Hydro-oil-repellent compositions
AssigneeAusimont S.p.A.
InventorsTania Trombetta, Stefano Turri
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Abstract
Formulations formed by aqueous dispersions of cationic ionomer fluorinated polyurethanes based on (per)fluoropolyethers, having end groups constituted by —NCO groups reacted with hydrogenactive compounds to give covalent bonds stable to water but thermolabile, usable for the surface hydro- and oil-repellent treatment of textiles.
Claims21
Formulations formed by aqueous dispersions of cationic ionomer fluorinated polyurethanes based on (per)fluoropolyethers, having end geoups constituted by —NCO groups reacted with hydrogenactive compounds to give covalent bonds stable to water but thermolabile, which comply with the following test:
- by reacting the hydrogenactive cmpounds with tetramethyl-xylylenediisocyanate (TMXDI) and by thermal treatment between 80° C. and 180° C. for two minutes in the presence of dibutyltin dilaurate (DBTDL) as catalyst, at least 50% of the —NCO groups is restored.
Dependencies are inferred from the claim text.