Preparation of poly(ether-urethanes) from cyclic ethers and orga

Details Preparation of poly(ether-urethanes) from cyclic ethers and orga Preparation of poly(ether-urethanes) from cyclic ethers and orga

1996-03-19

1997-10-14

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 44, 528 48, 528 56, 528 58, 528 73, 560 24, 560 26, 560115, 560157, 560158, 560330, 560355, 560358, 560359, 560360, C08G 1822, C08G 1824, C08G 1826, C08G 1808

Patent

active

056774125

ABSTRACT:
Poly(ether-urethanes) can be made from cyclic ethers and organic isocyanates by using selected metal compounds as catalysts. Polymers useful as thermoplastic elastomers, spandex fibers or urethane rubbers can be made by reacting diisocyanates containing functional groups with a tetrahydrofuran, especially tetrahydrofuran itself. The invention also discloses an improved process for the cationic polymerization of a cyclic ether by using an organic isocyanate.

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Olah, G.A. et al, "Cationic Ring-Opening Polymerization of Tetrahydrofuran with Boron, Aluminium, and Gallium Tristriflate", J. Applied Poly. Sci., 45, 1355-1360 (1992).
Hrkach, J.S. et al, "Cationic Polymerization of Tetryhydrofuran Initiated by Trimethylsilyl Trifluoromethanesulfonate", Macromolecules, 23, 4042-4046 (1990).

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