Abstract: The present invention relates to a method of preparing adhesive coated articles and cold seal bonded laminates therefrom. Specifically, it relates to a method wherein certain polychloroprene based adhesive compositions are used to form adhesive coated substrates that are non-blocking and pressure sealable at ambient temperature. In a preferred embodiment, the invention relates to a method for the preparation of coated substrates and articles that are particularly useful for the manufacture of medical packaging and tamper evident applications.

Abstract: The present invention discloses a stable aqueous polyurethane dispersions comprising a reaction product of a water dispersible isocyanate-terminated polyurethane prepolymer (A), an aqueous polyurethane dispersion (B) and water, and a method wherein a water dispersible isocyanate-terminated polyurethane prepolymer (A) is dispersed in at least one aqueous polyurethane dispersion (B) and water, and reacted at about 35.degree. C. to about 95.degree. C. until substantially free of isocyanate. The inventive dispersions are useful in adhesives, coatings, binders, primers and sizers.

Abstract: The present invention is directed to aqueous polyurethane dispersions and aqueous polyurethane-acrylic dispersions, especially polymer dispersions formed from norbornane diisocyanate. The dispersions, and the dried polymers therefrom, are useful adhesives that provide enhanced bond strength when subjected to increased thermal and mechanical stress. Additionally, the inventive dispersions form polymers having increased adhesion compared to similar polymers based on cycloaliphatic diisocyanates which are free of a methylene bridge.

Abstract: Melamine-formaldehyde based adhesive compositions having enhanced bond strengths when subjected to thermal and mechanical stresses. The invention further describes a process wherein melamine-formaldehyde resins are reacted with amines in the presence of water-based sulfonated polyurethane-urea polymers. The process substantially reduces the release of formaldehyde and generates a network of interpenetrating polymers having enhanced peel adhesion failure temperatures.

Abstract: The invention relates to containers for hot melt adhesives containing isocyanate compounds and to such containers used with heated platen dispensing equipment for the hot melt. More particularly, the invention relates to containers and dispensers for isocyanate containing adhesives that can dispense the adhesive to a use locus without generating toxic concentrations of isocyanate compounds in the environment around the dispenser. The isocyanate compounds are sealed within the containers during dispensing, preventing the generation of a toxic concentration of isocyanate in the environment or the atmosphere during dispensing operations.