Mixtures of polyols containing a polyol initiated by 1,3- and / or 1,4-bis (aminomethyl) cyclohexane and at least one of a polyol initiated by methylene-bis- (cyclohexylamine) and a polyol initiated by cyclohexanediamine, and polyurethanes prepared from them

摘要

A mixture of polyols comprising (a) at least one amine-initiated polyol having an average hydroxyl functionality greater than 3.0 to 4.0, which is a reaction product of at least one C2-C4 alkylene oxide with a 1,3- and / or 1,4-bis (aminomethyl) cyclohexane, and (b) at least one of (b) (i) and (b) (ii), in which (b) (i) is at least one amine-initiated polyol having an average hydroxyl functionality greater than 3.0 to 4.0, which is a reaction product of at least one C2-C4 alkylene oxide with a methylene-bis initiator compound (cyclohexylamine ) and (b) (ii) is at least one amine-initiated polyol having an average hydroxyl functionality greater than 3.0 to 4.0, which is the reaction product of at least one C2-C4 alkylene oxide with a compound of 1,2-, 1,3- and / or 1,4-diaminocyclohexane, in which each of the components (a) and (b) constitutes at least 0.5 percent by weight of the polyols in the mixture of polyols, and components (a) and (b) together constitute at least two percent by weight of the polyols in the polyol mixture.