Radiation-curable, urethane-acrylate prepolymers and crosslinked

Details Radiation-curable, urethane-acrylate prepolymers and crosslinked Radiation-curable, urethane-acrylate prepolymers and crosslinked

1995-02-01

1997-10-07

Berman, Susan W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

522 96, 528 80, 528 81, 528 84, 525455, 525453, 264 22, 430269, 606157, 606158, 606154, A61B 1708, G03C 500, B29C 3502, C08L 7516

Patent

active

056749210

ABSTRACT:
A radiation-curable prepolymer of a polyurethane endtipped with an hydroxy (acrylate or methacrylate) is disclosed. The polyurethane is derived from the reaction of a polyfunctional isocyanate with a hydrolyzable oligomer of an anhydrous cyclic ester of an hydroxy acid. Crosslinked polymers prepared by irradiating the prepolymers are also disclosed. The crosslinked polymers are bioabsorbable and biocompatible with bodily tissue, yet still maintain the outstanding mechanical properties one would expect from a polyurethane. The prepolymers and crosslinked polymers are especially well-suited for the fabrication of surgical devices, particularly wound closure devices such as surgical staples and clips, in a stereolithography apparatus.

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