Thermoplastic polyether urethane
First Claim
Patent Images
1. A thermoplastic urethane polymer, comprising:
- a polyether urethane derived from a diisocyanate reacted with a hydroxyl terminated polyether and a glycol chain extender,said hydroxyl terminated polyether having alkylene oxide repeat units containing from 2 to 6 carbon atoms and having a weight average molecular weight of at least 1,400,said chain extender being a substantially non-branched glycol having from 2 to 16 carbon atoms,wherein the amount of said chain extender is from about 0.7 to less than 1.0 mole per male of said hydroxyl terminated polyether and wherein the thermoplastic urethane polymer has a rebound of at least 60 percent when measured in accordance with ASTM D2632.
6 Assignments
0 Petitions
Accused Products
Abstract
A thermoplastic polyether polyurethane having good rebound resilience and low hysteresis properties is prepared by the reaction of a diisocyanate with a hydroxyl terminated polyether having a weight average molecular weight of at least 1,400 and a glycol chain extender. The polyether contains alkylene oxide repeat units having from 2 to 6 carbon atoms and the chain extender glycol has from 2 to 16 carbon atoms. The amount of the chain extender glycol is from about 0.25 to about 2 moles per mole of the polyether.
192 Citations
29 Claims
-
1. A thermoplastic urethane polymer, comprising:
-
a polyether urethane derived from a diisocyanate reacted with a hydroxyl terminated polyether and a glycol chain extender, said hydroxyl terminated polyether having alkylene oxide repeat units containing from 2 to 6 carbon atoms and having a weight average molecular weight of at least 1,400, said chain extender being a substantially non-branched glycol having from 2 to 16 carbon atoms, wherein the amount of said chain extender is from about 0.7 to less than 1.0 mole per male of said hydroxyl terminated polyether and wherein the thermoplastic urethane polymer has a rebound of at least 60 percent when measured in accordance with ASTM D2632. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 27, 28, 29)
-
-
23. A process for producing a thermoplastic urethane polymer comprising steps of:
mixing and reacting a hydroxyl terminated polyether, a glycol chain extender, and a diisocyanate, said hydroxyl terminated polyether having alkylene oxide repeat units containing from 2 to 6 carbon atoms and having a weight average molecular weight of at least 1400, wherein the mole ratio of said chain extender to said hydroxyl terminated polyether is from about 0.7 to less than 1.0 and wherein said polymer has a rebound of at least 60 percent when measured in accordance with ASTM D2632. - View Dependent Claims (24, 25, 26)
Specification