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US 7,094,843 B2Granted
Epoxy compositions having improved shelf life and articles containing the same
Assignee3M Innovative Properties Company
InventorScott R. Meyer
Life of this patent
Estimating the term…
Abstract
Epoxy systems having improved shelf life are disclosed. The epoxy systems are suitable for use in a number of applications, including as an adhesive or as a sealant (e.g., as a component in a melt-sealing tape). Methods of making and using the epoxy systems are also disclosed.
Claims22
An extended shelf life composition comprising:
- (a) at least one epoxy composition suitable for use as at least one of an adhesive and a sealant, wherein said epoxy composition comprises at least one curative that is a solid at about 25° C. said curative comprising a primary aliphatic amine, a secondary aliphatic amine, a primary aromatic amine, a secondary aromatic amine, or a combination thereof;
- and
- (b) at least one hydroxyl-containing aromatic compound added to said epoxy composition in a sufficiently low amount that the shelf life of said epoxy composition is extended beyond what it would be without the addition of said at least one hydroxyl-containing aromatic compound, wherein said at least one hydroxyl-containing aromatic compound has a molecular structure
- wherein n is in the range of from 1 to 8.
1 more element
A method of improving the shelf life of an epoxy composition, said method comprising:
- providing an epoxy composition suitable for use as at least one of an adhesive and a sealant, wherein said epoxy composition comprises at least one curative that is a solid at about 25° C., said curative comprising a primary aliphatic amine, a secondary aliphatic amine, a primary aromatic amine, a secondary aromatic amine, or a combination thereof;
- including at least one hydroxyl-containing aromatic compound in the epoxy composition, wherein said at least one hydroxyl-containing aromatic compound has a molecular structure
- wherein n is in the range of from 1 to 8
- providing the at least one hydroxyl-containing aromatic compound in a sufficiently low amount to extend the shelf life of the epoxy composition beyond what the shelf life would be without the addition of the at least one hydroxyl-containing aromatic compound.
1 more element
Dependencies are inferred from the claim text.