发明公开
EP2408831A1 THERMOPLASTIC POLYURETHANE WITH REDUCED TENDENCY TO BLOOM 有权
热塑性聚氨酯麻醉剂AUSBLÜHNEIGUNG

THERMOPLASTIC POLYURETHANE WITH REDUCED TENDENCY TO BLOOM
摘要:
A process of making a thermoplastic polyurethane by the reaction of (1) a hydroxyl terminated polyester intermediate, wherein the hydroxyl terminated polyester intermediate is comprised of repeat units that are derived from adipic acid and a glycol component comprising 1,3-propylene glycol, and said hydroxyl terminated intermediate has a number average molecular weight which is within the range of 500 to 10,000 Daltons, (2) a diisocyanate; and (3) a glycol chain extender. This thermoplastic polyurethane by this process is unique in that it has a greatly reduced tendency to bloom. This is highly desirable in applications where high clarity is desired because blooming causes articles containing the thermoplastic polyurethane to be hazy or foggy in appearance. Blooming can also reduce the ability of an article made with the thermoplastic polyurethane to be securely bound to another article with an adhesive.
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