Patent ID: 6025434
Filing Date: 2000-02-15
Classification: C08G,C08L,C09J

Abstract:
A process for forming a non-flammable adhesive composition comprising the steps ofpurging moisture from a first container containing a chloride-based solvent;mixing an acrylic copolymer with the chloride-based solvent in the first container;blending the mixed acrylic copolymer and solvent sufficiently to dissolve the acrylic copolymer into an acrylic solvent mixture;purging moisture from a second container containing an isocyanate;mixing an ethylene oxide-capped diol and an ethylene oxide-capped triol into the isocyanate in the second container to form a prepolymer mixture;blending the prepolymer mixture sufficiently to form a homogeneous prepolymer mixture;heating the homogeneous prepolymer mixture to a temperature of from about 140.degree. F. to about 170.degree. F. for a time period of from about 3 hours or more;cooling the heated homogeneous prepolymer mixture to a temperature of from about 65.degree. F. to about 100.degree. F.;mixing the cooled homogeneous prepolymer mixture with the acrylic solvent mixture; and,blending the mixed homogeneous prepolymer mixture and acrylic solvent mixture sufficiently to form a homogeneous adhesive composition.