| abstract |
The TPU of the present invention contains unsaturation in its polymer backbone. Unsaturation may be present in the soft or hard segments of the TPU, or in both the soft and hard segments. The TPU can be molded like a thermoplastic and then crosslinked. In one embodiment, the TPU of the present invention comprises (1) hydroxyl terminal intermediates, (2) polyisocyanates, (3) saturated glycol chain extenders, and (4) glycol chain extenders containing carbon-carbon double bonds. Reaction product. In another embodiment of the invention, the thermoplastic polyurethane crosslinkable by e-beam irradiation comprises (1) saturated hydroxyl terminal intermediates, (2) unsaturated hydroxyl terminal intermediates containing carbon-carbon double bonds, (3 ) And a reaction product of (4) a saturated glycol chain extender. |