Hot melt processable adhesive with ionic crosslinkers
Assignee3M Innovative Properties Company
InventorsHuiwen Tai, John A. Nielsen, Anish Kurian
Life of this patent
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Abstract
Hot melt processable composition mixtures include an acid-functional (meth)acrylate-based adhesive composition and a zinc di-(meth)acrylate salt. The adhesive composition has a hot melt processing temperature, and the zinc salt has a melting point that is higher than the hot melt processing temperature of the adhesive composition. The mixture is hot melt processable, and upon application to a substrate, the mixture forms an ionically crosslinked layer with thermally reversable ionic crosslinks.
Claims19
A hot melt processable composition mixture comprising:
- an acid-functional (meth)acrylate-based adhesive composition with a hot melt processing temperature;
- and
- a zinc di-(meth)acrylate salt with a melting point wherein the melting point is higher than the hot melt processing temperature of the acid-functional (meth)acrylate-based adhesive composition, wherein the mixture is hot melt processable,
- and upon application to a substrate the mixture forms an ionically crosslinked layer comprising thermally reversable ionic crosslinks.
A multi-layer article comprising:
- a first polymeric layer with a first major surface and a second major surface;
- a hot melt processed, ionically crosslinked adhesive layer with a first major surface and a second major surface wherein the first major surface of the adhesive layer is in contact with the second major surface of the first polymeric layer;
- and
- a second polymeric layer with a first major surface and a second major surface,
- wherein the first major surface of the second polymeric layer is in contact with the second major surface of the hot melt processed, ionically crosslinked adhesive layer,
- wherein the hot melt processed, ionically crosslinked adhesive layer comprises a hot melt processed mixture comprising:
- an acid-functional (meth)acrylate-based adhesive composition with a hot melt processing temperature;
- and
- a zinc di-(meth)acrylate salt with a melting point wherein the melting point is higher than the hot melt processing temperature of the acid-functional (meth)acrylate-based adhesive composition.
A method of forming a multi-layer article comprising:
- forming a hot melt processable adhesive mixture comprising:
- an acid-functional (meth)acrylate-based adhesive composition with a hot melt processing temperature;
- and
- a zinc di-(meth)acrylate salt with a melting point wherein the melting point is higher than the hot melt processing temperature of the acid-functional (meth)acrylate-based adhesive composition;
- hot melt mixing the hot melt processable adhesive mixture to form a flowable composition;
- disposing the flowable composition onto the surface of a first film substrate. wherein the first film substrate comprises a coextruded flowable polymeric composition;
- disposing a second film substrate on the surface of the adhesive composition to form a multi-layer flowable composition, wherein the second film substrate comprises a second coextruded flowable polymeric composition;
- and
- cooling the multi-layer flowable composition to room temperature to form a multi-layer article with an ionically crosslinked adhesive layer.
Dependencies are inferred from the claim text.