High performance solvent-free contact adhesive
AssigneeAir Products and Chemicals, Inc.
InventorFrank V. DiStefano
Life of this patent
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Abstract
An aqueous contact adhesive composition consisting essentially of a) an aqueous emulsion containing an adhesive polymer, b) 0-50 wt % plasticizer, based on polymer solids, c) 0.5-10 wt % thermoplastic hollow microspheres, based on polymer solids, and d) 0-4.5 wt % polyethylenimine, based on polymer solids, the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
Claims23
An aqueous contact adhesive composition consisting essentially of
- a) an aqueous emulsion containing a contact adhesive polymer which is a vinyl acetate-ethylene, acrylic or neoprene polymer,
- b) 0-50 wt % plasticizer, based on contact adhesive polymer,
- c) 0.5-10 wt % thermoplastic hollow microspheres, based on contact adhesive polymer, and
- d) 0-4.5 wt % polyethylenimine, based on contact adhesive polymer,
- the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
An aqueous contact adhesive composition consisting essentially of
- a) an aqueous emulsion containing a contact adhesive polymer which is a vinyl acetate-ethylene, acrylic or neoprene polymer,
- b) 0-50 wt % plasticizer, based on contact adhesive polymer,
- c) 0.5-10 wt % thermoplastic hollow microspheres, based on contact adhesive polymer, the microspheres having a dry density of 0.01 to 0.1 g/cm.sup.3 and being poly(vinylidene chloride-acrylonitrile), polystyrene or poly(styrene-acrylonitrile) microspheres, and
- d) 0-4.5 wt % polyethylenimine, based on contact adhesive polymer, having an average molecular weight of about 30,000 to 150,000,
- the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
An aqueous contact adhesive composition consisting essentially of
- a) an aqueous contact adhesive vinyl acetate-ethylene copolymer emulsion, the vinyl acetate-ethylene copolymer polymerized in the presence of a stabilizing system consisting essentially of low molecular weight polyvinyl alcohol and a polyalkoxylated nonionic surfactant and the emulsion containing at least 65% solids,
- b) 15-50 wt % plasticizer, based on contact adhesive copolymer,
- c) 0.5-4.5 wt % thermoplastic hollow microspheres, based on contact adhesive copolymer, the microspheres having a dry density of 0.02 to 0.06 g/cm.sup.3 and are poly(vinylidene chloride-acrylonitrile), polystyrene or poly(styrene-acrylonitrile) microspheres, and
- d) 0.75-4.5 wt % polyethylenimine, based on contact adhesive copolymer, having an average molecular weight of about 30,000 to 150,000,
- the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
A method for laminating two substrates which comprises applying a coating of an aqueous contact adhesive composition to a surface of each of the substrates, drying the coatings and joining the adhesive-coated surfaces of the substrates, the aqueous contact adhesive composition consisting essentially of
- a) an aqueous emulsion containing a contact adhesive polymer,
- b) 0-50 wt % plasticizer, based on contact adhesive polymer,
- c) 0.5-10 wt % thermoplastic hollow microspheres, based on contact adhesive polymer, and
- d) 0-4.5 wt % polyethylenimine, based on adhesive polymer,
- the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
A method for laminating two substrates which comprises applying a coating of an aqueous contact adhesive composition to a surface of each of the substrates, drying the coatings and joining the adhesive-coated surfaces of the substrates, the aqueous contact adhesive composition consisting essentially of
- a) an aqueous emulsion containing a contact adhesive polymer which is a vinyl acetate-ethylene, acrylic, styrene-acrylic, styrene-butadiene or neoprene polymer,
- b) 0-50 wt % plasticizer, based on adhesive polymer,
- c) 0.5-10 wt % thermoplastic hollow microspheres, based on adhesive polymer, the microspheres having a dry density of 0.01 to 0.1 g/cm.sup.3 and being poly(vinylidene chloride-acrylonitrile), polystyrene or poly(styrene-acrylonitrile) microspheres, and
- d) 0-4.5 wt % polyethylenimine, based on adhesive polymer, having an average molecular weight of about 30,000 to 150,000,
- the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
A method for laminating two substrates which comprises applying a coating of an aqueous contact adhesive composition to a surface of each of the substrates, drying the coatings and joining the adhesive-coated surfaces of the substrates, the aqueous contact adhesive composition consisting essentially of
- a) an aqueous contact adhesive vinyl acetate-ethylene, copolymer emulsion, the vinyl acetate-ethylene copolymer polymerized in the presence of a stabilizing system consisting essentially of low molecular weight polyvinyl alcohol and a polyalkoxylated nonionic surfactant and the emulsion containing at least 65% solids,
- b) 15-50 wt % plasticizer, based on contact adhesive copolymer,
- c) 0.5-4.5 wt % thermoplastic hollow microspheres, based on contact adhesive polymer, the microspheres having a dry density of 0.02 to 0.06 g/cm.sup.3 and are poly(vinylidene chloride-acrylonitrile), polystyrene or poly(styrene-acrylonitrile) microspheres, and
- d) 0.75-4.5 wt % polyethylenimine, based on contact adhesive copolymer, having an average molecular weight of about 30,000 to 150,000,
- the adhesive composition demonstrating less than one pound per linear inch adhesion to stainless steel by PSTC-1 method.
Dependencies are inferred from the claim text.