Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heterocyclic reactant containing as ring atoms oxygen,...
Patent
1992-01-22
1992-12-29
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heterocyclic reactant containing as ring atoms oxygen,...
528407, 523111, C08G 5900, C08G 5922, C08G 5926
Patent
active
051752468
ABSTRACT:
Crosslinked hydrogel polymers are made by reacting a disubstituted aliphatic diamine of the general formula (I) or (XI) as given in the specification, with one or more diepoxides having the general formula (II), also as given in the specification, and subjecting the resulting non-crosslinked polymer having repeating units of the formula III or XIII to crosslinking conditions to produce the desired crosslinked hydrogel polymer. Hydrogel polymers thus produced are highly hydrophilic with a high degree of water uptake and a high equilibrium water content. In addition, these hydrogel polymers are highly absorptive of fluids and are adhesive when applied to dry surfaces but not when applied to wet surfaces. The hydrogel polymers are useful in wound dressings.
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Mascarenhas Oscar C.
Smith Daniel J.
DeWitt LaVonda R.
Michl Paul R.
University of Akron, The
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