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US 6,232,366 B1Granted
Pressure sensitive conductive adhesive having hot-melt properties and biomedical electrodes using same
Assignee3M Innovative Properties Company
InventorsDanLi Wang, Peter A. Stark, Albert I. Everaerts
Life of this patent
Estimating the term…
Abstract
A skin-compatible, hot-melt processible, pressure sensitive adhesive is disclosed. A thermo-reversible cross-linking is achieved, permitting advantages in processibility and the reduction of waste.
Claims22
A skin-compatible, hot-melt processible, pressure sensitive adhesive, comprising:
- between about 30 to 45 parts by weight of a copolymer comprised of between about 30 to 45 parts by weight of an (meth)acrylate ester monomer having C4-C20 alkyl chains, and between about 55 to 70 parts by weight of an acidic comonomer;
- between about 0 to 35 parts by weight of a hydrophilic plasticizer;
- between about 20 to 40 parts by weight of water,
- between about 0 to 3 parts by weight of a water soluble salt,
- between about 10 to 20 parts by weight of a surfactant, and
- between about 0.5 to 10 parts by weight of a polymer having amine functionality.
3 more elements
A method for preparing skin-compatible, hot-melt processible, pressure sensitive adhesive, comprising the steps of:
- a) preparing a mixture of ethylenically unsaturated monomers comprising:
- between about 30 to 45 parts by weight of an (meth)acrylate ester monomer having C4-C20 alkyl chains, and
- between about 55 to 70 parts by weight of an acidic comonomer;
- b) mixing between about 30 to 45 parts by weight of the mixture of ethylenically unsaturated monomers with between about 0 to 35 parts by weight of a hydrophilic plasticizer so as to form a hydrophilic plasticizer/monomer mixture;
- c) polymerizing the monomers to form a polymer matrix containing the plasticizer;
- d) blending an additive mixture into the polymer matrix, the additive mixture comprising
- between about 20 to 40 parts by weight of water,
- between about 0 to 3 parts of a water soluble salt,
- between about 10 to 20 parts by weight of a surfactant, and
- between about 0.5 to 10 parts by weight of a polymer having amine functionality, so as to form a skin-compatible hot-melt processible, ionically conductive, pressure sensitive adhesive.
7 more elements
A method for preparing skin-compatible, hot-melt processible, pressure sensitive adhesive, comprising the steps of:
- a) preparing a mixture of ethylenically unsaturated monomers comprising:
- between about 30 and about 45 parts by weight of an (meth)acrylate ester monomer having C4-C12 alkyl chains, and
- between about 55 and about 70 parts by weight of an acidic comonomer;
- b) mixing between about 30 and about 45 parts by weight of the mixture of ethylenically unsaturated monomers with between about 0 and about 35 parts by weight of a hydrophilic plasticizer, between about 10 and about 30 parts by weight of water, between about 0 and about 3 parts by weight of a water soluble salt, and between about 0 and about 7 parts by weight of a surfactant, so as to form a hydrophilic plasticizer/monomer/surfactant/water mixture;
- c) polymerizing of the monomers to form a polymer matrix containing plasticizer, water, and surfactant;
- d) blending an additive mixture into the polymer matrix, the additive mixture comprising
- between about 1 and about 3 parts by weight of a water soluble salt,
- between about 10 and about 30 parts by weight of water,
- between about 10 and about 13 parts by weight of a surfactant, and
- between about 0.5 and about 10 parts by weight of a polymer having amine functionality,
- so as to form a skin-compatible hot-melt processible, ionically conductive, pressure sensitive adhesive.
8 more elements
Dependencies are inferred from the claim text.