Dental and biomedical foams and method

Claim 1

A METHOD FOR PREPARING DENTAL AND MEDICAL FOAM STRUCTURES HAVING OF AN IMPROVED CROSSLINKED HYDROPHLILIC FOAM HAVING THREE-DMINSIONAL NETWORKS, SAID METHOD CONSISTING ESSENTIALLY OF REACTING A FIRST COMPONENT COMPRISING ISOCYANATE CAPPED HYDROPHILIC POLYOXYETHYLENE POLYOL WITH AN ISOCYANATE FUNCTIONALITY GREATER THAN E AND SECOND CMPONENT COMPRISING WATER, WHEREIN THE H2O INDEX VALUE OF SAID CAPPED POLYOL AND WATER IS ABOUT 1,300 TO ABOUT 78,000, WHEREIN THE FIRST COMPONENT INCLUDES A CAPPED POLYOXYETHYLENE POLYOL MOIETY HAVING AN ISOCYANATE FUNCTIONALITY OF TWO PRESENT IN AN AMOUNT OF 0% BY WEIGHT UP TO 97% BY WEIGHT OF THE FIRST COMPONENT, AND THE POLYOXYETHLENE POLYOL MOIETY HAS A WEIGHT AVERAGE MOLECULAR WEIGHT OF ABOUT 200 TO ABOUT 20.000. AND A HYDROXYL FUNCTIONALITY OF ABOUT 2 TO ABOUT 8, COOLING OR DRYING THE PREPARED FOAM, AND CUTTING AND COMPRESSING COOLED OR DRIED FOAM SECTIONS.

Claim 2

A METHOD FOR PREPARING DENTAL AND MEDICAL FOAM STRUCTURES HAVING OF AN IMPROVED CROSSLINKED HYDROPHLILIC FOAM HAVING THREE-DMINSIONAL NETWORKS, SAID METHOD CONSISTING ESSENTIALLY OF REACTING A FIRST COMPONENT COMPRISING ISOCYANATE CAPPED HYDROPHILIC POLYOXYETHYLENE POLYOL WITH AN ISOCYANATE FUNCTIONALITY GREATER THAN E AND SECOND CMPONENT COMPRISING WATER, WHEREIN THE H2O INDEX VALUE OF SAID CAPPED POLYOL AND WATER IS ABOUT 1,300 TO ABOUT 78,000, WHEREIN THE FIRST COMPONENT INCLUDES A CAPPED POLYOXYETHYLENE POLYOL MOIETY HAVING AN ISOCYANATE FUNCTIONALITY OF TWO PRESENT IN AN AMOUNT OF 0% BY WEIGHT UP TO 97% BY WEIGHT OF THE FIRST COMPONENT, AND THE POLYOXYETHLENE POLYOL MOIETY HAS A WEIGHT AVERAGE MOLECULAR WEIGHT OF ABOUT 200 TO ABOUT 20.000. AND A HYDROXYL FUNCTIONALITY OF ABOUT 2 TO ABOUT 8, COOLING OR DRYING THE PREPARED FOAM, AND CUTTING AND COMPRESSING COOLED OR DRIED FOAM SECTIONS.

Claim 8

A method for preparing dental and medical foam structures of an improved crosslinked hydrophilic foam having three-dimensional networks, said method consisting essentially of reacting a first component comprising isocyanate capped hydrophilic polyoxyethylene polyol, having a reaction functionality equal to about two, a second component comprising water, and a third component comprising a crosslinking agent having a reaction functionality greater than two, said crosslinking agent being polyol, polyamine, polythiol or polyisocyanate, and wherein the H2O Index Value of said capped polyol and water is about 1,300 to about 78,000, said crosslinking agent prior to foaming reaction being non-reactively disposed in the water component or the isocyanate capped component, cooling or drying the prepared foam, and cutting and compressing cooled or dried foam sections.

Claim 9

A method for preparing dental and medical foam structures of an improved crosslinked hydrophilic foam having three-dimensional networks, said method consisting essentially of reacting a first component comprising isocyanate capped hydrophilic polyoxyethylene polyol, having a reaction functionality equal to about two, a second component comprising water, and a third component comprising a crosslinking agent having a reaction functionality greater than two, said crosslinking agent being polyol, polyamine, polythiol or polyisocyanate, and wherein the H2O Index Value of said capped polyol and water is about 1,300 to about 78,000, said crosslinking agent prior to foaming reaction being non-reactively disposed in the water component or the isocyanate capped component, cooling or drying the prepared foam, and cutting and compressing cooled or dried foam sections.