Polyurethane synthesis from functional group terminated polymers

Details Polyurethane synthesis from functional group terminated polymers Polyurethane synthesis from functional group terminated polymers

1996-12-18

2000-12-26

Gorr, Rachel

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 61, 528 65, 528 71, 528 75, 524591, 524840, C08G 1810

Patent

active

061661651

ABSTRACT:
Disclosed is a process for producing water-dispersible polyurethanes by forming an isocyanate-di-substituted prepolymer and reacting it with a chain extender. The prepolymer can be formed by reacting a diisocyanate with an ethylenically unsaturated precursor which is preferably formed by condensation polymerization of reactants including ethylenically unsaturated reactants and then sulfonating the ethylenic unsaturation of said polymeric precursor by reacting it with a sulfonating agent such as bisulfite, metabisulfite, or a mixture thereof.

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