Low NMP aqueous polyurethane composition with reactive diluent

An aqueous composition comprising a polyurethane dispersion with a sediment content ≦5%, wherein the polyurethane has an acid value in the range of from 25 to 65 mgKOH/g and comprises (i) 36 to 60 wt % of at least one aromatic polyisocyanate and where the polyurethane is prepared in the presence of...

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Main Authors Casteren Van, Ilse, Roelands, Marc, Overbeek, Geraldus Cornelis, Coogan, Richard George, Tennebroek, Ronald, Kuzmin, Ann
Format Patent
LanguageEnglish
Published 31.05.2011
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Summary:An aqueous composition comprising a polyurethane dispersion with a sediment content ≦5%, wherein the polyurethane has an acid value in the range of from 25 to 65 mgKOH/g and comprises (i) 36 to 60 wt % of at least one aromatic polyisocyanate and where the polyurethane is prepared in the presence of (a) ≦5 wt % of 1-methyl-2-pyrrolidinone by weight of the polyurethane and (b) at least one reactive diluent.