Polyurethaneurea elastomers for dynamic applications

摘要

A method for the rotational casting of a polyurethane elastomer onto a rotating substrate which comprises mixing a polyurethane prepolymer, an amine curative and optionally a polyol in a mixing head and depositing the mixture onto the rotating substrate, the amine curative comprising: (a) 2-45 wt% aminobenzoate polyol having molecular weight of 200-3,000, (b) 55-98 wt% aromatic polyamine, and (c) 0 to <5 parts by wt carboxylic acid catalyst per hundred parts (a) and (b), the amine curative being at a temperature sufficient to melt the amines when mixed with the polyurethane prepolymer.