Urea-based pressure sensitive adhesives
Assignee3M Innovative Properties Company
InventorsAudrey A. Sherman, Wendi J. Winkler, Scott M. Tapio, Robert J. Reuter, James P. DiZio
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Abstract
Non-silicone urea-based adhesives are disclosed which are prepared by the polymerization of reactive oligomers with the general formula X—B—X, where X is an ethylenically unsaturated group and B is a unit free of silicone and containing urea groups. The reactive oligomers can be prepared from polyamines through chain extension reactions using diaryl carbonates followed by capping reactions. Adhesive articles, including optical adhesive articles may be prepared using the disclosed non-silicone urea-based adhesives.
Claims25
An adhesive comprising a cured mixture comprising:
- at least one X—B—X reactive oligomer, wherein
- X comprises an ethylenically unsaturated group,
- and B comprises a non-silicone segmented urea-based unit, wherein the X—B—X reactive oligomer is the reaction product of a non-silicone segmented urea-based diamine and a Z—W—Z material, wherein Z comprises an amine-reactive group and W comprises a linking group, followed by the reaction with a Y—X material wherein X comprises an ethylenically unsaturated group, and Y comprises a Z-reactive group, and wherein the non-silicone segmented urea-based diamine is the reaction product of a polyoxyalkylene diamine with a diaryl carbonate;
- and
- an initiator, wherein the adhesive is a pressure sensitive adhesive.
A polymerizable reactive oligomer comprising the structure X—B—X, wherein X comprises an ethylenically unsaturated group and B comprises a non-silicone segmented urea-based unit.
An adhesive comprising a cured reaction mixture, the reaction mixture comprising:
- at least one X—B—X reactive oligomer, wherein
- X comprises an ethylenically unsaturated group,
- and B comprises a non-silicone segmented urea-based unit;
- and wherein the X—B—X reactive oligomer is the reaction product of a non-silicone segmented urea-based diamine and a Z—X material, wherein X comprises an ethylenically unsaturated group, and Z comprises an amine-reactive group, wherein the amine-reactive group Z reacts with an amine group of the non-silicone segmented urea-based diamine and wherein the non-silicone segmented urea-based diamine is the reaction product of a polyoxyalkylene diamine with urea;
- and
- an initiator;
- and wherein the adhesive is a pressure sensitive adhesive or a heat activated adhesive.
A method of preparing an adhesive comprising:
- providing a curable composition comprising:
- at least one X—B—X reactive oligomer, wherein X comprises an ethylenically unsaturated group, and B comprises a non-silicone segmented urea-based unit, wherein the X—B—X reactive oligomer is the reaction product of a non-silicone segmented urea-based diamine and a Z—W—Z material, wherein Z comprises an amine-reactive group and W comprises a linking group, followed by the reaction with a Y—X material wherein X comprises an ethylenically unsaturated group, and Y comprises an Z-reactive group, wherein Z—W—Z comprises a diisocyanate and Y—X comprises a hydroxyl-functional (meth)acrylate;
- and an initiator;
- and
- curing the curable composition;
- wherein the adhesive is a pressure sensitive adhesive.
An adhesive article comprising:
- a pressure sensitive adhesive comprising the cured reaction product of at least one X—B—X reactive oligomer, wherein X comprises an ethylenically unsaturated group,
- and B comprises a non-silicone segmented urea-based unit wherein the X—B—X reactive oligomer is the reaction product of a non-silicone segmented urea-based diamine and a Z—X material, wherein X comprises an ethylenically unsaturated group, and Z comprises
- an amine-reactive group, wherein the amine-reactive group Z reacts with an amine group of the non-silicone segmented urea-based diamine and wherein the non-silicone segmented urea-based diamine is the reaction product of a polyoxyalkylene diamine with urea;
- and a substrate.
Dependencies are inferred from the claim text.