Preparation of oxazolidone polymers in the presence of a magnesium halide/phosphine oxide complex

Claim 2

A PROCESS FOR PREPARING AN OXAZOLIDONE POLYMER WHICH COMPRISES REACTING A POLYISOCYANATE WITH A POLYEPOXIDE, THE EQUIVALENT RATIO OF ISOCYANATE GROUPS OF SAID POLYISOCYANATE TO EPOXIDE GROUPS OF SAID POLYEPOXIDE BEING 40/60 TO 65/35 AT A TEMPERATURE OF 20*C TO 250*C IN THE PRESENCE OF A MAGNESIUM HALIDE/PHOSPHINE OXIDE COMPLEX HAVING THE FOLLOWING FORMULA

Claim 3

A process according to claim 1, in which said magnesium halide is magnesium chloride.

Claim 4

A process according to claim 1, in which said phosphine oxide is any one of hexamethylphosphoric triamide, tri-n-butyl phosphine oxide and triphenyl phosphine oxide.

Claim 5

A process according to claim 1, in which said magnesium halide/phosphine oxide complex is a complex compound selected from the group consisting of magnesium chloride/hexamethylphosphoric triamide complex, magnesium chloride/tri-n-butylphosphine oxide complex, magnesium chloride/tri-n-ethylhexylphosphine oxide complex, and magnesium chloride/triphenylphosphine oxide complex.

Claim 6

A process according to claim 1, in which said polyisocyanate has at least two isocyanate groups.

Claim 7

A process according to claim 5, in which said polyisocyanate is a diisocyanate capped prepolymer of a hydroxyl terminated polymer wherein said diisocyanate is an aromatic diisocyanate.

Claim 8

A process according to claim 6, in which said Diisocyanate is tolylene diisocyanate.

Claim 9

A process according to claim 1, in which said polyepoxide has at least two oxirane groups.

Claim 10

A process according to claim 1, in which said polyepoxide is a diepoxide and said polyisocyanate is a diisocyanate.

Claim 11

A process according to claim 1, in which said polyepoxide is a bisphenol A diglycidyl ether.

Claim 12

POLYOXAZOLIDONE POLYMERS HAVING A BREAKAGE STRENGTH OF NOT LESS THAN 200 KG/CM2 AND AN ELONGATION AT BREAKAE OF NOT LESS THAN 400% PREPARED BY REACTING (A) BISPHENOL A DIGLYCIDYL ETHER AND (B) TOLYLENE DIISOCYANATE CAPPED PREPOLYMER OF HYDROXYL TERMINATED POLYETHER GLYCOL, THE EQUIVALENT RATIO OF ISOCYANATE GROUPS OF SAID TOLYLENE DIISOCYANATE CAPPED PREPOLYMER (B) TO EPOXIDE GROUPS OF SAID BISPHENOL A DIGLYCIDYL ETHER (A) BEING 40/60 TO 65/53, AT A TEMPERATURE OF 20*-250*C IN THE PRESENCE OF A MAGNESIUM HALIDE/PHOSPHINE OXIDE COMPLEX HAVING THE FOLLOWING FORMULA MGX2 . (O=P(-R2)(-R3)-R1)N IN WHICH X IS A HALOGEN ATOM, R1, R2 AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC AND AROMATIC HYDROCARBON AND AN AMINE WHICH IS DISUBSTITUTED BY AN ALIPHATIC HYDROCARBON, CONTAINING FROM ONE TO 20, INCLUSIVE, CARBON ATOMS, N IS 1, 2, 3 OR 4, THE AMOUNT OF SAID MAGNESIUM HALIDE/PHOSPHINE OXIDE COMPLEX BEING 0.05 TO 10 MOL PERCENT OF THE AMOUNT OF SAID POLYEPOXIDE AND SAID POLYISOCYANATE.

Claim 13

POLYOXAZOLIDONE POLYMERS HAVING A BREAKAGE STRENGTH OF NOT LESS THAN 200 KG/CM2 AND AN ELONGATION AT BREAKAE OF NOT LESS THAN 400% PREPARED BY REACTING (A) BISPHENOL A DIGLYCIDYL ETHER AND (B) TOLYLENE DIISOCYANATE CAPPED PREPOLYMER OF HYDROXYL TERMINATED POLYETHER GLYCOL, THE EQUIVALENT RATIO OF ISOCYANATE GROUPS OF SAID TOLYLENE DIISOCYANATE CAPPED PREPOLYMER (B) TO EPOXIDE GROUPS OF SAID BISPHENOL A DIGLYCIDYL ETHER (A) BEING 40/60 TO 65/53, AT A TEMPERATURE OF 20*-250*C IN THE PRESENCE OF A MAGNESIUM HALIDE/PHOSPHINE OXIDE COMPLEX HAVING THE FOLLOWING FORMULA MGX2 . (O=P(-R2)(-R3)-R1)N IN WHICH X IS A HALOGEN ATOM, R1, R2 AND R3 ARE SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC AND AROMATIC HYDROCARBON AND AN AMINE WHICH IS DISUBSTITUTED BY AN ALIPHATIC HYDROCARBON, CONTAINING FROM ONE TO 20, INCLUSIVE, CARBON ATOMS, N IS 1, 2, 3 OR 4, THE AMOUNT OF SAID MAGNESIUM HALIDE/PHOSPHINE OXIDE COMPLEX BEING 0.05 TO 10 MOL PERCENT OF THE AMOUNT OF SAID POLYEPOXIDE AND SAID POLYISOCYANATE.