Biodegradable compositions having pressure sensitive adhesive properties
A composition comprising the reaction product of (a) an isocyanate group-containing component having an average functionality of at least 2; and (b) an active hydrogen group-containing component having an average functionality of at least 2. The composition is biodegradable, a solid at 22° C. and below, and has pressure sensitive adhesive properties at a temperature of 37° C. and relative humidity of 100%. The composition may be used to adhere polymer meshes or films to biological tissue.
1. A polyurethane composition comprising a reaction product of:
(a) an isocyanate group-containing component selected from the group consisting of lysine diisocyanate and esters thereof, lysine triisocyanate and esters thereof, and combinations thereof; and
(b) an active hydrogen group-containing component comprising (i) at least one poly-hydroxy functional compound selected from the group consisting of a polyether polyols, polyester polyols, and polyhydroxyalkyl derivatives of C 3 -C 10 hydrocarbons and (ii) at least one mono-hydroxy functional compound selected from the group consisting of hydroxyalkylamines and alkyl alcohols,
wherein the ratio of hydroxyl groups to isocyanate groups ranges from 0.521 to 0.85;
wherein the composition is biodegradable, a solid at 22° C., and has pressure sensitive adhesive properties at a temperature of 37° C. and relative humidity of 100%.
2. The polyurethane composition according to claim 1 wherein the active hydrogen group-containing component comprises trimethylol propane.
3. The polyurethane composition according to claim 1 wherein the active hydrogen group-containing component comprises triethanolamine.
4. The polyurethane composition according to claim 1 wherein the composition further comprises a catalyst.
5. The polyurethane composition according to claim 1 wherein the reaction product is an inherently tacky urethane polymer.
6. The polyurethane composition according to claim 1 wherein the composition further comprises a tackifier.
7. The polyurethane composition according to claim 6 wherein the tackifier is selected from the group consisting of abietic acid, sucrose benzoate, and combinations thereof.