Bookbinding adhesives and a method of applying same

Claim 2

A SOLVENT-FREE, HOT MELT ADHESIVE COMPOSITION PARTICULARLY ADAPTED FOR BINDING BOOKS, COMPRISING AN ETHANOL-SOLUBLE SYNTHETIC LINEAR POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.4 AND CONTAINING AMIDE GROUPS SEPARATED BY AN AVERAGE OF AT LEAST TWO CARBON ATOMS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND A COMPATIBLE LIQUEFYING SOFTENER THEREFOR, THE RATIO OF POLYAMIDE TO SOFTENER BEING BETWEEN 45:55 AND 65:35.

Claim 3

A PROCESS FOR BINDING BOOKS WITHOUT STITCHING OR STAPLING, WHICH COMPRISES CLAMPING TOGETHER UNDER PRESSURE, WITH A SMALL PORTION OF THE BINDING EDGES EXPOSED, THE PAGES WHICH ARE TO FORM A BOOK, COATING THE EXPOSED BINDING EDGES WITH A WARM PRIMER COMPOSITION COMPRISING A SYNTHETIC LINEAR POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.4 AND CONTAINING AMIDE GROUPS SEPARATED BY AN AVERAGE OF AT LEAST TWO CARBON ATOMS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND BEING SOLUBLE IN 80% ETHANOL, A COMPATIBLE LIQUEFYING SOFTENER, AND A VOLATILE SOLVENT THEREFOR, REMOVING SUBSTANTIALLY ALL UNABSORBED COATING, EVAPORATING THE VOLATILE SOLVENT, AND APPLYING AT ABOUT 320* F. A SOLVENTFREE, HOT MELT ADHESIVE TO THE PRIMER COATED EDGES OF THE PAPER, SAID ADHESIVE COMPRISING A SYNTHETIC LINEAR POLYAMIDE HAVING THE SAME CHARACTERISTICS AS THAT ABOVE AND A COMPATIBLE LIQUEFYING SOFTENER, THE RATIO OF POLYAMIDE TO SOFTENER IN BOTH THE PRIMER COMPOSITION AND THE HOT MELT ADHESIVE BEING BETWEEN 45:55 AND 65:35.

Claim 4

A PROCESS FOR BINDING BOOKS WITHOUT STITCHING OR STAPLING, WHICH COMPRISES CLAMPING TOGETHER UNDER PRESSURE, WITH A SMALL PORTION OF THE BINDING EDGES EXPOSED, THE PAGES WHICH ARE TO FORM A BOOK, COATING THE EXPOSED BINDING EDGES WITH A WARM PRIMER COMPOSITION COMPRISING A SYNTHETIC LINEAR POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.4 AND CONTAINING AMIDE GROUPS SEPARATED BY AN AVERAGE OF AT LEAST TWO CARBON ATOMS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND BEING SOLUBLE IN 80% ETHANOL, A COMPATIBLE LIQUEFYING SOFTENER, AND A VOLATILE SOLVENT THEREFOR, REMOVING SUBSTANTIALLY ALL UNABSORBED COATING, EVAPORATING THE VOLATILE SOLVENT, AND APPLYING AT ABOUT 320* F. A SOLVENTFREE, HOT MELT ADHESIVE TO THE PRIMER COATED EDGES OF THE PAPER, SAID ADHESIVE COMPRISING A SYNTHETIC LINEAR POLYAMIDE HAVING THE SAME CHARACTERISTICS AS THAT ABOVE AND A COMPATIBLE LIQUEFYING SOFTENER, THE RATIO OF POLYAMIDE TO SOFTENER IN BOTH THE PRIMER COMPOSITION AND THE HOT MELT ADHESIVE BEING BETWEEN 45:55 AND 65:35.

Claim 5

AN ARTICLE OF MANUFACTURE, HAVING A PLURALITY OF PAGES BOUND TOGETHER BY A SOLVENT-FREE HOT MELT ADHESIVE COMPOSITION COMPRISING A SYNTHETIC LINEAR POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.4 AND CONTAINING AMIDE GROUPS SEPARATED BY AN AVERAGE OF AT LEAST TWO CARBON ATOMS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND BEING SOLUBLE IN 80% ETHANOL AND A COMPATIBLE LIQUEFYING SOFTENER FOR THE SAID POLYAMIDE, THE RATIO OF POLYAMIDE TO SOFTENER BEING BETWEEN 45:55 AND 65:35.

Claim 6

AN ARTICLE OF MANUFACTURE, HAVING A PLURALITY OF PAGES BOUND TOGETHER BY A SOLVENT-FREE HOT MELT ADHESIVE COMPOSITION COMPRISING A SYNTHETIC LINEAR POLYAMIDE HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.4 AND CONTAINING AMIDE GROUPS SEPARATED BY AN AVERAGE OF AT LEAST TWO CARBON ATOMS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND BEING SOLUBLE IN 80% ETHANOL AND A COMPATIBLE LIQUEFYING SOFTENER FOR THE SAID POLYAMIDE, THE RATIO OF POLYAMIDE TO SOFTENER BEING BETWEEN 45:55 AND 65:35.