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AssigneeH.B. Fuller Licensing & Financing, Inc.
InventorsJohn P. Baetzold, Thomas F. Kauffman, Steven L. Scholl, Eugene R. Simmons
Estimating the term…
The present invention is a hot melt adhesive composition comprising at least one ingredient present in an encapsulated form. The encapsulated ingredient may be any known hot melt adhesive formulation ingredient as well as any hot melt adhesive additive such as antioxidants and fragrances for which there is a desirable change in adhesive properties by isolating such ingredient for a duration of time. The encapsulated ingredient is released from the shell by means of pressure, temperature, diffusion, pH, light, radiation, ultrasound, and combinations thereof. Hot melt adhesive compositions comprising at least one encapsulated ingredient are useful for a variety of novel products including self-supported friction glue sticks, non-tacky pelletized pressure sensitive adhesives, cohesive adhesive systems, hot melt adhesive compositions exhibiting improved thermal stability and odor, as well as for a variety of other adhesive applications.
A glue-stick comprising an adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acrylate, ethylene-n-butyl acrylate, polyethylene terephthalate, polyvinyl pyrrolidone, polyvinyl pyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifying resins, liquid polymers, liquid plasticizers, and mixtures thereof;
A hot melt pressure sensitive adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acetate, ethylene n-butyl acetate, polyethylene terephthalate, polyvinylpyrrolidone, polyvinylpyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifting resins, liquid polymers, liquid plasticizers and mixtures thereof, wherein said normally liquid ingredient is present in an encapsulated form and said adhesive composition is substantially non-tacky prior to release of the encapsulated ingredient.
A pellet comprising a hot melt pressure sensitive adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acrylate, ethylene-n-butyl acrylate, polyethylene terephthalate, polyvinyl pyrrolidone, polyvinyl pyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifying resins, liquid polymers, liquid plasticizers, and mixtures thereof;
Dependencies are inferred from the claim text.