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US 5,804,610 AGranted
Methods of making packaged viscoelastic compositions
AssigneeMinnesota Mining and Manufacturing Company
InventorsCraig E. Hamer, John D. Moon, Thomas A. Kotnour
Life of this patent
Estimating the term…
Abstract
Methods for preparing viscoelastic compositions (e.g., adhesives such as hot melt adhesives) in which a pre-viscoelastic composition (e.g., a pre-adhesive composition) is combined with a packaging material and then polymerized by transmissive energy.
Claims27
A method of forming a hot melt adhesive composition comprising the steps of:
- (a) combining (i) a pre-adhesive composition which upon exposure to transmissive energy polymerizes to form a hot melt adhesive composition and (ii) a packaging material to form a packaged pre-adhesive composition;
- wherein said pre-adhesive composition has a viscosity less than about 50,000 centipoise at 25.degree. C.;
- and
- (b) exposing said packaged pre-adhesive composition to transmissive energy to polymerize said pre-adhesive composition to form a packaged hot melt adhesive composition;
- wherein said packaging material is meltable and mixable with said holt melt adhesive so as to provide a coatable hot-melt adhesive composition when said packaged hot melt adhesive composition is melted.
2 more elements
A method of forming a hot melt adhesive composition comprising the steps of:
- (a) combining (i) a pre-adhesive composition which upon exposure to transmissive energy polymerizes to form a hot melt adhesive composition and (ii) a packaging material to form a packaged pre-adhesive composition;
- wherein said pre-adhesive composition has a viscosity less than about 50,000 centipoise at 25.degree. C.
- (b) exposing said packaged pre-adhesive composition to transmissive energy to polymerize said pre-adhesive composition to form a packaged hot melt adhesive composition;
- and
- (c) melting said packaged hot melt adhesive composition;
- wherein said packaging material is meltable and mixable with said holt melt adhesive so as to provide a coatable hot-melt adhesive composition when said packaged hot melt adhesive composition is melted.
3 more elements
A method of forming a hot melt adhesive composition comprising the steps of:
- (a) combining (i) a pre-adhesive composition which upon exposure to transmissive energy polymerizes to form a hot melt adhesive composition and (ii) a packaging material by disposing said pre-adhesive composition between a pair of sheets to form a packaged pre-adhesive composition;
- wherein said pre-adhesive composition has a viscosity less than about 50,000 centipoise at 25.degree. C.;
- (b) exposing said packaged pre-adhesive composition to transmissive energy to polymerize said pre-adhesive composition to form a packaged hot melt adhesive composition;
- and
- (c) melting said packaged hot melt adhesive composition;
- wherein at least one of said sheets is meltable and mixable with said hot melt adhesive so as to provide a coatable hot-melt adhesive composition when said packaged hot melt adhesive composition is melted.
3 more elements
A method of forming an adhesive composition comprising the steps of:
- (a) combining (i) a pre-adhesive composition which upon exposure to ultraviolet radiation, thermal conduction, or a combination thereof polymerizes to form an adhesive composition and (ii) a packaging material to form a packaged pre-adhesive composition, wherein said pre-adhesive composition has a viscosity less than about 50,000 centipoise at 25.degree. C.;
- and
- (b) exposing said packaged pre-adhesive composition to ultraviolet radiation, thermal conduction, or a combination thereof to polymerize said pre-adhesive composition to form a packaged adhesive composition;
- wherein said packaging material is meltable and mixable with said adhesive so as to provide a coatable adhesive composition when said packaged adhesive composition is melted.
1 more element
Dependencies are inferred from the claim text.