초록 ▼

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, espe

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.

대표청구항 ▼

An improved process for the cationic polymerization of a cyclic ether selected from the group consisting of oxetane, tetrahydrofuran, 1,3-dioxolane, 1,3,5-trioxane, and oxepane, wherein the improvement comprises, carrying out the cationic polymerization in the presence of an organic isocyanate, prov

An improved process for the cationic polymerization of a cyclic ether selected from the group consisting of oxetane, tetrahydrofuran, 1,3-dioxolane, 1,3,5-trioxane, and oxepane, wherein the improvement comprises, carrying out the cationic polymerization in the presence of an organic isocyanate, provided that a cationic catalyst does not substantially react with or cause substantial side reaction of the organic isocyanate under the process conditions, so that less than 10 mole percent of the isocyanate groups present react with the cationic catalyst or undergo said side reactions during said polymerization, and a poly(ether-urethane) is produced.