Method for formulating a reactive polyurethane emulsion
AssigneeCarl Freudenberg KG
InventorsBirgit Severich, Thomas Schauber, Horst Muehlfeld, Robert Groten, Bjoern Hellbach, Ansgar Komp, Christian Waschinski
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Abstract
A method for production of a reactive polyurethane emulsion for use in impregnating and coating a textile fabric includes reacting polyols alone or in combination with at least one of diols and triols with a substoichiometric amount of diisocyanates so as to form medium-viscosity, OH-terminated prepolymers. The prepolymers are mixed with an external emulsifier. At least one of a diisocyanate, a triisocyanate and a polyisocyanate are added so as to bring about a crosslinking of the prepolymers.
Claims35
1-32. (canceled)
A method for production of a reactive polyurethane emulsion for use in impregnating and/or coating a textile fabric, the method comprising:
- reacting polyols alone or in combination with at least one of diols and triols with a substoichiometric amount of diisocyanates so as to form medium-viscosity, OH-terminated prepolymers;
- mixing the prepolymers with an external emulsifier;
- and
- adding at least one of a diisocyanate, a triisocyanate and a polyisocyanate so as to bring about a crosslinking of the prepolymers.
Dependencies are inferred from the claim text.