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US 6,720,387 B1Granted
Hot-melt adhesive compositions comprising acidic polymer and basic polymer blends
Assignee3M Innovative Properties Company
InventorsPeter A. Stark, Audrey A. Sherman, Albert I. Everaerts
Life of this patent
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Abstract
A hot-melt adhesive composition comprises a blend of at least one acidic polymer and at least one basic polymer. At least one of the polymers is a hot-melt adhesive. Thermally reversible crosslinks are formed between each of the two polymers. These crosslinks impart cohesive strength to the applied adhesive, without sacrificing ease of processing.
Claims24
A hot-melt pressure-sensitive adhesive composition, comprising a blend of:
- an acidic copolymer derived from a first group of monomers comprising at least one acidic monomer;
- and
- a basic copolymer derived from a second group of monomers comprising at least one basic monomer,
- wherein at least one of the first and second group of monomers comprises greater than 25% by weight of acidic or basic monomers, respectively, and
- wherein one of the acidic copolymer and the basic copolymer comprises up to about 5% by weight of the blend.
2 more elements
Dependencies are inferred from the claim text.