| abstract |
"Polyurethane Composition, Composition, Article, Personal Care Composition, Process for Producing a Polyurethane, and Mixing Process". A breathable polyurethane having an upright wet vapor transmission rate (MVTR) of more than about 500 g / m 2/24 hours comprises: a) poly (alkylene oxide) side chain units in a an amount comprising from about 12 wt% to about 90 wt% of said polyurethane, wherein (i) the alkylene oxide clamps in said poly (alkylene oxide) side units have from 2 to 10 carbon atoms. carbon and are unsubstituted, substituted or unsubstituted or substituted, (ii) at least about 50% by weight of said alkylene oxide groups are ethylene oxide and (iii) said amount of said side chain units is (i) at least about 30 wt% when the molecular weight of said side chain units is less than about 600 grams / mol, (ii) at least about 15 wt% when the molecular weight of said units side chain is about 600 to 1,000 grams / mol and at least about 12% by weight when the molecular weight of said side chain units is greater than about 1,000 grams / mol and b) poly (ethylene oxide) main chain units in an amount comprising less than about 25% by weight of said polyurethane. Coatings and films for textile products and other articles and applications using such polyurethanes have excellent breathability, ie high wet vapor transmission rates (MVTR). |