Polyurethane urea-containing adipic acid dihydrazide where active hydrogens react with the epoxy group found on glycidol to form a diol
AssigneeLake Region Manufacturing, Inc.
InventorPeter Anthony Edwards
Life of this patent
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Abstract
A coating composition containing added diol functionality to a urethane, a urea, or polyurethane urea functional resin where an adipic acid dihydrazide chain extender, or free adipic acid dihydrazide active hydrogens react with the oxirane group found in glycidol is described. The combination of diisocyanate, a polyether segment, optionally at least one polyester diol segment, optionally at least one poly(tetrahydrofuran) diol segment, optionally and at least one dimethylol propionic acid diol segment, at least one dihydrazide segment and glycidol compound introduces an increased hydrophilic structure, by diol addition, in compositions that are usable as coatings, on for example, medical devices.
Claims11
A polyurethane urea chain extended adipic acid dihydrazide diol coating as a reaction product of the following reactants:
- a) a diisocyanate;
- b) a polyether diol;
- c) adipic acid dihydrazide;
- d) glycidol;
- and
- e) water, which is in excess with respect to the diisocyanate and with respect to the glycidol.
A polyurethane urea chain extended adipic acid dihydrazide diol coating as a reaction product of the following reactants:
- a) a diisocyanate;
- b) a poly(ethylene oxide);
- c) a poly[di(ethylene glycol) adipate];
- d) a poly(tetrahydrofuran) diol;
- e) dimethylol propionic acid;
- f) adipic acid dihydrazide;
- g) glycidol;
- and
- h) water, which is in excess with respect to the diisocyanate and with respect to the glycidol.
Dependencies are inferred from the claim text.