Poly [3-(substituted)-3(hydroxymethyl)oxetane] and method of pre

Details Poly [3-(substituted)-3(hydroxymethyl)oxetane] and method of pre Poly [3-(substituted)-3(hydroxymethyl)oxetane] and method of pre

1988-06-03

1989-05-23

Nielsen, Earl

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 47, 525 56, 525 60, 525410, 525411, 528 10, 528 14, 528417, C08G 6522, C08G 6518, C08G 6532

Patent

active

048331830

ABSTRACT:
Poly[3,3-bis(hydroxymethyl)oxetane] ("PBHMO") is prepared in high molecular weight (n.sub.inh to 5.2) by polymerizing the trimethylsilylether of 3,3-bis(hydroxymethyl)oxetane with i-Bu.sub.3 Al-0.7 H.sub.2 O cationic catalyst at low temperature, followed by hydrolysis. PBHMO is crystalline, high melting (about 314.degree. C.), highly insoluble and useful in the production of films and fibers. Poly[3-methyl-3-(hydromethyl)oxetane] ("PMHMO") and poly[3-ethyl-3-(hydroxymethyl)oxetane] ("PEHMO") are also prepared in high molecular weight (n.sub.inh up to 3.8) by the same procedures. Copolymers of BHMO, MHMO, and EHMO with each other or containing up to about 50% of other oxethanes, oxiranes and tetrahydrofurans; derivatives and alloys from these polymers and copolymers; and methods of preparing the polymers, copolymers, alloys and derivatives into useful films, fibers and articles is described.

REFERENCES:
patent: 3338867 (1967-08-01), Plueddemann
patent: 3341475 (1967-09-01), Vandenberg
patent: 3417036 (1968-12-01), Vandenberg
patent: 3446757 (1969-05-01), Vandenberg
patent: 3694383 (1972-09-01), Azami et al.
patent: 3839235 (1974-10-01), Margraff

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