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US 10,357,407 B2Granted
Hot melt adhesive
AssigneeThe Procter & Gamble Company
InventorWilliam L. Bunnelle
Life of this patent
Estimating the term…
Abstract
A hot melt adhesive material and articles made using the hot melt adhesive to assemble structures in an article. The adhesive material typically is manufactured by blending amorphous polymer with a compatible amorphous polymer.
Claims23
A hot melt adhesive composition comprising:
- (i) from about 50 wt. % to about 90 wt. % of an amorphous polyolefin copolymer comprising more than 40 mole % 1-butene, the amorphous polyolefin copolymer having a viscosity of between 2000 and 8000 cps at a temperature of about 190° C.;
- and
- (ii) from about 10 wt. % to about 50 wt. % of a second amorphous polymer comprising at least one butene monomer, the second amorphous polymer having a molecular weight (MWn) of at least 1000, wherein the second amorphous polymer is compatible with the amorphous polyolefin copolymer.
A hot melt adhesive composition comprising:
- (i) about 90 wt. % to about 10 wt. % of an amorphous polyolefin composition comprising a copolymer having more than 40 mole % 1-butene, the copolymer having a viscosity of between 2000 and 8000 cps at a temperature of 190° C.;
- and
- (ii) about 0.1 wt. % to about 50 wt. % of a polyisobutylene;
- wherein the adhesive composition is substantially free of a tackifier;
- wherein the hot melt adhesive composition has a softening point temperature range of 115° C. to about 130° C.
2 more elements
A hot melt adhesive composition consisting essentially of:
- (i) a blend of amorphous polyolefin copolymers, each amorphous polyolefin copolymer comprising more than 40 mole % 1-butene, at least one amorphous polyolefin copolymer having a viscosity of between 2000 and 8000 cps at a temperature of 190° C.;
- and
- (ii) a second amorphous polymer comprising at least one butene monomer, the polymer having a molecular weight (MW) of at least 1000 wherein the polymer is compatible with the polyolefin.
A hot melt adhesive composition consisting essentially of:
- (i) an amorphous polyolefin copolymer comprising more than 40 mole % 1-butene, the amorphous polyolefin copolymer having a viscosity of between 2000 and 8000 cps at a temperature of 190° C.;
- and
- (ii) a second amorphous polymer comprising at least one butene monomer, the second amorphous polymer having a molecular weight (MWn) range of about 5,000 to about 45,000, wherein the second amorphous polymer is compatible with the amorphous polyolefin copolymer;
- wherein the hot melt adhesive composition has a softening point temperature range of 115° C. to about 130°.
1 more element
Dependencies are inferred from the claim text.