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Solid Solvent Hot Melt Adhesive

IP.com Disclosure Number: IPCOM000077850D
Original Publication Date: 1972-Oct-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Kotla, JJ: AUTHOR [+2]

Abstract

A solid solution adhesive comprising a crystalline material that is solid at room temperature and a resinous material that is solvable by the crystalline melt, may be applied to a substrate at a temperature significantly lower than the application temperature for conventional hot melt adhesives.

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Solid Solvent Hot Melt Adhesive

A solid solution adhesive comprising a crystalline material that is solid at room temperature and a resinous material that is solvable by the crystalline melt, may be applied to a substrate at a temperature significantly lower than the application temperature for conventional hot melt adhesives.

Crystalline materials exhibit sharply defined melting points above which they exist as free-flowing Newtonian liquids; but these materials are inherently brittle and nonbonding in their solid state, and hence have not been suitable heretofore as hot melt adhesives. However, by adding a resinous component which dissolves when the crystalline material is melted, both a lower application temperature and lower viscosity adhesive composition are achieved than with conventional hot melt adhesives. For example, a conventional hot melt adhesive that might soften at 185 degrees F. might have to be heated to between 350 degrees F. and 400 degrees F. to reduce its viscosity sufficiently to enable application.

A wide variety of resin/solid solvent combinations will yield satisfactory adhesives for specific applications. Accordingly, the following examples are to be considered as merely illustrative: Example 1 % by Weight

70 CASCOMELT H-5547 resin (Borden Chemical Co.)

30 Pentaerythritol tetrabenzoate (PETB) solid

solvent (Velsicol Chemical Co.)

100. Application temperature of the above is 285 degrees F., whereas that of the Cascomelt H-5547 (which is o...