| 摘要 |
<p>This invention relates to isocyanate-modified poly(alkylene carbonate) polyahls comprising the residue of at least one polyahl, at least one isocyanate modifier, poly(alkyleneoxy) units, poly(alkylene carbonate) units, and a plurality of active hydrogen end groups. This invention also relates to isocyanate-functional prepolymer compositions of these isocyanate-modified poly(alkylene carbonate) polyahls, which contain the residue of at least one isocyanate-modified poly(alkylene carbonate) polyahl of this invention and excess organic polyisocyanate units. This invention further relates to urethane/urea polymers formed by the reactions of the isocyanate-functional prepolymers with polyahls; and the urethane/urea polymers comprising the residue of at least one isocyanate-modified poly(alkylene carbonate) polyahl of this invention, the residue of a polyisocyanate and the residue of at least one other polyahl selected from the group consisting of polyamines and polyfunctional hydroxyl compounds. The novel compositions of this invention are useful in urethane/urea polymer applications such as, for example, foam elastomers, plastics, adhesives and coatings.</p> |
