Breathable polyurethanes, blends, and articles
    1.
    发明授权
    Breathable polyurethanes, blends, and articles 有权
    透气聚氨酯,混合物和制品

    公开(公告)号:US06897281B2

    公开(公告)日:2005-05-24

    申请号:US10174899

    申请日:2002-06-19

    摘要: A breathable polyurethane having an upright moisture vapor transmission rate (MVTR) of more than about 500 gms/m2/24 hr comprises: (a) poly(alkylene oxide) side-chain units in an amount comprising about 12 wt. % to about 80 wt. % of said polyurethane, wherein (i) alkylene oxide groups in said poly(alkylene oxide) side-chain units have from 2 to 10 carbon atoms and are unsubstituted, substituted, or both unsubstituted and substituted, (ii) at least about 50 wt. % 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/mole, (ii) at least about 15 wt. % when the molecular weight of said side-chain units is from about 600 to about 1,000 grams/mole, and at least about 12 wt. % when the molecular weight of said side-chain units is more than about 1,000 grams/mole, and (b) poly(ethylene oxide) main-chain units in an amount comprising less than about 25 wt. % of said polyurethane. Coatings and films for textiles and other articles and applications using such polyurethanes have excellent breathability, i.e., high moisture vapor transmission rates (MVTR).

    摘要翻译: 具有超过约500gms / m 2 / 24hr的直立水蒸汽透过率(MVTR)的透气聚氨酯包括:(a)包含以下量的聚(环氧烷)侧链单元: 约12重量% %至约80wt。 %的所述聚氨酯,其中(i)所述聚(环氧烷)侧链单元中的氧化烯基团具有2至10个碳原子,并且是未取代的,取代的或未取代的和取代的,(ii)至少约50重量% 。 所述环氧烷基团的%为环氧乙烷,(iii)所述侧链单元的量为(i)至少约30wt。 当所述侧链单元的分子量小于约600克/摩尔时,(ii)至少约15重量% 当所述侧链单元的分子量为约600至约1,000克/摩尔时,和至少约12重量% 当所述侧链单元的分子量大于约1,000克/摩尔时,和(b)包含小于约25重量%的量的聚(环氧乙烷)主链单元。 %的所述聚氨酯。 使用这种聚氨酯的用于纺织品和其它制品和应用的涂料和薄膜具有优异的透气性,即高水蒸气透过率(MVTR)。