bookbinding adhesives; and methods of bookbinding
AssigneeExxon Chemical Patents Inc.
InventorRobert R. Milks
Life of this patent
Estimating the term…
Abstract
It has been discovered that certain hot melt adhesive formulations can be produced which exhibit superior lay-flat properties when used as bookbinding adhesives. The formulations incorporate copolymers of ethylene and unsaturated esters. The resulting bookbinding adhesives have viscosities of 2,000 to 8,000 cps at 177.degree. C. The bookbinding adhesives are found to impart lay-flat properties to books when the adhesives have a tensile to elongation ratio of .ltoreq.1.45.
Claims23
A bookbinding adhesive comprised of 30 to 50 weight percent of an ethylene unsaturated ester copolymer component comprised of a first ethylene unsaturated ester copolymer material having a melt index of 1 to 30 and a second ethylene unsaturated ester copolymer material having a melt index of 150 to 600 wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C. and a ratio of average tensile at break to average elongation at break .ltoreq.1.45.
A bookbinding adhesive comprised of 20 to 35 weight percent of an ethylene alkyl acrylate copolymer material having a melt index of 1 to 10;
- 40 to 60 weight percent of a tackifier;
- and 10 to 20 weight percent of a wax wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C. and a ratio of average tensile at break to average elongation at break.ltoreq.1.45.
A bookbinding adhesive comprised of 20 to 35 weight percent of an ethylene alkyl acrylate copolymer material having a melt index of 1 to 10;
- 40 to 60 weight percent of a tackifier;
- and 10 to 20 weight percent of a wax wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C. and a ratio of average tensile at break to average elongation at break .ltoreq.1.45.
A bookbinding adhesive consisting essentially of 45 to 65 weight percent of an ethylene alkyl acrylate copolymer material having a melt index of 200 to 600 wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C.
A bookbinding adhesive comprised of 45 to 65 weight percent of an ethylene alkyl acrylate copolymer material having a melt index of 200 to 600 wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C. and a ratio of average tensile at break to average elongation at break .ltoreq.1.45.
A bookbinding adhesive comprised of 30 to 50 weight percent of an ethylene unsaturated ester copolymer component comprised of 15 to 50 weight percent of a first ethylene unsaturated ester copolymer material having a melt index of 1 to 30 and 50 to 85 weight percent of a second ethylene unsaturated ester copolymer material having a melt index of 150 to 600 wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C. and a ratio of average tensile at break to average elongation at break .ltoreq.1.45.
A bookbinding adhesive consisting essentially of 40 to 65 weight percent of an ethylene vinyl acetate copolymer material having a melt index >400 and .ltoreq.600 and vinyl acetate content of 29 to 50 mole percent wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C.
A bookbinding adhesive comprised of 40 to 65 weight percent of an ethylene vinyl acetate copolymer material having a melt index >400 and .ltoreq.600 and vinyl acetate content of 29 to 50 mole percent wherein said bookbinding adhesive has a viscosity of 2,000 to 8,000 cps at 177.degree. C. and a ratio of average tensile at break to average elongation at break .ltoreq.1.45.
Dependencies are inferred from the claim text.