Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1989-03-03
1990-05-29
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 60, 528 66, C08G 1810
Patent
active
049297066
ABSTRACT:
Modified hydrophilic prepolymers and polymers are disclosed wherein the prepolymers and polymers are characterized by cell growth enhancement, and, in some instances, antibody production stimulation. Isocyanate-capped oxyethylene-based prepolymers are modified by reaction with a compound having at least one isocyanate (NCO) reactive group. Preferably, the NCO reactive group is a sulfhydryl group, an amino group or a carboxyl group, in quantities sufficient to modify at least a portion of the isocyanate groups of the prepolymer. The prepolymer and polymer also express a free functional group, preferably an amino, sulfonic acid or a sulfhydryl. When the free functional group is sulfhydryl or sulfonic acid, antibody production stimulation, as well as cell growth enhancement, is observed.
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Braatz James A.
Heifetz Aaron H.
Luthra Narender P.
Wolfe Richard A.
Cross Charles A.
W. R. Grace & Co.,-Conn.
Welsh Maurice J.
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