| 摘要 |
In one aspect, this invention is a polyurethane polymer having dispersed therein elongate particles of a high-melting, rigid polymer in an amount sufficient to measurably increase the tensile strength and/or elongation of the polyurethane relative to a like polyurethane which is prepared in the absence of said elongated particles. The elongate particles have an average length of less than 10 micrometers and an aspect ratio of greater then 1. The rigid polymer is advantageously formed separately from the formation of the polyurethane polymer. Preferably, the rigid polymer is dispersed in the active hydrogen-containing composition employed in making the polyurethane. A particularly useful rigid polymer is a polymer which is a reaction product of an aromatic diamine and an aromatic diisocyanate. The polyurethane polymer of this invention is useful as cushioning for furniture, bedding and automobile seating; as a coating or sealant and as automobile parts, such as bumpers, door panels and fascia. |
